The Sun is at the vernal equinox within one or two days of which of the following dates?
a. March 21
b. September 22
c. December 22
d. June 21
a
Physics & Space Science
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The fuel most likely to power tomorrow's scooters, forklifts, and busses is
A) hydrogen. B) helium. C) lithium.
Physics & Space Science
Atomic Nucleus: In a 
Nb nucleus, how many protons, neutrons, and electrons are found there?
A. 41, 52, 93 B. 41, 52, 41 C. 52, 41, 41 D. 41, 52, 0 E. 93, 41, 93
Physics & Space Science
The lowest A on a piano has a frequency of 27.5 Hz. If the tension in the 2.00-m string is 308 N, and one-half wavelength occupies the string, what is the mass of the wire?
a. 0.025 kg b. 0.049 kg c. 0.051 kg d. 0.081 kg e. 0.037 kg
Physics & Space Science
When charging a capacitor with a battery, how would the internal resistance of the battery affect the charging of the capacitor?
What will be an ideal response?
Physics & Space Science