A sonic boom occurs only as an airplane just reaches the speed of sound in air, but not after it increases its speed further
A) True B) False
B
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Angular Momentum: A uniform ball with diameter of 10 cm rolls without slipping on a horizontal tabletop. The moment of inertia of the ball about an axis through its center is 2.2 × 10-3 kg ? m2, and the translational speed of its center is 0.45 m/s.(a) What is its angular speed of the ball about its center of mass?(b) What is the rotational kinetic energy of the ball?(c) What is the ball's angular momentum about its center of mass?
What will be an ideal response?
The resistance of the light bulb in ohms is
a. 0.05 c. 720 b. 20 d. none of the above
An object has kinetic energy of 324 J. If its speed is 9 m/s, what is its mass?
a. 8 b. 36 c. 1620 d. 324
The average molecular translational kinetic energy of a molecule in an ideal gas is
A.
kBT.B.
RT.C.
kBT.D.
RT.E.
kBT, where n = number of internal degrees of freedom.