A package of supplies is dropped from a plane, and one second later a second package is dropped. Neglecting air resistance, the relative velocity of the 1st package viewed from the second will
A) depend upon their weight.
B) be constant.
C) increase.
D) decrease.
E) be zero.
C
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A 60.0 cm long brass rod is suspended at the ends by long strings. The rod is struck at one end parallel to the rod and causes the rod to vibrate longitudinally with the ends free. 
The frequency of the vibration is
A. 3,790 Hz. B. 3,540 Hz. C. 3,120 Hz. D. 2,720 Hz. E. 2,140 Hz.
The planet in our solar system with the highest average surface temperature is
A) Venus. B) Mercury. C) Earth. D) Neptune.
Your lungs hold 4.2 L of air at a pressure of 101.3 kPa. If you are holding your breath and dive into a pool to a depth of 5.0 m below the surface of the water,
what is the volume of the air in your lungs assuming that the temperature remains the same? A) 2.8 L B) 2.9 L C) 3.2 L D) 3.3 L E) 3.5 L
A uniform meter stick is pivoted to rotate about a horizontal axis through the 25-cm mark on the stick. The stick is released from rest in a horizontal position. The rotational inertia of a uniform rod about an axis perpendicular to the rod and through the center of mass of the rod is given by (1/12)ML2 . Determine the magnitude of the initial angular acceleration of the stick
a. 17 rad/s2 b. 13 rad/s2 c. 15 rad/s2 d. 19 rad/s2 e. 23 rad/s2