You roll a ball off a table and at the same time drop a second ball straight down from the edge of table. The second ball reaches the ground ____________ the first ball reaches the ground
a. before
b. at the same time that
c. after
d. before or after, depending on the masses,
e. cannot be determined
B
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Standing Sound Waves: Consider two pipes of the same length: one pipe is open at both ends and the other pipe is closed on one end but open at the other end. If the fundamental frequency of the totally open pipe is 300 Hz, what is the fundamental frequency of the other pipe?
A. 150 Hz B. 300 Hz C. 450 Hz D. 600 Hz
The ozone layer blocks much of the Sun's ________ radiation
A) gamma ray B) X-ray C) radio D) infrared E) ultraviolet
A uniform rod of length (L = 2.0 m) and mass (M = 1.5 kg) is pivoted about a horizontal frictionless pin through one end. The rod is released from rest at an angle of 30° below the horizontal. What is the angular speed of the rod when it passes through the vertical position? (The moment of inertia of the rod about the pin is 2.0 kg/m2.)
a. 3.5 rad/s b. 2.7 rad/s c. 3.1 rad/s d. 2.3 rad/s e. 1.6 rad/s
Consider positive and negative charges moving horizontally through the four regions in the figure below. Rank the currents in these four regions, from lowest to highest. (Ia is the current in Figure (a), Ib the current in Figure (b), etc.)