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Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.50 cm, its potential energy is 0.0025 J. a) What is the force constant of the spring? (b) What compression is required for the spring potential energy to equal 0.0084 J?
Unpolarized light with an intensity of 650 W / m2 is incident on a polarizer with an unknown axis. What is the angle between the axes of the polarizers
A source of electromagnetic waves radiates power uniformly in every direction at a single frequency. Evaluate the average power radiated by the source
An interferometer is set up to carefully measure changes in length. The laser source has a wavelenth of 632nm and the arms of the device are 11 m long
A 100 kilogram crate is pushed at a constant speed up a frictionless, 30o inclined ramp. Find what constant horizontal force is required
By how much horizontal force would you need to apply to a 3.0 N plastic calculator to start it moving from rest? How much horizontal force would you need to keep it moving?
A square uniform raft, 20m by 20m , of mass 7100kg , is used as a ferryboat. determine the CM of the loaded ferryboat
Element X decays to element Y with a half-life of 0.77 s. Initially there is a sample of pure X and after 2.31 s there are 7g of Y. What was the mass of the original sample
An air parcel with mass = 150 kg is traveling at 15 meters per second due east at 38 degrees North at an altitude of 5500 meters. What is the total force exerted on the air parcel
A rifle is aimed horizontally at a target 55.0 m away. Thebullet hits the target 2.90 cmbelow the aim point. What was the bullet's flight time
In a 1.25 T magnetic field directed vertically upward, a particle having a charge of magnitude 8.50 ?C, what is the sign of the charge of this particle
A 1.80x10^2 kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.00 m above the ground. The crane that is doing the lifting produces a steady power of 4x10^2 W. How much time does it take to lift piano.
A block of mass 20m can move without friction on a horizontal table. find the magnitude of the acceleration of the descending block
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