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A 10 lb. bowling ball rests on a shelf in a bowling alley. Another 10lb. ball sits on the floor below the shelf. Which of the bowling balls contains more gravitational potential energy?
Through a thunderstorm, 4.7s elapses between observing alighting flash and hearing the resulting thunder. About how far away in kilometres and miles was the lighting flash?
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
Kenny is dropped into a volcano. Stan and Kyle try to use a lift to save Kenny from rising lava. The efficiency of the motor is 0.4 and Kenny has a weight of 40kg. In order to save him, they must lift him 50 meters in 15 seconds. What is the faste..
A dolphin located in sea water at a temperature of 25°C emits asound directed toward the bottom of the ocean 175 m below. How much time passes before it hears anecho?
A 8.0-cm -diameter disk emits light uniformly from its surface. 20 cm from this disk. What is the diameter of the completely dark part of this shadow?
a two identical point charges of q 1.50 x 10-8 c are separated by a distance of 1.10 m. what is the minimum amount of
Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 13.0 m}/ s. How fast were the enmeshed cars moving just after the collision
A cue stick hits a cue ball with an average force of 23.8 N for a duration of 0.0246 s. how fast is it moving after being struck
A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.05 cm and is 2.15 m above the bottom of the tank. What is the gauge pressure in the outlet pipe
the electric field caused by a certain point charge has a magnitude of 6500rm nc at a distance of 0.180rm m from the
A solid marble, a solid disk and a hoop have the same mass (M = 0.9 kg) and the same radius. Each object is held at rest at the same height and then released. what is the force the track exerts on the hoop
Some of the earliest atomic models held that the orbital velocity of an electron in an atom could be correlated by the radius of the atom. If the radius of the hydrogen atom is 5.29*10-11 m and the electrostatic force is responsible for the circular ..
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