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A proton is located at a distance of 0.420 m from a point charge of +8.30 micro coulombs. The repulsive electric force moves the proton until it is at a distance of 1.58 m from the charge. Assume that the electric potential energy lost by the system is carried off with a photon that is emitted through the process. What is its wavelength?
A sledge loaded with bricks has a total mass of 17.2 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. What is the mechanical energy lost due to friction
A coil with 25 turns of a square shape of 1.80 cm on each side. Find the magnitude and direction of the induced current in the coil
A belt wraps around a pulley of radius 7.3 cm that drives the compressor of an automobile air conditioner. How much work is done by the belt on the compressor during one revolution of the pulley
An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. What is the initial speed of the apple
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
A tennis player swings her 1000 g racket with a speed of 12.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 10.0m/s, What is the target's speed just after the bullet emerges
When light with a wavelength 480 nm or shorter shines on a metal surface, a current is measured. A. What is the work function of this metal B. What is the maximum kinetic energy an electron will have if violet light (380 nm) shines on the surface
A tennis player swings her 1000 g racket with a speed of 8.00m/s . She hits a 60 g tennis ball that was approaching her at a speed of 13.0m/s, How fast is her racket moving immediately after the impact
A 12.0 kg watermelon is at rest upon a ramp that is raised to an angle of 27.0o. find the vertical component of the force of gravity
a piano string having a mass per unit length equal to 4.00 times 10-3 kgm is under a tension of 1100 n. find the speed
A block rests on the frictionless horizontal surface and is attached to a spring. While set into simple harmonic motion, block oscillates back and forth with an angular frequency of 6.5 rad/s.
4 moles of a monatomic ideal gas occupy a volume of 23 cm3 at a pressure of 5 atm. the volume is changed to 89 cm3.a if
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