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A 10000 kg train car A traveling at a speed of 24 m/s strikes an identical car B initially at rest. If the cars lock together as a result of the collision, calculate the amount of the initial kinetic energy is transformed into thermal or other forms of energy.
A small ball of 53 grams is suspended from a string of length 86 centimeters and whirled in a circle lying in the horizontal plane. If the string makes and angle of 31 degrees with the vertical, find out the centripetal force experienced by the ball...
A copper rod (length=2 m, radius=3×10-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a "spring," and the object oscillates vertically with small amplitude. Ignoring the rod's mass, determ..
A 100-watt light bulb is brighter than a 25-watt light bulb because it uses more power. Which bulb has a greater resistance, the 100-watt or the 25-watt light bulb
Assume the distance between the protons in the H2 molecule is 7.50 10-11 m. Find the energy of the fourth excited rotational state, with J = 4
An electron and a proton are each accelerated through a potential dierence of 10.0 MV. Are the particles moving at relativistic speeds
An ideal inductor of 14 mH has a sinusoidal voltage across it of amplitude 38. What is the amplitude of the sinusoidal current through the inductor
What is the current in the wire.
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
When the temperature of a thin silver [? = 19 × 10-6 (C°)-1] rod is increased, the length of the rod increases by 3.7 × 10-3 cm. By how much does the length of the gold rod increase
Find out the velocity of the plane relative to the earth.
At 12°C, a brass cube has an edge length of 25 cm. What is the increase in the cube's surface area when it is heated from 12°C to 97°C
A dentist's drill starts from rest. After 3.20 s of constant angular acceleration it turns at a rate of 2.3 104 rev/min. Find the drill's angular acceleration
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