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Air passes steadily through a device from 20 psia and 80°F to 40 psia. During the process a work input of 24.2 Btu/lb is required, and a heat loss of 7.0 Btu/lb occurs with the energy appearing in the atmosphere at 80°F. Determine
(a) the entropy change of the air, and
(b) the entropy change of the atmosphere, both in Btu/(lb)(°R).
(c) Is the process reversible, irreversible, or impossible?
As observed from Earth, rocket Alpha moves with speed 0.802c and rocket Bravo travels with a speed of 0.692c. What is the speed of rocket Alpha as measured from rocket Bravo
A force of 10N acts on two blocks on frictionless surface. the first block is 3kg, and the second block is 2kg. what is the acceleration of the system? what force does the 3kg block exert on the 2kg block? what force does the 2kg block exert on th..
Two sinusoidal waves of the same frequency travel in the same direction along a string. what is the amplitude (in cm) of the resultant wave
The largest diamond ever found had a size of 3106 carats. One carat is equivalent to a mass of 0.200 g. determine the weight of this diamond in pounds
Heather and Mathew walked eastward with a speed of 9.8 m/s. If it takes those 34 min. to walk to the store, how far have they walked.
When jumping, a flea reaches a takeoff speed of 1.2 m/s over a distance of 0.46mm, What is the flea's acceleration during the jump phase and How long does the acceleration phase last
Your toaster has a power cord with a resistance of 2.2×10?2 connected in series with a 9.9 nichrome heating element. How much power is dissipated in the power cord
In lab you find that a 1-kg rocksuspended above water wights 10 N. when the rock issuspended beneath the surface of the water , the scale reads8N.
A car is traveling at 15 m/s on a horizontal road. The coefficient of kinetic between the tires and road is
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
q1. there is a well-known legend about physicist isaac newton. it says that he was inspired into his improvement of the
1.76- block at rest on a ramp of height. While the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 12.0 that has a coefficient of kine..
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