Place the following items in order of actual physical size, from smallest to largest
A) planets and stars are about the same size, solar system, galaxy
B) star, planet, solar system, galaxy
C) star, planet, galaxy, solar system
D) planet, star, galaxy, solar system
E) planet, star, solar system, galaxy
E
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Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will get to the bottom
A. at the same time as the Volkswagen. B. after the Volkswagen. C. before the Volkswagen.
A 140-g block of copper is taken from a kiln and quickly placed into a beaker of negligible heat capacity containing 290 g of water. The water temperature rises from 6.8°C to 26.8°C. Given cCu = 0.10 cal/g/°C, and cwater = 1.00 cal/g/°C, what was the temperature of the kiln?
a. 720°C b. 387°C c. 682°C d. 441°C e. 68.2°C
How do the energy level spacings for a particle in a box change when the box is made longer?
A. The spacings do not change. B. The spacings increase. C. The spacings decrease. D. There is insufficient information to answer this question.
Projectile Motion: A boy kicks a football with an initial velocity of 20 m/s at an angle of 25° above the horizontal. If we neglect air resistance, the magnitude of the acceleration of the ball while it is in flight is
A. 25 m/s2. B. 18 m/s2. C. 9.8 m/s2. D. 8.5 m/s2. E. 0 m/s2.