# Questions Asked onOctober 15, 2010

1. ## physics

the mathematical relationship between velocity (v) and time (t) for a coin tossed up into the air after it leaves the thrower¡¦s hand at t = 0 with a velocity of +15.0 m/s. Assume that the positive direction is upward and the acceleration of the coin is

2. ## History/Geography

Essay question: Choose an article reporting on a site where a conflict is likely to occur in the future. Summarize the article and discuss what role, if any, culture will play in the situation. How am I supposed to write about something that MIGHT happen

3. ## Chemistry

What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?

4. ## physics

If a proton is accelerated from rest through a potential difference of 1500 V, find its final velocity. proton mass = 1.67 x10−27 kg

5. ## IGNOU probability

Among the examinees in an examination 30%, 35% and 45% failed in Statistics, in Mathematics, and in at least one of the subjects respectively. An examinee is selected at random. Find the probabilities that a. He failed in Mathematics only b. He passed in

6. ## math

a patrol boat took 2.5 hours for a round trip 12km upriver and 12km back. the speed of the current was 2 km/h. what was the speed of the boat in still water? ps: i just need to know how to make equations from the question above. it's supposed to create

7. ## Chemistry

An atom contains a total of 25 electrons. When the atom is in the ground state, how many different principal energy levels will contain electrons? a. 1 b. 2 c. 3 d. 4 I really don't get this because I thought energy levels went like 2, 8, 18, 32, and 50,

8. ## physics

As some molten metal splashes, one droplet flies off to the east with initial speed vi at angle θi above the horizontal, and another droplet flies off to the west with the same speed at the same angle above the horizontal, as inthe figure. In terms of vi

9. ## physics

a soccer player kicks a stationary ball giving it a speed of 20m/s at an angle of 15degrees to the horizontal. what is the maximum height reached by the ball?

10. ## Chemistry Help

If it takes three "breaths" to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 L balloon? i am trying to use v1/n1=v2/n2 but i am stuck, can u help? thank you

11. ## Organic chem

Classify each as a lewis acid or lewis base... A)H20 B)O2- C)Cu2+ D)SO3 E)AlCl3 Lewis acids are electron pair acceptors. Lewis bases are electron pair donors. Look at H2O, for example. .. H:O: .. H This molecule has no "holes" to accept an electron. Would

12. ## chemistry

Write a balanced chemical reaction to show the dissociation of solid magnesium chloride (MgCl2) in water, indicate states of the reactants and products

13. ## Physics

Two archers shoot arrows in the same direction from the same place with the same initial speeds, but at different angles. One shoots at 45.0degrees above the horizontal, while the other shoots at 60.0 degrees.If the arrow launched at 45.0 lands 225 from

14. ## Geography/History

Multiple select. The dissolution of the Union of Soviet Socialist Republics _____. 1) had no effect on the United States 2) affected nations throughout the world 3) reduced the number of Communist nations in the world 4) increased the number of Communist

15. ## french

kindly make 7 sentences with the verb ".HABITER". THANKS.....IAM A 4TH GRADE STUDENT.

16. ## Geography/History

Incidents of Basque violence are caused by their desire for _____. 1) educational opportunities 2) improved health care 3) increased wages 4) independence I think it is 4. I just want to know if I am right. help?

17. ## physics

A flatbed truck is carrying a heavy crate. The coefficient of static friction between the crate and the bed of the truck is 0.66.What is the maximum rate at which the driver can decelerate and still avoid having the crate slide against the cab of the

18. ## calculus

If f has domain [0, infinity) and has no horizontal asymptotes, then lim_(x->infinity) f(x) = infinity or lim_(x->infinity) f(x) = -infinity. Can someone please clarify whether this statement is true or false? Thank you

19. ## Physics

A physics book slides off a horizontal tabletop with a speed of 1.10m/s . It strikes the floor in 0.350s . Ignore air resistance. The height of the tabletop above th floor is .600m.The horizontal distance from the edge of the table to the point where the

20. ## physics

A carton lies on a plane tilted at an angle theta 29 degrees to the horizontal, with a friction of uk .12.If the carton starts from rest 7.90 up the plane from its base, what will be the carton's speed when it reaches the bottom of the incline?

21. ## Organic Chem

Classify each as a lewis acid or lewis base... A)H20 B)O2- C)Cu2+ D)SO3 E)AlCl3

22. ## Chemistry

Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid. Write a balanced chemical equation for this reaction. Express your answer as a chemical

23. ## college

A bag contains a mixture of copper and lead BBs. the Average density of the BBs is 9.50g/cm^3. Assuming that the copper and lead are pure determine the relative amounts of each kind of BB

Find d2y/dx2 in terms of x and y. y5 = x6

25. ## Calculus ll - Arc Length/Simpson's Rule

Use Simpson's Rule with n=10 to estimate the arc length of the curve. Compare your answer with the value of the integral produced by your calculator. x = y + y^(1/2), 1 ≤ y ≤2

26. ## physics

The tension at which a fishing line snaps is commonly called the line's "strength." What minimum strength is needed for a line that is to stop a salmon of weight 85 N in 9.0 cm if the fish is initially drifting at 2.5 m/s? Assume a constant deceleration

27. ## Physics

Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7 ×

28. ## prob and stats

The scores on an Economics examination are normally distributed with a mean of 77 and a standard deviation of 18. If the instructor assigns a grade of A to 16% of the class, what is the lowest score a student may have and still obtain an A? (Give your

29. ## mathmath

A study conducted by the Metro Housing Agency in a midwestern city revealed the information below concerning the age distribution of renters in the city. (Round your answers to four decimal places.) Age Adult Population, % Group Who Are Renters, % 21-44 53

30. ## Chem

A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 8.0 atm? This is a new chapter were covering and i have no idea how to do

31. ## Chemistry

Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe

32. ## Physics

A physics book slides off a horizontal tabletop with a speed of 1.10m/s . It strikes the floor in 0.350s . Ignore air resistance. The height of the tabletop above th floor is .600m.The horizontal distance from the edge of the table to the point where the

33. ## Physics

A football is thrown with an initial upward velocity component of 15.0m/s and a horizontal velocity component of 18.0m/s . How high does it get above the ground? How much time after it is thrown does it take to return to its original height? How far has

34. ## Physics

The compass in a plane indicates that the plane is heading due east, with an airspeed of 250 km/h (Vpa). A steady wind is blowing with a magnitude of 75km/h, which increases the velocity of the plane, relative to the ground. If the plane is going along a

35. ## chemistry

write a balanced chemical reaction for the reaction of aqueous magnesium chloride with aqueous potassium phosphate to form solid magnesium phosphate (Mg3(PO4)2) and aqueous potassium chloride (KCl). Indicate the physical states of the reactants and

36. ## statistics

A company manufactures calculators in batches of 64 and there is a 5% rate of defects. What is the standard deviation for the number of defects per batch?

37. ## algebra 2

suppose you are enclosing a rectangular area to create a rabbit cage. you have 80 ft of fence and want to build a pen with the largest possible area for your rabbit, so you build the cage using an existing building as one side. make a table showing the

38. ## physics

Part B Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 21. As the snow begins to melt, the coefficient of static friction decreases and the snow eventually

39. ## ap chemistry

i am having trouble writing the half reactions and the balanced equation for the galvanic cell Ag(s) |AgI(s) | I−(aq) || Cl−(aq) |AgCl(s) |Ag(s)

40. ## physics

Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 21. What is the minimum value of the coefficient of static friction that will keep the snow from sliding down in

41. ## Chemistry

In a simple titration experiment how and why are the results reproducible?

42. ## calculus

Find d2y/dx2 in terms of x and y. y5 = x6

Communist Prison Camp In such prisons the total regimen, consisting of physical privation, prolonged interrogation total isolation from former relationships and sources of information, detailed regimentation of all daily activities, and deliberate

44. ## english

_____ wrote humorous tales about the Gold Rush. Guy de Maupassant Frank R. Stockton Mark Twain

45. ## physics

A 11.0 box is released on a 37 incline and accelerates down the incline at 0.25 .What is the coefficient of kinetic friction?

46. ## prob and stats

A coin is weighted so that the probability of obtaining a head in a single toss is 0.37. If the coin is tossed 27 times, find the following probabilities. Round your standard normal variable to two decimal places before using the table of values. (Give

47. ## English 2

(From A Separate Peace) 9. Finny's behavior in the snowball fight suggests that his life is a. one long struggle b. based on disorder and unpredictability c. governed by strong loyalties d. marked by a basic dishonesty B? Or C..not sure Thanks -MC

48. ## Calculus

Find the equation of the tangent line to the curve (a lemniscate) 2(x^2+y^2)^2 = 25(x^2-y^2) at the point ( -3 , -1 )

50. ## statistics

A company manufactures calculators in batches of 64 and there is a 5% rate of defects. What is the standard deviation for the number of defects per batch?

51. ## physics

boy pulls a toy cart of mass 2 kg with a force of 3 N at an angle of 60° with respect to the horizontal road. What is the acceleration produced by the cart?

52. ## maths

a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

53. ## prob and stats

The tread lives of the Super Titan radial tires under normal driving conditions are normally distributed with a mean of 34000 mi and a standard deviation of 1700 mi. (a) What is the probability that a tire selected at random will have a tread life of more

54. ## biology

Why do we tend to assume that natural chemicals are safe while industrial chemicals are evil? Is this correct?

55. ## physics

Part C Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 21 degrees. If the edge of the roof is 11.0 above ground, what is the speed of the snow when it hits the

56. ## Physics

A cable passes over a pulley. Because of friction, the tension in the cable is not eh same on opposite side of the pulley. The force in one side is 110 N, and the force on the other side is 100 N. Assume that the pulley is a uniform disk of mass 2.1kg and

57. ## statistics

A basketball player has a 76% chance of making a free throw. What is the probability of her making 104 or more free throws in 119 trials? Round your standard normal variable to two decimal places before using the table of values.

58. ## Chemistry

Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe

59. ## Physics

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 15.5 m long. The bowler hears the sound of the ball hitting the pins 2.50 s after the ball is released from his hands. What is the speed of the ball? The speed of sound

60. ## math

mr jones buys a new car for \$50,000. the car decreases in value at the rate of 30% each year. find the value of the car after two years.

61. ## physics 111

A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 10.0 N force directed 25.0° below the horizontal. 1) what's the work done by the applied force? in joules 2)whats the work done by the normal force exerted by the

62. ## Calculus

If 12x − 52 ≤ f(x) ≤ x2 + 4x − 36 determine lim x→ 4 f(x) = What theorem did you use to arrive at your answer?

63. ## Math

I'm doing proportions, and I'm kinda confused with this one problem.. x/3=1/5. the way I do proportions is by cross multiplying, so I get 3=5x? I don't know what my answer would be?

64. ## Physics

A 20kg box rests on a rough floor. It takes a horizontal force of 40 N to keep the box sliding at a steady speed. Suppose a force of 100 N is applied to the box. What speed would thr box have after sliding for 3.0m?

65. ## statistics

sat scores around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank within the population. show all

66. ## Calulus

Consider the following function. f(t) = 3t2 − 3 (a) Find the average rate of change of the function below over the interval [3, 3.1]. (b) Compare this average rate of change with the instantaneous rates of change at the endpoints of the interval. (at t =

67. ## ap chemistry

would the half reactions for Ag(s) |AgCl(s) |Cl−(aq) || Cl−(aq) |Hg2Cl2(s) |Hg(§¤)be Ag+Cl+e==> AgCl 2Cl+3Hg==>Hg2Cl2+Hg+e

68. ## algebra

the sum of three numbers is 60. One number is ten more than a second number. It is also twice the third. Find the numbers. The three numbers are

69. ## Physics

A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless

70. ## English

Wolunteering at an orphanage. I have worked at an orphanage. There were a lot of work to do. I talked with children there and helped them with math. I taught them English, too. I was happy because I could help others. (Would you check the passage above?)

71. ## COM 220

I am needing to write an outline on Immigration in the United States. Here is my thesis " While immigration has positive results to the U.S., illegal immigration laws must be enforced to reduce the negative impavt of costs and the admittance of legal

72. ## chemistry

10.0 mg of a certain protein were dissolved in water to make a solution of 3.50 mL at 28.0o C. If the osmotic pressure is 1.30 torr, what is the molar mass of the protein?

73. ## Quantitative Literacy | MAT106 VG

Pick four cities and divide them into pairs. Use the Internet to find the length of the circle between the first pair of cities. You might try using the site Great Circle Mapper or a similar Web site to help you. Estimate the great circle path between

74. ## CHEMISTRY

At 63.5 degreesC, the vapour pressure of H2O is 23.3kPa and that of ethanol is 53.3kPa. A solution is made by mixing egual masses of H2O and C2H5OH. a. what is the mole fraction of ethanol in the solution? b. assuming ideal-solution behaviour, what is the

75. ## physics

calculate the force on an airplane which has acquired a net charge of 180 C and moves with the speed of 180 m/s perpendicular to the earth's magnetic field 5.0 x 10^-5 T.

76. ## maths

In a test there were 25 multiple-choice questions. They were marked as follows: 2 marks for each correct answer 0 marks for a non-attempt -1 mark for an incorrect answer. Sarah attempted 4 5 of the questions and received 22 marks. How many questions did

77. ## Chemistry

What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?

78. ## physics

Consider three layers of a wall. The first layer is plaster 1.0 cm thick (R = 0.033 SI units), the second layer is fiberglass insulation 8.9 cm thick (R = 2.97), and the outside layer is wood 3.0 cm thick (R = 0.33). What is the heat loss through one

79. ## Math

1. Look at the two monomials below. 9u3v2w4 15u4v4w3 What is the least common multiple (LCM) of the monomials shown above? 3u3v2w3 45u4v4w4 45u3v2w3 3u4v4w4

80. ## physics

A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon is rolling forward at a

81. ## CHEM

Could you please tell me if these are right? Write an equation for the following reactions. Write the correct formulas of the reactants and products. Then correctly balance each equation. A.) Potassium and oxygen gas react to form potassium oxide. I got

82. ## math

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2^2 3^2 (that is 2 squared

83. ## physics

0.5 mol of salt (NaCl) is dissolved in 4.5 mol of water. What is the increase in entropy? Answer a. 13.5 J/K b. 84 J/K. c. 9.8 J/K. d. 2500 J/K.

84. ## ap chemistry

what is the galvanic cell for the redox reaction between sodium dichromate and mercury(I) nitrate in an acidic solution.

85. ## Modern (Abstract) Algebra

Let f:A->B, where A and B are nonempty Prove that f(S1 - f(S2) is a proper subset of f(S1 -S2) fo all subsets S1 and S2 of A. Give an example where there are subsets S1 and S2 of A such that f(S1) - f(S2) does not equal f(S1-S2)

86. ## algebra

the sum of the four angle measures of any convex quadrilateral is 360 degrees. if a certain convex quadrilater has angle measures of 60, 2y-10, and 10y+5 degrees, what is an expression for the degrees measure of the fourth angle?

87. ## Physics

One-fourth of length L is hanging down over the edge of a frictionless, table. The rope has an uniform, linear density (mass per unit length), lambda, and the end already on the table is held by a person. a) How much work does the person do when she pulls

88. ## physics

A horizontal spring, resting on a frictionless tabletop, is stretched 14 from its unstretched configuration and a 1.00- mass is attached to it. The system is released from rest. A fraction of a second later, the spring finds itself compressed 3.6 from its

89. ## Chemistry

zink and sulfur Express your answer as a chemical formula. I entered Zn+2,S-2 and it said this to me There is an error in your submission. Make sure you have formatted it properly.

90. ## physics

a 1200kg car is moving at a steady speed of 25 m/s down a level road. The engine is exerting a steady force of 800N. What is the force of resistance the motor is overcoming?

91. ## CHEMISTRY

Lysozmyne is an enzyme that breks bacterial cell walls. A solution containing 0.150g of this enzyme in 210ml of solution has an osmotic pressure of 0.217kPa at 25*C. What is the molar mass of Lysozmyne? I cant find the chemical formula anywhere. I have

92. ## calculus

If f is continuous on [-1, 1] and f(-1) = 4 and f(1) = 3, then there exists a number r such that |r| < 1 and f(r) = π. Can this be true or false? Please and thank you

93. ## Probability - CHECK ANSWERS

I have an eight pack of crayons. Colors red, green, blue, orange, black, gray, pink, and purple. What is the probability of choosing the green crayon? 12.5 percent What is the probability of choosing the red, blue, or gray crayon? 37.5 percent What is the

94. ## statistics

Sat scores l around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distributions. a person who scores 600 on the sat 1 has approximately what percentile rank within the population?

95. ## Math

in the sieve of Eratosthenes for numbers less than 100, explain why after we cross our the multiples of 2 3 5 and 7 the remaining numbers are primes.

96. ## english

Every paragraph in a critique should _____. -focus on an aspect of the theme -mention the protagonist -be centered around one main idea

97. ## Physics

A 20.0 kg crate is pushed across a rough floor for a distance of 90.0 cm. When the force pushing the block is equal to 80.0 N and applied at an angle of 18.0 below horizontal to the block, the block moves at a constant speed of 2.10 m/s. What is the net

98. ## CHEMISTRY

Dr BOB can you explain this to me. I am so struggling with this subject. NO one has helped me on this one yet can anyone help me? during a typical breathing cycle the CO2 concentration in the expired air rises to a peak of 4.6% by volume. Calculate the

99. ## Chemistry

Write a formula for the ionic compound that forms between each of the following pairs of elements. 1. aluminum and oxygen Express your answer as a chemical formula. AlO and Al2O3 and Al2O3 the 2 was the bottom right cornor and I got this message Use

100. ## english

10 simple sentences about my pet(dog)

101. ## chemistry

i need someone to explain this to me as im doing a lab next week... for determining the calorimeter constant using a simple calorimeter how would one calcualte the calorie constant? i knw theres an equation involving the warm water and hot water ect ect

102. ## CHEMISTRY- boiling point

0.1m aqueous solution of HCl and 0.1m aqueous solution of C6H12O6. calculate the boiling point of each i know the eq. dTb=Kbm but i have no temperatures. this is the question

103. ## physics

A horizontal force of 20 N acted on a 10 kg mass at rest. The force accelerated the mass over a rough surface so that the mass had a speed of 6.0 m/s after 5.0 seconds. How much friction was acting on the mass?

104. ## physics

For the question about friction force impeding motion. I'm sorry I tried what you wrote and did not get the correct answer. Its' not your fault. I am doing university phys and have never taken it before. I am little confused about what to do. Could you put

105. ## English ErR

Please check it Shaharzad is very brave and daring woman. She put her life on the death line to prove her point. Everyone has courage to do some thing better with their own selves. but it require ton of nerve and dare to do better for some one else .But

106. ## statistics

–/3 points Notes Question: TanColM7 8.6.003. TKK Products manufactures electric light bulbs in the 50-, 60-, 75-, and 100-watt range. Laboratory tests show that the lives of these light bulbs are normally distributed with a mean of 774 hr and standard

107. ## chemistry

How will the relative number of moles of Mg and O be affected if the following procedural errors are made? Briefly explain (1) the crubile is not brought to constatn mass before the Mg is added. (2) water is not added after the first heating of Mg, and the

108. ## English

Working at a nursing home. I have volunteered at a nursing home. There were some work to do. I talked and listened to elderly people. I also cleaned the rooms at the nursing home. I was glad because I could help elderly people. (Would you like to check the

109. ## finance

A small chemicalcompany is negotiatimg a loan from Manhatten Bank and Trust. The small chemical company needs to borrow \$500,000. The bank offers a rate of 8 1/4 % with a 20% compensating balance, or as an alternative 9 3/4% with additional fees of \$5,500

110. ## English

Can someone please help to come up with a thesis statment for the "Great Gatsby" i wanna talk about alluring apperience and Gatsby's quest for the american dream

111. ## math

If 6x - 3y= 30 and 4x= 2-y then find x+y.

112. ## calculus

The tangent line to the graph of y = h(x) at the point (-6, 9) passes through the point (6, 2). Find the following values. (a) h(-6) (b)h '(-6)

113. ## General Chemistry

How much heat is absorbed by a 25.0-g sample of gold at 25.0 degrees celcius when it is immersed in boiling water?

114. ## Chemistry

A mixture of gases collected over water at 14C has a total pressure of 1.198 atm and occupies 72 mL. How many grams of water escaped into the vapor phase?

115. ## surveying math

I need help with this problem and I need to show my work. Can anyone help me? A vertical angle of -40 is recorded between A and B. The slope distance, after meteorological corrections, is 806.388 m. What is the horizontal distance between A and B?

116. ## Calculus

Find the derivative of y=(2x²+x)²°°.

117. ## statistics

suppose you have a set of blood pressures with a mean of 80 diastolic, and standard deviation of 5 points. assuming a normal distribution of blood pressures what two values should 95% of all blood pressures lie? please show all calculations. thank you very

118. ## statistics

Starting with the data values 70 and 100, add three data values to the sample so that the mean is 96, the median is 97, and the mode is 97

119. ## Science

I have my results from a simple titration experiment (sodium carbonate against hydrochloric acid) Average titre of 53.27 cm3 which i am happy with but how can i reason that my results are accurate?

120. ## American History

public opinion is ordinarily used in reference to the whole society. this perspective is

121. ## Physics

A 20.0 kg crate is pushed across a rough floor for a distance of 90.0 cm. When the force pushing the block is equal to 80.0 N and applied at an angle of 18.0 below horizontal to the block, the block moves at a constant speed of 2.10 m/s.

122. ## calculus

Can someone please help explain these two questions for me. For the first one my guess is that it is -infinity and for the second question it would be at 0. Find the limit. lim_(x->infinity) (x^(3) - 2x + 3)/(4 - 5 x^(2)) Locate the discontinuities of the

123. ## Chemistry

You have a stock solution of 13.4 M NH3. How many milliliters of this solution should you dilute to make 100.0 mL of 0.100 M NH3

mat ran 1/5 mile less on monday then on tuesday. he ran 1/2 mile less on wednesday than he did on monday. he ran 7/10 mile more on friday than on wednesday. if matt ran 4/5 mile on friday, how far did he run on tuesday?

125. ## Math

What does it mean 2x is divisible by 6? that 2x can be divided by 6. so 6 / 2x

126. ## Physics

A toboggan (with a mass of 15.0 kg) is being pulled by two people who are each holding their own rope, horizontally with an angle 35 degrees off the direction of travel. They are each pulling with a force of 40.0 N, against a friction force of 20.0 N. a)

127. ## Math

What does it mean by: Show that the "value of 3x^2-6x+5" cannot be less than 1. ?

128. ## spanish2

what is the correct verb form of yo, tu, and ustedes?

Use the distributive property to simplify: 25(2x + 1/5).

130. ## physics

A 11.0 box is released on a 37 incline and accelerates down the incline at 0.25 .What is the coefficient of kinetic friction in units uk? What is the friction force impeding its motion in N?

131. ## calculus

Find the derivative of y=(s^3+12)^(1/6)

132. ## chemistry

Which one of the gollowing represents the theoretical yield, in grams, of precipitate for the double displacement reaction if 25.0 mL of 1.75 M aqueous calcium nitrate is added to 15.0 mL of 1.50 M sodium phosphate?

133. ## Chem

Aviation fuel is significantly more expensive per gallon than diesel fuel. Why then is aviation fuel still used in Planes?

134. ## Physics

A certain force made a 5.0 kg mass accelerate at 4.0 m/s^2. This same force made another object accelerate at only 0.8 m/s^2. Find the mass of the second object. I have no idea how to do this. Do i use m=1/a? What do i do?

why has U.S. currency increased now? and euro currency decreased? PLEASE HELP ME I HAVE A TEST !!!

136. ## methods of researh

you are conducting research on sex diffrences in e-mails.Your hypothesis is that men use more declarative statements and women use more questions. what are the advantags and disadvantages using the archival method in psychology and methods of research

137. ## Help me please with physics

A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. a) what speed does the mass have after 4.0 seconds? b) what speed does the mass

138. ## new physics

a man leaves his house for 2 hours. after walking in a straight line for two hours he is 10 miles from home. calculate the man's average speed in terms of miles per hour.

139. ## college

A newly discovered planet is found to have a circular orbit, with a radius equal to 11 times the radius of Earth's orbit. How long does this planet take to complete one orbit around the Sun?

140. ## calculus

Find the linearization of the function below at x = π y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. Don't understand this problem. please help..

141. ## HCA 230

describe different coping and support strategies for dealing with stress related medical issues. Include the following strategies action facilitating support and nurturing support. I just need to figure out what are some stress related medical issues??

142. ## Calculus

Find the derivative by the limit process. 6/√(8x)

143. ## physics

In a fully random distribution, we can determine the most probable state from what two quantities? Answer a. The number of particles and the net momentum. b. The number of particles and the total energy. c. The net momentum and the total energy. d. the

144. ## physics

Since the industrial revolution, the Earth's average surface temperature has Answer a. risen about 1 K. b. has risen about 3 K. c. has risen about 5 K d. Has not changed significantly.

145. ## calculus

Integrate x^2+5x+1dx/(2x^3+15x^2+6x+23)^1/2

147. ## physics

Why is there a minus sign in the formula Î”p/Î”t = âˆ’Î”EP/Î”s? Answer a. Objects are accelerated to higher kinetic energy. b. Objects seek zero motion. c. Objects are accelerated toward higher potential. d. Objects are accelerated away

148. ## Chem

What is the volume occupied by 24.4 g of argon gas at a pressure of 1.31 atm and a temperature of 464 K? n=24.4g P=1.31atm T=464 Find V i tried working it out and i got 7091.98 and is inncorrect can i get some help?

149. ## physics

What does the concentration of field lines represent? Answer a. The direction that a positive test charge will be pushed. b. The direction that a negative test charge will be pushed. c. The strength of the force on a positive test charge. d. The strength

150. ## Modern (Abstract) Algebra

Let f:A->B, where A and B are nonempty Prove that f(S1 - f(S2) is a proper subset of f(S1 -S2) fo all subsets S1 and S2 of A. Give an example where there are subsets S1 and S2 of A such that f(S1) - f(S2) does not equal f(S1-S2)

151. ## chemistry

What element has 20 protons and forms a +2 Cation?

152. ## physics30sh

a 1000 kg car engine exerts a force of 3000 N while the car accelerates from 20 m/s to 30 m/s is 5.0 seconds. How much force of resistance does the car experience?

153. ## work

b)5 men can do equal amount of work as 8 women. If 3 men and 5 women combinely do job in 10 days, then how many woman required to finish it in 14 days?

154. ## U.S. Government

I need help answering the following in paragraph form. Which one of these two philosophies do you think the Supreme Court should follow: judicial activism or judicial restraint. I just need help figuring out where to go when answering. Thank you.

155. ## English

1. She will wear a dress to the party. 2. She will wear a dress at the party. (Which preposition is right?)

156. ## physics

If we apply 300 kJ of heat to 2500 moles of air at constant pressure, what is the change in internal energy? Answer a. 214 kJ. b. 100 kJ. c. 180 kJ. d. 75 kJ.

157. ## physics

The natural greenhouse effect raises the surface temperature at the surface of the Earth by about 20 or 40 k?

158. ## implicit diffirentation

y4 + xy = x3 – x + 84 (a) Find dy/dx at the two points on the graph with x-coordinate 0. Hint: Set x=0 in the equation and solve for y to find the two points.

Ryan left musuem and drove south. Gab left 3 hrs later driving 42 km/h to catch up to him. After 2 hrs gab finally caught up. find Ryan's averae speed?

160. ## Maths

Person A has more than \$200 than Person B. Each week, Person A receives \$50 meanwhile Person B receives \$65. When will A and B have the same amount of money?

161. ## Economics

Which government bodies influence national fiscal policies that potentially affect the housing market?

162. ## math

clue#1 You will use exactly eleven base-ten blocks. Clue#2 The number is less than 300. Clue#3 The digit in the tens place is one less than the digit in the ones place. Who am I? Mom of second grader, can't help her with this!! Can you explain how to

163. ## Math Check

2x^2-5x-3/3x^2-5x-2 times 2x^2+11x+5/x^2+3x-10 this is what I have: (x-3)(2x+1)/(x-2)(3x+1) times (2x+1)(x+5)/(x-2)(x+5) How is the answer x-3/3x+1

164. ## English

I'm in 7th grade and I'm doing a lesson plan for the book because of winn-dixie. For the final project I'm going to have students create a diorama that represents the primary or secondary themes in the book. From an adults perspective What do you think the

165. ## geometry

AB is 9cm and AC is 19cm calculate the lenght of BC if the angle is a 90 degress

166. ## physics

My answer for this question A 11.0 kg box is released on a 37 degreesincline and accelerates down the incline at 0.25 m/s^2. What is the coefficient of kinetic friction? My answer was 68.2 and it was incorrect.

167. ## math

about 7/10 of u.s. population in 1991 saying a to be true. What was the total popuation?

168. ## Biology

Are there any viruses/diseases in the tundra?

169. ## Economics

Question 3: Suppose an individual has the following utility over consumption: u(x) = x 1 2 . The individual currently earns \$2,500 per month, which is spent to finance consumption. Suppose the individual is ofered a job with a new internet company. The new

170. ## physics

What dominant mode of heat transport exchanges heat from food in the refrigerator to the cooling coils?

171. ## math

Find the representation of the number 256 in thefollowing bases:a. Base six b. Base twelvec. Base two

172. ## physics

What does the concentration of field lines represent? Answer a. The direction that a positive test charge will be pushed. b. The direction that a negative test charge will be pushed. c. The strength of the force on a positive test charge. d. The strength

173. ## physics

What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron.

174. ## HS Physics

Please help...I know the direction is up, but I can't figure out the magnitude, except that its label is kg · m/s, I think. A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m.

175. ## calculus

If f(1) > 0 and f(3) < 0, then there exists a number c between 1 and 3 such that f(c) = 0. Is this true or false? Please and thank you

176. ## jessie

hi im doing a post lab sheet for chem class. and im having a little trouble. we did an experiment where we put a mixture into a bath and checked to see how long a color would leave from the mixture. i have temperature 12.6 C -> 285.6 K Time 816 sec but im

177. ## Food

Main mineral supplied by dairy products?

178. ## English

Should fact based be hyphnated?

179. ## physics

For my question about the carton's speed must I do each step you laid out or just the last one? I got the wrong answer. Thanks for your help.

180. ## phi 445

diversity may not be as good with less representation in foreign countries. American companies may not want to go into another country if the benefit of cheaper business costs weren't there. How do you think this would effect us?

181. ## Math check

Factor each expression: x^2-144/x+4 times x^2-16/x+12 This is what I got: (x+12)(x-12)/x+4 times (x-8)(x+2)/x+12 How is the answer x^2-16x+48

182. ## Us History

In a well developed paragraph respond to the following. After reading about yellow journalism, explain how the media may or may not influence American foreign policy? Basically, what affect can the media have on the government’s decisions? Be sure to

183. ## Composition

Which topic do you think would be easier to research for an argument essay? Deforestation or Recycling?

184. ## Physical Education

Help I need a mnemonic to remeber the following words Family Peers Role Model Fashion Media Cost Status Disability Age Race Gender Availability Location Access Time Illness Health Problems

185. ## statistics

how do you get thesampling and confidence intervals for this problem sample scores of 1,2,3,4,5 and 95 percent confidence interval about the sample mean

186. ## math

expand and simplify 4(3k-2)+3(4-k)

187. ## Math (surveying)

I am having a really hard time figuring this problem out. I need to see how it is worked. THANKS!

188. ## English

Can you please check if the following corrections are OK? Thank you very much for helping me. 1) I think my socks bring luck. 2) Italian teenagers like wearing large dark shades (better: sun-glasses), designer clothes and baseball caps with a peak (and

189. ## north america

san francisco, california, a country or a city?

190. ## calculus

Find the derivative by the limit process. 6/√(8x)

191. ## Psychology

A decription of the central themes and stratigies ofpositive Psychology

192. ## algebra

Graph -2y-3x>4

193. ## Maths

N and M have annual savings of \$15.00 and \$20.00 respectively. When did they have the same saving amount? If N and M started his job in 2000 and 2002 namely.

194. ## math

Find the range, median, and mode of each set of data and write the question along with the answers in your Math notebook and submit on 13,October 2010. A. 20, 12, 6, 17, 4, and 19 B. 13, 2, 17, 18, and 5 C. 16, 16, 4, 4, 23, 21, and 21 D. 13, 14, 15, 14,

195. ## chem

Name each of the following ionic compounds containing a polyatomic ion. (Type your answer using the format copper(II) chloride for CuCl2.) 1. NaNO3 can u explain? thanks

196. ## college English

Also, had they of done research on wills and added fact based information, than this would have made a crucial impact. Is the writing after "Also" a restritive or nonrestrictive phrase? I think that what is after "also" is restrictive but what is after the

197. ## trig

given cosine (-2/5) and pie

198. ## elementary math

show that 1,078 and 3,315 are relatively prime

199. ## matn

-x=33 The solution is x=

200. ## English

I am writing an essay and looking for some other ways to say however, therefore, and in conclusion. Thanks!!

201. ## prob and stats

–/3 points Notes Question: TanColM7 8.6.003. TKK Products manufactures electric light bulbs in the 50-, 60-, 75-, and 100-watt range. Laboratory tests show that the lives of these light bulbs are normally distributed with a mean of 774 hr and standard

202. ## Chemistry

How many atoms of element "R" are present in 55.80 g of (AH3)4(R2O3)4 (molar mass = 478.17 g/mol)? Please help. I've tried going (g of molecule/mol)x(1 mol of molecule/ 55.80g)but I'm not really sure what to do with this.

203. ## MBA

2. Given a firmï¿½s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 ï¿½ 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes profits

204. ## math

total profit made by McDonald’s in 2002.

205. ## physics

How is entropy calculated in the general case? Answer a. By determining the amount of heat absorbed. b. By multiplying P times Î”V and summing over small increments. c. By summing over momenta and positions. d. By summing over probabilities of

206. ## Chemistry

How do I calculate the solution of Ag(NO3)in Ca(NO3)2?

207. ## pre-algebra

What is the area of a rectangle measuring 1/3 meter by 1/5 meter. Express answer in units squared [meters2]

208. ## J&W

identify the vertex of the parabola y=4x2-40x+96

What recources would be required for establishing a colony in space.

210. ## chemistry

the general chemical form of salicylic acid

211. ## algebra

Find the perimeter of a rectangle if the given base is (x-5)m, and the height is (6x+7)m.

212. ## phi 445

What are the principles behind the ethics of care?

213. ## child development

how to help depressed mothers and babies

214. ## math

write down the value of (4xy) degress

215. ## Math

If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, it height in feet after t second is given by y=95t–16t2. Find the average velocity for the time period beginning when t=2 and lasting i) 0.1 seconds ii) 0.01 seconds

216. ## math

Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).

217. ## Mathematics

If 45 = 2/5 what is 1/5?

218. ## physics

If 250 moles of gas are compressed to 0.75 of an original volume at a constant temperature or 295 K, how much heat must have gone into the environment? Answer a. 176 kJ. b. 205 kJ. c. 112 kJ. d. 122 kJ.

219. ## English

1. The old lady moved me. 2. I was moved by the old lady. (#1 is an active voice sentence. Right? #2 is the passive form of#1? Am I right? Do you use the active form frequently?)

220. ## health

why is it important to consider the components of the social ecology framework in community and public health?

221. ## chem

Name each of the following ionic compounds containing a polyatomic ion. (Type your answer using the format copper(II) chloride for CuCl2.) 1.Sn(SO4)2 thanks

222. ## English

Thank you for your last corrections. Here are some more sentences I'm not sure of. I included the alternatives. 1) I get angry with my brother when he behaves differently from what I expect him to (OR: differently than I expect, differently from expected).

223. ## social studies

can some one help me with the concept of agentification. beacause I had write a paper about the tax aministration which had to become a tax authority. but I had to use the theory of agentification

224. ## Food

main nutrient suppkied by meat and alternatives is carbohydrates?

225. ## Math

How do you factor x^2

226. ## math

what is the mean for 22,22, 23, 25,25,26,26,26,39

227. ## AP Human Geography

identify when the 3 peaks of immigration occures