How much upward force does each support exert on the beam
A 3.0 m long rigid beam with a mass of 120 kg is supported at each end. An 85 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
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A wad of wet putty of mass 0.020 kg drops vertically onto the record from above and sticks to the edge of the record. What is the angular speed of the record immediately after the putty sticks to it.
A refrigerator has a coefficient of performance of 4. If the refrigerator absorbs 30 cal of heat from the cold reservoir in each cycle, what is the heat expelled (in cal) into the heat reservoir ?
How different are migration patterns for post 2nd world war period compared to before the war? Discuss.
A dipole with dipole moment 1.6 is oriented at 31 to a 5.0 electric field. What is the magnitude of the torque on the dipole?
An automobile tire is pumped up to a gauge pressure of 2.0 × 105 Pa when the temperature is 27°C. What is its gauge pressure after the car has been running on a hot day so that the tire temperature is 77°C?
A space station, in the form of a wheel 125 m in diameter, rotates to provide an "artificial gravity" of 3.10 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) t
Ethylene glycol, the main component of automotive engine coolant, has a specific heat of 2.35 J/g.oC. Calculate the amount of heat required to raise the temperature of 1.00 kg of ethylene glycol from 20.0 oC to 80.0 oC.
Find the length of a bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on a park bench, given that its proper length is 1.90 m.
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