If the Moon were four times as massive but twice as far from Earth, high tides on Earth would be
A) higher.
B) lower.
C) no different.
Answer: B
Physics & Space Science
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Spectral Series: The value of a wavelength in the Balmer series is 372.1 nm. What is the corresponding value of n?
A. 6 B. 3 C. 9 D. 10 E. 14
Physics & Space Science
Faraday's Law: According to Faraday's law, a coil in a strong magnetic field must have a greater induced emf in it than a coil in a weak magnetic field.
A. True B. False
Physics & Space Science
The thermal efficiency e of a heat engine is defined as follows: e=W/Qh. Express the efficiency in terms of Qh and Qc.
Physics & Space Science
We find most stars still on the main sequence because this stage takes ________
Fill in the blank(s) with correct word
Physics & Space Science