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A man with a mass of 80 kg sits on a chair of mass 10 kg.
A) Find the weights of the man and the chair.
B) The chair exerts an upward force of 700 N on the man. What force does the floor exert on his feet?
C) What force does the chair exert on the chair?
A Carnot heat engine is to be designed with an efficiency of 81%. what is the temperature of the "hot" reservoir
Illustrate what management's role in addressing these challenges. Illustrate what type of information technology would increase production?
a solid sphere of uniform density starts from rest and rolls without slipping a distance of d 4 m down a q 28deg
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -16.30 eV. What is the energy of the first photon emitted
A human hair is placed directly in front of the opening of a laser pointer. The light has a wavelength of 647.8 nm. Determine the approximate thickness of the hair
It has been said that George Washington, in his youth, threw a silver dollar across a river. Assuming that the river was 300 meters wide, How long was the coin in flight
two equally charged particles are held 3.1 x 10-3 m apart and then released from rest. the initial acceleration of the
When its coil rotates at a frequency of 258 Hz, a certain generator has a peak emf of 72 V. What is the peak emf of the generator
A 89.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.53 rad/s. Find the angular velocity of the platform with its load
Suppose you pour 19 g of water into 1.0 litres jar and seal it tightly. What will be the pressure of the vaporized water
An accelerator produces a beam of protons with a circular cross section that is 2.0 mm in diameter and has a current of1.1 mA. What is the number density of the protons in the beam
When laser light of wavelength 633.3nm passes through a diffraction grating. thef irst bright spots occur at +- 18.4 degree from the central maximum, At what angle do the second bright spots occur
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