If a star rises about 9 PM tonight, and with the sidereal day being four minutes less than the solar one, then in a month it will rise about 7 PM
Indicate whether the statement is true or false
TRUE
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Why do astronomers think Earth ended up with so little CO2 compared with Mars and Venus?
A. Volcanoes on Earth outgassed less CO2 than on Venus and Mars. B. Pollution on Earth has reduced the amount of CO2 originally present. C. Plant life and abundant water have removed most of the CO2, locking it into rocks and the oceans. D. Comets striking the surfaces of Venus and Mars added CO2 to their atmospheres, but not to Earth.
All planets orbit the Sun in the same direction (counterclockwise as viewed from above Earth's North Pole)
Indicate whether the statement is true or false
The turntable of a record player has an angular velocity of 8.0 rad/s when it is turned off. The turntable comes to rest 2.5 s after being turned off. Through how many radians does the turntable rotate after being turned off? Assume constant angular acceleration
a. 12 rad b. 8.0 rad c. 10 rad d. 16 rad e. 6.8 rad
A cubic box with sides of 20.0 cm contains 2.00 × 1023 molecules of helium with a root-mean-square speed (thermal speed) of 200 m/s
The mass of a helium molecule is 3.40 × 10-27 kg. What is the average pressure exerted by the molecules on the walls of the container? The Boltzmann constant is 1.38 × 10-23 J/K and the ideal gas constant is R = 8.314 J/mol ? K = 0.0821 L ? atm/mol ? K. A) 3.39 kPa B) 1.13 kPa C) 570 Pa D) 2.26 kPa E) 9.10 Pa