A planet is much brighter than the star it orbits
a. True
b. False
Indicate whether the statement is true or false
False
RATIONALE:
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What is the maximum efficiency of a heat engine operating between 293 Kelvins and 273 Kelvins, the temperatures at the surface and several hundred meters below the surface, respectively, of the ocean?
A miniature, spring-loaded, radio-controlled gun is mounted on an air puck. The gun's bullet has a mass of 6.00 g, and the gun and puck have a combined mass of 130 g. With the system initially at rest, the radio-controlled trigger releases the bullet, causing the puck and empty gun to move with a speed of 0.500 m/s. Of the total kinetic energy of the gun-puck-bullet system, what percentage is in
the bullet? a. 4% b. 98% c. 96% d. 23% e. 100%
Which of the following must a cell be able to do to produce viable offspring?
A) Make copies of its deoxyribonucleic acid B) Divide rapidly and uncontrollably C) Grow very large in size D) Produce antibiotics
The rotation periods of Venus, Jupiter, Saturn, Uranus and Neptune are difficult to determine because:
A) they rotate so fast. B) they are all gas giants. C) they are so far away from the Sun. D) their surface features are obscured by their atmospheres. E) each one has a large satellite that interferes with this measurement.