What is the maximum efficiency of an engine operating between 500 K and 300 K?
A) 20%
B) 30%
C) 40%
D) 50%
E) 60%
C
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Which is a characteristic of Jovian planets when compared to Terrestrial planets?
a. Jovian planets are much larger than Terrestrial planets b. Jovian planets have rocky surfaces c. Jovian planets have no differentiation like Terrestrial planets d. Jovian planets have moons, unlike the Terrestrial planets e. Jovian planets have warmer atmospheres than Terrestrial planets.
Why can a rather small meteorite make such a big crater when it hits?
A. It is traveling so fast that it has a very large kinetic energy even with small mass. B. It is so hot from its passage through the air that it melts the surroundings. C. Air pressure on the leading side of the meteorite forms a shock wave that blows out the crater. D. Meteorites are much harder than the surface of the planet, and punch through it easily.
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
A 500?g block traveling at 60 cm/s slides onto a 1?kg cart as shown. The block stops sliding before reaching the end of the cart
The final speed of the cart is closest to: