The process in which heat flows by the mass movement of molecules from one place to another is known as
A) radiation. B) convection. C) conduction.
B
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A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applied to the string, causing the pulley to rotate and the string to unwind
If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley? A) 0.17 kg?m2 B) 17 kg?m2 C) 14 kg?m2 D) 0.20 kg?m2 E) 0.017 kg?m2
The Kelvin temperature scale is measured in degrees
a. True b. False Indicate whether the statement is true or false
Each group in a tug-of-war pulls with 1000 N on each side of the rope. The net force on the rope is
1) 0 N 2) 500 N 3) 1000 N 4) 2000 N and the tension within the rope is 5) 0 N. 6) 500 N. 7) 1000 N. 8) 2000 N.
The absolute temperature of an ideal gas is directly proportional to which of the following?
A. speed B. momentum C. kinetic energy D. mass