# Questions Asked onSeptember 21, 2010

1. ## science

in a symbiotic relationship a) both organisms always benefit b) both organisms are harmed c) both organisms never benefit d) at least one organism always benefits e) neither organisms is affected d

2. ## physiscs

a pendulum of the length L is suspended from the ceiling of an elevator. When the elevator is at rest , the period of the pendulum is T. In instant when the pendulum reaches its highest position the elevator starts the free fall. What is the period of the

3. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from

4. ## Chemistry

a)What mass of water is produced from the complete combustion of 2.30×10−3 g of methane? b)What mass of oxygen is needed for the complete combustion of 2.30×10−3 g of methane? This is the unbalanced equation given: CH4+O2->CO2+H2O

5. ## Chemistry

a). What mass of carbon dioxide is produced from the complete combustion of 2.30×10−3g of methane? b)What mass of carbon dioxide is produced from the complete combustion of 2.30×10−3 g of methane? Can someone step me through this?

6. ## physics

a cheetah can accelerate from rest to 24 m/s in 2.0 s . Assuming the acceleration is constant over the time interval, a)what is the magnitude of the acceleration of the cheetah? b) what is the distance traveled by the cheetah in these 2.0 s.? c) a runner

7. ## chem

Which of the following elements would you expect to gain electrons in chemical changes? (Select all that apply.) gold chromium zirconium nitrogen iodine

8. ## physics

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.5 km/s while moving it through a distance of only 1.7 cm. (a) What acceleration does

9. ## Calculus

Find expressions for the quadratic functions whose graphs are shown. One graph has the point (4,2) plotted in which the parabola passes through (U-shaped parabola- right side up) The vertex is at (3,0) and the parabola does not touch the y-axis for as much

10. ## 6th grade social studies

When and why did the cultures od Egypt an Nubia begin to mix? The cultures of Egypt and Nubia begin to mix as people and goods passed between Egypt and Nubia. The two cultures mix because Egypt conquered most of Nubia and ruled it for 100 years and during

11. ## physics

A horizontal force of 100 N is required to push a piece of furniture across a floor at a constant velocity. what is the net force acting on the furniture? How much is the friction force that acts on the sliding furniture? How much friction acts on the

12. ## physics

A small map shows New York to be 486 miles in a direction 8° north of east from Columbus. The same map shows that Buffalo is 302 miles in a direction 56° west of north from New York. Assume a flat Earth, and use the given information to find the

13. ## physics

A man whose mass is 75kg walks up a flight of 12 steps each 20 cm high in 5 seconds . Find the power he develops in watts

14. ## Physics

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air

15. ## chemistry

calculate the amount of heat released when 50g of water at 100degrees hits the skin, condenses, cools the body to 37 degrees

16. ## Chemistry

Please help the question that I got is: Calculate how much 95% ethyl alcohol will be required to dissolve 075g sulfanilamide at 78 degree Celsius. Knowing that solubility of sulfanilamide is 210 mg/ml at 78 degree Celsius, 14mg/ml at 0 Degree Celsius.

17. ## Math

A real estate agent to sell a large apartment complex according to the following commission schedule: $45,000 plus 25% of the selling price in excess of$900,000. Assuming that the complex will sell at some price between $900,000 and$1,100,000, inclusive,

18. ## physics

If the back of the truck is 1.0 above the ground and the ramp is inclined at 26, how much time do the workers have to get to the piano before it reaches the bottom of the ramp?

19. ## Science

Calculate how much 95% ethyl alcohol will be required to dissolve 075g sulfanilamide at 78 degree Celsius. Knowing that solubility of sulfanilamide is 210 mg/ml at 78 degree Celsius, 14mg/ml at 0 Degree Celsius.

20. ## Chemistry

a)How many grams of NH3 can be produced from 2.84mol of N2. b)How many grams of H2 are needed to produce 14.86g of NH3? balanced equation: 3H2+N2->2HN3

21. ## physics

You throw a ball upward from a window at a speed of 2.9 m/s. How fast will it be moving when it hits the sidewalk 2.2 m below?

22. ## physics

A suspension bridge is 66.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. At the location of the bridge, g has been measured to be 9.83 m/s2. In each of the following, assume that there is no air resistance. (a) If you

23. ## physics

An airplane is flying horizontally with a constant velocity of 170 m/s at an altitude of 4500 m when it drops a package. (a) How long does it take for the package to reach the ground? ___s (b) What is the distance between the airplane and the package when

24. ## college physics

To stretch a spring 7.00 cm from its unstretched length, 16.0 J of work must be done. What is the force constant of this spring? What magnitude force is needed to stretch the spring 7.00 cm from its unstretched length? How much work must be done to

25. ## Physics

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)?

26. ## physics

A diver running 1.8m/s dives out horizontally from the edge of a vertical cliff and 3.0s later reaches the water below. How high was the cliff, and how far from its base did the diver hit the water?

27. ## Chemistry

ammonia gas reacts with copper (ii) oxide at high temperatures to produce elemental nitrogen, copper metal, and water vapor. Assume that 36.2g ammonia reacts with 180.8 g copper ii oxide. (balanced equation: 2 NH4 (ammonium) (g) + 4 CuO (copper ii oxide)

1. to make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter at 20 degree

29. ## chemistry

Commercially available concentrated sulfuric acid is 18.0 M H2SO4. Calculate the volume (in mL) of concentrated sulfuric acid required to prepare 1.60 L of 0.320 M H2SO4 solution.

30. ## college physics

Two blocks each of mass m = 4.10 kg are fastened to the top of an elevator as in the figure below. (a) If the elevator accelerates upward at 1.6 m/s2, find the tensions T1 and T2 in the upper and lower strings. (b) If the strings can withstand a maximum

48. ## math

translate each of the following into a verbal phrase. 1.4+3x 2.3x-4 3.2(x+3) 4.5+1/3x 5.2a+3b 6.6x-5 7.1/2x-4 8.x-3/7 9.5x-9y 10.(5+x)+2 11.15 . x/5 12.3+x/3+8

49. ## Science

A bus makes a 10 mile journey throuh town. Its top speed is 30mph and its mean speed its 10 mph. Explain why these speeds are different?

50. ## physics

An elevator without a ceiling is ascending with a constant speed of 9.7 m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0 m above the elevator floor, just as the elevator floor is 25 m above the ground. The initial speed of the

51. ## physics

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?

52. ## Principles of Accounting I

It is standard procedures, or GAAP, to make an adjusting entry to remove the current year's principle from the long-term liabilities. You are the bookkeeper for biker's business. Biker's business has a bank loan that requires a current ratio of 1.5 times.

53. ## Physics

In the figure, particle A moves along the line y = 26 m with a constant velocity of magnitude 2.6 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant acceleration of

54. ## 6th grade social studies

Okay, here's another. Describe the series of events that led to the end of Egypt's power in the Nile River Valley. My answer--The series of events started with Egypt having trouble with keeping conquered people under control,then they were conquered by the

55. ## physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed?

56. ## physics

You drop a stone into a deep well and hear it hit the bottom 1.90 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the stone hitting the bottom to reach you. Sound travels about 343

57. ## physics

A student bikes to school by traveling first d_N = 1.10 \rm {miles} north, then d_W = 0.500 \rm {miles} west, and finally d_S = 0.200 \rm {miles} south. If a bird were to start out from the origin (where the student starts) and fly directly (in a straight

58. ## physics

What average force is required to stop an 1300 -kg car in 9.0 s if the car is traveling at 90 km/h?

59. ## physics

Two long, straight wires are separated by 0.12 m. The wires carry currents of 8.0 A in opposite directions, as the drawing indicates. (a) Find the magnitude of the net magnetic field at the point A. ___T (b) Find the magnitude of the net magnetic field at

60. ## Math

a grocery clerk nstacks three rows of can of fruit for a display, each of the top two rows has 2 fewer cans than the row beneath it, there are 30 cans altogether, how many cans are in each row?

61. ## chemistry

3) A graduated cylinder has 25.0mL of water in it before an aluminum cube with the mass of 10.0g is added to it. What is the new level of water in the cylinder?

62. ## Calculus

According to Kleiber's Law, the metabolic rate P (in kilocalories per day) and body mass m (in kilograms) of an animal are related by a three-quarter power law given below. Estimate the increase in metabolic rate when body mass increases from 65 to 66 kg.

63. ## Math

The entire surface of a solid cube with a length of 6 inches is painted. The cube is then cut into cubes each with edge of length 1 inch. How many smaller cubes are there? How many of the smaller cubes have paint on exactly 1 face?

64. ## Grammar

Write each possessive noun or contraction with an apostrophe. 1. Woodrow Wilson was Americas twenty-eighth president. America's 2. As a student at Princeton, joined the schools debating society. schools' 3. Before becoming president, he served as Princeton

65. ## Physics

Two baseballs are thrown off the top of a building that is 7.24 m high. Both are thrown with initial speed of 63.3 mph. Ball 1 is thrown horizontally, and ball 2 is thrown straight down. What is the difference in the speeds of the two balls when they touch

66. ## Physics

A particle of mass m is subjected to a force acting in the x-direction. Fx = (3.2 + 0.55x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.5 m. 1

67. ## geography

What does Pig ears stand for?

68. ## physics

A ball is thrown horizontally from the roof of a building 33.0 m tall and lands 20.5 m from the base. What was the ball's initial speed?

69. ## physics

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and

70. ## Science

A bus makes a 10 mile journey throuh town. Its top speed is 30mph and its mean speed its mph. Explain why these speeds are different?

71. ## science

a cookie a certain mass. explain why the mass would not change if you break the cookie in half.

72. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)

73. ## science

What mass of protons would be required to just neutralize the charge of 1.7 g of electrons? I thought it was simple because 1 proton maxes out 1 electron but my teacher started talking abou this complicated way of doing it and i didn't get it :( can

74. ## Caclulus, bobpursley HELP!

Sorry for bothering you on this one question but I just replied to my original problem if you could help me with that.

75. ## science

Check my answers? thanks ppl 1. which of the folowing is NOT considered an organism? A an oak leaf B a spider C an elephant D a bacteria cell is it D. 2.to which domain of life do humans belong? A. animals B. eukarya C. archae D. none of the above IS IT D

76. ## Calculus

If the function f is defined by f(x)=x^2-2x, find limit h->0 (f(3+h)-(f(3-h))/2h

77. ## math

A cyclist leaves his training base for a morning workout, riding at the rate of 18 mph. One hour later, his support staff leaves the base in a car going 52 mph in the same direction. How long will it take the support staff to catch up with the cyclist once

78. ## science

An organism's ability to maintain homeostasis is important to it's survival. Explain why an organism that lives on land has more complex mechanisms to maintain a stable internal environment than organims that live in water.

79. ## physics

A charge of 6.00mC is placed at each corner of a square 0.100 m on a side. Determine the magnitude and direction of the force on each charge.

80. ## physics

Consider again the problem of a car traveling along a banked turn. Sometimes roads have a "reversed" banking angle. That is, the road is tilted "away" from the center of curvature of the road. If the coefficient of static friction between the tires and the

81. ## physics

A ball is thrown horizontally from the roof of a building 60 m tall and lands 45 m from the base. What was the ball's initial speed? _______m/s

82. ## physics

The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 125 m below. The supplies should be dropped how many seconds before the plane is directly overhead? ______s

83. ## physics

A high diver of mass 50.0 kg jumps off a board 10.0 m above the water. If her downward motion is stopped 1.80 s after she enters the water, what average force did the water exert on her?

84. ## college

Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 39 %?

85. ## Physics

Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 4.54 m/s, they then have the same kinetic energy. Calculate the original speeds of the two cars. first car

86. ## Physics

A spring with a spring constant of 223.9 N/m is compressed by 0.220 m. Then a steel ball bearing of mass 0.0372 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the

87. ## physics

The pilot of an airplane traveling 240 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is directly overhead?

88. ## To Brittany and Ryan

Because of your unacceptable remarks about another student's homework assignment, you have been banned on a temporary basis. We'll see in a couple of days if you can demonstrate civility online.

89. ## physics 101

What minimum speed does a 150g puck need to make it to the top of a 4.5m -long, 21degree frictionless ramp?

90. ## physics

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0^\circ (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?

91. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)

92. ## Chemistry

1) A jar is filled with mercury and has a volume of 500.mL. What is the mass of mercury in the jar? Show your work for credit.

93. ## physics

a cannon ball is shot from a 100 m high cliff with an inital velocity of 24m/s and at an angle of 32 degrees. what is the overall final velocity of the cannonball?

94. ## Physical Science

Need help please. the once with the ( ) is my answer but i am not sure if it right. Thanks for your help. 15. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be A. real, inverted, and larger

95. ## chemistry

How many ML of H2SO4 (20m) are needed to make 500ml of 5M solution?

96. ## physics

HELP PLEASE!!! A satellite moves in a circular orbit around Earth at a speed of 5085 m/s. (a) Determine the satellite's altitude above the surface of Earth. (b) Determine the period of the satellite's orbit.

97. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

98. ## Chemistry

Suppose that the KMnO4 (aq) were standardized by reaction with As2O3. As2O3 + MnO4- + H+ +H2O yields H3AsO4 + Mn2+ (not balanced). If a 0.1322-g sample that is 99.16 % As2O3 by mass had been used in the titration, how many milliliters of the 0.02140 M

99. ## college physics

A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.26 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

100. ## math

x=((30)/(5.15+1.84i))+(5.15+1.84i) i= square root of (-1) final answer of x=10.3 please show me how you drive this equation to get the 10.3. thank you so much.

101. ## Chem- bobpursley

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I

102. ## AED 201

Determine which factors may explain that most of the higher per-pupil expenditures are found in the Northeastern and upper-Midwest states and the lower per-pupil expenditures are found in the South and West. In your opinion, what must happen to create a

how would you use the word civility in a sentence

104. ## Chemistry h/w

Hi, this is my first lab in 2nd semester of chemistry, and im not sure about my answers in the assignment can someone give it a quick look to check them? this is my phase diagram: tinypic. com/view.php?pic=1605yev&s=7 p.s. ignore the lone red dot its

105. ## english

How is "The Handsomest Drowned Man in the World" an example of the author using social realism?

106. ## Calc

The manager of a weekend flea market knows from past experience that if he charges x dollars for a rental space at the market, then the number y of spaces he can rent is given by the equation y= 200-4x. Is this correct? Slope represents the relationship

107. ## Math

Find the area of the surface generated by revolving the curve y = (x + 3)^1/2, 2 ≤ x ≤ 4 about the x-axis.

109. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point?

110. ## math

Kelly subtracted 2.3 from 20 and got 17.7. Explain why this answer is resonable.

111. ## Geometry

The perimeter of a regular pentagon is 31 cm. Find the length of each side.

112. ## Math: Inequalities

How would I solve this inequality and graph? (x+2)((x^(2)-x+1)) > 0 I got x > -2 and x^(2)-x+1 > 0 How would I graph x^(2)-x+1 > 0 because I can't factor it.

113. ## maths

For the reaction given below, how many grams of Na2CS3 are produced in the reaction of 65.0 mL of liquid CS2 (d = 1.26 g/mL) and 1.56 mol NaOH?

114. ## Algebra

Determine if the following two planes 2x+3y-z=4 and 3x-4y-6z=1 are parallel, orthogonal or coincidental

115. ## math/physics

A motorboat whose speed in still water is 3.00 m/s must aim upstream at an angle of 27.0 degrees (with respect to a line perpendicular to the shore) in order to travel directly across the stream. What is the speed of the current?

116. ## college physics

A cannon is fired from a cliff 200 m high downward at an angle of 30o with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

117. ## English

Can you please tell me if the following sentences are possible? I really don't know how to say it in English. Thank you. 1) I do the shopping at the market every Saturday. (Should I consider it a mistake if the sentence started with "every Saturday"?) 2)

118. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is the amplitude of the subsequent oscillations?

119. ## college physics

A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s,

120. ## physics

A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

121. ## algebra

m+3n=7;n=-2,0,1

122. ## biology - Genetic probability

Black coat colour in Labrador Retrievers is produced by the dominant B allele. Brown labs are homozygous recessive (bb). Duke, a black male, whose mother was brown, is mated with Shadow, a black female, who in a previous mating with another father produced

141. ## Math

Chad's property tax is 646.07 and is due April 20. He does not pay until Aug 29. 9.8 % Simple interest on unpaid tax. Find the penalty. can you please explain how we do this. thank you.

142. ## chem

A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? my teacher said 6pt x conversion to make kg and then add that to 6nx conversion to make kilograms. then that times conversion for

143. ## physics

A freight train has a mass of 1.7 multiplied by 107 kg. If the locomotive can exert a constant pull of 7.4 multiplied by 105 N, how long does it take to increase the speed of the train from rest to 68 km/h?

144. ## physics

plane traveling 200 km/hr with supplies for people 110 meters below. how many second before do they have to drop the supplies

HOW CAN SOCIAL DEVELOPMENT IMPROVE THE ECONOMIC DEVELOPMENT OF A COUNTRY?

146. ## science

I have a container which hold 30ml of fresh water that I need to heat to boiling using electricity run through an assumed efficient resistor. Assuming an ambient temperature of 23 degrees celsius how much watt energy do I need to put into 30 ml to bring

147. ## physics

A cannon is fired from a cliff 200 m high downward at an angle of 30o with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

Why can you simplify 5(5+30) using the distributive property?why can't u simplify 5(50)+3 using the distributive property?

149. ## calculus

use the following tables for f(x)and g(x), and just fill in the tables shown below: Use the following two tables: x 0 1 2 3 4 5 y=g(x) 9 2 15 1 11 14 And fill in the following table: x 7 10 11 y=g(x-6) a b c A= B= C=

150. ## math

factor: 1. 6x^2y+4xy^3+10x^4y^4 2. 27m^3-8 3. 6n^8-11n^4-10 4. nx^2+x^2-9n-9

151. ## American Government

I have to do a 5 minute presentation on George Washington and I have to focus on his contributions towards the Constitution. All the sites I go to have pretty much the same information. Does anyone have sites that could help me?

152. ## biology

When considering the incresing complexity of atoms, molecules, cells, and tissues, you may notice that each step characteristics that were absent in the previous level. These characteristics, called emergent properties, demonstrate that the whole organism

153. ## Calculus, bobpursley!

This has to do with my last Calculus problem. I need help on it..The part I replied to after you answered the question.

154. ## Math

The Bee's bus passes Jamie's house every 20 minutes, and the Wasp bus passes every half an hour. Both buses pass thehouse together at 1:10 P.M. When is the next time the buses pass together?HELP!

155. ## physics

An athlete executing a long jump leaves the ground at a 20° angle and travels 7.80 m. (a) What was the takeoff speed? 1._____ m/s (b) If this speed were increased by just 5.0%, how much longer would the jump be? 2.______ m

174. ## chemistry h/w

Hi, this is my first lab in 2nd semester of chemistry, and im not sure about my answers in the assignment can someone give it a quick look to check them? this is my phase diagram: tinypic. com/view.php?pic=1605yev&s=7 p.s. ignore the lone red dot its

175. ## Spanish

I need help placing accent marks where they belong in this short story. !Hola, Andres! ?Como estes? Fantastico, Carmen, ?y tu? Horrible. ?Por que? El profesor Gomez me indico ayer que yo tendre que sacar por lo menos una B en el examen manana para salir

176. ## Calculus

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. b) Express the distance s between the

177. ## Physics

Can someone help me to understand how to work out this problem? The pilot of an airplane traveling 240 km/h wants to drop supplies to flood victims isolated on a patch of land 160 m below. The supplies should be dropped how many seconds before the plane is

178. ## world history

Did Islam become more less influential in West Africa from the 700s to the 1400s?

179. ## Physics

A brick is thrown upward from the top of a building at an angle of 30° to the horizontal and with an initial speed of 11 m/s. If the brick is in flight for 3.2 s, how tall is the building? ___m

180. ## physics

An airplane flies 200 km due west from city A to city B and then 305 km in the direction of 30.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? ___km (b) Relative to city A, in what direction is city C?

181. ## physics

The best leaper in the animal kingdom is the puma, which can jump to a height of 11.5 ft when leaving the ground at an angle of 52°. With what speed, in SI units, must the animal leave the ground to reach that height? ___m/s

182. ## math

x=((30)/(5.15+1.84i))+(5.15+1.84i) i= square root of (-1) final answer of x=10.3 please show me how you drive this equation to get the 10.3. thank you so much.

183. ## physics

A net force of 295 N accelerates a bike and rider at 2.60 m/s^2. What is the mass of the bike and rider together?

184. ## chem

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p

185. ## Chemistry - repost

Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks Posted by candy on Tuesday, September 21, 2010 at 10:03am. The following is part of a

186. ## Math

ALL the factors for 1,498,677,308,996? It's taking me too long....o.o Thank ye for the help! xD I thank: Ms. Sue for answering my Economics question, you rock! Someone please answer this! Lots of love from Pancake

asked by The Official Pancake Queen
187. ## maths

32 divides n-6 and 64 does not divide n-6.find the highest power of 2 dividing n+2 and n+6?

188. ## Algebra

factor: 1. 6x^2y+4xy^3+10x^4y^4 2. 27m^3-8 3. 6n^8-11n^4-10 4. nx^2+x^2-9n-9

189. ## english

what does this line mean? A man being sometimes more generous when he has but a little money than when he has plenty

190. ## Chemistry - help

This is a test for chlorides in NaOH sample. 1.0g of NaOH was dissolved in 5ml of distilled water, acidified with 4ml of dilute nitric acid and diluted to 15ml with distilled water. This mixture was poured into a test tube containing 1ml of AgNO3 solution.

191. ## chemistry

1L soulution has a pH of 6 how many OH- would it tak eto make it a pH7 solution?

192. ## physics

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true for false The magnitude of V3 can be -3.0 m/s The x-component of V3

194. ## physics

You push a large 32 kg crate across the floor with a force F=330 N at an angle of 21 degrees below the horizontal. If the coefficient of kinetic friction between the crate and the floor is 0.45, what is the acceleration of the crate?

195. ## Algebra

72+24x=288? What to do with the plus sign after I subract 24 from each side?

196. ## math

x.y=30 and x+y=10.3 ,what is x & Y. final answer is x=5.15+1.86i and y=5.15-186i, this way is by try and error (logic). but can somebody please show me how you do it by aljebra, please, thank you.

197. ## calculus

The position of a particle moving in a straight line during a 2-second trip is given below. s(t) = 2t 2 - 6t + 7 cm (a) What is the average velocity for the entire trip? (Assume the 2 second interval starts at t = 0.) 1 cm/second (b) Find a time at which

198. ## Science

What is a light year? How long does it take for light to reach the Earth from the Sun?

199. ## Algebra

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9y/y(x+5) but it seems to be wrong Could anyone see what I did wrong. Thank you

200. ## biology

C6H12O6=180 gm to make 1M how much H2O will you need? to make a o.1M how much H2O will you need?

2a²+5a+3

202. ## communication

What are the concepts of assertive communication? What are the benefits of being an assertive nurse? The only thing I can come up with is that being an assertive nurse would allow you to stand up to a physician or authority when you feel they have done

203. ## Physics

Show that the pressure P of a gas can be written as: P= 1/3* p* v^2

204. ## Astronomy

A photon of which color of light carries the least energy. Red Yellow Green Blue All photons have the same energy.

205. ## physics

an object is launched horizonally from the top of a lab table that is .90 meters tall. it lands 2.75 meters away. what was the initial horizontal launch speed of the devise? the launcher is now angled 12 degrees below the horizontal. this raises the

206. ## Accounting

Can financial statement users of not-for-profit hospitals’ financial statements expect to be fully informed regarding affiliated parties, such as the linkage between St. Jude Children’s Research Hospital, ALSAC, and the foundation cited?

207. ## Chemistry - bobpursley pls help

Posted by candy on Tuesday, September 21, 2010 at 3:12pm. Yes, my NaOH is granular. Why 7ml of 10M HCl? Do I add 7ml of 10M HCl 1st slowly in ice bath, then slowly adjust the pH to 7 using 10M HCl? Then to dilute to 15ml in a graduated cylinder? Thanks

This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you

I keep mine on a bookshelf my dad and I built ourselves. I, mine, my, I=pronouns bookshelf, dad=nouns I have to identify all of the nouns, pronouns and adjectives.

210. ## Math

1/4=3-2x-1/x+2..so far i have 8x^2-19x+4=0 do i use quadratic formula to solve the rest of the way?

211. ## Math

How to solve this: ((x-3)(x+2))/((x-1)) < 0 I don't understand since theres x-1 in the denominator

212. ## Chemistry - more advice needed thanks

I obtained a lot of dirty brown ppt the moment the mixture was poured into AgNO3 solution. Does this mean my NaOH sample contains a lot of chlorides? Could other silver halides be present? However for my control solution of 50ppm sodium chloride solution,a

213. ## Computer Science

Mythical Man question: If it takes one person 3 months to complete a task, why does it take 4 people 6 months to complete the same task?

214. ## math

In a local college, 60% of the math majors are women. Fifteen math majors are chosen at random.

215. ## math

i have math homework and it says i have to find 1 pair of rectangle that are simular and find the scale factor but i cant find the scale factorthe k rectangle is 4 cubes base by 3cubes height and n rectangle is 12 cubes base and 1 cube height but i cant

216. ## PHYSICS

Taylor Swift leaves Philadelphia for a concert in Dallas. Kellie Pickler leaves at the same time, but in a different tour bus. After 2 hours, Taylor's bus has traveled 50% further than Kellie's bus. If Taylor's bus is going 30mph faster than kellies's bus,

217. ## chemistry

this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation is complicated)

218. ## Geography

What is the second longest river in North America?

219. ## Com 220

what types of introduction and what type of conclusion do you plan to write for your research paper

Having problems with proving segment relationships in paragraph proof forms in geometry.

221. ## chemistry

What is the volume in milliliters of 7.24 {\rm g} of acetone?

When the shuttle bus comes to a sudden stop to avoid hitting a dog, it decelerates uniformly at 3.8 m/s2 as it slows from 8.8 m/s to 0 m/s. Find the time interval of acceleration for the bus. Answer in units of s.

223. ## math

1. state the domain of f(x)= x-2/x^2-x-6 2. given that f(x)=x^2+1 and g(x)= 3x+2, find all values of x such that f(g(x))= g(f(x)) 3. if f(x)= x^3-3x^2-2x+5 and g(x)=2, fin the value of g(f(x))

224. ## Physics

You push your couch a distance of 3.8 m across the living room floor with a horizontal force of 180.0 N. The force of friction is 136.0 N. What is the work done by you, by the friction force, by gravity, and by the net force? you 1 friction force 2 gravity

225. ## Honors Physics

A mass, m1 = 5.00 kg, resting on a frictionless horizontal table is connected to a cable that passes over a pulley and then is fastened to a hanging mass, m2 = 9.0 kg. Find the acceleration of each mass and the tension in the cable. PLEASE HELP!

226. ## math

4/5 - 2/y = 2/15

227. ## English

I still have some doubts about a few questions. Thank you for the help. 1) Are they both possible? What did Kurtz struggle against when dying/when he was close to dying? 2) I'm wearing braces because I've got crooked teeth. 3) I hardly ever put make-up on

228. ## 6th grade social studies

What caused the end of the Old Kingdom? My answer is from my reading the chapters is--- Pharaohs losing power as nobles battled one another caused the end of the Old Kingdom. Is this correct?

229. ## physic

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true or false for each question The magnitude of V3 can be -3.0 m/s The

My teacher has me working on something he calls "tinging fractions". What is this? What does it mean? How does it work?

231. ## sociology

which research technique (survey, observation,experiment, existing sources) would you find most useful when you have been asiigned to do a study of homelessness

232. ## statistics

if there 60% math major are women, 15 were random. what probility 12 women were are selected and what are the mean and variance. Show ne how to work the problems

233. ## Chemistry

Find the limiting reagent. 2 NH4 (g) + 4 CuO (s) ==> N2(g) + 4 Cu(s) + 4H2O (g) Please explain, thank you!

234. ## Computer Graphics

How do you make animated computer graphics, ya know, the ones that move? :S Please answer!!! xD With love, Pancake

asked by The Official Pancake Queen
235. ## CIS 105

Here is the assignment: Use information and data obtained from at least four reliable internet sources to produce a 12- to 15-slide PowerPoint® presentation about multimedia tools that aid classroom instruction. Include details about how each might

236. ## calculus

I have an even number of coins in my pcket exactly one third of them are dimes. Draw or stampo the coins i could have in my pocket. Record thir value.

237. ## Algebra 1

Find all sets of four consecutive even whole numbers whose sum is less than 35

238. ## Algebra

Perform the indicated division 2x^2-7x-13/x-5

239. ## science

1.Describe how the hot water and the cold water moved when the divider was lifted. 2.Use your understanding of density to explain the motion of the water.

240. ## physics

An artillery shell is launched on a flat, horizontal field at an angle of α = 31.5° with respect to the horizontal and with an initial speed of v0 = 266 m/s. What is the horizontal distance covered by the shell after 9.44 s of flight?

241. ## college math

solve absolute value 2x-20 absolute value=absolute value 9x+ ansolute value 15 |2x-20|=|9x+15|

242. ## science

please can you write a summary of maintaining an enviroment through conservation.

244. ## PHYSICS

Taylor Swift leaves Philadelphia for a concert in Dallas. Kellie Pickler leaves at the same time, but in a different tour bus. After 2 hours, Taylor's bus has traveled 50% further than Kellie's bus. If Taylor's bus is going 30mph faster than kellies's bus,

245. ## Sociology college

Hello! i need help my homework In a Gemeinshaft society,people are more likely to 1) be highly dependent on the nuclear rather than the extended family 2) view life and morals in terms of how they affect the individual 3) stress formal education as a

246. ## Algebra

How do you do these type problems?: 1/5+M=-2/5 6x+8=32 4(1/2X+1/2)=2X+2 3-Y=X (Is ^ -3 on both sides?)

247. ## physics

Consider a simple harmonic oscillation with m=0.5kg, k=10N/m and amplitude A=3cm. What is the total energy of the oscillation?

248. ## Math: Inequalities

for this inequality: (x-1)(x-2)(x-3)

249. ## Calculus

Show that the limit for [x^2cos(1/x)]=0 as x approaches 0. How would I solve this algebraically?

250. ## college physics

After falling from rest from a height of 34 m, a 0.47 kg ball rebounds upward, reaching a height of 24 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball?

251. ## algebra

In a triangle ABC , angle B is 4 times angle A and angle C is 17 degrees less than 5 times angle A. Find the size of the angles.

252. ## Math

if three times the complement of an angle is subtracted from its supplement the result ends up being 59 degrees. Find the measure of the angle.

253. ## Math

Monica was collecting quarters and nickels in a jar. She kept track of the total value of the coins, as well as, how many coins were actually in the jar. However, she forgot specifically to track how many of each coin there is in the jar. If the total

254. ## Algebra

I have the qustion 2x+5=-7, and I've figured out that I have to subtract 5 from both sides. However, now I'm left with a plus sign that I don't know what to do with? What do I do next? HELP! THIS IS COMONG FROM A BALLERINA, AND I HATE MATH!

255. ## PHYSICSSS!

A brass lid screws tightly onto a glass jar at 20 oC. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 oC. The inside diameter of the lid is 8.0 cm at 20 oC. Find the

256. ## Computer Science

I previously asked a mythical man question, and I still don't quite understand it. If if takes one person 3 months to make a quilt, why does it take 4 people 6 months to make a quilt?

257. ## physics

I DON'T KNOW WHAT IM DOING WRONG!!!!!!NASA has built centrifuges to enable astronauts to train in conditions in which the acceleration is very large. The device in the figure below shows one of these "human centrifuges." If the device has a radius of 8.3 m

258. ## physics

Suppose I throw a ball straight up at an initial speed of 10 m/s. Suppose I'm 2 meters tall (about 6 feet) and the ball leaves my hand at 2 meters from the ground. How fast is it going at its highest point? How fast is it going on its way back down at 2

259. ## science

how can you tell the element of another

260. ## Chemistry

Why do you believe electrons exist?

368. ## Math (Algebra Grade 8)

2x+5=-7?

explain how to compare 8,563 and 8699

370. ## physics

A supply plane traveling 200 KM/hr need to drop supllys to a target 110 meters below. How many seconds before they are over the target do they have to drop the supplies?

371. ## Physics

two long separated friends, june and bill, spot each other in an airport terminal from a distance of 25m. they start to run towards each other. bill accerlates at a constant rate of 1.5m/s2, and june at a constant rate of 1.2m/s2. how far from junes inital

Calculate the simple interest and maturity valve for the following problems. Round to the nearest cent as needed. 18,000,4 1/2%,18mo.

11/12x 40

374. ## Math

How do you write the rule for a function with the table x=0,2,4,5 y=4,6,8,9 ?

375. ## Spanish

Indicate the relationships between the family members listed below Modelos: yo / mi tía Yo soy el (la) sobrino(a) de mi tía. mis abuelos / mi padre Mis abuelos son los padres de mi padre 1.mi madre / mi hijo(a) 2.mis primos / mi mamá I have the rest of

376. ## english

Make a list of expressions that are followed by the '-ing' form

377. ## math

-19/15 and y - intercept is 0-4

378. ## chemistry

would like to know the complex ion of H2SO4

379. ## MATH

Perform the indicated division 2x^2-7x-13/x-5

380. ## english/nursing

Why is nursing considered a professional career? I have to write a paper on professionalism and how nurses represent this.

381. ## Physics

Suppose I measure the velocity of an object at two different times, t1 and t2. If I tell you that the uncertainty in velocity is 0.1 m/s for each point, then calculate the uncertainty in acceleration if t1 = 0.0 s and t2 = 0.01s.