One gram of water is heated from 0°C to 100°C at a constant pressure of 1 atm. Determine the approximate change in internal energy (in cal) of the water
a. 160
b. 130
c. 100
d. 180
e. 50
c
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A theory is a hypothesis that has been shown to be correct by many experiments.
a. true b. false
A jet plane flying 600 m/s experiences an acceleration of 4.0 g when pulling out of a circular dive. What is the radius of curvature of the circular part of the path in which the plane is flying?
A) 9200 m B) 640 m C) 7100 m D) 1200 m
A 7.00-kg mass is placed on a 28.0° incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.574, and the coefficient of sliding friction is 0.528 . What is the frictional force in this situation?
a. 32.2 N b. 60.6 N c. 32.0 N d. 34.8 N e. 3.29 N
A camera is designed to bring light into focus (to form an image) on its
A) detector. B) shutter. C) lens.