Which two optical objects have a positive focal length based on the sign convention in the book.
A. Diverging lens and converging mirror
B. Diverging lens and diverging mirror
C. Converging lens and diverging mirror
D. Converging lens and converging mirror
Ans: D. Converging lens and converging mirror
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General Questions: In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV.
A. True B. False C. It depends on whether the collision is a head-on collision or a rear-end collision.
Addition by 1. Components: The figure shows three vectors, src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q35g6.jpg" style="vertical-align: -5.0px;" />.
, 
, and 
, along with their magnitudes. Determine the magnitude and direction of the vector given by 
- 
- 
What will be an ideal response?
A bullet fired horizontally from a rifle begins to fall
A) as soon as it leaves the barrel. B) after air friction reduces its speed. C) neither of these
He was the first to prove that comets lie beyond Earth's atmosphere
A) Tycho Brahe B) Copernicus C) Kepler D) Galileo E) Aristotle