_____ is the nearest star to the Sun
A) Polaris
B) Proxima Centauri
C) Sirius
D) Alpha Centauri
B
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The fundamental nuclear reaction occurring in the core of the Sun is ________
A) nuclear fusion of helium into carbon B) nuclear fusion of hydrogen into helium C) radioactive decay D) nuclear fission
The conservation of energy applies to satellites in
A) circular orbit. B) elliptical orbit. C) both of these D) neither of these
A car is making a 12-mile trip. It travels the first 6.0 miles at 30 miles per hour and the last 6.0 miles at 60 miles per hour. What is the car's average speed for the entire trip?
A) 20 mph B) 35 mph C) 40 mph D) 45 mph E) 50 mph
Energy and Mass: According to the equation E = mc2, an object turns into energy when it reaches the speed of light.
A. True B. False