Two friends are standing on opposite ends of a canoe that is initially at rest with respect to a frictionless lake. The person in the front throws a very massive ball toward the back, and the person in the back catches it

After the ball is caught, the canoe is
A) stationary. B) moving backward. C) moving forward.


A

Physics & Space Science

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A 90.0 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater. The volume of the seawater displaced by the scuba diver with tanks and equipment is

A. 0.0508
B. 0.0575
C. 0.0667
D. 0.0708
E. 0.0878

Physics & Space Science

The remains of type II supernovae (massive star, core collapse supernovae) are seen in the sky as

A) nebulae that are shrinking as the central mass pulls them in. B) nebulae that are expanding at thousands of kilometers per hour. C) nebulae that are stellar nurseries. D) white dwarfs. E) white holes.

Physics & Space Science

Magnification by a lens would be greater if light

A) propagated instantaneously. B) traveled faster in glass than it does. C) traveled slower in glass than it does. D) beams spread less. E) none of the above

Physics & Space Science

The Cenozoic era began about how many million years ago?

a. 65 b. 545 c. 3 d. 245

Physics & Space Science