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A long thin rod of mass M = 2.00 kg and length L = 75.0 cm is free to rotate about its center as shown. Two identical masses (each of mass m = .413 kg) slide without friction along the rod. The two masses begin at the rod's point of rotation when the rod is rotating at 10.0 rad/s.
(a) When they have moved halfway to the end of the rod, how fast (rad/s) is the rod rotating?
(b) When the masses are halfway to the end of the rod, what is the ratio of the final kinetic energy to the initial kinetic energy (Kf /Ki)?
(c) When they reach the end, how fast is the rod rotating (rad/s)?
A beaker with a capacity of exactly 100mL contains 99.5mL of ethanol at 19degrees C. If it's temperature rises at what temperature will it overflow? (Ignore expansion of the beaker). The answer is not 23.6 degrees C so I am not sure how to figure it ..
A small turtle moves at a speed of 165 furlongs per fortnight. Find out the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fortnight = 14 days.
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
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Two masses are connected by a string. Mass A is on a flat roof and mass B is hanging over the edge of the roof. The mass on the roof is 15 kg and the hanging mass is 5 kg, how far along the roof does this mass move before stopping (the masses are s..
The uncertainty in an electron's position is 0.18 nm. What is the kinetic energy of an electron whose momentum is equal to this uncertainty
An aircraft carrier has a speed of 13.0 m/s relative to thewater. What is thefrequency of the sound heard by the crew on the ship
Three point charges, -5.85*10-9 C, -9.20*10-9 C, and +7.20*10-9 C, are fixed at different positionson a circle. The total electric potential at the center of thecircle is -2150 V. What is the radius of the circle?
Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.50cm, its potential energy is 0.0025 J. (a) what is the force constant of the spring? (b) What compression is needed for the spring potential energy to..
a helicopter is lifting two crates simultaneously. one crate with a mass of 148 kg is attached to the helicopter by
A segment of wire carries a current of 25 A along the x axis from x = -2.0 m to x = 0 and then along the z axis from z = 0 to z = 3.0m. What is the magnitude of the force on this segment of wire
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