The average velocity of gas molecules in a tank in thermal equilibrium is
1.greater than zero.
2.less than zero.
3.equal to zero.
4.impossible to determine.
3
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A 600-kg car is going around a banked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction?
A) 29.1° B) 13.5° C) 33.8° D) 56.2° E) 60.9°
A nucleus of radium-223 undergoes alpha decay. (a) Write the reaction equation and (b) determine the identity of the daughter nucleus
Consider a wire at rest in a magnetic field as shown in the following figure. What will happen to the wire?
a.
A current will flow in the wire.
b.
The wire will be pushed perpendicular to the plane of the magnetic field.
c.
The wire will be pushed toward the north pole.
d.
Nothing will happen.
Twenty kilometers is
a. 200,000 m b. 20,000 m c. 2,000 m d. 200 m e. 0.02 m