Meteors in outer space keep moving, rather than slowing down and stopping. This behavior is predicted by
A) Galileo's law of falling.
B) the law of force pairs.
C) Aristotle's principle of natural motion.
D) the law of inertia.
E) Newton's law of motion.
D
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On average, elliptical galaxies are much older than large spiral galaxies
Indicate whether the statement is true or false
The half-life of a muon is 2.20 ?s as measured in a stationary reference frame. What is the half life of the muon (in ?s) when it is moving with a speed of v = 0.800c?
A. 8.13 B. 2.75 C. 3.67 D. 15.8 E. 1.32
A hydraulic press multiplies a force by 100, which is compensated by
A) energy, which is divided by 100. B) the lesser distance through which the force acts. C) the time through which the force acts. D) the mechanism providing the force. E) none of the above
Thermal Expansion: A quantity of mercury occupies 400.0 cm3 at 0°C. What volume will it occupy when heated to 50°C? Mercury has a volume expansion coefficient of 180 × 10-6 K-1.
A. 450 cm3 B. 409.7 cm3 C. 403.6 cm3 D. 401.8 cm3