A 0.10-kg object moving initially with a velocity of +0.20 m/s makes an elastic head-on collision with a 0.15-kg object initially at rest. What percentage of the original kinetic energy is gained by the 0.15-kg object?
a. 4%
c. 50%
b. -4%
d. 96%
D
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Recent high resolution radio observations show that quasars can be classified as
a. exploding supernova stars. b. exploding planets. c. normal galaxies like our Milky Way Galaxy. d. a kind of active galaxy similar to Seyfert and radio galaxies.
Significant Figures: In a parallel universe, the quantity ? has the value 3.14049… . Express ? in that universe to(a) four significant figures(b) five significant figures.
Fill in the blank(s) with the appropriate word(s).
A 3.0-kg block slides on a frictionless 20° inclined plane. A force of 16 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?
A. 2.0 m/s2 down the incline B. 5.3 m/s2 up the incline C. 2.0 m/s2 up the incline D. 3.9 m/s2 down the incline E. 3.9 m/s2 up the incline
Which of the following thought of the idea that the intensity of a matter wave represents the probability that an interaction will occur?
A) Born B) Schroedinger C) Planck D) de Broglie E) Einstein