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Two people carry a heavy electric motor by placing it on a light board 2.30m long. One person lifts at one end with a force of 420N , and the other lifts the opposite end with a force of 650N .
Suppose the board is not light but weighs 180N , with its center of gravity at its center, and the two people each exert the same forces as before. What is the weight of the motor in this case?
Where is its center of gravity located?
A 10.4 m long steel beam is accidentally dropped by a construction crane from a height of 8.67 m. What is the induced EMF in the beam just before impact with the Earth
Calcualte the radiation dosage (in rads) for a 67-kg person that is exposed to 6.0 seconds to a 3.0 Ci source of beta radiation.
Determine the maximum charge per area that can be stored on a parallel plate capacitor if the region between the plates is filled with silicon oil
A virtual image is formed 22.0 cm from a concave mirror having a radius of curvature of 30.5 cm. compute the position of the object
Establish the wave functions and the general expression
We wish to coat a piece of glass (n=1.5) with a thin film (n=1.42) so that a maximum amount of light will be transmitted, what is the minimum thickness of the film in millimeters
An x-ray photon of 0.13 nm strikes a metal and undergoes Compton scattering of the electrons in the metal. What is the momentum of the incident photon
A student is running at her top speed of 5.2m/s to catch a bus, which is stopped at the bus stop. For what time does she have to run in that case
Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountaintop?
What is the force of air resistance. how high was the jump.
Light of wavelength 550. nm in air is found to travel at 1.96x10^8 m/s in a certain liquid. Determine the frequency of the light in air
A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm, what is the density of the proton
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