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The crankshaft of a single-cylinder air compressor rotates 1800 rpm. The piston area is 2000 mm2, and the piston stroke is 50 mm. Assume a simple "idealized" case where the average gas pressure acting on the piston during the compression stroke is 1 MPa, and pressure during the intake stroke is negligible. The compressor is 80% efficient. A flywheel provides adequate control of speed fluctuation.
(a) What motor power (kW) is required to drive the crankshaft?
(b) What torque is transmitted through the crankshaft?
For a contact (meniscus) lens, the inner surface is curved to fit the eye with radius 7.8 mm. The lens with n=1.56 needs to have a focal length of 44.4 cm. What should be the curvature radius of the outer surface?
A glass tumbler of 200 g mass and 5 cm inside diameter is full to a depth of 10 cm with tap water whose temperature is 10 degrees C, and at 50 g of ice 0 degrees C are then added. At the end of an hour, it is noticed that the ice has just finished me..
A 12.5 gram bullet is fired into a board. The board is subjected to a force of 3.50x104 Newtons when it hits the board. If the bullet travels 3.50 cm before coming to a stop, what was the initial speed of the bullet
a long straight metal wire of radius r1 3.10e-2 m is surrounded by a metalic cylindrical shell of inner radius r2
In this problem, the question tells us that there are two springs connected to each other, and that the spring constant of each of them is 6430 N/m. Can someone explain why the total effective spring constant of the 2 springs is k/2 and not just 6430..
Wildlife biologists fire 20-g rubber bullets to stop a rhinoceros charging at 0.81m/s. What impulse does each bullet deliver
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 60.3° and 47.5°, respectively. Obtain the speed of light in the material
The ceramic coffee cup in the figure below, with m = 135 g and c = 1090 J/(kg · K), is initially at room temperature (24.0° C). If 275 g of 80.3 C coffee and 12.2 g of 5.00° C cream are added to the cup, what is the equilibrium temperature of the sys..
A child is riding a merry-go-round which completes one revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleration of the child?
Blocks A (mass 6.50kg ) and B (mass 15.00kg ) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 10.0m/s . The blocks are equipped with ideal spring bumpers.
Find the smallest radius of an unbanked track around which a bicyclist can travel if her speed is 31 km/hand the μs between tires and track is 0.31
A car is traveling north at 20.0 m/s. After 10 s its velocity is 14.0 m/s in the same direction. Find the magnitude and direction of the car's average acceleration
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