Thursday
January 19, 2017

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
Starting from rest, a 1.7x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.45 N on it. This force does 1.9x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground...
Friday, October 14, 2016 by BrookeNeed

physics
The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 89.2-kg person straight up by means of a cable. The person has an upward acceleration ...
Friday, October 14, 2016 by BrookeNeed

Physics
A rock is thrown off a cliff with a vertical speed of 53 m/s upward and a horizontal speed of 30 m/s. A) what will these speeds Vx and Vy be 4 second later? B) what will be the x and y displacements of the rock be 4 second later?
Friday, October 14, 2016 by Sue

Physics
A cyclist whose mass is 48 kg turns a corner with a radius of 30 m at a speed of 25 m/s. A) What is the magnitude of the cyclist's acceleration? B) what is the magnitude of the force action on the cyclist?
Friday, October 14, 2016 by Sue

physics
What is the minimum work in joules needed to push a 1210 kg car 54.0 m up a 12.5 degree incline? (Ignore friction.)
Friday, October 14, 2016 by kassy

Physics
Please show me how to work the following problems. 1) A cyclist whose mass is 48 kg turns a corner with a radius of 30 m at a speed of 25 m/s. A) What is the magnitude of the cyclist's acceleration? B) What is the magnitude of the net force acting on the cyclist? 2) A rock...
Friday, October 14, 2016 by Sue

physics
A spring whose spring constant is 450 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.500 kg ball when released?
Friday, October 14, 2016 by kassy

Physics, ray optics
An astronomical telescope of magnifying power 7, consist of two thin lenses 40 cm apart in normal adjustment. Find the focal length of the lenses.
Friday, October 14, 2016 by Bishmay

physics
Two boxes are connected by a weightless cord running over a very light frictionless pulley as shown in the figure. Box A, of mass 8.0 kg, is initially at rest on the top of the table. The coefficient of kinetic friction between box A and the table is 0.10. Box B has a mass of ...
Friday, October 14, 2016 by qais

Physics
A man chased by the army, leaps with speed 12 m/s at a 47 degree angle above the horizontal from the top of a building. If he lands 40.0 m from the base of the building, then finds the height of the building
Thursday, October 13, 2016 by Mary

Physics
What is the centripetal acceleration of an automobile driving at 40 km/h on a circular track of radius 20m? Help ASAP please!!!
Thursday, October 13, 2016 by Anonymous

Physics
A mover finds that a 20 kg crate initially at rest requires a 75 N horizontal force to set the crate in motion, but only a 60 N force to maintain a constant velocity. Find a) the co-efficient of static friction between crate and floor. b) the co-efficient of kinetic friction ...
Thursday, October 13, 2016 by Anonymous

Physics
A plane leaves Seattle, flies 77.0 mi at 21.0 ∘ north of east, and then changes direction to 52.0 ∘ south of east. After flying at 124 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue ...
Thursday, October 13, 2016 by Allison

Physics
If you jumped off a 25 meter cliff on the moon (gravity being 1.66) what would be a comparable hight of that cliff on earth? the answer and show me how to get it.
Thursday, October 13, 2016 by bobby mg

physics
A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?
Thursday, October 13, 2016 by anon

Physics
A 5.7 g bullet leaves the muzzle of a rifle with a speed of 636.8 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the rifle? Answer in units of N
Thursday, October 13, 2016 by william

Physics 11
An airplane flies at 500km/hr, there is a wind kf 50.0km/h(N).if the pilot wants to fly due east, calculate the direction that the plane is heading. Thanks.
Thursday, October 13, 2016 by Jaena MacCharles

Physics
An automobile leaves the store, first going south at 88 km/h for 2 hours, and then turns on a road heading 20 degrees east of north at 55 km/h for 1.5 hours. Calculate the (x,y) components of the net displacement of the automobile from the starting position, where the x-axis ...
Thursday, October 13, 2016 by John

Physics
a) A car accelerates uniformly from rest to a speed of 97.9 mi/h in 6.93 s.Find the constant acceleration of the car.Answer in units of m/s^2. b)Find the distance that the car travels during this time.Answer in units of m. How do you do this?
Thursday, October 13, 2016 by Landia

Physics
What minimum force is required to drag a crate (m = 40 kg) across a floor (co-efficient of kinetic friction = 0.6) if the force is applied at a 45 degree angle upward from the horizontal? Help ASAP please!!
Thursday, October 13, 2016 by Anonymous

Physics
A ball is thrown straight up at 45 m/s. How long will it take the ball to come back to its original height? Why?
Thursday, October 13, 2016 by Taylor

Physics
A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 25 ∘ angle. The block's initial speed is 14 m/s . The coefficient of kinetic friction of wood on wood is μk=0.200. What vertical height does the block reach above its starting point? What ...
Thursday, October 13, 2016 by kitt

Physics
At a certain instant an object is moving to the right with speed 1.0 m/s and has a constant acceleration to the left of 1.0 m/s^2.At what later time will the object momentarily be at rest? How do you do this?
Thursday, October 13, 2016 by Jina

physics
An airplane travels 250 km/h due West for 2 hours. Its average velocity is:
Thursday, October 13, 2016 by Anonymous

Physics
Two men pushing a stalled car generate a net force of +699 N for 7.13 s. What is the final momentum of the car?
Thursday, October 13, 2016 by Ashley

physics
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 71.6-kg water-skier has an initial speed of 5.8 m/s. Later, the speed increases to 11.8 m/s. Determine the work done by the net external force ...
Thursday, October 13, 2016 by Brookeneed

PHYSICS
A 107 kg bix on the right and a 50 kg box on the left are tied together by a horizontal cable. The 107 kg box is acted upon by an external force of 598 N to the right. The frictional force exerted by the floor on the 107 kg box is 30 N and the frictional force exerted by the ...
Thursday, October 13, 2016 by LESTER

Physics
A straight horizontal rope is towing a 5.52 kg toboggan across frictionless ice. A 2.76 kg radio is on top of the toboggan with a coefficient of static friction of 1.50 between the toboggan and radio. In order to prevent the radio from slipping, what is the largest force of ...
Thursday, October 13, 2016 by Jim

Physics
An antique cabinet is in the cab of a pickup truck traveling 20.1 m/s and has a coefficient of static friction of 0.250 between the antique and the cab. In the event of a sudden stop, what is the shortest distance the pickup truck can stop without having the cabinet move ...
Thursday, October 13, 2016 by Matt

physics
On her trip from home to school, Karla drives along three streets after exiting the driveway. She drives 1.85 miles south, 2.43 miles east and 0.35 miles north. Determine the magnitude of Karla's resultant displacement. explanation on answer please
Thursday, October 13, 2016 by hery

physics
the paris gun of world war I was a super gun capable of firing a 234lb shell about 81 miles away. these shells are also the first man made objects to make it to a stratosphere. the length of the barrel of one of these guns was about 34 mETers. a projectile fired from a paris ...
Thursday, October 13, 2016 by kassy

physics
To create artificial gravity, the space station is rotating at a rate of 1.00 rpm.the radii of the cylindrically shaped chambers have a ratio ra/rb that equals 4.00. each chamber A simulates an acceleration due to gravity of 10.0m/s^2. find values for a)ra b)rb and c) the ...
Thursday, October 13, 2016 by kassy

Physics
A ninety kilogram sofa is being pushed by four meters to the other side of a hall. After an initial push the sofa is pushed with a 600 N force. In this case, 0.6 is the coefficient of kinetic friction. (The diagram shows the sofa being pushed from the right). 1) What is the ...
Thursday, October 13, 2016 by Anonymous

physics
Numerical of chapter 5 Fsc part 1 physics "plz answer me fast am so confused" 5.6: A 1000 kg car traveling with a speed of 144 km /h round a curve of radius 100 m. Find the necessary centripetal force?
Thursday, October 13, 2016 by osama qasim

physics
Determine the melting temperature when 150.00g of ice at 0 degree celdius is mixed with 300g of water at 50 degree celsius?
Thursday, October 13, 2016 by elle saqs

Physics
A 5.00-kg block is placed on top of a 10.0-kg block which rests on a horizontal surface. The 5.00-kg block is tied to a wall with a horizontal string. A 45.0-N horizontal force directed away from the wall is then exerted on the 10.0-kg block. The coefficient of kinetic ...
Thursday, October 13, 2016 by Anonymous

physics
a ball rolls off the edge of a tabletop 1m above the floor and strikes the floor at a point 1.5m horizontally from the edge of the table. Find the (a) time of flight (b) initial velocity, (c) final velocity just before it strikes the floor. Plsssss help
Thursday, October 13, 2016 by Katty

physics
latent heat of fusion of ice is 3.36exp5 j/kg and its specific heat is 1200j/mole.k.. 2kg of ice is at -10degC how much ice will be melt when a heat of 1.42exp5 joule is provided completely? a) 0.5kg b) 1.5kg c) 2kg d) 1kg
Thursday, October 13, 2016 by shehzad

physics grade 11
how do i figure out how fast a car is going when all i know is frequency?
Thursday, October 13, 2016 by anon

Physics
A body starts from rest and accelerates to 2meter per second square for 6sec.it maintains this velocity for 10sec and then decelerates to rest in 4sec.calculate the acceleration
Thursday, October 13, 2016 by Gontorwon

physics
the speed of a certain wave is 3.00cm/s. if its frequency is 0.20hz, what are its wavelength and period
Thursday, October 13, 2016 by mark daniel

Physics
how long will it take a bullet fired from a cliff at an initial velocity of 700m per second at an angle of 30 Degree below the horizontal to reach the ground 200m below?answer
Thursday, October 13, 2016 by Abhinand Santhosh

physics
Each charge of 3 micro coulomb are placed at 3 corners of a square whose diagonal is 6cm long. Find the field intensity at the point of intersection of diagonals
Thursday, October 13, 2016 by bareera

Physics
A ball mass 1000g is drop from a height Of 5m and rebounded to a height Of 25 m. Find i it kintentic just before impact ii its intial rebounce velocity and kintentic and show the working.
Thursday, October 13, 2016 by Anonymous

Physics
A ball is thrown toward a cliff of height h with a speed of 31 m/s and an angle of 60∘ above horizontal. It lands on the edge of the cliff 3.4 s later. What is the ball's impact speed?
Wednesday, October 12, 2016 by Evan

Physics
Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 ...
Wednesday, October 12, 2016 by Abigail

Physics
A ninety kilogram sofa is being pushed by four meters to the other side of a hall. After an initial push the sofa is pushed with a 600 N force. In this case, 0.6 is the coefficient of kinetic friction. What would be the magnitude and direction of the frictional force on the ...
Wednesday, October 12, 2016 by Anonymous

Physics
A car of mass 1530 kg traveling at 27.0 m/s is at the foot of a hill that rises 115 m in 4.40 km. At the top of the hill, the speed of the car is 6.0 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses I got 8145.7 watts but that is ...
Wednesday, October 12, 2016 by Trish

Physics
When 20 kJ of heat is removed from 1.2 kg of ice originally at -15 C, what is the new temperature?
Wednesday, October 12, 2016 by April Hanna

Physics
A woman in a car on a level road sees an airplane traveling in the same direction that is climbing at an angle of 30 degrees above the horizontal. By driving 110 km/h she is able to stay directly below the airplane. What is the airplane's velocity?
Wednesday, October 12, 2016 by April Hanna

Physics
A 230-kg roller coaster reaches the top of the steepest hill with a speed of 5.20 km/h. It then descends the hill, which is at an angle of 25° and is 50.0 m long. What will its kinetic energy be when it reaches the bottom? Assume µk = 0.16 I'm not ...
Wednesday, October 12, 2016 by Bex

Physics
A record was set for stair climbing when a man ran up the 2100 steps of the Empire State Building in 15 minutes and 10 seconds. If the height gain of each step was 0.2 m, and the man's mass was 73.0 kg, what was his average power output during the climb I'm not sure ...
Wednesday, October 12, 2016 by Bex

Physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ...
Wednesday, October 12, 2016 by Sue

physics
a block slides down a frictionless ramp. at the bottom of the ramp is a vertical circular loop with a radius of 75 cm. from what minimum height does the block need to be released in order to make it around the loop?
Wednesday, October 12, 2016 by kassy

physics
a block sits on a frictionless inclined plane, attached to another block over a frictionless pulley. the angle of the incline is 20 degrees. what is the tension in the rope and the acceleration of the system? B) what is the speed of the system after the 2kg block has fallen ...
Wednesday, October 12, 2016 by kassy

Physics
An 84 kg child descends a slide 7.2 m high and reaches the bottom with a speed of 3.30 m/s. How much thermal energy (in joules) due to friction was generated in this process?
Wednesday, October 12, 2016 by Aidan

PHYSICS
A swimmer is capable of swimming at 1.4m at still water.caculate how far downstream will it smim across 180m?
Wednesday, October 12, 2016 by ABEL

physics
a golf club strikes a 0.045kg golf ball in order to launch it from the tee. For simplicity,assume that the average net force applied to the ball acts parallel to the ball's motion, has a magnitude of 6800N and in contact with the ball for a distance of 0.010m. with what ...
Wednesday, October 12, 2016 by kassy

Physics
A vector has negative x and y-components. The y-component is bigger than the x-component. Which of these is the only appropriate angle, measured from the +x axis, for this vector? Its either 190, 230, 125, 290, and 350. Im confused.
Wednesday, October 12, 2016 by Johnathan Zeringue

Physics(semiconductors)
Is electron and hole flow the same in a diode?is the following explanation correct .if not then please provide the correct one When diode is forward biased,the forward current is the sum of electron current and hole current.this current is diffusion current.the electron ...
Wednesday, October 12, 2016 by Plz help!!

physics
suppose if we put 5 kilogram weight on the each arm of a seesaw and it is in equilibrium position now if I apply 2 newton force on the corner of right arm of this seesaw side by side in horizontal direction then this force will be distributed equally or other arm weight will ...
Wednesday, October 12, 2016 by vikram

physics
The speed of sound in air is approximately 340 m/s. The speed of sound in steel is approximately 5900 m/s. If your friend strikes one end of a steel pipe with a hammer while you listen at the other end, you will hear two distinct sounds: one traveling through the air and the ...
Wednesday, October 12, 2016 by stuck

algebra homework help
A student missed 3 problems on a Physics test and received a grade of 94%. If all the problems were of equal value, how many problems were on the test? Round off your answer to the nearest integer. my answer is 5 questions
Wednesday, October 12, 2016 by jennifer

Physics
Hello, I had a question for physics, and I tried it out, however, I got the wrong answer. The Question:If a rock takes 0.750s to hit the ground after being thrown down from a height of 4.80m, determine the rock's initial velocity. My Work : The formula- d=vi*t+1/2*a*t^2 ...
Tuesday, October 11, 2016 by Abigail

Physics
An unknown substance at a temperature of 20 degrees Celsius is warmed up to 50 degrees when water at 80 degrees is added to it. Can I post this question. There is more information I have and the point is to find the specific heat of the unknown substance.
Tuesday, October 11, 2016 by Victor

physics
suppose a ball having 2 kilogram mass is closed in tube having 4 kilogram mass. what will be the velocity of 2 kilogram ball if we shake this tube side by side and this ball bounce back and rolling at the rate of .03 centimeter/second.
Tuesday, October 11, 2016 by vikram

Physics
A 50.0 kg skier with an initial speed of 12.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assuming a ...
Tuesday, October 11, 2016 by Zoe Jo

Physics
A particle moving at a velocity of 4.8 m/s in the positive x direction is given an acceleration of 3.4 m/s2 in the positive y direction for 4.4 s. What is the final speed of the particle? Answer in units of m/s.
Tuesday, October 11, 2016 by Holly

Physics
A 70 kg waterslide rider traveling at 15 meters per second hits a ramp with a 58 degree launch angle - How high will they fly?
Tuesday, October 11, 2016 by Paul

physics
a car starts from rest and accelerates uniformly to reach a speed of 21 m/s in 7.0s. What was the speed of the object after 2.0 seconds?
Tuesday, October 11, 2016 by liv

Physics
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 770 N and that of your belongings is 1040 N. Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.2 m) at a constant velocity. I solved...
Tuesday, October 11, 2016 by BrookeNeed

Physics
Josh is standing on the roof of the school 12 meters directly above James who kicks a soccer ball straight up with an initial velocity of 15 m/s. If Josh catches the ball on the way up, how long will the ball take to reach him? If he misses it on the way up and catches it on ...
Tuesday, October 11, 2016 by Jessica

Physics
Suppose Jessica drops a rock from a hot air balloon 200m above the water. how long does it take the rock to fall (a) the first 100 meters and (b) the second 100 meters?
Tuesday, October 11, 2016 by Jessica

Physics
A certain spring stores 35.0 J of potential energy when it is compressed by 9.2 cm. What is the spring constant?
Tuesday, October 11, 2016 by queck

Physics
Veronica hits a volleyball from a height of 0.4 m and gives it an initial velocity of 5.2 m/s straight up. a) How high, above the ground, will the volleyball go b) How long will it take the ball to reach its maximum height?
Tuesday, October 11, 2016 by Avery

physics
A fisherman is fishing from a bridge and is using a "51.0-N test line." In other words, the line will sustain a maximum force of 51.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in with an ...
Tuesday, October 11, 2016 by BrookeNeed

PHYSICS
a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they experience the same ...
Tuesday, October 11, 2016 by JERRY

Physics
Hello, my problem is the next one: There are three objects that are launched at the Same time But with different angles( they describe proyectile motion ) . All the objects got the Same maximun height. My question is: Is the Initial velocity the Same for the three objects? Why...
Tuesday, October 11, 2016 by Arthur

Physics
5 kg of water at 40 degree Celsius is poured on a large block of ice at 0 degree celsius. How much ice melts?
Tuesday, October 11, 2016 by Li

physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...
Tuesday, October 11, 2016 by shanel

physics
suppose a ball having 2 kilogram mass is closed in tube having 4 kilogram mass. what will be the velocity of 2 kilogram ball if we shake this tube at the rate of .03 centimeter/second.
Tuesday, October 11, 2016 by vikram

physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...
Tuesday, October 11, 2016 by shan

physics
Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 8600 km above the earth's surface.
Monday, October 10, 2016 by kassy

physics
Find the force of gravity (in newtons) on a spacecraft 15100 km above the earth's surface, if its mass is 400 kg
Monday, October 10, 2016 by kassy

physics
A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 92.5 cm. If its speed is 4.50 m/s, and its mass is 0.335 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.
Monday, October 10, 2016 by kassy

AP Physics
A 5-kg box is placed on a frictionless ramp which is sloped at a 30-degree angle from horizontal. A rope attaches the box to a post further up the ramp. How much tension is in the rope?
Monday, October 10, 2016 by Bri

physics
What is the maximum speed (in meters/second) with which a 1400 kg car can round a turn of radius 300 m on a flat road, if the coefficent of friction between tires and road is 0.530 ?
Monday, October 10, 2016 by kassy

Physics
A machine has an IMA of 6.0 and an AMA of 5.0. What is the work input needed by the machine to raise a 40 kg load by 3.0 m?
Monday, October 10, 2016 by April Hanna

physics
One athlete in a race running on a long, straight track with a constant speed v1 is a distance d behind a second athlete running with a constant speed v2. Find the time t it takes the first athlete to overtake the second athlete, in terms of d, v1, and v2. At what minimum ...
Monday, October 10, 2016 by victora

Physics
A 54100 kg space ship has completed two thirds of its journey from the earth to the Moon. At this position, what magnitude force would the ship's engines have to supply to be the equilibrant? Assume the mass of the moon is 7.35E + 22 kg and the distance between the earth ...
Monday, October 10, 2016 by Sally

physics
a child saw a skunk in a hole of a tree, standing 2.5m away. the child attempted to throw a pebble into the hole but missed with a speed of 11m/s. Angle of elevation is 75 degree, what was the Vfy of the pebble.
Monday, October 10, 2016 by matt

physics
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1170 N on the rope, what is the maximum speed (in meters/second) he can tolerate at the lowest point of his swing? His mass is 83.0 kg, and the vine is 18.0 ...
Monday, October 10, 2016 by kassy

PHYSICS
a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they experience the same ...
Monday, October 10, 2016 by Matt

Physics
A 221-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 27.7° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.811, and the log has an acceleration ...
Monday, October 10, 2016 by BrookeNeed

physics
A space station in the form of a large wheel, 173 m in diameter, rotates to provide an “ar- tificial gravity” of 6 . 6 m / s 2 for people located on the outer rim. Find the rotational frequency of the wheel
Monday, October 10, 2016 by Anonymous

physics
an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by why cant anyone solve this

physics
an 85kg concrete block rests on a flat surface with coefficient of static friction=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by solve this i will love you for ever

Physics
a 50ml volume of gas is measured at 20 degree celsius,if the pressure remains constant what will be the volume of the gas at 0 degree celsius?
Monday, October 10, 2016 by Vianca

Physics
This is a multiple choice question: You toss a (wrapped) sandwich to a friend leaning out of a window 10 m above you, throwing just hard enough for it to reach her. At the same instant, she drops a silver dollar to you.At what position do the dollar and the sandwich pass each ...
Monday, October 10, 2016 by Tori

physics (question impossible to solve)
an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
Monday, October 10, 2016 by help (sos)

  1. Pages:
  2. <<Prev
  3. 8
  4. 9
  5. 10
  6. 11
  7. 12
  8. 13
  9. 14
  10. 15
  11. 16
  12. 17
  13. 18
  14. 19
  15. 20
  16. 21
  17. 22
  18. Next>>

Homework Help: Science