# Questions Asked onNovember 19, 2012

1. ## Math

Which of the images above represents a proof of the Pythagorean Theorem? Explain your choice, and then explain how the figure proves the Pythagorean Theorem.

1. The price of a radio changes from $40.00 to$44.00. (1 point) 10% decrease 10% increase 36.4% decrease 40% increase 2. The price of an oven changes from $450 to$396. (1 point) 13.6% increase 13.6% decrease 12% increase 12% decrease 3. The top

3. ## Physics

An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch

4. ## Chemistry

If argon has a volume of 5.0 dm3 and the pressure is .92 atm and the final temperature is 30 degrees celcius and the final volume is 5.7 L and the final pressure is 800 mm Hg, what was the initial temperature of the argon?

5. ## physics

a longitudinal wave with a frequency of 3.0 Hz takes 1.7 s to travel the length of a 2.5-m slinky (see figure 16.3). Determine the wavelength of the wave.

6. ## chem

The molar concentrations for the reactants and products at equilibrium are found to be [HCl] = 0.80 M, [O2] = 0.20 M, [Cl2] = 3.0 M, and H2O = 3.0 M. What is the value of the equilibrium constant for this reaction? the complete reaction is

7. ## Physics

A refrigerator has a coefficient of performance of 4.0. When removing 2.4x10^4 J from inside the refrigerator, how much energy is sent into the environment?

8. ## english

1. Why do the sorceresses agree to kill Sunjata? (1 point) Sunjata declined his father's cows. Sunjata had befriended Jelimusoni Tunku Manyan Diawara. Dankaran Tuman's offer was better than Sunjata's. Dankaran Tuman had promised them a bull. 2. Why do the

9. ## Math

Paul is painting a square wall with an area of 115 square feet. To the nearest foot, what is the length of the wall? Hint: A = s2. 11 29 42 58

10. ## Physics

A couch with a mass of 100 kg is placed on an adjustable ramp connected to a truck. When one end of the ramp is raised, the couch begins to move downward. If the couch slides down the ramp with an acceleration of .7 meters per second when the ramps angle

11. ## Physics HELP!

The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find (a) the period of this motion (b) the frequency of the motion (c) the amplitude of the motion (d) the first time after t=0 that

12. ## English Ms. Sue

10. I have run for this track team for eight years. (HAVE RUN is underlined) Possible answers: A.) present perfect tense B.) past perfect tense C.) future perfect tense I think it is A.

13. ## chem

4HCl+O2=2Cl2+H2O Detremine the Kc expression for the reaction above by identifying what belongs in the numerator and what belongs int he denominator? pls do help trying to understand the concept but still confused.

14. ## Physics

Sukey is riding her bicycle when she sees a fallen tree 42 m ahead. If the coefficient of friction is .36 and she is travelling at 50 km/ hr and she and the bike have a mass of 95 kg, how much stopping distance does she need. I got as far as her speed

15. ## Chemistry

Can someone help draw/explain the Lewis Dot Structure for OPBr3. I've tried different things, but none of them seem to work.

16. ## chem

When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?

5. Sara raised her score on a math test from 86 to 94. Max changed his score on the test from 77 to 85. Who had the greater percent change? (1 point) A. They both had the same percent change. B. Max’s percent increase was about 1.1% more than Sara’s.

18. ## mechanics

A uniform solid sphere rolls down an incline. What must be the incline angle (deg) if the linear acceleration of the center of the sphere is to have a magnitude of 0.16g?

19. ## Physics

The surface of the Sun is approximately 5700 K and the temperature of the Earth's surface is about 290 K. What total entropy change occurs when 1000 J of heat of energy is transferred from the Sun to the Earth?

20. ## Physics

In a very busy off-campus eatery one chef sends a 241-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.53 m/s. Almost simultaneously, the other chef launches a 321-g veggieburger-on-a-bun (with everything, but

21. ## Chemistry

Which do not obey the octet rule? Check all that apply. NO BF3 ICl2^- OPBr3 XeF4 An explanation would be appreciated, thanks.

22. ## Physics

A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 56° with the horizontal. The coefficient of static friction between the ladder and the ground is 0.36. If your mass is four times that of the ladder,

23. ## Math

Thinking about the different types of numbers you learned in this unit, how would you help someone remember the differences between rational and irrational numbers? Remember to mention some of the Key Words from your lessons

24. ## CHM formula needed, pls?

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.

25. ## English ms. sue

ms. sue for the article an ode to user friendly pencil i need to write thematic statement, but i not sure what to exactly say about it, cause its just about the author being ironic and making a point. also ms. sue do the title be ironic as well because

26. ## math

Jonah and his friends go apple picking. Jonah fills 5 baskets. each basket holds 15 apples. if 4 of jonahs friends pick the same amount. how many appples do Jonah and his friends pick in all? please help solve this problem?

27. ## Statistics

Over time, a student analyzes her ability to guess correctly after narrowing down multiple choice answers in a 5-selection question (a through e). She discovers that if she narrows her answers to 2 or 3 choices, her probability of getting the right answer

28. ## Physics

An electrical generating plant operates at a boiler temperature of 220 deg C and exhausts the unused heat into a nearby river at 18 deg C. what is the maximum theoretical efficiency of the plant?

29. ## chem

a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting

30. ## English-Grammar

The underlined words (I put them in parantheses) are an example of a(n) ___________. (When the earth, moon, and sun are in line), an eclipse occurs. A. adverbial clause B. adjectival clause C. noun clause My answer is C.

31. ## chem

PCL5=PCl3+Cl2 a. Initially 0.72 mole PCl5 are placed in 1.50 L flask. At equilibrium, there is 0.16 mole PCl3 in the flask. What is the equilibrium concentration of the PCl5? b. What is the equilibrium concentration of the Cl2? c.What is the equilibrium

32. ## Chemistry

In an experiment, 0.0300 moles each of SO3(g), S02(g), and O2(g) were placed in a 10.0L flask at a certain temperature. When the reaction came to equilibrium, the cocentration of SO2(g) in the flask was 3.50x10^-5 molar. What is Kc for the reaction?

33. ## Physics

A thrill-seeking cat with mass 4.00 kg is attached by a harness to an ideal spring of negligible mass and oscillates vertically in SHM. The amplitude is 0.050 m, and at the highest point of the motion the spring has its natural unstretched length.

34. ## Biochem

A buffer solution is prepared by mixing 200 mL of 0.2 M salt solution and 400 mL of a 0.2 M acid solution. What is the concentration of the resulting buffer? ~what is the pKa?

35. ## Physics

A cat chases a mouse across a 1.1 m high table. The mouse steps out of the way, and the cat slides oﬀ the table and strikes the ﬂoor 2.2 m from the edge of the table. The acceleration of gravity is 9.81m/s^2. What was the cat’s speed when it slid

36. ## Physics

A sled is pulled across a horizontal snow surface with a constant velocity. The force being applied is 80 N at an angle of 53 degrees to the ground. What is the magnitude of the force of friction of the snow acting on the sled?

37. ## chemistry

Would a damp filter paper affect the theoritical yield, calculated actual yield and calculated percent yield. Please help. Chemistry is hard.

38. ## math

The daily total cost (in dollars) incurred by Trappee and Sons for producing x cases of TexaPep hot sauce is given by the following function. c(x)=0.000002x^3+3x+453 (a) Find the average cost function C. C = ? (b) Find the level of production that results

39. ## Math

What is the sqaure root of thirty six over forty nine?

40. ## Physics

An open train car, with a mass of 2150 kg, coasts along a horizontal track at the speed 2.29 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 2.67 s at the rate of 441 kg/s. What is the car's speed after the

41. ## Physics

Football is kicked up into the air with a velocity of 20m/s. a. Determine the time the football is in the air. b. Determine the maximum height the football would reach. c. As the ball is kicked it encounters a weird horizontal wind that gives it a velocity

42. ## CHM

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol. Need the formula to understand how to continue with more problems.

43. ## chemistry

472 mL of H2 gas was collected over water when 1.256 g of Zn reacted with excess HCl. The atmospheric pressure during the experiment was 754 mm Hg and the temperature was 26 degrees C. A. Write the balanced chemical equation (I have this) Zn + HCl --->

44. ## chem

How much heat (in {kJ}) evolves when 7.0L of C2H2(d = 1.0967kg/m^3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2+ 5/2 O2-> 2 CO2+ H2O, Delta H=-1299.5 kJ

45. ## science

A car travels 5km to east. Then it goes 3km to north and then 2km to west. What is the displacement the car has traveled?

46. ## Math

The daily total cost (in dollars) incurred by Trappee and Sons for producing x cases of TexaPep hot sauce is given by the following function. (a) Find the average cost function C. C = ? (b) Find the level of production that results in the smallest average

47. ## Physics URGENT!!!

A spring of negligible mass stretches 2.14 cm from its relaxed length when a force of 8.40 N is applied. A 1.300 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin

48. ## math

4002-2153=1849 how is regrouping thousand shown in the problem above

49. ## math

show me how to do 400 divided by 43.18=

50. ## math

A right circular cylinder has a diameter of 16 mm and a height of 12 mm. What is the surface area of the cylinder?

51. ## financial accounting

eckman company purchased equipment for $80,000 on january 1,2011 and will use the double declining balance method of depreciation. it is estimated that the equipment will have a 5 year life and a$4,000 salvage value at the end of its useful life. the

52. ## Physics

A person consumes 2500 kcal/day while expanding 3500 kcal/day. In a months' time, about how much weight would this person lose if the loss were essentially all from body fat? (Body fat has an energy content of about 4100 kcal per pound).

Which of the following comparisons between Mexico's coastal areas and its heartland is accurate? a. The heartland gets very little rainfall, while the coastal areas get a great deal of rain. c. The coastal areas are devoted to tourism, while the heartland

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54. ## Chem

When 25.0g of Zn reacts with Hcl, how many L of H2 gas are formed at STP?

55. ## physics 209

A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg⋅m2 and radius R = 10cm. There is friction in the pulley. The mass is dropped from rest, and after 2s it traveled 0.4m. What is the torque due to friction?

56. ## Physics

A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.430 kg ball precisely at the peak of his jump, when he is 19.2 inches off the ground. He hits the ground 1.61 inches away from where he

57. ## Math

Jennifer plans to fence a rectangular area around her rectangular swimming pool. The total area enclosed by the fence, including the pool, should be 5 times the area of the pool alone. The pool is 20 feet by 17 feet. A.)What is the total area enclosed by

58. ## Physics

9. In which system is heat usually transferred from the cooler part to the warmer part? a. A stove as it heats up water. b. A refrigerator that is running. c. An electric fan that is running. d. None of the above, because it is impossible to transfer heat

59. ## Chemistry

Balance the following equations for a half reaction that occurs in a acidic solution A) ClO3- --> Cl2 B)H2BO3- -->BH4- C) MnO4- + HNO2 -->NO3- +Mn2+

60. ## EARTH SCIENCE

You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located

61. ## Physics

A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the

62. ## Grammar

Choose the correct sentence. A) Her and I are going to be good friends. B) She and I are going to be good friends. I answered B

One challenge faced by people living in Mexico’s heartland region is __________________. a. the threat of hurricanes c. the threat of earthquakes b. the threat of typhoons d. the threat of tornadoes A or C? I'm not sure

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64. ## Chemistry

How many grams of I2 are present in a solution if 38.55ml of 0.160M Na2S2O3 solution is needed to titrate I2 the solution?

65. ## Physics

During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 148-g baseball crashing through the pane of a second-floor window in a nearby building. The ball strikes the glass at 10.1 m/s, shatters the glass as it passes through,

66. ## trigonometry

Been trying this forever so it says: Simplify 1+sin2x+cos2x/1+sin2x-cos2x ive tried this problem so many times I need help with it...

67. ## physics, university

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of

68. ## Intermediate Algebra

A model rocket is launched from a height of 50 feet. the formula: h=-16t^2+70t+50 describes the rocket's height,h,in feet t seconds after it was launched. how long will it take the rocket to reach the ground.

69. ## math

Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of $5 per bottle. However, the profit from each bottle beyond 9600 drops by$0.0002 for each additional bottle sold. Assuming at

70. ## Chemistry

Determine the amount (in grams) of boron that when substitutionally incorporated into 1 kg of silicon will establish a charge carrier density of 3.091×1017 carriers/cm3.

71. ## Intro to Chemistry

How do you determine the mass of NACL needed to prepare 25.00 ml of a 1.585M NaCl Solution?

72. ## Chemistry

The heat of combustion of 2-propanol at 298.15 , determined in a bomb calorimeter, is -33.41. (a) For the combustion of one mole of 2-propanol, determine delta U (b) For the combustion of one mole of 2-propanol, determine delta H

73. ## early childhood literacy

Small group discussions with preschoolers enables them to: A)find out if they are superior. B)learn to argue. C)outsmart the others and gain teacher attention. D)compare their ideas with peer ideas. I need help with this one. I think its b.

124. ## Physics

part 1 of 3: A hawk flies in a horizontal arc of radius 9.9 m at a constant speed of 4.8 m/s. Find its centripetal acceleration. Answer in units of m/s^2. part 2 of 3: It continues to fly along the same horizontal arc but increases its speed at the rate of

125. ## Math

Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the x-axis.

126. ## Physics

During a baseball game, a batter hits a pop up to a fielder 65m away. The acceleration of gravity is 9.8m/s^2. If the ball remains in the air for 5.7s, how high does it rise? Answer in units of m.

127. ## Physics

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

128. ## chemistry

boron-10 has an atomic number of 5. how many neutrons are in this isotope? 0 neutrons, 2 neutrons, 5 neutrons, 10 neutrons. I say 5

129. ## Math

How long it will take for an investment of 2000 dollars to double in value if the interest rate is 9.5 percent per year, compounded continuously?

130. ## health

if i put a .... that's what ithink the answer is may u checkitin tell what i got wrong so i can retry to do it 11. Fats help maintain your cell membranes. (1 point)True False .... 12. Your body does not use energy when you sleep. (1 point)True False ....

131. ## Physics

A plane drops a bomb from an altitude of 10,000m. a. Determine the time the bomb is in the air. b. Determine the velocity the bomb would have right before it hits the ground. c. Before the bomb is launched the plane has a horizontal velocity of 92m/s.

132. ## Physics

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

133. ## Physics

part 1 of 3: A hawk flies in a horizontal arc of radius 9.9 m at a constant speed of 4.8 m/s. Find its centripetal acceleration. Answer in units of m/s^2. part 2 of 3: It continues to fly along the same horizontal arc but increases its speed at the rate of

134. ## Chemistry

Chemical analysis of a germanium crystal reveals indium at a level of 0.0003091 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Ge matrix is negligible, what is the density of free charge carriers (free

135. ## Physics

During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 148-g baseball crashing through the pane of a second-floor window in a nearby building. The ball strikes the glass at 10.1 m/s, shatters the glass as it passes through,

136. ## Math

if a 65 inch of wire is divided into 7 equal pieces how much wire is left over?

137. ## trouble

Unlike elementary school, Elvis wasn't popular in high school. He didn't fit in well with the other kids, half due to his weird fashion style, and partly because of his shyness. In his senior year, his high school held a talent show which he entered not

138. ## Math

The length of the hypotenuse of a right triangle is 15 cm. The length of one leg is 9 cm. Find the length of the other leg. 6 cm 12 cm 17 cm 144 cm

139. ## math

(-3/5, 2) is a point on the terminal side of theta, find the value of the six trig functions

140. ## Chemistry

Devise a test to distinguish between Cu2+ and Co2+.

141. ## English

1. I need some bread and some cheese. 2. I need some bread and cheese. (Are both the same or different in meaning?)

142. ## Physics

2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take

143. ## physics

A catapult gives a rock a vertical velocity of 122m/s. a. Determine the time the rock is in the air. b. Determine the maximum height the rock would reach. c. As the rock leaves the catapult the rock also has a horizontal velocity of 34m/s. solve for the

144. ## Math

578 of 850 employees work directly with guests what percentage of employees work directly with guests

145. ## Chem II

Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.

what does Descartes rule of signs tell you about the possible number of positive real number zeros and the possible number of negative real zeros of the function? 1. f(x)=2x^5-5x^2+x-1 2. f(x)=5x^6+7x^4-x-6 please show work

147. ## math

Round the nearest ten 131 137 133 139 135 134 138 those are the numbers

148. ## math

for n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x succes n=5,p=1/3, x=4

149. ## chemistry

Lithium-6 has an atomic number of 3. how many neutrons are in this isotope? A. 0 neutrons, B. 3 neutrons, C. 6 neutrons, D. 9 neutrons I say B

150. ## politics

Most people would agree that everybody has a right to privacy. However, that right is not explicitly guaranteed in the Constitution. As such, many argue that the Supreme Court overstepped it's authority in establishing a Constitutional protection for

151. ## Physics

A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.

152. ## Physics

A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

153. ## Grammar

Which type of sentence is the following? An example would be. A) correct sentence B) run-on sentence C) sentence fragment I answed C

154. ## Chemistry II

Devise a test to distinguish between Cu2+ and Co2+.

155. ## Physics

A man jumps straight up at 5m/s. a. Determine the time the man is in the air. b. Determine the maximum height the man would reach. c. As he jumps, a jerk pushes him in the back, giving him a velocity of 12m/s. determine the range of the man. d. Solve for

156. ## Chemistry

By titration it is found that 69.9 mL of 0.151 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

157. ## arithmetic

Write 8tenth with common fraction and decimal fraction

158. ## chemistry

A solution contains 5.00% (by mass)NaCl. The density of the solution is 1.064 g/cm^3. What is the molarity of NaCl?

159. ## math

rewrite the equation so that y is a function of x.then use the result to find y when x= -2,-1,0,1 -6x-1=-4y+2

160. ## calculus

Use the tangent line approximation to approximate the value of ln(1008)

161. ## Punctuation

Which sentence is correctly punctuated? A) A well-rounded medical transcription editor is very detail oriented, and s/he usually loves to learn new words. B) A well-rounded medical transcription editor is very detail oriented and s/he usually loves to

162. ## Physics

A 1.1 kg lizard lies on a flat rock tilted. A person decides to tilt the rock hoping that the lizard falls off. The rock is tilted at an angle of 15 degrees with respect to the horizontal. The coefficient between the rock and the lizard is .16. What is the

163. ## Grammar

Which type of sentence is the following? Risk factors that are involved. A) correct sentence B) run-on sentence C) sentence fragment I answered C, because what risk factors?

What effects does climate have on Mexican daily life and its economy? I have no idea?!

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165. ## Chemistry

Devise a test to distinguish between Cu2+ and Co2+.

166. ## English

In what stage of grief do people hold on to pets or objects that was their loved one who died? Thanks

167. ## chemistry

which of the following are paramagnetic: O2, O2(-), O2(2-) and why?

168. ## Can someone help with this?

A psychologist is performing an experiment involving a controlled group and an experimental group. With the experimental group, the psychologist is giving a placebo and labeling it as caffeine pill. The control group receives a caffeine pill, which is

169. ## chemistry

A puncture in the tubing of a refrigerator can cause severe frosbite as chloroethane C2H5Cl, vaporizes. Use this thermochemical equation to calculate the heat absprbed when 23.6g of chloroethane vaporizes at its boiling point (9.66kj) C2H5Cl(liquid) +

170. ## History

What are five kinds of cases heard by the Federal Courts?

171. ## chemistry

a 12.0g of sample A (70.2g/mol)was burned in a bomb calorimeter in an excess of O2(g). A+2 O2(g)---> 2 CO2(g) +2 H2O(l) The temperature of the calorimeter rose from 25.00 degrees celisus to 29.82 degree celisus. ifthe heat capacity of the calorimeter and

172. ## science

how much of naoh is required to neutralize 1500 ml of 0.1 N hcl

173. ## Math

decide on a topic which is adding more clubs for which they would like to collect data and design a survey for school which could really be used to convince the principal to do. Create 5-7 questions for the survey.

174. ## statistics

2. The Occupational Safety and Health Administration (OSHA) estimates that roughly 30% of all worker compensation claims stem from back injuries. This statement was made many years ago and you want to know if this has changed in recent years. Suppose you

175. ## Chemistry

1)The conduction band is at a higher energy than the valence band. True or false? 2)No electronic states lie between the conduction and valence bands in n-type silicon. True or false?

176. ## chemistry

Gallium nitride (GaN) is a semiconductor with a bandgap Eg=3.2 eV. Calculate the absorption edge of GaN. Express your answer in units of m.

177. ## Physics (Please, it's a minor error)

A rectangular block has dimensions 1.5cm x 3.2cm x 3.9cm and a mass of 61g. Determine the density in SI units My taking on the question, Mass= 0.061kg Volume= 0.1872m Density=0.061kg/0.1872m=0.3258547kgm^-3 Can someone please tell me where I'm going wrong?

178. ## Physics

part 1 of 3: A hawk flies in a horizontal arc of radius 9.9 m at a constant speed of 4.8 m/s. Find its centripetal acceleration. Answer in units of m/s^2. part 2 of 3: It continues to fly along the same horizontal arc but increases its speed at the rate of

179. ## physics

So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the

180. ## algebra

Factoring 12m^2n^2-8mn+1

181. ## Math

A plane will normally cover 52 km in 12 min in still air. On one trip she flew with the wind for 2.5 hr. returning, she still had 100 km to go after 3.5 hr. what was the wind speed?

1.21 Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business (M. W. Ford, D. W. Kent, and S. Devoto, “Learning from the Pros: Influence of Web-Based Expert Commentary on Vicarious

183. ## Physics HELP!

2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take

About half of the acid rain in Canada comes from the United States. true?

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185. ## Physics

When a gun (3 kg) shoots a bullet (.025 kg), the bullet goes forward and the gun recoils backward. Which of the following statements is true? Select one: a. The force pushing the gun backwards is smaller than the force pushing the bullet forward. b. Both

186. ## Physics

A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.

187. ## How do I calculate the number of atoms in a compou

I have the mass of the amount of substance, and the molar masses. How do I do this? Is this the same as calculating the number of molecules/ formula units? Also, I know the number of atoms for each element in the compound (It made me calculate that before)

188. ## Grammar

Which sentence is correctly punctuated? A) This test, in my opinion, is easy. B) This test in my opinion is easy. C) This test, in my opinion is easy. D) This test in my opinion, is easy. I answered C

189. ## Physics

For which of the following situations can the equation F = mg not be used to calculate the force due to gravity? a) The pull of gravity on an apple on the surface of the Earth. b) The pull of gravity on an airplane flying at an altitude of 8 km above the

190. ## calculus

A 100 inch piece of string is cut into 3 pieces. One piece forms a circle, one forms a square and 1 forms an equilateral triangle. If the perimeter of the triangle is equal in length to the perimeter of the square how long should each piece of string be to

191. ## college algebra

use the remainder theorem to find the remainder when f(x) is divided by x+2. then use the factor theorem to determine whether x+2 is a factor of f(x). f(x)=4x^6+36x^3+32 please show work

192. ## math

Use the tangent line approximation to approximate the value of ln(1.004)

193. ## Physics

A 4.29 kg block starts from rest at the top of a 31.8 degrees incline and slides 2.22 m down the incline in 1.22 s. The acceleration of gravity is 9.8 m/s^2. What is the acceleration of the block? Answer in units of m/s^2 What is the coeﬃcient of kinetic

194. ## Physics

Two objects are connected by a string with a mass less, friction less pulley. The coefficient of friction is .298. The block on the table is 4 kg. What must the mass of the hanging block be so that the block on the table will move with a constant speed?

195. ## chemistry

How do I calculate the number of atoms in a compound (not an element)? I have the mass of the amount of substance, and the molar masses. How do I do this? Is this the same as calculating the number of molecules/ formula units? Also, I know the number of

196. ## Algebra

Write expression as the logarithm of a single expression or number: ln(3x+2)+ln(x+4)

197. ## Algebra 1

solve: log8(w-6)=2-log8(w+15) note: the 8 is to be little at the bottom right corner of log

198. ## Chemistry

Select all suitable dopant atoms from the following list: P B Mg Ga As In Sb Al Tl H

199. ## Physics

A helicopter drops a box from 120m in the air. a. Determine the time the box is in the air. b. Determine the velocity the box would have right before it hits the ground. c. Before the box falls the helicopter had a horizontal velocity of 55/s. Determine

200. ## Math

What is the slope of the line that passes through (5,8)(17,2)? I think the answer is: -1/2 (1 over 2)

201. ## Art

4. What artist from the Harlem Renaissance used geometric shapes and areas of flat color in his work.

202. ## chemistry

A compound of Fe and Cl is soluble in water. An excess of AgNO3 was added tp precipitate the Cl- as AgCl. if a 1.540g sample of the compund gave 4.082g AgCl, What is the formula of the compound?

203. ## Math prep

1). Using the function: y=y0,(.90)^t-1. In this equation y0 is the amount of initial dose and y is the amount of medication still available t hours after drug is administered. Suppose 20mg of the drug is administered. How long will it take for this initial

204. ## chemistry

Lithium-6 has an atomic number of 3. How many protons are in this isotope? A. 0 protons B. 3 protons C. 6 protons D. 9 protons I think 3

5. Which of the following explain why Momma plans the trip to Birmingham so carefully: (1 point)

206. ## Physics

A plane is capable of flying 200 km/h. There is a wind of 90 km/h from the east. The pilot flies in a northwest direction relative to the ground for three hours from city A to city B. Find the speed of the plane relative to the ground, the heading of the

207. ## Punctuation

Which sentence is correctly punctuated? A) Upon hearing her children were hungry; she cooked a lovely homemade dinner. B) Upon hearing her children were hungry she cooked a lovely homemade dinner. C) Upon hearing her children were hungry, she cooked a

208. ## Physics

A plane is capable of flying 200 km/h. There is a wind of 90 km/h from the east. The pilot flies in a northwest direction relative to the ground for three hours from city A to city B. Find the speed of the plane relative to the ground, the heading of the

209. ## maths

how fast does a childs heart beat in a minute?

210. ## Cell Biology

How many molecules of ATP will be synthesized by the complete oxidation of one molecule of fructose 1, 6-bisphosphate to carbon dioxide and water by a liver cell? Show your work.

292. ## math

y=3.0,2.2,1.9,1.6,1.4,1.2,1.1,1.0,0.88,0.83 x= 2,3,4,5,6,7,8,9,10,11 how do you find the equation curve of best fit with these numbers

293. ## algebra

What is (-2)^2 (-3)^2

294. ## Math

(0,0) (20,7.2) (40,12.8) (60,16.8) (80,19.2) (100,20.0) (120,19.2) (140,16.8) (160,12.8) how do you find the equation curve of best fit with these numbers

295. ## Math Ms. Sue

What is the slope of the line that passes through (3/5,-2)(-6,2/9)? I don't even have a good guess at this one. Thanks.

296. ## Physics

An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?

297. ## math

xy=-2 and dy/dt=4. Find dx/dt when x=1.

298. ## Social studies

In the old days, people had to make the ropes tight before they went to bed. Do you know the reason why they had to make the ropes tight? Is that because of the shape of the bed in the old days?

299. ## Precalc

how do you find x in 7-=log(x/10^-12)

300. ## Real Estate Finance

A borrower wants to qualify for a $185,000 FHA insured loan at 4% interest for 30 years with payments of$833.21. What would be the up-front MIP cost:\$_____

301. ## Math

What is the slope of the line that passes through (3/5,-2)(-6,2/9)? I don't even have a good guess at this one. Thanks.

302. ## Math

Create 4 proportions that will work for the following scenario: If the scale is 3.5 in = 8 ft and the drawing measures 6 in, what is the actual distance?

303. ## chem

What is the final temperature (degrees celcius) of 1.36g of water with an initial temperature of 23.0degrees celcius after 6.420J of heat is added to it?

304. ## Physics HARD

If an objects vbr is 6.32N/sc what is its mass? I'm so stuck...:((((

305. ## Earth-Space Science

what factors might affect the length of the rays after an impact?

306. ## math

rewrite the equation so that y is a function of x.then use the result to find y when x= -2,-1,0,1 -2y-3x-16=0

307. ## counting up method

how do you do the counting up method

308. ## chemistry

what is evidence of exothermic rection?

309. ## English

1. They move only 2 meters an hour. 2. They move only for 2 meters an hour. 3. They move for only 2 meters an hour. (Are all grammatical?)

310. ## Social Studies

Which one is the longest among Royal Pythons, Reticulate Pythons, and Anacondas?

311. ## algebra

finding slope from an equation y = -5/2x-5

312. ## srinvas

solve ;2 xsquare y-3 xsquare+4 y=2010

313. ## math

how do you find ratios? and then how do you explain how you got it

314. ## algebra 1

how do you add equivalent fractions such as 7/20+3/9