As a radio source, the period of "pulsar Earth" is:
A) 30 minutes.
B) 23 hours, 56 minutes.
C) 24 hours.
D) 29.5 days.
E) 365.25 days.
B
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Which of the following indicates the presence of high-mass stars in a region of recent star formation?
A) closely spaced low-mass stars B) ionization nebulae C) globular clusters D) planetary nebulae
The entropy of the surroundings remains constant during an adiabatic change even if the change is irreversible
Indicate whether the statement is true or false
The peak current and voltage outputs of a generator are 20 A and 240 V, respectively. What average power is provided by the generator?
What will be an ideal response?
Fred carried a 100 N basket to his apartment the fifteenth floor of his building by climbing the stairs
June used a pulley hung from a fifteenth floor window that amplified her force by a factor of 3 to raise a different 100 N basket up to the apartment. Fred claims he'd done more work. June disagreed and says she'd put out more power. Is either person correct? Explain.