An inverted empty jar is pushed downward into water so that trapped air inside can't escape. As it is pushed deeper, the buoyant force on the jar
A) increases.
B) decreases.
C) remains the same.
Answer: B
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A _________ is an electrochemical cell that consumes a fuel and directly produces electrical energy.
Fill in the blank(s) with the appropriate word(s).
Voyager 2 should reach the nearest stars (besides the Sun) in about 500 years
Indicate whether the statement is true or false
According to the Rutherford model of the atom, most of the volume of an atom
a. is empty space. b. was occupied by the nucleus. c. contained positive charges. d. excluded electrons.
A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal, and it lands on the green. Another golfer hits a ball with the same speed but at another angle, and it lands on the green by the other ball. What was the launch angle for the second golfer?
a. 30° b. 20° c. 45° d. 40° e. 10°