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A child throws a ball downward from a tall building. Note that the ball is thrown, not dropped and disregard air resistance. What is the acceleration of the ball immediately after it leaves the child's hand?
Two spherical asteroids have the same radius R. Asteroid 1 has mass M and asteroid 2 has mass 2M. What is the speed of each asteroid just before they collide
A current of 13.9 A flows through an electric heater operating on 120 V. What is the heater's resistance
A transformer is constructed that has 120 turns of wire on the primary side and 430 turns of wire on the secondary (load) side. what is the AC current measured on the secondary side
If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.17o. What is the spacing between reflecting planes in the crystal
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool, How long was the ball flight
An initially stationary 2.3 kg object accelerates horizontally and uniformly to a speed of 22 m/s in 3.2 s. (a) In that 3.2 s interval, how much work is done on the object by the force accelerating it
A bullet is shot straight up into the air. It takes 30.5 s for the bullet to go straight up and fall back straight down to its starting position. At what initial speed (in m/s) was the bullet shot into the air
Esitmate the change in temperature of 5 m^3 of air, to an increase in pressure of 50 kPa. The initial temperature of the air is 15*C at atmospheric pressure
In a volcanic eruption, a 2.40 × 103 kg boulder is thrown vertically upward into the air. Where will the other fragment land
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
If the end of the crutch is a circle of radius 1.0 without the tip, by what factor does the tip reduce the pressure exerted by the crutch
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. how many antinodes are in the standing wave
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