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A worker drives a 0.500 kg spike into a rail tie by a 2.50kg sledgehammer. The hammer hits the spike with a speed of 65.0m/s. If one-third of the hammer's kinetic energy is converted to the internal energy of the spike and hammer, how much does the total internal energy increase.
A 1000kg car traveling at a speed of 40m/s skids to a halt on wet concrete where the friction force is 6000N
A solid conducting sphere (radius=.05) has a charge of 0.25nC distributed uniformly on its surface. If point A is located at the center of the sphere and point B is 15cm from the center, what is the magnitude of the electric potential difference bet..
An electron is 10 cm to the left of a +2 C point charge, and 10 cm to the right of a -2 ?C point charge. The +2 C and the -2 C charges are fixed in position and together with the electron lie along the x-axis.
A hydrogen atom has an ionization energy of 13.6 ev. An electron in the n = 4 state makes a transition to the n = 2 state. What is the wavelength of the emitted photon?
A flexible chain weighing 37.0 N hangs between two hooks located at the same height. Find the magnitude of the force each hook exerts on the chain
The resistor has a value of 10ohms, and the capacitor is 500uF. Calculate the time constant of the circuit. What is the voltage across the capacitor after the switch has been closed for one time constant
A boat moves through the water with two forces acting on it. One is a 1800 N forward push by the water on the propeller, What will its velocity be at the end of that time
an object is initially moving with a speed of 10.0 ms in the direction 60.0 degrees n of e. ten seconds later the
The Sun is approximately a sphere of radius 6.963 105 km, at a mean distance a = 1.496 108 km from the Earth. calculate its surface temperature
A two-stage rocket moves in space at a constant velocity of +4940 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1000-kg upper stage is +5930 m/s.
An object placed 2.6 meters in front of a mirror produces an inverted image of one half the size. find Is it convex or concave
A cosmic ray travels 60km through the earth's atmosphere in 450us , How long does the journey take according to the cosmic ray
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