# Questions Asked onFebruary 2, 2013

1. ## Physics

When a light passes from glass to air, which of the following is correct for the path of the light?

2. ## Probability

if a coin is tossed twice, how many times would the head appear?

3. ## Physics

A 1500 W room heater is used daily for 4 hours during winter. If the cost per kWh is \$0.5, what is the monthly (30 days) expense in using the room heater?

4. ## Physics

A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the direction of the magnetic field of 0.04 Tesla. What is the maximum emf induced in the loop?

5. ## Physics

A capacitor has a charge of 5 µC when charged by a potential difference of 1.5 V. What is the capacitance of the capacitor?

6. ## Physics

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water, (iv) 670-nm-wavelength light

7. ## Math

A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the .99 degree of confidence, what is the confidence interval for the population

8. ## Chemistry Problem

Consider an ionic compound, MX, composed of generic metal M and generic halogen X. The enthalpy of formation of MX is ÄHf° = –457 kJ/mol. The enthalpy of sublimation of M is ÄHsub = 121 kJ/mol. The ionization energy of M is IE = 433 kJ/mol. The

9. ## math

A cliff on the bank of a river is 300m high if angle of deprssion of a point on the oposite side of the river is 60 digree find the wigth of the river

10. ## chem

The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 10-2 s-1. (a) If we begin with an initial SO2Cl2 pressure of 425 torr, what is the pressure of this substance after 74 s? what

11. ## Physics

Two positive charges of 6 �C are separated by a distance of 50 cm in air. What is the electric field strength at the midpoint of the line joining the charges?

12. ## Physics

A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron? Thanks for helping me out

13. ## Physics

A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100 m/s. What is the force experienced by the proton if it enters parallel to the direction of the magnetic field with a speed of 200

14. ## math

franklin school has 3 boys for every 4 girls in the fifth grade.there is 140 students in the fifth grade. A. how many are boys and how many are girls??? pleassseee helpppp meeeeee!!!!

PLEASE HELP I REALLY NEED HELP. Each of the three circles in the figure below is externally tangent to the other two, and each side of the triangle is tangent to two of the circles. If each circle has radius three, then find the perimeter of the triangle.

16. ## a&p

In modern blimps, the gas of choice is used to inflate them is helium is safer. Compare and contrast the atomic structure of hydrogen and helium. What characteristics of the atomic structure of helium make it so much less reactive than hydrogen?

17. ## biology help plz?????????????????

the mRNA squence below is shown along with the polypeptide which would be produced when it is translated .what polypeptide would be produced if the fifth base in the mRNA sequence shown had been changed to A as result of a mutation in the DNA from which

an example of parallelism and page in to kill a mockingbird

19. ## ELAPSED TIME

How long did John sleep if he went to bed at 9:40 P.M., and got up at 7:20 A.M.?

20. ## Physics

Give one block a small initial displacement and the other block a larger one. Click start, and watch the animation. Then select each statement below that is true.

21. ## calculus

Using an upper-case "C" for any arbitrary constants, find the general indefinite integral ∫ (-2-t)(-9-t^2) dt Now I multiplied both parentheses to get: ∫ (18 + 2t^2 + 9t + t^3) dt now I integrated and got: 18t + 2t^3/3 + 9t^2/2 + t^4/4 + C but I'm told

22. ## a&p

How does ATP supply the cells with the energy they need to work? Outline the general scheme of the ATP energy cycle.

23. ## math

A company uses the function C(x)= 20.50x+2000, where C is the cost and x is the number of units it produces, to determine its daily costs. Find the inverse of the function and determine how many units are produced when the cost is \$625,000.

24. ## history

what was necessary for the united states to be able to increase its production of war materials in a short period of time?

25. ## Chemistry

Can someone pls help me!! You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A. What would be the boiling point of water in A ? What would be the

26. ## Physics

A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that acts perpendicular to the flow of current in the conductor?

27. ## History

The first European power to explore the coast of West Africa was A. England B. Portugal C. Holland D. France

28. ## physics

Tarzan swings through the jungle by hanging from a vine. At the lowest point of a swing, Tarzan's acceleration is.... A. zero B. not zero C. one cannot be sure whether it's zero or not zero without additional information.

29. ## Calculus

Find the equation of the tangent line to the curve y=2sinx at the point ((pi/6), 1). The equation of the tangent line can be written in y=mx+b form, where m=sqrt3. What is b?

30. ## Chemistry

Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.

31. ## Chemistry

A vinegar sample is found to have a density of 1.006 and to contain 4.7 acetic acid by mass.How many grams of acetic acid are present in 3.00 of this vinegar?

32. ## English

In the Adventures of Huck Finn DISCUSS TOM'S RESPONSE WHEN THE REAL TOM SAWYER ARRIVES. WHO DOES TOM PRETEND TO BE?

33. ## bussiness law

identify and protect the tangible property rights of walmart (retail) relating to discriminatory issues and the associated legal considerations. I have searched Google and my book and I can not find this. PLEASE HELP

34. ## PHYSICS

A block with mass m1 = 9.0 kg is on an incline with an angle θ = 32.0° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: μk = 0.28 and μs = 0.308. To keep the

35. ## a&p

If an adult has a body weight of 170 pounds, how much of that weight consists of water.

36. ## Chem Help!!

The volume of a red blood cell is about 90.0*10^-12cm^3 Assuming that the red blood cells are spherical, what is the diameter of a red blood cell in millimeters?

37. ## maths

If the weight of a spherical shell is 7/8th of what it would be if it were a solid shell, find the ratio of the inner and outer radii of the shell.

38. ## Physics

A boat which travels 100 km (N), then 40 km (N), and finally 80 km (S). The entire trip takes 6.5 hours. A.) Calculate the total displacement of the boat B.) calculate the velocity of the boat

39. ## Temperature Problem

Q: A reaction rate has a constant of 1.23 x 10-4/s at 28 degrees C and 0.235 at 79 degrees C. Determine the activation barrier for the reaction. A: My work thus far: ln(1.23 x 10-4/0.235)=(Ea/8.314)(1/301.15-1/352.15) -7.551=(Ea/8.314)(0.0048090535)

40. ## English

Where reading the poem "LEGAL ALIEN" by Pat Mora . We have to find the rhythm,meter, and assonance . I cant fimd any of that in the poem . Please tell me what each one of them are in the poem .. Reply ASAP please

41. ## thermodynamics

equal to 1/4 th of the heat rejected to the sink. the efficiency of the engine is

42. ## history

why did the national debt rise so quickly during world war 2?

43. ## history

what do you think contributed to the jump in productivity among american workers during world war 2?

44. ## college algebra

Slope intercept Vertical, passing (5,-1) Do you solve like this? M1= m/5-5m M=5

45. ## physices

A simple pendulum is made from a bob of mass 0.04 kg suspended on alight string of length 1.4m. Keeping the string taut, the pendulum is pulled to one side until it has gained a height of

46. ## algebra

how to solve the formula for the indicated letter for x= w + y + z/4 for y

47. ## Travel tourism

describe tourism

48. ## Chemistry

A gas occupies a volume of 502 cm3 at 20.0 C. What will be its volume at 106 C? I understand that it follows Charles' Law where the correct equation is V1/T1=V2/T2. My teacher expects all units of volume to be converted to Liters and all temperature to

49. ## basic college math

write 14.825 as a faction

50. ## PHYSICS

Two capacitors are connected to a battery. The battery voltage is V = 60 V, and the capacitances are C1 = 2.00 μF and C2 = 4.00 μF. Determine the total energy stored by the two capacitors when they are wired (a) in parallel and (b) in series.

51. ## math

if i have a phone card with 15 doloars on it and it is 7 cent a min i use the ohone once and have a balance of 13.25 how many mins was i on the phone

52. ## History

The advantage of the Phoenician system of writing over the Chinese, Sumerian, and Egyptian was that it (a) used fewer sounds (b) used fewer pictures (c) used fewer symbols (d) none of the above

53. ## college algebra

Direct variation Find y when x=5, if y=7 when x=14 I think the answer is 2.5 but don't know for sure:-)

54. ## math

one elevator leaves first floor of a building at 9:00 a.m. It takes 5 seconds to travel between floors, stays 10 seconds at each floor and stops at each floor on its way to the top. Another elevator leaves the 12th (top) floor at 9:00 a.m. ; it takes 5

55. ## Chemistry

You have a 100mL cylinder containing 40mL of water. A cube measures 2cm on each side is lowered into the cylinder. What is the new volume reading of the cylinder?

56. ## statistics

Suppose 1,600 of 2,000 registered voters sampled said they planned to vote for the Independent candidate for president. Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?

57. ## Math

A circular table has a diameter of 48". The table can be enlarged by inserting two rectangular leaves, each 18" wide and 48" long. What is the area of the expanded table?

58. ## math

I have a question is this cheating when we ask questions from our school work ? Wouldn't our on line school know we are kids are doing this ? What is an ethical homework question ? Curious..

59. ## Math

Graph the polygon and give the specific name for the polygon. A(-1,-2),B(0,3),C(1,-2)

60. ## Math

What is the best estimate for the height of the basketball net ? A - 6 feet B - 6 yards C- 16 feet D - 60 yards Which is the best estimate for the width of a classroom ? A- 4 feet B- 4 yards C- 40 yards D - 400 feet

61. ## math

please help. what is the probability that when you pick two cards, you will select at least one king out of two in a deck of six standard cards? (assuming there are no jokers)

62. ## Math

rename or simplify as needed 11 1/4 - 5 8/9

63. ## math

average daily balance . find the credit card finance charge for the month of august (31 days) the annual interest rate is 18% July 31 balance \$510 August 9 charge \$86 August 10 payment \$390 August 22 charge 147 August 27 charge \$14

64. ## Physics

The second harmonic of a guitar string has a frequency of 120 Hz. What is the length of the guitar string if the speed of the waves on the string is 110 m/s?

65. ## math

n points are arranged on a cirlce and all the chords drawn. Let I(n) be the number of intersection points inside the circle if no 3 chords are concurrent. Find a formula for I(n).

66. ## Calculus

f(0)=7, g(0)=5, f'(0)-=-12, and g'(0)=5. Find h'(0) for the function h(x)=f(x)/g(x)

67. ## college algebra

Find y when x=1/2, if y=3/2 when x=10 How do you work this?

68. ## math

7 2/5 - 2 3/4 = I need to show how I got the answer

69. ## science

"Reproductive cells and somatic cells are not separated early in development, as they are in animals。 Instead, plant somatic cells that have undergone many rounds of mitosis can undergo meiosis and produce gametes." This is said in my notes under

70. ## Chemistry

54.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration?

71. ## Physcs

A two-slit pattern is viewed on a screen 1.17 m from the slits. What is the width of the central bright fringe, if the third dark fringes on either side are 26.4 cm apart?

72. ## math

if you are making 34 trophies plates that 3 1/4" long and 1" wide what size sheet of brass would be needed if plates are aligned with 2 plates per horizontal line

73. ## Calculus

f(x)=(5x)/(1+2x^2). f'(4)=-75/289 f'(x)=(5-5x^2)/1+2x^2+x^4) Use this equation of the tangent line to the curve y=5x/(1+x^2) at the point (4, 1.17647). The equation of the tangent line can be written in the form y=mx+b. m=-75/289. What is b?

74. ## Physics

A total of 100000 kg of water per second flows over a waterfall 30 m high. If half of the power this flow represents could be converted into electricity, how many 100 watt lightbulbs could be supplied?

75. ## MATH

I need help idk how to do this... Select the measure of the complement or supplement of the angle. If there is no complement or supplement, select no complement or supplement. 55.1° (1 point) 124.9° 119.9° 49.9° no complement or supplement

76. ## Chemistry

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A. What would be the boiling point of water in A ? What would be the temperature of absolute zero

77. ## System Analyst and Design

Terrier News Situation: Terrier News is a monthly newsletter devoted to various breeds of terriers and topics of interest to terrier owners and breeders. Annie West, the editor and publisher, asked you to help her design a system to enter and manage the

78. ## biology help plz?????????????????

product of The oxidative phosphorylation / electron transport is ? in stage of glucose oxidation a)pyruvate b)oxygen c)water d)NAD e)ATP f)NAD.2H g)carbon dioxide h)ADP CHOSE TWO ANSWER FROM THE FOLLOWING LIST product of Glycolysis is? a)pyruvate b)oxygen

79. ## Physics

Classify the following measurements as scalar of vector quantities. A.) 15 s B.) 4.2 m ( up) C.) 100 km/h (S) D.) 2.8 kg

80. ## Analytical chemisty

How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?

81. ## maths

1) find the mean number of heads in 3 tosses of a fair coin?

82. ## human resources

what is stihl inc usa SWOT?

83. ## Math

Which of the following expressions is the simplified form of -8+3(2p-4)+10p ? A. 16p-20 B. 8p-10 C. 6p-12 D. 12p-9

84. ## basic college math

what is 4/13 written as a decimal?

85. ## Physics

A watermelon cannon fires a watermelon vertically up into the air at a velocity of +11.5 m/s, starting from an initial position 1.20 meters above the ground. When the watermelon reaches the peak of its flight, what is (a) its velocity, (b) its

86. ## Soc

In Turkey, putting your hands in your pockets is considered disrespectful. Therefore, this particular behavior is deemed inappropriate when evaluated in this

87. ## History

The Soviet Leader who did the most to end the Cold War was which of these? A. Joseph Stalin B. Nikita Khrushchev C. Leonid Brezhnev D Mikhail Gorbachev

88. ## math

425 in tickets were sold they were either adults or students tickets the number of student tickets were sold was three times the amount of adult ticket sold how many adult tickets were sold

89. ## Fractions

Eighty people were invited to vote in the extension club's elections and 9/10 of them voted. How many people voted in the elections? 74, 73, 72, 75 My answer is 73

90. ## math help now please

If a figure is a rectangle ABCD and the measure of angle ABD is 35 degrees what is the measure of the angles ABD CBD and BDC

91. ## math,probability

Hi, I don't understand a homework question, can anyone please help me? I'm bad at probability. what is the probability that when you pick two cards, you will select at least one king out of two in a deck of six standard cards? (assuming there are no

92. ## Physics

webassign(.)net/yf/22-30.gif The image above shows some of electric field lines due to 3 poin charges along the vertical axis. All 3 charges have the same magnitude. A. What are the signs of the 3 charges? Explain reasoning. B. At what points is the

93. ## college general chemistry

Calculate the volume of a rectangular solid with a thickness of 0.750 cm and an area of 8.25 cm2

94. ## chemistry

how many grams of magnesium are required to react with 2.0 moles of hydrochloric acid?

95. ## english

i need help, i am writing a paper on gay marriage. I need to write a compound-complex sentence on it too. help!

96. ## English

I am categorizing files by numbers. But I have a couple of files w/o #'s. Then what 1 label would I give these group of files? Ex: # Unknown...

97. ## math

4 5/8 + 9 3/5 = rename or simplify as needed

98. ## math

Generalize the pattern for the division of (x^n)-(y^n) by x-y

99. ## Physics

Two resistors 10 Ù and 5 Ù are connected in parallel across a 15 V battery. What is the potential difference across the 10 Ù resistor? Which formula do I use?

100. ## math

how many combinations can you get with 18 flavors of ice cream and 70 toppings?

101. ## chemistry

Classify each of the follow species as bronsted lowry acid or base NH3,NCN

102. ## chemistry

Write the formula of the conjugate acid of base HCO3-,HPO2-,PO43-,SO32-

103. ## Math

A club is selling mugs with three different sports logos. The club sold 2(4m-25) football mugs, 2(4m-15) basketball mugs, and 4m+38 soccer mugs. Which expression represents the total number of mugs that the club sold? A. 18m-57 B. 18m-2 C. 16m-57 D. 15m+3

104. ## Calculus 2

I have this integral that I don't know how to solve: ∫ (x-3)/sqrt(x) Would I multiply both parentheses first? or just turn it into (x-3)(x^-0.5)?

105. ## Chemistry

The density of aluminum is . A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573 .What is the thickness of the foil, in millimeters?

106. ## Chemistry

At 1 atm, how much energy is required to heat 67.0 g of H2O(s) at –14.0 °C to H2O(g) at 115.0 °C? Please explain, I'm not very good at Chemistry and this problem is giving me a headache. Thank you!

107. ## math

what is the math trivia of direct square variation?

108. ## Statistics

Accidents on a bike path. Examining the location of accidents on a level, 5-mile bike path shows that they occur uniformly along the length of the path. Figure 3.4 displays the density curve that describes the distribution of accidents. (a) Explain why

109. ## Enlgish

How do you solve 7√3 + √3? I really need help.

111. ## maths

I don't understand how 4root(t cubed) is 4t power (3/2)

112. ## legal and ethics laws

the ethical implications of committing an intentional or quasi-intentional tort

113. ## math

find n(A)for each set A={1/2, -1/2, 1/3, -1/3,..., 1/10, -1/10}

114. ## Chemistry

You have 1.0 mol of HCL and you want to dilute it to .1 mol. How many mL out of 50 should it take up?

115. ## Chemistry

In the case of a small amount of your unknown failed to dissolve in the t-butanol, would it effect the molar mass? = Does molarity increase as molar mass increases?

116. ## investing

A company is thinking of investing some surplus cash in 30 year \$1000 face value Microsoft 6% annual coupon bonds. It plans to pay \$925 each for 10,000 of them, now, and expects to SELL them for \$1025 each at the end of 5 years. Make a determination about

117. ## Chemistry

In the situation that a solute dissolves in a solvent, the solute molecules often dissociate and associate. Studying for exam, not sure how to explain HOW dissociation and association affects the molar mass of the solute in this system. (What is

118. ## math and litetature

Just wanted to say thank you to all of you for helping us. Helping us understand when we can't get help anywhere else any time. So, thank you. A student

119. ## chemistry help !!!!!!!!!!!!!!!!

complete the following paragraph relating to the enzyme,b -galactosidase .this enzyme hydrolyses the disaccharide lactose to constituent monosaccharides ,galactose and glucose ,drag and drop the approprite words into the correct space. the enzyme

120. ## maths-urgently needed-plse help

A manufacturer lists the price of the goods at Rs.240 per article. The wholesaler ge6ts a discount of 25% on the goods from the manufacturer. The retailers are allowed a discount of 15% on the list price by the wholesaler. The prescribe rate of sale tax at

121. ## chemistry help !!!!!!!!!!!!!!!!

complete the following paragraph relating to the enzyme,b -galactosidase .this enzyme hydrolyses the disaccharide lactose to constituent monosaccharides ,galactose and glucose ,drag and drop the approprite words into the correct space. the enzyme

122. ## Calculus Help?!?!

Megan bailed out of her plane at an altitude of 8000 feet, fell freely for 15 seconds, and then opened her parachute. Assume that the drag coefficients are a=0.1 for a free fall and a=1.6 with a parachute. When did she land(in seconds)?

123. ## trigonometry

what is the graph of y= cos2(x-pi)+2

124. ## trigonometry

what is the graph of y= tan(2x-pi)

125. ## trigonometry

what is the graph of y=sec(x+pi/2)

126. ## trigonometry

what is the graph of y= arccos(x-2)

z(-3)

z(-3)

129. ## math

Three people are to be selected at random, each will be given one gift card. There is one card from Home Depot,one from Best Buy and one from Red Lobster. The first person selected will get to choose between the two remaining cards. The third person

130. ## math

an airplane is flying at a height of 2 miles above the level ground. the angle of depression from the plane to the foot of a tree is 15 degree. Find the distance that the plane must fly to be directly above the tree.

131. ## physics

An object is dropped from ret from a height of 39.4m. What is its average acceleration (assumed to be constant) if it hits the ground with a speed of 1.61m/s? My quesion is, is a not 9.8 since gravity is acting on the object.

132. ## math

please give me algorithm how to solve the lim sqrt(tan(0.25ïx))^(1/(x^2-1)) x->1

Prove that no isosceles right triangle exists whose sides are integers.

134. ## biology

What is the scientific reason to the larger population of females than males in countries in relation to chromosomes?

135. ## math

Find the function g, given that g is linear, the graph of g has y-intercept -2. And g(1) =5.

136. ## economics

If the government imposes a quantity tax on the consumption of a good, it means that the consumer has to pay for each unit of the good its price plus the tax. For example, if the price of a chocolate bar is \$5 and the government imposes a tax of 20 cents

137. ## MATH - immediate help needed!

Please provide the solution to the below problems: In a certain state lottery, a player selects four different numbers from 1 through 30. Find the probability that a single choice of four numbers wins the lottery, assuming the order of the numbers is not

138. ## Math(Trigonometry)

kos^2 theta - sin^2 theta = 0.25

139. ## maths

find shortest distance between the line : (x - 8)/ 3 = (y + 19)/-16 = (z - 10)/ 7 and (x - 15)/ 3 = (y - 29)/8 = (z - 5)/ -5

140. ## Science

Describe the movements of particles in a cold glass as thermal energy is transferred to it from warm hands?

141. ## a&p

How would you contrast single convalent bonds, double covalent bonds, ionic bonds?

142. ## maths

the points A(2,3) B(4,-1) C(-1,2) are the vertices of a triangle. find the length and perpendicular from A to BC and hence the area of ABC

143. ## alg 7

A triangle with 3 sides all differnt- 19.5, 32.5, 26. What is the area? I don't even know the formnula

144. ## science

Sky-High Internet Services Situation: Sky-High Internet Services is a leading Internet service provider in a metropolitan area. The new customer billing system has caused an increase in complaints. Tammy Jones, the office manager, asked you to investigate

145. ## Math

a square pizza measuring 8 inches by 8 inches that costs \$10 or a round pizza with a 9 inch diameter that also cost \$10

146. ## System Analyst and Design

Sky-High Internet Services Situation: Sky-High Internet Services is a leading Internet service provider in a metropolitan area. The new customer billing system has caused an increase in complaints. Tammy Jones, the office manager, asked you to investigate

147. ## english

in to kill a mockingbird what is an xample of an alliteration

148. ## Web Design and Development

Explain how an affiliate program works as both an advertising program and a revenue generation program; give two real-world affiliate program examples.

149. ## Web Design and Development

Social media is a good method for promoting a published Web site or business. Find two examples of companies who are using social media and interactive Web tools, or blogging to reach their customers. Write a brief summary that describes the methods being

150. ## Science

Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement best describes what has happened? A. Energy has been created in the form of thermal energy B. Energy has been transformed

151. ## algebra 2

to solve the system of equations which expression could be substituted for x into the first equation? first: 2x+7y=10 second: x-2y=15

152. ## algebra

division equation 128/n=8

153. ## Computer

Write a pseudocode to input 10 temperatures per day for 20 days and output the average per day and the average for the 20 days.

154. ## Physics

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the

155. ## Physics

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the

156. ## physical science

A man pulls a lawnmower with a mass of 50 kilogram accross a lawn, its pulling force is 400 newtons at angle of 50 degrees with a horizontal line.(a) resolve the force into two components , one parallel to the ground and one perpendicular to the ground

157. ## Physics

Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the

158. ## Math

If 4 is added to the numerator & denominator of 5/7, by how much is the fraction increased? Please show solution.. thanks

159. ## Physics

A cheetah can run with a speed of 29 m/s. Determine the distance travelled by a running cheetah in 8.6 s

160. ## Physics

In the human body, blood travels faster in the largest blood vessel, the aorta than in any other blood vessel. Given an average speed of 30 cm/s, how long would it take the blood to travel 5 cm?

161. ## Physics

what is the final temperature of mixture, if 100gm of ice at 0 degree celcius into 100gm of water at 20 degree celcius in an iron vessel of mass 100gm.(specific heat of iron=0.1)

162. ## Corrected Temperature Problem

Q: The activation energy of a certain reaction is 32.9 kJ/mol At 25 degrees C the rate constant is 0.0160 units s-1 units. At what temperature in degrees Celsius would this reaction go twice as fast? My work: ln(0.0160/0.032) = (32,900/8.314)(1/T2 -

163. ## science

how many ions of potasium are there in 4.2vgrams of K3PO4 (molar mass=212.264g/mol )

164. ## Physics

During the second stage of a rocket launch the rockets upward velocity increases from 980 m/s with an average acceleration of 33 m/s (upward). How long did the acceleration last?

165. ## math

For f={(-4,4),(-2,4),(1,3),(3,5),(4,6)} and g={(-4,2),(-2,1),(0,2),(1,2),(2,2),(4,4)} Find a) f+g b) f-g c) g-f d) fg

166. ## math

If f(x)= x^2-4 and g(x)= 2x-7 Find a) f(g inverse(x)) b) g((g)inverse(x))

167. ## Life Orientation

What can one do to deal with unethical behaviour.Name 4 actions to take

168. ## math

Find the image of (3,-4) corresponding to y=f(x) if it undergoes the following transformations. a) 3f(x-2)+6 b) -f(-x+4)-2 c) f(3(x+2))

169. ## math

n points are arranged on a cirlce and all the chords drawn. Let I(n) be the number of intersection points inside the circle if no 3 chords are concurrent. Find a formula for I(n).

170. ## math

f(x)=x^2-mx+5 and g(x)=nx^2+x-3. The functions are combined to form the new function h(x)=f(x)+g(x). Points (1,3) and (-2,18) satisfy the new function. Determine the values of m and n.

171. ## World History

Arabs are joined together through (a) kinship through a male line (b) arranged marriages (c) kinship through a female line (d) agreements by kings

172. ## JD

Find the slope of the line passing through the points (0, -4) and (-6, 7).

173. ## math

For the function f(x)= {x^2, if x than or equal to 1. Is f(x) continuous at x=1. Explain.

174. ## math

Describe the sequence and types of transformations required to transform the graph of y=x^3 into the graph of y=2f{-2(x-1)}+4. Give the equation of new transformed function with detailed explanation.

175. ## math

cos^2 theta - sin^2 theta = 1

176. ## World History

During the European medieval period, there was no strong centralized government. However, advances were made in the areas of (a) art, science and communication, (b) agriculture, technology and ship design (c) medical knowledge (d) all of the above

177. ## college algebra

Write slope-intercept equation Passing through the points (-6,-9) and (0,8) I think it's this just making sure: M=(8-(-9))/(0-(-6)) =17/6 Y= -17/6x+36/6 Y=-17/6x-6 M=17/6 and Y=-6

178. ## analytical chemisty

Consider the standardization of a solution of K2Cr2O7 with iron metal according to the following: Reaction: Fe + Cr2O7-2 → Fe +3 + Cr+3a. How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution? What is the exact normality of the

179. ## physics

This is my problem: A particle with a density of 0.9g/ml is suspended in a solution that has a density of 1.1g/ml. It cannot be sedimented. Using the equation that describes the movement of a particle in a centrifugal field, describe why this is true. The

180. ## math

The population of a slow growing bacterial culture can be represented by the function P(t)=t^2-0.7t+10, where t is measured in seconds. a) Determine the populations of bacteria at 2.5 seconds. b) Determine the average rate of change in the bacteria

181. ## Chem Help!!

A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to 3.00in. The density of the steel is 7.70g/cm^3. How many inches long must the section of bar be?

182. ## World History

The person who might be called the "father of the hydrogen bomb" is (a) Enrico Fermi (b) Robert Oppenheimer (c) Niels Bohr (d) Edward Teller

183. ## Question

I am categorizing files by numbers. But I have a couple of files w/o #'s. Then what 1 label would I give these group of files? Ex: # Unknown...