# Questions Asked onOctober 5, 2010

1. ## Chemistry

Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NOREACTION. Are my answers below correct? I used the textbook 1. sodium chloride and lead (II) acetate

2. ## Geographyand socity

1. _______________________ is the science of predicting the weather. (1 point) Climatology Ecology Meterology Botany 2. _______________________ is the condition of the atmosphere at any given location and time. (1 point) Weather Precipitation Climate

3. ## statistics

A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally.

4. ## Physics

The coefficient of kinetic friction between a suitcase and the floor is 0.272. If the suitcase has a mass of 90.0 kg, how far can it be pushed across the level floor with 700 J of work?

5. ## Physics

A skier traveling 12.0 m/s reaches the foot of a steady upward 18° incline and glides 18.2 m up along this slope before coming to rest. What was the average coefficient of friction?

6. ## science

From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest boiling point d) lowest

7. ## geography

why is the difference in solar receipt between 60N and 30N greater in the winter than in the summer?

8. ## statistics

Approximately 10.3% Of American High School Students Drop Out Before Graduation. Choose 10 Students Entering High School At Random. Find the probability that at least 6 will graduate

9. ## English-Writeacher

Recently my class and I read a short story called "A l is Calm." It is basically about this girl named Katherine and her grandma who is suffering from the Alzheimer's disease. It starts out as this: Katherine's grandma has to be taken to the doctor because

10. ## physics

Two blocks of masses m1 and m2 approach each other on a horizontal table with the same constant speed, v0, as measured by a laboratory observer. The blocks undergo a perfectly elastic collision, and it is observed that m1 stops but m2 moves opposite its

11. ## Geography

I had 2 questions need to be done by the night, please help me 1. Calculate the noon sun angle for New Orleans, USA(30N), and for Helsinki, Finland(60N), on each of the following dates: march 21, june21, sep 22, dec 22,10/3 2. What are the zenith angle and

12. ## Physics

Ball A leaves the edge of a level table with speed Va and falls to the floor. At the instant ball A leaves the table edge, another identical ball, B, is released from rest at the height of the table top and also falls to the floor. It is observed that the

13. ## physics

A small, m = 2.00 g plastic ball is suspended by a L = 25.0 cm long string in a uniform electric field, as shown in the figure below. If the ball is in equilibrium when the string makes a 14.0° angle with the vertical as indicated, what is the net charge

14. ## chem

Po-218 is an alpha emitter with a half-life of 3.0 minutes. If a sample contains 69 mg of Po-218, how many alpha emissions would occur in 6.0 minutes? the answer has to be _________a emmisions (which I have no idea what it means) and I use a chart thing

15. ## chem

Iodine-131 is often used in nuclear medicine to obtain images of the thyroid. If you start with 3.6 109 I-131 atoms, how many are left after approximately 1 month? I-131 has a half-life of 8.0 days. can you tell me how to do that problem and what answer

16. ## Physics

Assuming 100% of your energy can be converted to electrical power, and electricity costs \$0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units. I have 288.8 watts, and that's as far as I have

17. ## physics

A banked circular highway curve is designed for traffic moving at 55 km/h. The radius of the curve is 220 m. Traffic is moving along the highway at 38 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow

18. ## Organic Chem

A 20 g mixture containing 95% (by weight) of A and 5% of B is recrystallized in toluene (b.p. 110 C). Solubility for compound A is 1.5 g @20 degrees and 10 g @ 110 degrees. For compound B solubility is 0.5 g @20 degrees and 8 g @ 110 degrees. What amount

19. ## Chemistry

The heat of vaporization of water at 100C is 40.66 kj/mol find the change in entropy when 5.0 g of water vapor condenses to liquid at 100 C and 1 atm pressure

20. ## Physics

A child goes down a playground slide that is inclined at an angle of 24.5° below the horizontal. Find the acceleration of the child given that the coefficient of kinetic friction between the child and the slide is 0.305.

21. ## college physics

Three identical balls are thrown from the top of a building, all with the same initial speed. The first is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal. Neglecting air resistance, rank

22. ## PHYSICS

A jet flying at 135 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 1.82*10^5 kg. Calculate the magnitude of the necessary lifting force.

23. ## calculus

An isosceles triangle is drawn with its vertex at the origin and its base parallel to the x-axis. The vertices of the base are on the curve 5y=25-x^2 Find the area of the largest such triangle.

24. ## Physics

An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35 degrees above the horizontal. What is the length of the athlete's jump?

25. ## statistics

In a survey, 63% of Americans said they own an answering machine. If 14 Americans are selected at random, find the probability that exactly 9 own an answering machine.

I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

27. ## statistics

It has been reported that 83% of federal government employees use email. If a sample of 200 federal government employees is selected, find the mean, variance, and standard deviation of the number who use email.

28. ## Physics

A 1200-kg car rounds a corner of radius r = 45 m. If the coefficient of static friction between tires and the road is 0.93 and the coefficient of kinetic friction between tires and the road is 0.75, what is the maximum velocity the car can have without

29. ## Physics

In a cyclotron (one type of particle accelerator), a deuteron (of mass 2.00 u) reaches a final speed of 8.4% of the speed of light while moving in a circular path of radius 0.551 m. What magnitude of magnetic force is required to maintain the deuteron in a

Can you please help me with these problems, I followed the textbook but i am still not getting the write balanced equations.I am not sure if it is the phases or my balancing, or if i got the right answers and not submitting it correctly Please I really

31. ## biochemistry

Calculate the free energy of hydrolysis of ATP in a rat liver cell in which the ATP, ADP, AND Pi concentrations are 3.4, 1.3, and 4.8 nM, repectively. (ATP hydrolysis has delta G note= -30 kJ/mol)

32. ## math

A bag contains 100 bolts and 300 nuts 50% of each have been rusted 1 item is chosen at random. Find the probability that chosen item z rusted or a bolt.

33. ## Chemistry

Po-218 is an alpha emitter with a half-life of 3.0 minutes. If a sample contains 42 mg of Po-218, how many alpha emissions would occur in 6.0 minutes?

34. ## Physics

A long jumper leaves the ground at an angle of 20 degrees and travels a horizontal distanceof 7.0m before landing. What is the takeoff speed of the jumper? To be honest I really don't know how to solve it. A step-by-step explantion would be helpful.

35. ## Chemistry

seawater contains approximately 3.5% NaCl by mass and has a density of 1.02g/mL. What volume of seawater contains 1.0 g of sodium? Please Help!

36. ## Chemistry

An "empty" container is not really empty if it contains air. How may moles of nitrogen are in an "empty" two-liter cola bottle at atmospheric pressure and room temperature (25 degrees celcius)? Assume ideal behavior.

37. ## statistics

A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transaction time exceeds 50 seconds.

38. ## Chemistry

I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

39. ## geography

what is a deferred junction?

40. ## Physics

A m1 = 4.20-kg block on a smooth tabletop is attached by a string to a hanging block of mass m2 = 2.60 kg, as shown in the figure. The blocks are released from rest and allowed to move freely.

41. ## math

which greatest number when divided into 179 and 234 leaves a remainder of 3,? hint:subtract 3 from both no.

42. ## physics

The leg and cast in the figure below weigh 210 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 125 N. Determine the weight w2 and the angle á needed so that no force is exerted on the hip joint by the

43. ## PHYSICS

A 9.5-kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 80 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

44. ## health

What are the three parts of nutrition? what are nutrients? name the six classes of nutrients? if you eat a healthy diet, you are more likely to be what? what is metabolism? the nutrients in food that provide energy are what three things? the sugar that

45. ## physics

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 33.0 m above sea level, directed at an angle theta = 46.9° above the horizontal, and with a speed v = 33.7 m/s. Assuming

46. ## calculus

A shark, looking for dinner, is swimming parallel to a straight beach and is 90 meters offshore. The shark is swimming at a constant speed of 30 meter per second. At time t = 0, the shark is directly opposite a lifeguard station. How fast is the shark

47. ## physics

A stone is thrown vertically upward with a speed of 14.0 m/s from the edge of a cliff 89.0 m high

48. ## langue

Read each sentence. Write the subject on the subject line and the predicate on the predicate line. Zebra live in Africa 1. Subject_______________ 2. Predicate_______________

49. ## General Physics

The 5 kg block in the figure slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest.What is the coefficient of friction between the block and the

50. ## Chemistry

A 71 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her thyroid. If the nuclide has a half-life of 12 hours, how much of the nuclide remains in the patient after 4.0 days?

51. ## physics

A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.4 m and θ = 14°. The total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners

52. ## phusical science

spent steam from a electric generating plant leaves the turbines at 120 degrees celcius and is cooled to 90 degrees celcius liquid water by water from a heat exchanger. how much heat is removed by the cooling tower water for each kg of of spent steam

53. ## Physics

You whirl a 2.0 kg stone in a horizontal circle about your head. The rope attached to the stone is 1.5 m long. What is the tension in the rope?

54. ## Chemistry

Which of the following aqueous solutions should form a precipitate with aqueous Fe(NO3)3? 1. KCl 2. KNO3 3. KOH 4. K2SO4

55. ## physics

A baseball player hits a baseball (m = 0.145 kg) The ball is initially traveling horizontally with speed of 36 m/s. The batter hits a fly ball as shown, with a speed vf = 54 m/s. (a) What is the magnitude and direction of the impulse imparted to the ball?

56. ## Physics

A 1,500 kg crate hangs motionless from a crane cable. What is the tension in the cable? Ignore the mass of the cable. Suppose the crane accelerates the crate upward at 1.2 m/s2. What is the tension in the cable now?

57. ## Physics

Can anyone answer part 3 for me? I've tried so many incorrect answers that I've already given up: 1.00, 1.50, 2.00, 3.00, 9.40 Question: A slingshot obeying Hooke's law is used to launch pebbles vertically into the air. You observe that if you pull a

58. ## chemistry

Hi, I posted this question earlier but still need some help: 1.3188g of antacid is weighed and mixed with 75.00mL of excess 0.1746 M HCl. The excess acid required 27.20 mL of 0.09767 M NaOH for back titration. Calculate the neutralizing power of the

59. ## AP Chemistry

What is the value of w (work) when 2.6 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in

60. ## Physics

A golf ball is driven, by Emilee, horizontally from an elevated tee with a velocity of 90.65 km/hr. It strikes the fairway 6.34 sec later. How far has it fallen vertically? and how did u find it please

61. ## maths

a teen age boy wrote his own age after his father's from this new four place he subtracted the absolute value of the difference of their ages bto get 4289 the sum of their ages was

62. ## chemistry

An enzymatic hydrolysis of fructose was allowed to proceed to equilibrium at 25 degrees C. The original concentration of fructose-1-p was .2 M, but when the system had reached equlibrium the concentration of fructose 1-p was only 6.52 * 10 -5 M. Calculate

63. ## AP Physics

A 2.8 kg mass hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 9.0° with the vertical, as shown in Figure P4.68. Find the acceleration of the car.

64. ## geometry

Pyramid has a base 6 yards X 6yards. Its height is 4 yards. Volume= Surface Area= I got 60 square yards for the surface area but it was wrong.

65. ## PHYSICS

A satellite is placed in orbit 6.30*10^5 m above the surface of the planet Jupiter. Jupiter has a mass of 1.90 1027 kg and a radius of 7.14*10.7 m. Find the orbital speed of the satellite.

66. ## AP Physics

A woman at an airport is towing her 17.0 kg suitcase at constant speed by pulling on the strap at an angle of θ above the horizontal (Fig. P4.40). She pulls on the strap with a 26.0 N force, and the friction force on the suitcase is 10.0 N. What angle

67. ## Statistics

The weather forecaster reports that the probability of rain tomorrow is 10%. a. Which approach was used to arrive at this number? Was it the analytical (classical) approach, relative frequency approach or subjective approach?

68. ## social studies

colonists hoped to find land in upper canada. Identify three bariers they faced, ranking them in importance

69. ## Physics

A skier is gliding along at 6.24 m/s on horizontal, frictionless snow. He suddenly starts down a 19.9° incline. His speed at the bottom is 23.3 m/s. What is the length of the incline?

70. ## PHYSICS

The blade of a windshield wiper moves through an angle of 90.0° in 0.49 s. The tip of the blade moves on the arc of a circle that has a radius of 0.6 m. What is the magnitude of the centripetal acceleration of the tip of the blade?

71. ## Physics

A skier of weight 700N is pulled at constant speed up a smooth slope, of inclination 15 degrees, by a force of magnitude P N acting at 25 degrees upwards from the slope. Find the value of P.

72. ## Physics

A 10-kg wooden box rests on a wooden ramp. The coefficient of static friction is 0.50, and the coefficient of kinetic friction is 0.30. What is the friction force between the box and ramp if the ramp is at a 25o angle? the ramp is at a 45o angle? what is

73. ## Geometry

Yes, I'm this desperate. I just have problems with coming up with the statements for two column proofs. Answers would be appreciated. Given: line segment AX congruent to line segment DX, line segment XB is congruent to XC. Prove: Line segment AC is

74. ## daily oral language (DOL)

My answer was: We will see a play called "Cinderella" on Tuesday. My teacher says there is a comma after called. I say if there is a comma there, then doesn't one need to be after Cinderella also?

75. ## statistics

A major taxi company is concerned that its proportion of late arrivals has substantially increased in the past month. Historical data shows that on the average 18% of the company taxis have arrived late. In a random sample of 1,240 taxis, 310 taxis have

76. ## Chemistry

A 1L flask is filled with 1.25 g of argon at 25 degrees celcium. A sample of ethane vapor is added to the same flask until the total pressure is 1.45 atm. What is the partial pressure of argon in the flask?

77. ## calculus

An ice cube is melting so that its edge length x is decreasing at the rate of 0.1 meters per second. How fast is the volume decreasing when x = 2 meters?

78. ## social studies

Is the paleo indians nomadic or sedentary?

79. ## Physics

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

80. ## Math

James has an assigned seat for his flight to Denver. The seats on the plane are numbered 1-49. James's seat number is an odd number greater than 10 that is factor of 100. what is his seat number for the flight?

81. ## Physics

A 1.80 kg object is connected to a spring of force constant 120 N/m. How far is the spring stretched if it is used to drag the object across a floor at constant velocity? Assume the coefficient of kinetic friction is 0.60.

82. ## Chemistry

The following reaction is a step in the commercial production of sulfuric acid. 2SO2(g) + O2(g) 2SO3(g) The equilibrium constant is very high at room temperature, but the reaction is very slow. It must be run at high temperatures to achieve a reasonable

83. ## Physics

Consider the circuit shown in the figure below. Use the following as necessary: R1 = 11.00 Ù, R2 = 1.40 Ù, and V = 6.00 V. (a) Calculate the equivalent resistance of the R1 and 5.00 Ù resistors connected in parallel. 1 Ù (b) Using the result of part

84. ## Biochemistry

the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.

85. ## physics/ math

Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

86. ## Chemistry

The equilibrium constant for HI decomposition at 500 °C is 5.8×10-3. 2HI(g) > H2(g) + I2(g) At that temperature reactants and products are gaseous. (There is no change in the total number of moles, so Kc = Kp.) A sample of 0.49 mol of HI is placed in a

87. ## economics

Economic growth patterns decreased sharply from 1990-1991. Then they rose sharply and gradually leveled off up until 1999. However, inflation dropped steadily from 1990-1999. It decreased sharply at first and then leveled off from 1994--1994. Question 1 -

88. ## social studies

1. All of the following embraced the “national view” of federalism except a. John Marshall. b. Roger B. Taney. c. Franklin D. Roosevelt. d. Lyndon B. Johnson. e. Alexander Hamilton. I can't find the answer for this, they all federalist right? 2. What

89. ## physics

Three identical balls are thrown from the top of a building, all with the same initial speed. The first is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal. Neglecting air resistance, rank

90. ## math

the sum of the hieghts of all the students in Mrs.Maloneys class is 1,472 in. The mean height is 5ft 4in how many students are in the class? (1ft = 12in)

91. ## physics

For an interesting physics field trip, we visit Tahquamenon Falls in the Upper Peninsula. We measure the horizontal speed of the water at the top of the falls to be 3.98 m/s. How far vertically below the top edge of the falls does the velocity vector of

92. ## AP Chem

A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate)

93. ## physics

If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? Answer in m/s.

94. ## chemistry

if 400 mL of 0.1 M NaH2PO4 is mixed with 100 mL of 0.1 M H3PO4 what is the pH of the buffer mixture? The PKa of H3PO4 is 2.1.

95. ## Physics

A speedboat starts from rest and accelerates at +2.07 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.523 m/s2. Following this, the boat accelerates at -1.55 m/s2 for 8.00 s. What is the

96. ## Latin

I need help in translating this text. Primo Galli per vias hominum vacuas discurrebant ad praedam petendam; inde autem rursus ipsa solitudine absterriti secum "In Forum" inquiunt "ac propiora Foro loca redeamus. Ne qua fraus hostilis nos vagos excipiat."

97. ## physics

spherical aluminum ball of mass 1.22 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water.Calculate the radius of the cavity.

98. ## PHYSICAL SCIENCE

What is happening with parameters(pressure, volume, and temperature)of an air bubble released by a frog at the bottom of a lake and explain why?

99. ## Math

I am inside the path. (inside numbers 7,6,9,3) I am the difference of 2 numbers outside the path oyside numbers(7,8,5,6). What number am I? Use addition facts to help you.

100. ## statistics

a.Find the margin of error E for a 90% confidence interval. (5 points) Round your answer to the nearest hundredths. .

101. ## Physics

A skier of weight 700N is pulled at constant speed up a smooth slope, of inclination 15 degrees, by a force of magnitude P N acting at 25 degrees upwards from the slope. Find the value of P.

102. ## physics

hello, I need some help with this work problem that goes... If the height of a helicopter above the ground is given by h=3.25t^3, where h is in meters and t is in sec. After 1.50s, the helicopter releases a small mailbag. How long after its release does

103. ## Trig

Find the reference number and the terminal point determined by t. a. t = - 7(pi)/6

104. ## Chemistry Help

I have tried usingg the molecular formula, formulas in the text book but my answers dosent match any of the multiple choice answers, can someone help? For each of the reactions shown, calculate the mass (in grams) of the product formed when 10.7 g of the

105. ## Biochemistry

If 400 mL of 0.1 M NaH2PO4 is mixed with 100 mL of 0.1 M H3PO4, what is the pH of the buffer mixture. The pKa of H3PO4 is 2.1.

106. ## Calculus

Let f(x)=1x^3+2.5x+3. In this problem you will estimate f'(-3) by computing the average rate of change of f(x)over a small interval. Round your answers to three decimal places. 1. First choose the interval of length .1 with -3 being the left endpoint of

if the median height is 5ft 2in how many students in mrs maloneys class are 5ft 2in or taller? how many are shorter?

108. ## Math

Write an equation of the line satisfying the given condition. a) x intercept = 3 y intercept=-2 I am really not sure how to start here. b) vertical line containing (5,-1) Would it be y=5x-1? c) parallel to the line 3x-4y=5 and containing the points (3,-6)

i need help! how you Estimating quotients how you solve a problem. like this one? 195 divided 4 in estimating quotient?

110. ## Calculus

I don't understand this question. Q. In the theory of relativity, the mass of a particle with velocity "v" is m = mo/√(1-v2/c2) where mo is the mass of the particle at rest and "c" is the speed of light. What happends as v-->c-? Thank You!

111. ## English 2

1. Which is an example of verbal irony as spoken by Antigone? a. "You have yourself to consider, after all." b. "You must decide whether you will help me or not." c. "...and if I must die/ I say that this crime is holy..." d. "...if it means death/ It will

112. ## statistics

Based on a computed p-value of .01 and an alpha of .022, what is our decision in hypothesis testing?

Explain how 8 ten thousand can be equal to 80,000.

114. ## history

is late neo indians nomadic or sedentary?

115. ## college/Public Speaking

What might be some modern examples of speech styles that weren't discussed in the lecture? Don't think just in terms of public speaking. Consider such elements as how technology has changed communication in the last few years. Defend why you consider these

116. ## assessment of learning

When to use an identification type of test? Steps or guidelines in making an identification type of test. Thanks.

117. ## physics

A 23 kg suitcase is being pulled with a constant speed by a handle that is at an angle of 29° above the horizontal. If the normal force exerted on the suitcase is 150 N, what is the force F applied to the handle?

118. ## math

andy has 23 coins worth 3.65 consisting of only quarters and dimes.how manydimes does he have?

119. ## CIS 105

Most personal computers come equipped with a version of the Windows operating system, whereas Apple personal computers have a different operating system. Other choices are also available, such as UNIX and Linux. Why do you think Windows is so prevalent?

120. ## statistics

Based on a random sample of 25 units of lawnmowers, the average weight is 102 lbs., and the sample standard deviation is 10 lbs. We would like to decide if there is enough evidence to establish that the average weight for the population of lawnmowers is

121. ## MATH

A sphere has five times the volume of a right cone that has a radius of 4.6 cm and a height of 7.7 cm. Determine the radius of the sphere to the tenth of a centimetre. This question is multiple choice and these were the options: A. 2.2cm B. 3.4cm C. 5.9cm

122. ## Physics

A 10-kg wooden box rests on a ramp that is lying flat. The coefficient of static friction is 0.50, and the coefficient of kinetic friction is 0.30. What is the friction force between the box and ramp if no force horizontal force is applied to the box? a 20

123. ## Thermochemistry

Path A A sample of gas in a cylinder of volume 3.96 L at 327 K and 3.28 atm expands to 7.34 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J. Path B Path B has two steps. In the

124. ## math

which greatest number when divided into 1250 and 1000 leaves a remainder of 26 and 28 respectively, can u submit the ans.?

125. ## Chemistry

The equilibrium constant for HI decomposition at 500 °C is 5.8×10-3. 2HI(g) > H2(g) + I2(g) At that temperature reactants and products are gaseous. (There is no change in the total number of moles, so Kc = Kp.) A sample of 0.49 mol of HI is placed in a

126. ## statistics

One student is selected at random from a student body. Suppose the probability that this student is female is 0.5 and the probability that this student works part time is 0.6. Are the two events "female" and "working" mutually exclusive?

127. ## homework

What have forecast of economic growth done consistently? Economic growth patterns decreased sharply from 1990-1991. Then they rose sharply and gradually leveled off up until 1999. However, inflation dropped steadily from 1990-1999. It decreased sharply at

128. ## Chemistry

how many milliliters of a 0.78 M HCl solution are needed to react completely with 6.4 g of zinc to form zinc(II) chloride? Answer in units of mL.

129. ## physics

A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

130. ## algebra honors

I was placed into algebra honors instead of advanced math.. I am in 7th grade.. I have to maintain an 80% for the entire year or go to virtual school all summer.. My question is: Is there a special technique, formula, or very useful site that might help me

131. ## Physics

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration. How far are you from the intersection

132. ## statistics

A bag cntains 100 bolts nd 300 nuts 50% f each hv been rusted 1 item z chosen at random. Find da probability dat chosen item z rusted or a bolt.

133. ## music

How has Islam shaped conceptions of music for the peoples of the Middle East? I would rather a specific answer instead of saying using wikipedia. Thank you

134. ## economics

What have forecast of economic growth done consistently? Economic growth patterns decreased sharply from 1990-1991. Then they rose sharply and gradually leveled off up until 1999. However, inflation dropped steadily from 1990-1999. It decreased sharply at

135. ## statistics

Given a test statistic of z= 1.50, the p-value for a right-tail (upper tail) test is approximately

136. ## science

Suppose 65.8 g of Carbon monoxide reacts with 8.6 g of hydrogen. What is the limiting reagent? What is the theoretical yield of the product in moles and grams? If the actual yield of the product is 3.57 g, what is the percent yield?

how do you determine what atom gained or lost electrons

138. ## Chemistry

Draw the lowest energy conformation of 3-ethyl-2,4,4-trimethylheptane, depicting the C3-C4 bond on a sawhorse. How would i do this? i am so lost

139. ## Physics

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

140. ## Physics

A 1.50 kg object hangs motionless from a spring with a force constant of k = 250 N/m. How far is the spring stretched from its equilibrium length?

141. ## Physics

A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

142. ## Chem

Sulfur burns in the presence of oxygen to produce sulfur dioxide. Explain how the mass of sulfur dioxide produced compares to the combined mass of sulfur and oxygen.

143. ## Physics

You are driving a 2520.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides

144. ## chemistry

a reaction is first order and it takes 324 minutes for the reaction to be 50% complete. How long will it take for the reaction to be 85% complete at the same temperature?

145. ## physics

2. A car of mass 1540 kg traveling at 28 m/s is at the foot of a hill that rises 125 m in 3.6 km. At the top of the hill, the speed of the car is 8 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.

146. ## Math

I am outside the path. outside numbers 8,10,3,7)I am the difference of 2 numbers inside the path. Inside umbers are (2,6,9,10)I am less than 5. What number am I? I am inside the path. Inside numbers (2,4,6,7,9)`I am the difference of 2 numbers outside the

147. ## social studies

Is the meso indians nomadic or sedentary?

148. ## Math(Please check! Thank You)

List the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not

149. ## Chemistry Help

Calculate how many moles of NH_3 form when each quantity of reactant completely reacts 3N_2H_4(l)-->NH_3(g)+N_2(g) -2.5mol N_2H_4 -4.05mol N_2H_4 -65.8g N_2H_4 -4.52kg N_2H_4

150. ## physics

A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

151. ## Physics

A metal rod of length (L) moves with velocity (v), perpendicular to its length, in a magnetic field B, which is perpendicular to both the rod and its velocity. If the length of the rod is doubled, what happens to the electric field in the rod?

the worksheet says to copy and place parentheses to make each statement true. . . but i have NO ideaa what that means..? cann anyone helppp!

153. ## Physics

Mass 1 (10 kg) rests on a table connected by a string to Mass 2 (5 kg). If s = 0.30 and k = 0.20, what is a) the acceleration of each block? (Draw the figure and proceed). b) the tension in the connecting string?

154. ## Math

Kate is a salesperson in a retail store and earns \$88 per week plus 11% of her weekly sales. If Kate made \$154 one week,what were her sales that week? this is another word problem. I don't know the equation I was thinking 88 + .11 = 154x

155. ## Physics

A projectile is fired at an angle of 60degree with the horizontal and with the initial velocity 80m/s calculate (a) the time of flight(b)time to reach maximum height(c)it range(d)the velocity of projection 2seconds after been fired

156. ## Physics

Two blocks are connected by a string as shown in the figure. What is the acceleration, assuming there is no friction? (Draw the figure and proceed).

157. ## geometry

If AC = 15 centimeters, and BC = 12 centimeters, which does AB equal?

158. ## Ash

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.80 m/s. During the second part, she rides for 36 minutes at an

159. ## Trig

Find the value of the six trigonometric functions. t = 7(pi)/4 Can you show me step by step so I can see how this is solved? Also, do I need to graph this first in order to understand or begin the problem? I am trying to self teach - but having problems.

160. ## Government

I'm in Pre AP civics.. can you help me with my essay question? Please? :) How is the constitutional principle of federalism reflected in the formal amendment process?

161. ## Science

I need to unscamble the word 'IOLKSCAPL'

162. ## calculus

can someone check these for me: 18. All edges of a cube are expanding at a rate of 6 cm per second. How fast is the volume changing when each edge is a) 2 cm and b) 10 cm. a)72 cm^3/sec b)1800 cm^3/sec 20. The formula for the volume of a cone is

163. ## math

A man is walking at an average speed of 4 miles per hour alongside a railroad track. A freight train, going in the same direction at an average speed of 30 miles per hour, requires 5 seconds to pass the man. How long is the freight train? Give your answer

if you had a fraction strip folded into tenths, what fractional lengths could you measure with the strip?

165. ## chem

how do I figure out the molecular formula for The concentration of lead (II) ions in a sample of polluted water that also contains nitrate ions is determined by adding solid sodium sulfate.

Write an equation of the line satisfying the given condition. a) x intercept = 3 y intercept=-2 I am really not sure how to start here. b) vertical line containing (5,-1) Would it be y=5x-1? c) parallel to the line 3x-4y=5 and containing the points (3,-6)

167. ## Politcal Science

The principle of self-government emphasizes majority rule whereas the principle of liberty emphasizes individual rights. These principles a. are universal and are the foundation of all legitimate governments. b. have no real meaning in practice. c. have

168. ## college physics

Let the radius of the circular segment be 108 m, the mass of the car 1861 kg, and the coefficient of the static friction between the road and the tire 0.9. The banking angle is not given. Find the magnitude of the normal force N which the road exerts on

169. ## Science

What is a experimental investigation? What is a descriptive investigation?

170. ## PROBABILITY

5.70 The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your

171. ## statistics

5.70 The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your

172. ## chemistry

What are three thermodynamic quantities that are not state functions and three that are?

173. ## Physics

A cheetah is hunting. Its prey runs for 2.56 s at a constant velocity of +10.02 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?

174. ## Math

What is the number? It is greater than 30 and less than 40. If you add the digits, the sum is 10.

Will someone plz help me. I have looked through website after website and I cant find the right peron. Just like a page address or something or explain about his works and his life. Please and thanks!

asked by steenwick artist composer from the baroque period.
176. ## Math HELP

A man is walking at an average speed of 4 miles per hour alongside a railroad track. A freight train, going in the same direction at an average speed of 30 miles per hour, requires 5 seconds to pass the man. How long is the freight train? Give your answer

177. ## Science

What is the name of a gene that can be masked by another gene?

178. ## calculus

The sides of an equilateral triangle are increasing at the rate of 5 centimeters per hour. At what rate is the area increasing when the side is 10 centimeters?

179. ## calculus

there are two tangents lines to the curve f(x) = 3x^2 that pass through the point p =0,1 find the x coordinates of the point where the tangents line intersect the curve

180. ## physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.

181. ## Physics

Mass 1 (10 kg) rests on a frictionless table connected by a string to Mass 2 (5 kg). Find a) the acceleration of each block. (Draw the figure and proceed). b) the tension in the connecting string.

182. ## social studies

I post those questions earlier but no one reply to them. Complications in the practice of America’s ideals occurs because these ideals a. are general principles, not precise rules. b. sometimes conflict with one another. c. are only one of the many

183. ## Physics

A ball is thrown upward from the ground with an initial speed of 21.5 m/s; at the same instant, a ball is dropped from rest from a building 17 m high. After how long will the balls be at the same height? The acceleration of gravity is 9.81 m/s2. Answer in

184. ## Math

2g-tm=5m-gh (solve for m)

The Cost of installing new kitchen cabinets is \$150 for delivery for all the cabinets and an additional \$45 to install each cabinet. a) Develop a model to give the total cost for a set of n cabinets. b) What is the total cost for a set of 18 cabinets? c)

186. ## chemistry

I did a lab about melting point. It is asking me for the purity of the compounds? How do I find it? Do I use melting points or percent yield?

187. ## chemistry

write a balanced chemical equation for the reaction that occurs when aqueous solutions of sodium chloride and sodium iodate are mixed

188. ## Physics

rry leaves home at 4:07 and runs at a constant speed to the lamppost. He reaches the lamppost at 4:11, immediately turns, and runs to the tree. Larry arrives at the tree at 4:22. What is Larry's average velocity during his entire trip, if the lamppost is

189. ## chemistry

why does atomic size decrease cross a period? why does atomic size increase down a group?

190. ## physics

Consider the following statement: “When a rifle is fired horizontally, the bullet leaves the barrel and doesn’t drop at all for the first 45 meters of flight.” Is this statement true? Wouldn't this statement not be true because you don't know the

191. ## college physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.

192. ## algebra

90% of what number is 45?

193. ## algebra

I need help showing me how to do some problems.. 5. 28-0.3y = 0.7y-12 I got 10/400 or 0.025.. and 3c-4c+1=5c+2+3 I ended up getting c=1 but the book says it's wrong too.. What am I doing wrong?

194. ## social studies

Please check my answers 1) The American colonists based their right to revolt against Britain’s authority on the claim that a. the wealth of the new world belonged to them, since they had developed it through their labor. b. the colonial charters had

195. ## Physics

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection

196. ## Science

How do you represent data in a graph?

197. ## Physics

A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race? Answer 1 of 2

198. ## physics

What is the acceleration of a vehicle that changes its velocity from 120 km/h to a dead stop in 7 s? Answer in km/h·s

199. ## physics

Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

200. ## math

box of chalk and 2 staplers cost \$10.00. Three boxes of chalk and 2 staplers cost \$18.00. How much is a box of chalk and a stapler?

201. ## biology

suppose 23mL of NaOH was required. How much Carbonic Acid was neutralized? 1L of .01 NaOH contains ____ mol NaOH? lmL of .01 NaOH contains _____mol NaOH? 23mL of .01 NaOH contains _____ mol NaOH? 2 mol of NaOH react with 1 mol H2CO3 2.3 x 10^-4 mol of NaOH

202. ## chemistry

A high diver is standing at the edge of a platform, just about to leap over the side. At the top of the platform, what is the relationship between potential and kinetic energy?

203. ## math

if I buy 3 large sandwich wraps to serve at a picnic and 9 people will be at the picnic, show 3 different ways to cut the sandwiches so that each person gets an equal share

204. ## math

if I buy 3 large sandwich wraps to serve at a picnic and 9 people will be at the picnic, show 3 different ways to cut the sandwiches so that each person gets an equal share

205. ## government

I need help with this essay question!! PLEASEE! How do the formal amendment process and constitutional change by other means compare as expressions of popular sovereignty?

206. ## Chemistry

Does the molarity change with the volume? For example we did an experiment in lab with one trial containing 0.1 M KI at 100 mL and another with 50mL. So does the molarity (M) change with volume change?

207. ## Physics

An 18-year-old runner can complete a 10.0-km course with an average speed of 4.48 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.18 m/s. How much later should the younger runner start in order to finish the course at the

Please explain how you solve these problems. It is greater than 43 and less than 52.If you add the digits,the sum is 8? This us confusing.

209. ## English

What are two themes that may be present in a folktale?

210. ## Phyiscs

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.80 m/s. During the second part, she rides for 36 minutes at an

211. ## English-Writeacher

English-Composition The delayed thesis is the starting sentence. The conclusion is at the end. In the course of time an entity begins to comprehend the significance of its dear ones in its existence. Katherine, the protagonist of “All is calm”, by Ann

Can you help me with case study on leadership and communication MGMT 303 week 6

213. ## science

Fill in the blank... The amount of volume an object displaces in water is _____(less than/equal to/grater than) the volume of the object. please help cazz im going to have a test tommorrow about this ;)

214. ## math

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a nonlinear

215. ## physics

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 26 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward

216. ## social studies

Which of the following is not an objective of the Constitution? a. Protect the rights of the minority b. Establish the structure of the government c. Protect individual worth and dignity of all people d. Protect the rights of the majority

217. ## spanish

"Para las vacaciones, sólo pienso ver la tele." "Pero,_____" a. ¿hace mucho tiempo que ves la tele? b. ¿la puedes ver los miércoles? c. no podemos ir de vacaciones d. ¿no te van a doler mucho los ojos? Is the person watching tv only to see the

218. ## Physics

A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race?

219. ## Finance

Marcia and Phil Helm, a couple in their thirties, have been married for several years. They have no children, and each has a professional career. Marcia is a trainee for a management position at a large department store, and Phil is an engineer at an

220. ## chemistry

which is a chemical property? volume, mass, melting point, flammability or temperature?

221. ## physics

Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the

222. ## chemistry

A high diver is standing at the edge of a platform, just about to leap over the side. At the top of the platform, what is the relationship between potential and kinetic energy?

223. ## physics!!

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to

224. ## algebra

Evaluate x+y/5 for x = 34 and y = 6

225. ## chemistry

A 0.2528 g sample of a mixture containing sodium carbonate and sand requires 12.32 mL of 0.2409 M HCl(aq). Assuming that the sand does not react with the HCl(aq), what percentage of the mixture is sodium carbonate? Balanced equation: Na2CO3(s) + 2 HCl(aq)

226. ## calculus

differentiate f(x)=Tan^3(e^2x +1)

227. ## algebra

what is the quotient of the sum and difference of 370 and 25

228. ## Chemistry

Oxidation State numbers For Fe3+ i got 3+ b/c Oxidation state monatomic ion = ionic charge and i got that answer wrong. i am receiving wrong answers for these below aswell. I used these rules for the following -Alkali metals are always +1; alkaline earths

229. ## college chemistry

please help! If the initial pressure of I2(g) is 1.738 atm, calculate the % decomposition of I2(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.254. The initial pressure of the reaction products

230. ## Physics

A skateboarder shoots off a ramp with velocity of 6.5 m/s directed at a 59 degree angle. The end of the ramp is 1.3m above the ground. a)How high above the ground is the highest point that the skateboarder reaches? b) When the skateboarder reaches the

231. ## math

need help making a Data Bar Graph using Maximum:18 Mode:7 Range:13 Median:12

232. ## infectious diseases epidemiology

1. You are in charge of HIV prevention in Sydney, Australia, which celebrates a 2-week long Gay and Lesbian Mardi Gras and is famous for the sexual liberties taken during that period. Which groups, from those listed below, do you target for interventions?

233. ## math

which fraction is greater 15/31 or 27/50

234. ## English

I need to make a list of items each student can find in his pencil case or rucksack. I want to be sure the list is correct. 1) Lined, squared exercise-books, ring binder (or ring file?), colored pencils (or pastels), felt-tip pens, ballpoint pens,

Carefully describe the following distribution of ages (in years). Remember to include the shape, center, and spread. {20, 22, 24, 26, 23, 19, 34, 44, 25, 26} Are there any outliers? Justify your answer with calculations and explanation.

236. ## Physics

Mass 1 (10 kg) rests on a table connected by a string to Mass 2 (5 kg). Find the minimum coefficient of static friction for which the blocks remain stationary.

237. ## algebra

In 1995 the life expectancy of males in a certain was 61.8 years. In 1999, it was 64.5 years. Let E represent the life expectancy in tears t and let t represent the number of years since 1995. The linear function E(t) that fits the data is E(t)=____t

238. ## literature

which poet, who seems be using iambic pentameter, bends the meter most

239. ## English

Can you check if my corrections are OK? Thank you. 1) He told her that her husband's last words had been her name. 2) He arrived at the central station walking. (Better: he walked to the central station?) 3) The Expedition consisted of groups of ivory

240. ## Physics

You drive due east at 78 km/h for 55 min. Then you follow a road going 60 degrees south of east, going 99 km/h for another 38 min . Find your total displacement.

Lsit the intercepts and test for symmetry. y^2 - x - 4 = 0 I got (-4,0) and (0,2) for the intercepts. -y^2 - x - 4 = 0 Is not symmetrical to the x axis, correct? y^2-(-x) - 4 = 0 Is not symmetrical to the y axis, correct? -y^2 + x - 4 = 0 Is not

242. ## Math

Can you get 17 with the numbers 1,3,3,6? You can add sub mult and divide. I've tried and can't get an answer.

243. ## Chemistry

The law of conservation of mass states that no change is observed in the total mass of the substances involved in a chemical change. Thus the mass of the sulfur dioxide produced is the same amount as the sulfur and oxygen that went in. Does this sound

244. ## Physics

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection

245. ## physics

Madhuri throws a stone the stone is thrown horizontally at 33.9 m/s from the top of a 297.9m cliff. 1.How high is the stone after 3.35 sec? 2.What is the range? equations to find please.

246. ## history

Napoleon Bonaparte has been called the last of the enlightened despots. Discuss how his policies and practices resemble those of the enlightened monarchs of the old regime.

247. ## english

Please answer this question mi hoo na and kal ho na ho translat in english

248. ## English

In the following sentence, do I have the complete subject correct? Chunks of floating ice smaller than 50 feet long and with less than 17 feet showing above the water (end of subject) are called growler or bergy bits.

249. ## Physics

You are driving to the grocery store at 14.8 m/s. You are 140.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.440 s and that your car brakes with constant acceleration. How far are you from the intersection

250. ## Physics

A 5.0 kg object (m1) is connected to a 10.0 kg object (m2) by a string. If a pulling force F of 20 N is applied to the 5.0 kg object as shown, A) what is the acceleration of the system? B) what is the tension in the string connecting the objects? (Assume a

251. ## college physics

Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the

252. ## geometry

how would I draw a shoe using 2 acute and 2 obtouse angles

253. ## Math

How do I use KHDMDCM

254. ## ITALIAN

Hi, Can someone please tell me if I wrote this correctly in Italian? I included the English of what I meant to say. Q: Aspetta signore, posso leggere il tuo palmo? (Wait sir, can I read your palm?) A: No, grazie. (No, thank you.) Q: Aspetta! Vedo che hai

255. ## Algebra

How to factor this x^(3) - 8 = 0

256. ## Physical Science

Why a person can lie down(carefully) on a bed of nails, but can't step(without being injured)on a nail?

257. ## science

An airplane flies at 200km/hr. What is the velocity?

258. ## math

Question: Use logical equivalnces to show that the propositions !p -> (q->r) and q -> (p v r) are logically equivalent. I AM SO DAMN CONFUSED! I tried to solve !p -> (q -> r) first and I only got to !p -> (!q v r) I cant see any other rule that would apply

259. ## math

Place six coins on the table in the arrangement shown in the first row below... Start like this...head tales head tales head tales Your task is to produce the second arrangement shown by flipping coins according to thsi rule: you must flip two adjacent

260. ## Science

How are the structures in genetics related?

261. ## science:)

how do you measure the mass of a rectangular solid? list steps how do you measure the mass of an irregularly shaped solid?list steps.

262. ## math

Suppose that f(t)is a function for which f(80)=8.7and f'(80)=-2.2. Use this information to estimate the following. Round your answer to one decimal place. f(80-1)

using four different digits, what is the least sum you can get when you add two digit numbers?

264. ## algebra

Bob has \$4000 invested in an account that earns 4.75% simple interest. He has another account that earns 6.5% simple interest. How much is invested in the 6.5% account if it earned \$425.10?

265. ## VESPR theory

Is a bent tetraheydral the only shape that doesn't have a precise angle (as in it's less than 109.5 degrees)?

266. ## Math

I determined that 5 divided by 8 equals 0.625; however, I cannot determine how the book arrived at 0.625 equaling the fraction 4 5/8. My conversion of 0.625 is fraction 5/8.

write in order from least to greatest the six numbers whose digits are 2, 8, and 9

268. ## Math.. 3rd time posting /: HELP PLEASE!

Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3.

269. ## education

Why study educational history?

270. ## english

Please correct the following sentence for a daily oral language question: we will see a play called cinderella on tuesday I do not agree with how it was graded.

271. ## college chemistry

The value of the equilibrium constant, Kc, at a certain temperature is 4.00 x 10-1. Would the reaction as represented by the chemical equation favor reactants or products? Enter P or R. N2(g)+3H2(g) = 2NH3(g)

Can somebody tell me what to do next for solving polynomial equations? x^3 - 3x^2 -4x + 12= 0 I got the factors of 12 and i used 2. (x+2) (x^2 + x + 12)=0 What do I do next?

273. ## Physics

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection

274. ## AP English Lit.

So I'm doing an essay about the Mosque and being built near Ground Zero, but I have no idea on how to start my thesis. My opinion, to me, I don't really care because people are entitled to their opinion, which it should be built or not. Any ideas?

275. ## chem

Ionic bonds and covalent bonds, which one is the stronger. My present teacher said that covalent bond is the strongest one. I learned ionic interaction is the strongest and many chem. books say so. Now i am confused. Is my present teacher right. Please

276. ## SOCIAL STUDIES

WHAT DOES REGION PHYSICAL MEANS?

277. ## chem

Recycling of PET soft drink bottles involves heating with methanol and an acid catalyst to liberate ethylene glycol and dimethylterphthalate (methyl ester of pthalic acid). These can then be used as monomers to make new PET products. Write an equation for

278. ## Politcal Science

Complications in the practice of America’s ideals occurs because these ideals a. are general principles, not precise rules. b. sometimes conflict with one another. c. are only one of the many sources of political action. d. are enduring and powerful. e.

279. ## algebra

34 x (n x 2) = 680? me understand

280. ## To Writeacher

Writeacher I have a post on my English assignment, and I have it addressed to you, may you please take a look at it, cause I really need help, thanks.

city council decides to number homes on a new sub divison. However they leave out numbers that are multiples of 3 or 4 and the last home number is 67. How many homes are there on this street?

282. ## english

compare the kansas city star copy style and tips for writing for the web

284. ## English

Thanks for the correction I appreciated it.I am re-posting the narrative essay/summary please see if I have run on sentence, comma etc. It is due tomorrow.Thanks. When I was in Africa, my mind and heart were involved in things such as what it took just to

285. ## Physics

Free Fall: Tara throws a baseball down to Nathan. If she throws it with a speed of 2.0m/s and it lands in Nathan's hand with a speed of 10.0m/s, how far above Nathan is Tara?

286. ## college physics

Two workers are loading crates onto a pick up truck. Worker 1 lifts his crate straight up from the ground to the truck. Worker 2 slides his crate up a ramp which has frictionless rollers. Which statement is true about the work being done on the crate? a.

287. ## AP Chemistry !

Can you help me with this? If you can, do it as detail as you can. If not, you can just give me the answer, i'll try to figure how you did it :| A sample of gas in a cylinder of volume 3.96 L at 327 K and 3.28 atm expands to 7.34 L by two different

288. ## Calculus

It says find the numbers, if any, at which the given function is discontinuous. f(x)=abs(x+2) *abs - absolute value f(x)=e^xsinx for both of these problems i saw that it was continuous but i don't really know

It says find the numbers, if any, at which the given function is discontinuous. f(x)=abs(x+2) *abs - absolute value f(x)=e^xsinx for both of these problems i saw that it was continuous but i don't really know

290. ## Calculus

Find the horizontal and vertical asymptotes of f(x)=csc^-1(x) if they exist.

291. ## Physics

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection

292. ## ph

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection

293. ## Math

A number has 4 digits. The sum of the first and last digit is twice the second digit. The second digit is 2 less than the third digit. The last digit is twice the first digit. Some of the digits are alike. What is the number?

I am to find the subject complement and linking verb in this sentence. At first we felt overwhelmed by the job ahead of us. Could you please help me understand , the examples in my book are not helping. Thank you

295. ## Chemistry

If 3.0 L of a 5.0 M SrCl_2 solution is diluted to 40 L, what is the molarity of the diluted solution?

296. ## Math

State whether the equation defines y as a function of x. a) y=x^2-2x Yes b) y^2 = 3x-4 No c) 5x+7y=10 Yes Are my answers correct?

297. ## social studies

I have to think about the needs of fur traders, Aboriginal hunters, and farmers (for ex: land, water, and food). Then I have to tell how these and three other needs might come into conflict. So, the problem is that I cannot think of any other needs. is

298. ## Math

Paula saw 6 yellow birds and x blue birds while bird watching. James saw twice as many birds as Paula did. James saw 26 birds. Write an equation to find how many blue birds Paula saw while bird watching My answer is 2x(26-6) is this correct?

299. ## English 2

Need help with this-- 19. Several passions are dramatized in "The Tragedy of Julius Caesar." Choose one of them such as justice, vengeance, ambition, love, or honor, and write a paragraph about how that passion is illustrated in the action of the play.

Ashton broke apart a number into 30+7 what number did he start with?

301. ## math

Make up a data set of at least 12 numbers that have the following landmarks maximum18 mode 7 range13 median 12?

302. ## English

Which sentence is more common: 'I like seeing people happy' or 'I like to see people happy'?

303. ## MATH

WHAT FRACTION IS GREATER THAN OR EQUAL TO ONE?

304. ## calculus

Compute d/dx(4x+3/2x-5)^1/2

305. ## social studies

what is the role o education in development of human resources

306. ## chem

Recycling of PET soft drink bottles involves heating with methanol and an acid catalyst to liberate ethylene glycol and dimethylterphthalate (methyl ester of pthalic acid). These can then be used as monomers to make new PET products. Write an equation for

307. ## Math

When I'm rounded to the nearest ten, I'm 60. The digit in my ones' place is 2 more than the digit in my tens' place. Who am I?

308. ## Math, ( Help please?)!

Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3. Could someone explain to me how they found the answers

309. ## earth/space science

Walking along the sidewalk one day, you find a rock and want to know what kind it is. You look at it and se that it is an off white color, is greasy feeling when you rub it, and your fingernail scratches it and breaks it up. What kind of mineral do you

310. ## Algebra

What is the solution of -4x +1 > or equal to 7 I get these really confused on how to solve these. Thank you

311. ## social studies

What is not an objective of the constitution a. Protect the rights of the minority b. Establish the structure of government. c. protect individual worth and dignity of all people. d. Protect the rights of the majority This was to be corrected from class

312. ## algebra)

how do i identify the property shown in a number sentence..ex. 5x(2x4)=(5x2)x4

Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?

314. ## english

I need the following sentence to be one sentence. Does this sentence flow okay and is punctuation correct? Is there a better way to word the following sentence? I am applying for the position of office manager of surgical services at Barnes Hospital that

315. ## English

Directions: Write a concise response putting yourself in the role of "ethicist" and offering advice on how to handle the issue presented. The issue is "My high school requires that we dissect frogs. I am Buddhist, and we Buddhist have a reverence for all

316. ## algebra2 (math)

The Cost of installing new kitchen cabinets is \$150 for delivery for all the cabinets and an additional \$45 to install each cabinet. a) Develop a model to give the total cost for a set of n cabinets. b) What is the total cost for a set of 18 cabinets? c)

317. ## Westen Civ.

Which governmental bodies are responsible for making laws in the United States? How does a written law protect American democracy?

318. ## English

Slow Food vs. Fast Food Why is it better to buy local products for slow food? This is one of my bullets for an English essay.. I just need some guidance on how to set this up and main points.

319. ## Algebra

What is 9m+2m-8=5(m-2)

320. ## history

Is early neo indians nomadic or sedentary?

Which planet has the gravitational force that is closest to Earth's gravitational force?

322. ## SOCIAL STUDIES

WHAT DOES REGION PHYSICAL MEANS?

323. ## Math

-4/13y – 7=6 8a – 3+1.2a = 9 5f + 1/8 = -3 (Find the value of f) p + 3/10 = 4 (Find the value of p)

324. ## Math

I have a fraction x/1.2 If i multiply this fraction by x will I end up with the denominator on its own of 1.2x?

325. ## Physics

NEGATIVE DIRECTION 10 MILES FOR 3 HOURS, THEN POSITIVE DIRECTION 5 MILES OVER FOR 2 HOURS. WHAT IS HIS DISPLACEMENT? SPEED? VELOCITY?

326. ## math

-9-(-5) keep -9, change - to + and -5 to 5 -9+5=-4

327. ## algebra

Provide an example of at least five ordered pairs that do not model a function. The domain will be any five integers between 0 and 30. The range will be any five integers between -20 and 20. Why does your example not model a function?

328. ## chemistry

Ok so i know how to get density but what do you do if the two numbers you are given are 12.993 cm^3 and10.49 g/cm^3.. i know its is mass divided by volume or grams divided by cm but what would i do in the situation?? thanks

329. ## ipc

does a comound have a set or variable composition?

330. ## Math homework

Tell whether each number is a real number, rational number, irrational, interger, or whole number, and then order then from least to greatest. ( Square root sign) 49, 8, -( square root sign) 4, and -3. Could someone explain to me how they found the answers

331. ## Social Studies

Whatever may have been the extent of psychological knowledge at the time of Plessey vs Ferguson, this finding of the Kansas court is amply supported by modern authority. Any language in Plessey vs Ferguson contrary to the finding is rejected. We concluded

332. ## math

Diana takes 6 steps forward, then 2 steps back. If she repeats this pattern, how many steps will she be from where she started after 4 moves? After 5 moves?

333. ## Chem/DNA

Convert 10mg/mL into micrograms/microliters

334. ## trig

What is the graph of y = 3 sin (3x + 180)?

335. ## social studies

does anyone know the 4 prehistoric indian groups that lived in indiana?

336. ## Maths

In a triangle the angles are (x + 9)°, 3x ° and (2x + 3)°. Find the smallest angle.

337. ## physics

Two workers are loading crates onto a pick up truck. Worker 1 lifts his crate straight up from the ground to the truck. Worker 2 slides his crate up a ramp which has frictionless rollers. Which statement is true about the work being done on the crate?

338. ## reimbursement methodologies/ Penn Foster

Your an HMO director. You would like to ensure that your care plan is meeting industry standards. Whats one way you can do this

339. ## management

Which one are you most likely to use should you be in the position where you are responsibility for the productivity for a group of people? What strengths come along with this theory? What are its weaknesses?

340. ## English

Help with Analogies and suggest me other ways to write them please. Thanks 1)Smart people keep quiet about what they know, but stupid people advertise their ignorance.Changed into:Good drivers are hindered to show their driving skills, while reckless

Find the acceleration of the following reference frames i)when a reference frame fixed to the surface of the Earth at latitude 37 degree.ii)A reference frame with origin at the center of Earth with one axis always pointing toward the Sun. iii)A reference

342. ## math

What is the fraction in this fraction family? 33/27 44/36 66/54 Thanks.

343. ## algebra

The width of a retangle is fixed at 21cm. What linghts will make the perimeter grater than 74 cm?

344. ## algebra

Solve by elimination 7r-5s=41 5r+7s=61

345. ## Mathomewor

200 centimeters =_?_ meters? 300 centimeters = _?_ meters?

346. ## Mathomewor

200 centimeters =_?_ meters? 300 centimeters = _?_ meters?

4x

348. ## Algebra

What is 9m+2m-8=5(m-2)

349. ## AED 201

Are there certain curricular areas in which technology is more useful than in others? Explain your answer

350. ## math

-2x(-6)= - x - = + 12

351. ## algebra

34 x (n x 2) = 680?

352. ## positive psychology

Week 2: Online Presentation: “Tutorials & Guides-1” - Due Date: Day 3 [post to the Main forum] This week you will chose a topic from the Online Presentation Guidelines and follow the directions there. Use the PowerPoint presentation as a guide. Be sure

353. ## Enligsh

My teacher told me how to revise my thesis in terms of parallelism. I am not sure what she means or how to do it. This is my thesis: "School uniforms should be required in all public schools because not only do they cut down on the teasing and bullying but

354. ## English

Here are some more alternatives I'd like you to check. Thank you very much! 1) He was first mentioned to Marlow by the accountant. Can you also say: He was mentioned by the accountant for the first time? 2)His clothes were highly coloured. He was dressed

355. ## Art History

list the major category in which art expression can be clasify?

91 .12

357. ## Algebra

I4x-4I=8x+16 (The 2 "I" are absolute signs)

solve 3m=8m

359. ## english

Explain why it is necessary to have the following literary elements in a piece of literature.

360. ## English

The Great Coral Reef almost circles New Zealand it has more marine life than anywhere else in the world

361. ## math

how many vertacies does a cube have??

362. ## Math

How do you do this? I4x-4I=8x+16 (The 2 "I" are absolute signs)

363. ## math

waterline in my back yard is represented by the equation Y=-1/4x +8 What is the slope of the equation what is the Y intercept of the equation?

364. ## english

i do not a understand what a exemplum is. Could someone please help me and give an example to also help me understand. thanks

365. ## DIVIDING BINOMIALS

find the quotient: (-49y^4+42y^3)/7y

366. ## Social Studies

How did the weaknesses of Articles of Confederation affect the government in conducting the day-to-day business of a new country? Could this government succeed?

367. ## math

What's the domain of √((x-2)/(x^2+x-6)) (2,infinity] ?

368. ## math

5-(t+3)=-1+2(t+3) I don't know how to do it. I need help going over the steps

369. ## math

how do you find the function of the domaine

370. ## Math

How do I evaluate the expression for.. The square root of 4? ( I don't know how to do the sign on the computer)

371. ## MATH

-7-(-4) keep change change keep the -7 change the - to + and change the -4 to +4 so the question is going to-7 + 4= -3

372. ## Math

7/4 = 3/a (Find the value of a ) T-5/4 = 3/2 (Find the value of T) x/9 = 0.24/3 (Find the value of x )

3/x=5/10-2

374. ## high level chemistry

can anyone tell me about the molecular orbital energy order in energy level diagrams????its molecular n not atomic..... plz tell me its very urgent!!!!

375. ## Calculus: Application of Integration

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle and label ts height and width. Then find the area of the region. y=x^2 y^2=x

376. ## anatomy and phisiology 1

who has the answer for the test of anatomy and phisiology 1.

377. ## math

(16+ )+(14-7)=18+22

378. ## math

(16+ )+(14-7)=18+22

379. ## math

(16+____) +(14-7)=18+22

380. ## Science

A current of 7.50 amperes flows through an air conditioner. If the volyage in the wall outlet is 110 volts, what is the resistance in the air conditioner?

381. ## Medical

if john date is responsible for accounting services for weston hospital, he's the hospital's chief what?

382. ## social studies

what does bias mean?

383. ## Mathomewor

200 centimeters =_?_ meters? 300 centimeters = _?_ meters?

384. ## MATH!! NEED HELP! If I don't pass this, Ill fail!!

-20 = 7 + x/2 need to show work! :( I don't get it! Help!?

385. ## Us History

hi ms.sue i have a question that i need help .thanks for all the help that you had given me =) i really appreciate it. so i need help in this ,i don't undesrtand it . what would be the probable result of the national government sending military force

3/x+5/10-2

387. ## math question.

are all whole numbers real numbers?

388. ## algebra

how to graph y=x+3