An automobile engine takes in 4000 J of heat and performs 1100 J of mechanical work in each cycle. (a) Calculate the engine's efficiency. (b) How much heat is "wasted" in each cycle?
What will be an ideal response?
(a) 27.5% (b) 2900 J
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What three classes of stars are most likely to house life like ours? Why?
What will be an ideal response?
Imagine we have a planet identical to Jupiter around another star, with the exception that its orbit is much closer. How would its density compare to Jupiter?
A) it would be slightly higher B) it would be much higher C) it would be lower D) it would be the same
Saturn's rings may have been formed when a small moon or icy planetesimal came within Saturn's _______________ and tides pulled it apart
Fill in the blank(s) with correct word
A projectile is launched from ground level at 15° above the horizontal and lands downrange. What other projection angle for the same speed would produce the same down-range distance?
A) 30° B) 45° C) 50° D) 75° E) 90°