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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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).
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
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.
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