What type of stars does the bar contain?
A.) Old, cool stars that glow redder.
B.) Young, cool stars that glow bluer.
C.) Old, hot stars that glow bluer.
D.) Old, cool stars that glow bluer.
E.) The bar isn't made of stars, just gas.
Answer: A.) Old, cool stars that glow redder.
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A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 rad/sec2 acquires an angular velocity of 5.00 rad/sec. The CD continues rotating at 5.00 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the angular distance traveled by a point 4.00 cm from the center, at the time 10.0 seconds from the start?
A. 27.6 rad B. 37.5 rad C. 40.7 rad D. 48.2 rad E. 51.2 rad
Gale Crater is the site of exploration for which Mars rover?
A) Spirit B) Opportunity C) Curiosity D) Sojourner
The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon
Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the period of revolution of Phobos to that of Deimos? A) 0.2528 B) 0.3998 C) 1.582 D) 2.858 E) 3.956
If you shout across a canyon and the echo returns in four seconds, how far away is the other side? (Velocity of sound in air is 300 m/s)
a. 150 b. 300 c. 600 d. 1200 e. 2400 meters