Suppose an asteroid has a semi-major axis of 4 AU. How long does it take the asteroid to go around the Sun?
1.2 years
2.4 years
3.6 years
4.8 years
4
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Ideal Gas Law: A 24.0-L tank contains ideal helium gas at 27°C and a pressure of 22.0 atm. How many moles of gas are in the tank? (R = 8.31 J/mol ? K, 1 atm = 101 kPa)
A. 238 mol B. 138 mol C. 17.5 mol D. 21.4 mol E. 76.0 mol
If a star has a parallax of 0.02 seconds of arc, then its distance is
a. 20 pc b. 50 pc c. 2 pc d. 5 pc e. 500 pc
The force of kinetic friction between two surfaces is dependent on the relative speed of the two surfaces
Indicate whether the statement is true or false
Coulomb's Law: Four point charges of equal magnitudes but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure. Which one of the arrows shown represents the net force acting on the center charge?
A. A B. B C. C D. D