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A disk of radius .3 meters and mass of .5kg is held over another disk of radius .5 meters and mass 1 kg which is rotating in a horizontal plane at a rate of 15.92 rev/sec. The top disk is released and drops onto the bottom disk (centers align).
a) What is the final angular velocity (in rev/sec) of the two disks?
b) What was the change in rotational energy of the two-disk system?
A traveler first drives 19.4 km east, then 29.7 km southeast, and finally 9.9 km south. Find the traveler's total displacement
A black wood stove has a surface area of 2.20 m2 and a surface temperature of 185° C. What is the net rate at which heat is radiated into the room
A person standing a certain distance from an airplane by four equally noisy jet engines is experiencing a sound level of 116 dB. What sound level would this person experience if the captain shut down all however one engine?
a particles have charges q1 -q2 450 nc and q3 -q4 95 nc and distance a 5.8 cm. what are the a x and b y components
A spherical balloon has a radius of 8.45 m and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of balloon have a mass of 1300 kg? Overlook the bouyant force on the cargo volume itself.
consider light from a helium-neon laser 632.8 nanometersstriking a pinhole with a diameter of 0.175mm . at what angle
A proton with a mass 1.67 × 10-27 kg moves with the speed of 0.6 00C in accelerator (c= 3.00 x 108 m/s). What is its kinetic energy
A beam of light in air strikes a glass lab at common incidence. The glass slab has an index of refraction of 1.50. (a) About what percentage of the incident light intensity is transmitted through the slab (in one side or out the other)? (b) Repeat Pa..
question a 4kg cart is initially moving at 3ms on a frictionless track. it then hits an incline and stops 2m later. a
A car is stopped at an intersection with a red light, and a biker (in a bike lane) with velocity "v" is approaching the car from behind. calculate the distance at which the biker catches the car
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.3 kg and contains 15 kg of water. A 1.0 kg piece of the metal initially at a temperature of 170°C is dropped into the water
A spring stretches 3.5-cm when a 5-g object is hung from it. The object is replaced by a block of mass 24 g that oscillates in simple harmonic motion. Compute the period of motion.
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