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An Atwood machine consists of two masses that are connected bya taut string that passes over a perfect pulley. Initially the 8pound mass is suspended 3.5 ft above the floor and the 4 pound massis resting on the floor. After the large mass is released what is the maximum distance the small mass will rise above the floor? (The string is vertical on both sides of the pulley.)
Laser light of wavelength 400 nm illuminates an array of very narrow slits, producing an interference pattern on a screen 70 cm from the slits. compute the separation between the slits
the head of a hammer m1.5 kg moving at 4.5 ms strikes a nail and bounces back with the same speed after an elastic
Consider a heat engine that operates between thermal reservoirs at 510 K and 242 K. Suppose the engine does 4900 J of work while it expels 103 J of energy to the cold reservoir. Is this engine possible in the real world? Hint: Violations of the secon..
The magnetic field B at the center of a circular coil of wire carrying a current I (as in fig. 20-9) is where N is the number of loops in the coild, determine the magnetic field strength at the center of the coil
A spherical mirror forms an image that is virtual, one-quarter of the size of the object, and 3cm from the mirror. Find the focal length of the mirror, and draw the corresponding ray diagram.
What is an average speed of the runner
An engine absorbs 1.72 kJ from a hot reservoir at 277°C and expels 1.24 kJ to a cold reservoir at 27°C in each cycle. What is the power output of the engine if each cycle lasts 0.303 s
A car travels along a road at an average speed of 40km/h andreturns along the same road at an average speed of 60km/h. Calculate the average speed for the round trip
question a small sphere with a mass of 0.002g and carrying a charge of 510-8c hangs froma thread near a very large
The box is open at the top and has edge length L = 66 cm. Find out (a) the x coordinate, (b) the y coordinate, and (c) the z coordinate of the center of mass of the box.
What must the separation be between a 6.7 kg particle and a 2.9 kg particle for their gravitational attraction to have a magnitude of 4.1 × 10-12 N
An air-track glider attached to a spring oscillates between the 11.12 cm mark and the 54.38 cm mark on the track. What is the maximum speed of the glider in cm/s
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