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April 24, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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physics
You exert a larger force on the cart than the cart exerts on you. T/F When you stop pushing, the cart will continue moving at the same speed. T/F While the cart is pushed, it has a constant acceleration. T/F
Monday, February 17, 2014 at 6:37pm

physics
• If you use a cart with half the mass, you reach _______final speed. • If you use half the force, you reach ______ final speed. • If you push twice as long, you cover _______ distance during pushing. • If you use a cart with half the mass, you cover_______...
Monday, February 17, 2014 at 6:35pm

Physics
If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
Monday, February 17, 2014 at 6:02pm

Physics
A pot containing 2 liters of 5 celsius water is putt on a stove that is 1500 watts. Now the stove is on. How long time will it take for all of the water to boil from the pot? (turn into vapour). No heat is lost to the surroundings.
Monday, February 17, 2014 at 5:16pm

physics
The Achilles tendon is attached to the rear of the foot as shown in (Figure 1) . A person elevates himself just barely off the floor on the "ball of one foot." Assume the person has a mass of 80kg and D is twice as long as d.Find the tension FT in the Achilles tendon...
Monday, February 17, 2014 at 5:03pm

Physics
A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules
Monday, February 17, 2014 at 5:00pm

Physics
A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J
Monday, February 17, 2014 at 4:25pm

physics
a rope breaks when the tension exceeds 30.0n. what is the minimum acceleration downard that a 60.0n load can have without breaking the rope
Monday, February 17, 2014 at 3:54pm

Physics
You are going to toss a rock straight up into the air by placing it on the palm of your hand(you are not gripping it) then pushing your hand up very rapidly. Draw a free body a diagram for the rock for each situation, and write the sum of equation based on the free body ...
Monday, February 17, 2014 at 3:40pm

Physics
Some insects can walk below a thin rod (such as a twig) by hanging from it. Suppose that such an insect has mass m and hangs from a horizontal rod as shown in the figure, with angle θ = 37°. Its six legs are all under the same tension, and the leg sections nearest the...
Monday, February 17, 2014 at 2:49pm

Physics
A cannon fires a free projectile at an angle 85 from the ground. The cannonball has a speed of 150 m/s and it is launched from a hill 20 m above the plain where it will land 1. What is the x component of the cannonballs initial velocity 2. What is the y component of the ...
Monday, February 17, 2014 at 2:43pm

Physics
A cannon shoots a cannonball with an initial speed of 25 m/s at an angle 13. 1. What is the x component of the cannonballs initial velocity Vox? 2. What is the y component of the cannonballs initial velocity Voy? 3. What will be Vy, the y component of the cannonballs final ...
Monday, February 17, 2014 at 2:34pm

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Monday, February 17, 2014 at 2:26pm

Physics
A container contains 15 liters af water at 96 celsius. A 1 kg of ice cube at -20 celsius is dropped into the water. No heat is lost to the surroundings. What will the final mixing temperature be?
Monday, February 17, 2014 at 12:39pm

Physics
four similar cars having same mass are running at the same speed on the same speed and when breaks are applied at the same time the cars cover distance of 5m, 5.5m, 4.8 and 5.2 m. In which car the friction between the brake pads and disc is maximum
Monday, February 17, 2014 at 11:18am

Physics
A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. If the ball leaves her club with a velocity of 46.0 m/s at an angle 0f 35.0º above the ground, find the time that the ball is in the air before it hits ...
Monday, February 17, 2014 at 10:52am

physics
1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the building 30 m above ...
Monday, February 17, 2014 at 6:36am

Please Help with 2 Physics Problems???
1) In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force FA of magnitude 207 N, and Charles pulls with force FC of ...
Monday, February 17, 2014 at 1:18am

Physics
A 55 kg box is pulled with constant speed across the floor with a rope that is at an angle of 40 degrees above the horizontal. If the tension in the rope is 125n what is the coefficient of friction between the box and the floor?
Monday, February 17, 2014 at 12:24am

Physics
The work function of a material is 3.5 eV. If the material is the illuminated with monochromatic light (l = 300 nm), what are: a) the stopping potential b) the cutoff frequency
Sunday, February 16, 2014 at 9:17pm

Physics
A physics book slides off a horizontal table top with a speed of 1.30 m/s . It strikes the floor after a time of 0.380s . Ignore air resistance. Find the height of the table top above the floor. Find the horizontal distance from the edge of the table to the point where the ...
Sunday, February 16, 2014 at 9:11pm

Physics
An electron with speed 2.35×107m/s is traveling parallel to a uniform electric field of magnitude 1.16×104N/C . How far will the electron travel before it stops? A=0.135m How much time will elapse before it returns to its starting point? I solved for the time it ...
Sunday, February 16, 2014 at 9:00pm

Physics
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 40.0 m, and the heights of the Jackson and Walton buildings are, respectively, ...
Sunday, February 16, 2014 at 8:40pm

physics
A 45.4 kg sign is hanging in two wires as illustrated below. If angle A is 53.5 degrees and angle B is 29.6 degrees, what is the tension in the left wire? Give your answer in newtons
Sunday, February 16, 2014 at 8:35pm

physics
Two parallel plates separated by a distance of 2.0 x 10^-2 meter are charged to a potential difference of 1.0 x 10^2 volts. Points A, B, and C are located in the region between the plates. Calculate the magnitude of the electric field strength between the plates.
Sunday, February 16, 2014 at 7:27pm

physics
An automobile tire has a pressure of 325 kPa when the temperature is 10 degrees Celsius. If the temperature of the tire rises to 50 degrees Celsius and its volume is constant,what is the new pressure?
Sunday, February 16, 2014 at 7:26pm

Physics
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 60° when they move past the window, as the ...
Sunday, February 16, 2014 at 7:06pm

physics
A proton has a charge of e= 1.6 x 10^-19 C. (a.) Calculate the electric field produced by the proton 10 cm away. (b.) what is the magnitude of the electric potential at the same position (10cm)?
Sunday, February 16, 2014 at 6:19pm

physics
Two parallel plates separated by a distance of 2.0 x 10^-2 meter are charged to a potential difference of 1.0 x 10^2 volts. Points A, B, and C are located in the region between the plates. Calculate the magnitude of the electric field strength between the plates.
Sunday, February 16, 2014 at 4:47pm

Physics
An artillery shell is fired at an angle of 55.7◦ above the horizontal ground with an initial speed of 1690 m/s. The acceleration of gravity is 9.8 m/s^2. a.Find the total time of flight of the shell, neglecting air resistance. Answer in units of min. b.Find its ...
Sunday, February 16, 2014 at 4:17pm

physics
A softball having a mass of 0.29kg is pitched at 97km/h . By the time it reaches the plate, it may have slowed by 8.0%. Neglecting gravity, estimate the magnitude of the average force of air resistance during a pitch, if the distance between the plate and the pitcher is about ...
Sunday, February 16, 2014 at 2:43pm

physics
How far from Earth will Venus be today?
Sunday, February 16, 2014 at 2:14pm

physics
A block with a mass of 1.0kg is lifted up slowly from ground (0m) to height of 0.51m. block is slowly displaced horizontally by .10m. find total work done to displace block vertically and horizontally. Then find total work to lift block and move it horizontally.
Sunday, February 16, 2014 at 11:46am

physics
what forms of energy does pendulm have/
Sunday, February 16, 2014 at 8:47am

physics
A cart on a horizontal, linear track has a fan attached to it. The cart is positioned at one end of the track, and the fan is turned on. Starting from rest, the cart takes 4.22 s to travel a distance of 1.44 m. The mass of the cart plus fan is 350 g. Assume that the cart ...
Sunday, February 16, 2014 at 6:51am

Physics
calculate the work required to launch a satellite from the surface of the earth (radius6380km) to orbit 6000 km above the surface
Sunday, February 16, 2014 at 4:46am

Physics
Your potato gun has a muzzle velocity of 34 m/s. You want to shoot a potato and have it strike the ground 2.4 seconds later. At what elevation do you have to fire the gun?
Saturday, February 15, 2014 at 11:34pm

PHYSICS
You shoot your potato gun horizontally from shoulder height, which is 190 cm. The potato lands 15 m away from you. You would like the potato to go 90 m, so you climb up a ladder and fire the gun horizontally from there. How high over the ground must the gun be?
Saturday, February 15, 2014 at 11:31pm

physics
You are holding the neck of a champagne bottle at an elevation of 27 degrees when you pop the cork. The highest point in the cork's flight is 3.5 m above its initial height. What was the cork's initial speed? Use SI units in the second box.
Saturday, February 15, 2014 at 11:29pm

Physics
A coin is dropped from a hot-air balloon that is 325 m above the ground and rising at 12.5 m/s upward. For this problem use a coordinate system in which up is positive. Find the maximum height reached for the coin in meters
Saturday, February 15, 2014 at 11:07pm

Physics
4. A basketball is thrown from a height of 1.60(m), with an angle of 45o above the horizontal. (a) With what initial speed must the basketball be thrown so that it reaches the basket at the highest point of its trajectory? The basket is at a height of 3.05(m) above the ground...
Saturday, February 15, 2014 at 9:30pm

Physics
The radius of the moon is approximately one quarter of the earth's radius,and its mass is on eightieth of the earth's mass.Calculate the weight of a man with a mass of 80KG on the surface of the moon
Saturday, February 15, 2014 at 9:26pm

physics
What is the magnitude of electrostatic force that acts on each sphere?
Saturday, February 15, 2014 at 7:42pm

Physics
You are on an airplane traveling 30° south of due west at 130 m/s with respect to the air. The air is moving with a speed 30 m/s with respect to the ground due north. One question.. 2) What is the heading of the plane with respect to the ground? (Let 0° represent due ...
Saturday, February 15, 2014 at 6:59pm

Physics
If a frictionless incline has a difference in height from one end to the other of 19.5 cm and has a length along the incline of 1.36 m, find the time it takes for a block of 1.1 kg, starting from rest, to slide down the ramp from the top to the bottom of this incline.
Saturday, February 15, 2014 at 6:38pm

Physics Help
A constant force of 100N , directed upward, is applied to a 5.0kg toy rocket by the rocket's engine. What is the rocket's acceleration? I used the equation a= F/m to get 20 m/s2 but it was wrong and I don't know where to go from here still?
Saturday, February 15, 2014 at 6:21pm

RE: Physics
If an incline has a difference in height from one end to the other of 17.8 cm and has a length along the incline of 1.19 m, what is the angle that the incline makes with the horizontal reference surface? Physics - Damon, Saturday, February 15, 2014 at 5:20pm cos (angle) = .178...
Saturday, February 15, 2014 at 5:58pm

Physics
If an incline has a difference in height from one end to the other of 17.8 cm and has a length along the incline of 1.19 m, what is the angle that the incline makes with the horizontal reference surface?
Saturday, February 15, 2014 at 4:39pm

Physics
The gravitational force exerted on a baseball is 2.28 N down. A pitcher throws the ball horizontally with velocity 12.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 177 ms. The ball starts from rest. (a) Through what distance does it...
Saturday, February 15, 2014 at 2:06pm

physics
A truck with 0.385 m radius tires travels at 44.5 m/s. At how many radians per second are the tires rotating?
Saturday, February 15, 2014 at 1:55pm

Physics Total Mechanical Energy
What is the total mechanical energy of a 575 kg roller coaster that is at rest 50.0 m above the lowest point on the ride? The maximum possible speed of the roller coaster is 31.3 m/s. (do not include units in your answer)
Saturday, February 15, 2014 at 11:50am

Physics
A constant force of 100N , directed upward, is applied to a 5.0kg toy rocket by the rocket's engine. Find the rockets acceleration? I thought it'd be as simple as F=ma to be 20 m/s2 but I was wrong. What am I overlooking?
Saturday, February 15, 2014 at 2:28am

Physics
An 80 kg hiker climbs a 1000 m high hill at a constant speed. If the hiker's body is 25% efficient, how many kg of fat does the hiker burn in climbing the hill? Given: heat of reaction of body fat is 37000 kilo joules per kilogram. I know that change in potential energy is...
Saturday, February 15, 2014 at 2:04am

Physics
A rower whose speed of rowing is u crosses a river of width s to a point exactly opposite. Find the time of the journey if the speed of the stream is V( less than u)
Friday, February 14, 2014 at 8:47pm

physics
A snowmobile is originally at the point with position vector 28.7 m at 95.0° counterclockwise from the x axis, moving with velocity 4.85 m/s at 40.0°. It moves with constant acceleration 1.94 m/s2 at 200°. After 5.00 s have elapsed, find the following: (a)Its ...
Friday, February 14, 2014 at 8:22pm

physics
A 5.2 kg projectile is launched from a launching device. It leaves the launcher traveling at 4000 m/s. The net force during the launch was equal to 4.3×105 Newtons. How much time did the project spend in the launcher?
Friday, February 14, 2014 at 7:50pm

Physics
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.1 m/s at an angle of 44.0° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
Friday, February 14, 2014 at 3:45pm

Physics
two objects attract each other gravitationally with a force of (2.5)(10^-10)N when they are 0.25m apart. Their total mass is 4.0 kg. Find their individual masses.
Friday, February 14, 2014 at 1:52pm

physics
A boat crosses a river of width 98.4 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e.,the direction in which the boat points) perpendicular to the river and a throttle settingto give a constant speed of 2.11 m/s relative to the water...
Friday, February 14, 2014 at 12:17pm

physics
A golf ball with a mass of 48.0 g can be blasted from rest to a speed of 69.4 m/s during impact with a club head. Assume that the impact lasts only about 1.010 ms. Calculate the change in momentum of the ball. Calculate the average force applied.
Friday, February 14, 2014 at 12:15pm

physics
A 1200kg car travels at a constant speed of 12 m/s around a horizontal, circular track with a radius of 45m. What is the magnitude of the centripetal for
Friday, February 14, 2014 at 12:03pm

Physics
Find the magnitude of vector C (i.e. the sum of |A+B|) using the following values: |A|=5m, |B|=3m, α=22∘, β= 42.5∘.(? meters)
Friday, February 14, 2014 at 11:33am

Physics
A pizza slides off a slanted roof as shown. (α = 23 deg) When it leaves the roof (h = 5.4 m) and begins its free fall motion, it is traveling at 0.9 meters per second. Find the location on the ground where the pizza lands. (Consider the edge of the building the origin)(? m)
Friday, February 14, 2014 at 10:07am

Physics
A baseball is hit with a velocity of 30m/s at an angle of 38.3 degrees above the horizontal. An outfielder, who happens to be very good at 2D kinematics, figures out exactly where it's going to land. Knowing he is exactly 8 meters away from the landing point, and that his ...
Friday, February 14, 2014 at 10:06am

Physics
I threw a rock straight up with a speed of 20 m/s. I happened to be standing over a well when I threw it, so when instead of landing on the ground, it falls into the well. The surface of the water in the well is 5 meters below point when the rock left my hand. How long is it ...
Friday, February 14, 2014 at 10:04am

Physics
1. Consider four vectors ~F1, ~F2, ~F3, and ~F4, where their magnitudes are F1= 57 N, F2= 38 N, F3= 25 N, and F4= 67 N. Let θ1= 130◦, θ2=−130◦, θ3= 29◦, and θ4=−64◦, measured from the positive x axis with the counter-...
Friday, February 14, 2014 at 1:47am

Physics
Consider four vectors ~F1, ~F2, ~F3, and ~F4, where their magnitudes are F1= 57 N, F2= 38 N, F3= 25 N, and F4= 67 N. Let θ1= 130◦, θ2=−130◦, θ3= 29◦, and θ4=−64◦, measured from the positive x axis with the counter-...
Friday, February 14, 2014 at 1:45am

Physics
The rectangular and polar coordinates of a point are (x, y) and (r, θ), where x= 4 and θ= 46◦. a. Determine the value of r. b. Determine the value of y.
Friday, February 14, 2014 at 1:42am

Physics
In a laboratory experiment, one end of a horizontal string is tied to a support while the other end passes over a frictionless pulley and is tied to a 2.6kg sphere. Students determine the frequencies of standing waves on the horizontal segment of the string, then they raise a ...
Friday, February 14, 2014 at 1:06am

Projectile physics
The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and its mass is about 4.68 ✕ 10-26 kg. (a) If it takes 3.80 ✕ 10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (...
Thursday, February 13, 2014 at 11:19pm

physics
a boy standing on the tray of a utility travelling at 5 ms throws aa ball vertically upwads with a velocity of 7.35ms (relative to himself) and catches it again at the same level. what horizontal distance does the ball move while it is in the air
Thursday, February 13, 2014 at 10:50pm

physics 1
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...
Thursday, February 13, 2014 at 10:50pm

physics
If you shook the end of a rope up and down 7 times each second, what would be the period of the waves set up in the rope? s What would be the frequency? Hz
Thursday, February 13, 2014 at 10:45pm

Physics
Henry is driving to visit his friend Susan. For 126 miles of the trip, he can take the highway, which has a speed limit of 65 miles per hour. Henry is in a rush though, and instead travels at 70.6 miles per hour. How many minutes does he save driving faster?
Thursday, February 13, 2014 at 10:29pm

Physics
Calculate the gravitational force between the Sun and Saturn. The mass of the Sun is 1.99×1030 kg. The mass of Saturn is 5680×1023 kg. The distance between them is 143×1010 m. In Newtons
Thursday, February 13, 2014 at 10:01pm

physics
A truck is pulling a car. FT is the magnitude of the force that the truck exerts on the car FC is the magnitude of the force that the car exerts on the truck Consider the following scenarios independently. 1)The truck is driving with a constant velocity, but as it turns out, ...
Thursday, February 13, 2014 at 8:45pm

Physics
If the electrical potential in a region is constant, the electric field must be zero everywhere in that region. True False
Thursday, February 13, 2014 at 8:45pm

Physics
If the electric field is zero everywhere inside a region of space, the potential must also be zero in that region. TRUE or FALSE, WHY?
Thursday, February 13, 2014 at 8:44pm

physics
A spring of force constant 655 N/m is used to launch a 5.25 kg mass from the edge of a frictionless table that is 1.20 m above the floor. How far horizontally away from the table will the mass land if the spring was compressed 42.0 cm before launching?
Thursday, February 13, 2014 at 8:12pm

physics
A)An object at rest has no forces acting on it. B)An object can be moving in one direction while the net force acting on it is in another direction. C)In order to move a massive crate sitting on the floor, the force you apply to the crate has to overcome the force of the crate...
Thursday, February 13, 2014 at 8:11pm

Physics
A river has a steady speed of 0.500 m/s.A student swims upstream a distane of 1.00 km and swims back to the starting point. If the student can swim at a speed of 1.20 m/s in still water, how long does the trip take? How much time is required in still water for the same length ...
Thursday, February 13, 2014 at 4:14pm

physics
Two hockey players strike a puck of mass 0.159 kg with their sticks simultaneously, exerting forces of 1.30 103 N, directed west, and 9.90 102 N, directed 30.0° east of north. Find the instantaneous acceleration of the puck.
Thursday, February 13, 2014 at 2:35pm

Physics
The peak wavelength and observed color of a 50,000 K star is 58nm and too blue to see with the human eye. True or False.
Thursday, February 13, 2014 at 2:03pm

physics
A hydrogen atom in an excited state emits a Balmer beta photon followed by a Lyman alpha photon. The electron decayed from the third excited state to the first excited state to the ground state. True or False.
Thursday, February 13, 2014 at 1:14pm

Physics
A 254kg box is pulled at a constant speed by the little engine. The box moves a distance of 3.0 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?) what is the answer in joules?
Thursday, February 13, 2014 at 12:19pm

physics
If the voltage drop across each light bulb is the same, what can we say about the resistance of each of the light bulbs?
Thursday, February 13, 2014 at 12:12pm

Physics
A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high, standing on a horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which the ball must be thrown.
Thursday, February 13, 2014 at 12:02pm

physics
a force of 890n acts on a body that weighs 265n if the body starts from rest, how fast will it be going after it has moved 3.00m
Thursday, February 13, 2014 at 9:59am

physics
if the capacitance meter applies a voltage of 3.0 V across the plates and reads a capacitance of 30 pF, what is the charge on the plates?
Thursday, February 13, 2014 at 1:12am

physics
A 71.0 kg diver steps off a diving board and drops straight down into the water. The water provides an upward average net force 1110 N. If the diver comes to rest 4.1 m below the water's surface, what is the total distance between the diving board and the diver's ...
Wednesday, February 12, 2014 at 10:59pm

physics
A concave mirror has a radius of curvature of 0.975 m. An object is placed 2.08 m in front of the mirror. What is the position of the image?
Wednesday, February 12, 2014 at 7:54pm

Physics
The above spring has a spring constant of 29 N/m. The μ between the box and the surface is 0.3. The box has a mass of 1 kg. What is the maximum distance that the spring can be stretched from equilibrium before the box begins to slide back?
Wednesday, February 12, 2014 at 7:03pm

physics
An X-ray tube used for cancer therapy operates at 4.04 MV with a beam current of 23.4 mA striking a metal target. Calculate the power of this beam.
Wednesday, February 12, 2014 at 6:18pm

PHYSICS
A 200g block slides back and forth on a frictionless surface between two springs, as shown. The left-hand spring has k = 130 N/m and its maximum compression is 16cm. The right-hand spring has k = 280 N/m. Find (a) the maximum compression of the right-hand spring and (b) the ...
Wednesday, February 12, 2014 at 5:57pm

PHYSICS
A roller coaster powered by a spring launcher follows a frictionless track as shown below. The roller coaster cart has a mass of 500 kg, and the spring launcher has a spring constant of 1500 N/m. d. What is the fastest speed the cart reaches anywhere on the track?
Wednesday, February 12, 2014 at 5:41pm

physics
A rocket moves upward, starting from rest with an acceleration of 26.3 m/s2 for 3.91 s. It runs out of fuel at the end of the 3.91 s but does not stop. How high does it rise above the ground?
Wednesday, February 12, 2014 at 5:39pm

physics
A)Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.60 kg, the heavier box has a mass of 7.65 kg. Calculate the contact force between these boxes when a horizontal force of 4.83 N is applied to the light box. B)Calculate the contact ...
Wednesday, February 12, 2014 at 5:31pm

physics
After falling from rest at a height of 31.5 m, a 0.564 kg ball rebounds upward, reaching a height of 20.2 m. If the contact between ball and ground lasted 1.80 ms, what average force was exerted on the ball?
Wednesday, February 12, 2014 at 5:28pm

physics
A stereo speaker represented by P in the figure below emits sound waves with a power output of 114 W. What is the intensity of the sound waves at point x when r = 11.8 m?
Wednesday, February 12, 2014 at 5:21pm

physics
a ball bounces three times before it is caught. it initially falls 5 m, then rises back up to 4m, then falls 4m, rises back up to 3m, then falls 1.5m where it is caught. what is the balls displacement from its original position 5m above the ground?
Wednesday, February 12, 2014 at 5:06pm

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