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If you triple the distance between two charged objects, by what factor is the electric force affected?
a devive consists of four balls. just after the impact, what is the angular speed of the device
A rock is thrown vertically upward with a speed of 15.0m/s from the roof of a building that is 40.0m above the ground, What is the speed of the rock just before it strikes the ground
To save on heating cost, the owner of a greenhouse keeps 660kg of water around in barrels. find the minimum ampere rating of an electric heating system
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
One trajectory that can be used to send spacecraft from Earth to Mars is an elliptical orbit that has Sun at one focus, its perihelion at Earth, Find the semimajor axis of the ellipse
Use the Rydberg equation to calculate the wavelength in nm of the light emitted, What is the color of the light emitted
Two capacitors are connected in a parallel combination. C1=6.0 x 10^-6 farad and C2= 3.0 x 10^-6 farad.the voltage applied to the combination is 120 volts. determine the charge that is stored on capacitor C2.
A parallel-plate capacitor is formed from two 3.60cm × 3.60cm electrodes spaced 2.70mm apart, What is the charge (in nC) on each electrode
If a 2.4 m wave was created using a frequency of 63 Hz, what frequency would be required to creat the next higher harmonic
For a string stretched between two supports, two successive standing-wave frequencies are 505Hz and 630Hz . There are other standing-wave frequencies lower than 505Hz and higher than 630Hz.
A 1200 kg boat is traveling at 80 km/h when its engine is shut off. The magnitude of the frictional force fk between boat, Find the time required for the boat to slow down to 40 km/h
A model rocket is fired vertically from rest. It has a net acceleration of 17.0 m/s2. estimate how high does the rocket travel
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