The temperature of a quantity of ideal gas in a sealed container is increased from 0°C to 819°C. What happens to the speed of the molecules with average kinetic energy of the gas as a result of this temperature increase?
a. It does not change since this speed is independent of temperature.
b. It increases but it is less than double the original speed. c. It doubles.
d. It quadruples.
C
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The lengthening of the wavelength of a photon as it escapes from a gravitational field is known as__________
A) gravitational blueshift B) gravitational redshift C) photonic adaptation D) photon occultation
To find the age of a cluster, astronomers must know:
A) the distance to the cluster. B) the number of stars in the cluster. C) the iron content of all the stars in the cluster. D) the orbital motion of all the stars in the cluster.
Which of the following is the most precise method for measuring the mass of a galaxy?
A) The parallax method B) The rotation curve method C) The visual field test D) Colorimetry
As a result of the ejection of planetesimals into the Oort Cloud, simulations indicate that Uranus and Neptune moved:
A) closer to the Sun. B) further from the Sun. C) along their orbits at a different rate. D) from the inner solar system to the outer solar system. E) from the outer solar system to the inner solar system.