A spinning tossed baseball veers off course in the direction of
A) crowded streamlines.
B) non-crowded streamlines.
C) onward-coming streamlines.
Answer: A
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The cratered surfaces of Saturn's moons may look like our moons, but in reality they are made chiefly of ________
Fill in the blank(s) with correct word
Assume that an ohmic light bulb’s brightness is directly proportional to the power it dissipates. If we replace the battery in our simple circuit with one with twice the characteristic potential difference, the bulb’s brightness
A. remains the same. B. increases by a factor of 2. C. increases by a factor of 4.
The 21 cm line of hydrogen is strongly absorbed by interstellar dust
Indicate whether the statement is true or false
What makes the Crab pulsar somewhat unusual among pulsars in general?
A) It is the most intense source of X-rays in the sky. B) It is the fastest pulsar known. C) It is the oldest pulsar observed. D) Its period is not regular like other pulsars. E) It is rather bright at visible wavelengths.