48 grams of oxygen at room temperature consists of how many moles?
a. 3.0
b. 1.5
c. 0.75
d. more than 3.0
e. less than 0.75
B
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Compared to the terrestrial planets, Jovian planets
a. have a higher density. b. have a smaller number of moons. c. have a much larger diameters. d. are much hotter.
Velocity Addition: A spaceship is moving away from an asteroid with a speed of 0.80c relative to the asteroid. The spaceship then fires a missile with a speed of 0.50c relative to the spaceship. What is the speed of the missile measured by astronauts on the asteroid if the missile is fired toward the asteroid?
A. 0.30c B. 0.50c C. 0.93c D. 1.3c E. 0.65c
A square loop of wire has a current going around it. The magnetic field from the current on each side of the loop results in a magnetic force on the wire on the opposite side. Each resulting magnetic force on the opposite side wire
a. pushes inward on the loop. b. is actually zero since a current cannot push on itself. c. depends on whether the current is clockwise of counterclockwise. d. pushes outward on the loop.
An element that is malleable, ductile, and a good conductor of heat and electricity would be classified as a
a. metalloid. b. semimetal. c. metal. d. nonmetal.