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Alice drops a rock to a well. She hears the splash of the rock 4.1 seconds later. The speed of sound is 340 m/s. How deep is the well?
A ship carrying freshwater to a desert island in the Caribbean, hasa horizontal cross-sectional area of 2600m^2 at the waterline. How much water was delivered
A wedge with mass rests on a frictionless horizontal table top. A block with mass is placed on the wedge, find the horizontal component of the acceleration of the wedge
two positive point charges q1 16 micro coulombs and q2 4 micro coulombs are seperated in a line by a distance of 3
A thin circular hoop of mass 1.00 kg and radius 2.00 m is rotating round an axis during its center a perpendicular to its plane. It is slowing down at the rate of 7.00 rad/s2. What is the net torque acting on the hoop?
For the RL circuits a simple RL circuit let the inductance be 3.0H, the resistance 7.50 and the battery emf at 36v. At t=0 the switch is closed. After a very long time what is the voltage across the Inductor
External work equal to 4x10-7 J is needed to move a -5 nC charge at constant speed to a point at which the potential is - 20 V. What is the potential at the initial point
A 80.1-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.77 rad/s. Find the angular velocity of the platform with its load
An airplane is flying during a thundercloud at a height of 2100 m. (This is a very dangerous thing to do because of updrafts, turbulence, and the possibility of electric discharge.) If a charge concentration of +50.0 C is above the plane at a height ..
A football player punts the ball at a 49° angle. Without an effect from the wind the ball would travel 68.0 meters horizontally. What is the initial speed of the ball
A 13000 kg railroad car travels alone on a level frictionless track with a constant speed of 17 m/s. A 6500 kg load, originally at rest, is dropped onto the car. What will be the car's new speed.
You put a kettle on to boil and forget about it so that all the water boils away. what is the change in entropy of the water once it has all turned to steam
Blocks A (mass 2.00kg ) and B (mass 10.50kg ) move on a frictionless, horizontal surface. Find the maximum energy stored in the spring bumpers and the velocity of each block at that time
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