A race car circles 10 times around an 8-km track in 20 min. What is its average velocity per lap?
What will be an ideal response?
Average lap velocity is 0.
Physics & Space Science
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If the speed of light through an unknown liquid is measured at 1.67 × 10^8 m/s, what is the index of refraction of this liquid? (c = 3.00 × 10^8 m/s)
a. 1.80 c. 0.600 b. 1.67 d. 1.20
Physics & Space Science
Comet nuclei can be darker than charcoal
Indicate whether the statement is true or false
Physics & Space Science
What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 × 106 m around the Earth? (Mass of Earth = 6.0 × 1024 kg.)
A. 5.0 × 109 J B. 1.0 × 1010 J C. 1.5 × 1010 J D. 2.0 × 1010 J E. 2.5 × 109 J
Physics & Space Science
Just after a big fish swallows a small fish, the momentum of the two-fish system is
A) greater after lunch than before. B) the same before and after lunch. C) somewhat less after lunch.
Physics & Space Science