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A 0.145-kg baseball pops straight up from the ground at 21.4 m/s.
(a) What maximum height does it reach?
(b) Find the work done by gravity on the baseball during its upward flight.
(c) Find the work done by gravity for the entire round trip, from launch to when the ball hits the ground.
A movig particle encounters an external electric field that decreases its kinetic energy from 9740 eV to 5690 eV as the particle moves from position A to position B. Determine the charge of the particle
A 255 kilogram piano slides 4.2 meter down a 30 degrtee incline and is kept from accelerating by a person who is pushing back on it parallel to the incline. estimate the work done by the man on the piano
A horizontal string can transmit a maximum power P0(without breaking) if a wave with amplitude A and angular frequency? is traveling along it. Determine the max power that can be transmitted
a drinking fountain projects water at an initial angle of 50 degrees above the horizontaland the water reaches a
A single 6.3 μF capacitor is connected across the terminals of a 60 Hz voltage source, what is the capacitive reactance of the capacitor
During the "heavy bombardment" period of our solar system astroids slammed into earth with large speeds thus resluting in earth becoming warmer. What form did the energy take before it was heat
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. But she does have devices to measure distance and time accurately. What is the mass of this canister
a 15 ohm toaster a 12 ohm clothes iron and a 320 ohm lamp are turned on simultaneously in parallel on a typical 110 v
When its 75kW engine is generating full power, a small single engine airplane with a mass of 700 kg gains altitude at a rate of 2.5 m/s. what fraction of the engine power is being used to make the air plane climb.
A student holds a tuning fork oscillating at 260 Hz. He walks towards a wall at a constant speed of 1.16 m/s. How fast must he walk away from the wall to observe a beat frequency of 4.50 Hz
when a 100ohm resistor is connected to a battery of emf e and internal resistance of r the battery delivers a power of
A parallel plate capacitor (air filled) that is maintained at a 20.0 V potential difference between plates, Calculate the surface charge density, and the charge on each plate
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