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You are on a bridge which is a height 30m above the water. You first drop a ball and then 1.5 seconds later throw a second ball down so that both balls hit the water at the same time. (assume the positive y-direction is up) Part A At what time after you release the first ball does it hit the water? Part B With what velocity must the second ball be thrown downwards? Part C What is the speed of the first ball just before it hits the water? Part D What is the velocity of the second ball just before it hits the water?
A large population of aloha users manage to create 50 request/sec,including both originals and retransmissions.time is slotted in units 40msec.
A light source, S, is located 2.60m below the surface of a swimming pool and 1.30m from one edge of the pool. The pool is filled to the top with water.
The diffraction pattern produced by the aperture is observed on a screen at a distance of 4 m from the aperture. The power density at the centre of diffraction pattern is measured to be 7 W/m2.
A 3.2 kg block of wood sits on a table. A 3g bullet, fired horizontally at a speed of 490 m/s, goes completely through the block, emerging at a speed of 250m/s. What is the speed of the block immediately after the bullet exits.
The bullet remains in the block, and after the impact the block lands d = 1.90 m from the bottom of the table. How much time does it take the block to reach the ground once it flies off the edge of the table.
At one instant a bicyclist is 35.0m due east of a park's flagpole, going due south with a speed of 20 m/s. Then, 19 s later, the cyclist is 60.0 m due north of the flagpole, going due east with the speed of 11 m/s. For the cyclist in this 19s inte..
Estimate the gravitational force between the Sun and Venus. The mass of the Sun is 1.99×10^30 kg. The mass of Venus is 48.7×10^23 kg. The distance between them is 10.8×10^10 m.
Draw a free body diagram for the skydiver in the instant after he jumps.(Assume that at this point his velocity is near zero so that air resistance is still negligible.)
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
A 13.00 g bullet travelling 236 m/s penetrates a 2 kg block of wood and emerges cleanly at 179 m/s. If the block is stationary on a frictionless surface as hit, how fast does it move after the bullet emerges.
Two 9cm diameter charged disks face each other, 25cm apart. Both disks are charged to - 80 nC.
What type of car was involved in the hit and run
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