The ecliptic can be defined as
a. the plane that is perpendicular to the Earth's axis of rotation.
b. the projection of the Earth's equator onto the sky.
c. the path traced out by the Moon in our sky in one month against the background stars.
d. the path traced out by the Sun in our sky over one year against the background stars.
D
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According to kinetic theory, the temperature of a gas is determined by the average kinetic energy of its molecules. What would happen if the gas were in a container that was moving with a high velocity?
What will be an ideal response?
If the frequency of a violin string is to be increased by 20%, what change in tension must be applied?
A) 44% B) 20% C) 4.5% D) 10%
The average braking force of a 1000-kg car moving at 10 m/s braking to a stop in 5 s is
A) 1000 N. B) 2000 N. C) 3000 N. D) 4000 N. E) 5000 N.
An object heated to twice the absolute temperature emits radiation
A) with twice the peak frequency. B) in the ultraviolet part of the spectrum. C) in the radio wave part of the spectrum. D) with longer wavelengths.