Alex throws a 0.43-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s, and just after is 5.5 m/s. What is the magnitude of the change in the ball's momentum?
a. 0.09 kgm/s
c. 4.3 kgm/s
b. 1.0 kgm/s
d. 5.2 kgm/s
D
Physics & Space Science
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Fig. 15-5 shows four Gaussian surfaces surrounding a distribution of charges. Which Gaussian surfaces have an electric flux of +q/?o through them?
(1) a.
(2) b.
(3) b and d.
(4) c.
(5) b and c.
Physics & Space Science
Which of the following has the longest wavelength?
a) Visible light b) Gamma Ray c) Ultraviolet d) Radiowaves
Physics & Space Science
What chemical compound is responsible for Uranus and Neptune's color?
A. water B. methane C. complex organic compounds of sulfur and phosphorus D. ammonia
Physics & Space Science
At what local solar time will the new phase of the
Moon be on the overhead meridian? a) 6 a.m. b) 6 p.m. c) 12 noon. d) 12 midnight. •
Physics & Space Science