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A force of 20 N holds an ideal spring with a 1-N/m spring constant in compression. The potential energy stored in the spring is?
what is the index of refraction of the jelly? 2 glass plates are parallel and between is jelly 0.015mm thick. the glass has an index of refraction 1.53, the plates are each 8.00 cm long, 10 dark fringes are 6.33mm apart. wave length is 525nm .
A sperical source ratiates sound uniformly in all directions. At a distance of 18m, the sound intensity level is 100dB. what power is radiated by this source
A 12 kg weather rocket generates a thrust of 250 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 560 N/m, is anchored to the ground. What is the rocket's speed while the s..
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop.
A 9 V battery is rated at 80 Ah. It can deliver a current of 80 A for one hour, or a current of 40 A for 2 hours, etc. What is the total energy stored in the battery
The concepts for finding the change in length of a rod.
Expalin by how much does the potential energy of a 18.0-kg child increase when the child climbs a normal staircase to the second floor?
X rays with initial wavelength 6.60×10?2nmundergo Compton scattering. What is the largest wavelength found in the scattered x rays
Four point charges have the same magnitude of 2.53 x 10^-12 C and are fixed to the corners of a square that is 4.15 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists ..
Explain how much work is used to raise A to height h? What happens to the kinetic energy of B if its speed is doubled?
In a television, electrons shoot down the picture tube and strike fluorescent material on the screen, causing light to be emitted and producing the picture. assume that a certain set, the electrons are accelerated from rest 2.0 x 10^8 ms-1 in abou..
What is the centripetal force that would be required to keep a 4.0 kg mass moving in a horizontal circle with a radius of 0.80 meters at a speed of 6.0 meters/second?
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