On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.90 feet tall on Earth. She lands on planet Z and is measured to be 94 foosi tall. Her partner Rachael is 83 foosi tall. How tall is Rachael on Earth?
a. 5.2 feet
c. 5.8 feet
b. 5.5 feet
d. 6.3 feet
A
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A piece of plastic has a net charge of +2.00 ?C. How many more protons than electrons does this piece of plastic have? (e = 1.60 × 10-19 C)
A) 1.25 × 1013 B) 1.25 × 1019 C) 2.50 × 1013 D) 2.50 × 1019
Alphonse moves eastward in a car at 30 m/s. Velma, moving eastward in a train at 70 m/s, passes him. Alphonse's velocity relative to Velma is
A) 40 m/s westward. B) 100 m/s eastward. C) 40 m/s eastward. D) 30 m/s westward. E) 100 m/s westward.
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44.0 g/mole, is 396 m/s
What is the rms speed of water vapor molecules, with a molecular weight of 18.0 g/mol, at the same temperature as the carbon dioxide? A) 253 m/s B) 387 m/s C) 421 m/s D) 506 m/s E) 619 m/s
As a basketball player starts to jump for a rebound, he begins to move upward faster and faster until he leaves the floor. During this time that he is in contact with the floor, the force of the floor on his shoes is:
a. bigger than his weight. b. equal in magnitude and opposite in direction to his weight. c. less than his weight. d. zero.