Which planet(s) have an atmosphere that consists mostly of carbon dioxide?
A) Venus, Earth, and Mars
B) Venus and Mars
C) Venus only
D) Mars only
B
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A fountain sends water to a height of 100 meters. What must be the pressurization (above atmospheric) of the water system? 1 atm= 1.01 × 105 N/m2.
A. 1.0 atm B. 4.2 atm C. 7.2 atm D. 9.7 atm E. 8.2 atm
A good conductor of electricity is generally a good conductor of heat. True or False? ________
Fill in the blank(s) with the appropriate word(s).
A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2 . For the next 20 s, the acceleration of the particle is ?1.0 cm/s2 . What is the position of the particle at the end of this motion?
a. zero b. +3.0 m c. ?1.0 m d. +2.0 m e. ?3.0 m
A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?