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A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 9.0 m/s at the end of 3.0 s. At that instant, the kinetic energy of the system is 80 J and each mass has moved a distance of 13.5 m. Determine the values of m1 and m2.
A 1300kg sports car accelerates from 0m/s to 33m/s in 12s . What is the average power of the engine?
a 120 kg scaffold is 6.6 meters long. it is hanging with two wires one from each end. a 540 kg box sits 1 meter from
Photons of wavelength 65.0 pm are Compton-scattered from a free electron which picks up a kinetic energy of 0.95 keV from the collision
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 15.0 N. What is the volume of the object
A concrete highway is built of slabs 14m long (20 degrees Celsius). How wide should the expansion cracks between the slabs be
In the Bohr model, the electron is imagined to move in a circular orbit about a stationary proton. If the speed of the electron were7.9 multiplied by 105 m/s, what would be the corresponding orbital radius?
You lower a weight of metal in a beaker filled with water standing on a scale. When metal weight hangs above the water weighs 179.6 grams.
7 an x-ray tube is operating with energy of 16 keV the produced x-rays photon strike a target and are compton-scattered at an angle of 45 degrees, what is the energy of the scattered x-ray photon in ev
question an ice skater spins about a vertical axis through her body with her arms held out. as she draws her arms in
Two streams of air, one at 1 bar, 27C and velocity of 30 m/s and the other at 5 bar, 227C and 50 m/s velocity, Find the velocity of the stream issuing out of the nozzle
A current of 10^-14 A is produced in a free-air chamber operating under saturation conditions. The sensitive volume, in which electronic equilibrium exists, contains 0.22g of air. What is the exposure rate .
A circle of rope of total mass 1kg and radius 1m is spinning at angular velocity 2.5 rad/sec about an axis through the center of the circle
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