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A boy tosses a coin straight up to 2.4m. Suppose the height whenthe coin leaves his hand is 1.1m. What was the initial speed of thecoin when it left his hand?
_____m/s
A toboggan approaches a snowy hill moving at 10.9 m/s. The coefficients of static and kinetic friction between the snow and the toboggan are 0.470 and 0.320, Find the acceleration of the toboggan as it is going up the hill
Two atmospheric sound sources A and B emit isotropically at constant power. find the ratio of the larger power to the smaller power
A simple harmonic oscillator with m=0.815 kg and total energy E=135 J has amplitude 1.35m, Find the maximum acceleration
Coulomb's Law A)When spheres are charged with a power supply, what is being controlled? How does this lead to a charge on the spheres? B)Why is it necessary to separate spheres as much as possible before charging them?
An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, What is the energy of the electromagnetic radiation
A ball of mass 0.40 kg is fired with velocity 140 m/s into the barrel of a spring gun of mass 2.1 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
An electric field is E = 400 N/C i for x > 0 and E = -400 N/C i for x
A lifeguard sits on his watchtower at the edge of the pool at a height h=2.0m above the surface of the water. What is the depth of the pool at the location of the watch
The drawing shows three different resistors in two differentcircuits. The battery has a voltage of V = 27 V,and the resistors have resistancesof R1 = 50.0Ω,R2 = 25.0 Ωand R3 = 10.0 Ω. Determine the current through and the voltage across each resist..
A 101 Frisbee is 22 in diameter and has about half its mass spread uniformly in a disk and the other half concentrated in the rim. What is the magnitude of the torque
A 17-cm-long microscope has an eyepiece with a focal length of 3.1cm and an objective with a focal length of 0.35cm. What is the approximate magnification
a rocket initially at rest on the ground accelerates straight upward from rest with constant acceleration 44.1ms2 . the
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