What is the zone of avoidance?
A. a part of the sky in which astronomers cannot observe due to bright emission from interstellar dust
B. a quadrant of the Galaxy where no galaxies exist
C. a part of the region of the Solar System where it is too dangerous to send spacecraft
D. the region of the sky where no galaxies are seen due to obscuring dust in the Milky Way
Answer: D
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What does the law of conservation of momentum tell us about collisions?
a. Collisions increase the momenta of the colliding objects because the impacts add momentum. b. Collisions decrease the momenta of the colliding objects because the friction of the impact decreases momentum. c. The total momentum in the system does not change because of a collision. d. The total momentum in the system goes to zero at the time of the collision. e. The momentum of each colliding object goes to zero upon collision.
Kepler found the orbits of planets are ellipses, not circles
Indicate whether the statement is true or false
Two cars are traveling around identical circular racetracks. Car A travels at a constant speed of 20 m/s. Car B starts at rest and speeds up with constant tangential acceleration until its speed is 40 m/s. When car B has the same (tangential) velocity as car A, it is always true that:
a. it is passing car A. b. it has the same linear (tangential) acceleration as car A. c. it has the same centripetal acceleration as car A. d. it has the same total acceleration as car A. e. it has traveled farther than car A since starting.
A 40.0 liter gas tank is filled to the brim with gasoline when the temperature is 5.00
Gasoline has a coefficient of volume expansion of 
If the gas tank is moved into the sun of a hot summer day, the temperature of the gas tank is increased to 60.0 
What is the volume of gasoline that overflows the tank (ignore the expansion of the gas tank)?
A. 3.95 liters B. 3.11 liters C. 2.67 liters D. 2.09 liters E. 1.55 liters