Velocity is similar to speed, but a ________ is also involved in velocity
a. acceleration
b. direction
c. position
d. scalar
b
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A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed is doubled. If the actual contact with the bat lasts 0.45 s,
what is the ratio of the magnitude of the average acceleration of the ball to its original speed? A) 6.7 s-1 B) 4.4 s-1 C) 2.2 s-1 D) 0.15 s-1
A mass spectrometer splits a beam of 
and
singly charged ions having the same velocity by passing the beam through a uniform magnetic field. If the radius of the path for the
ions is 12.0 cm, what will be the radius for the
ions?
A. 9.90 cm B. 10.9 cm C. 12.0 cm D. 13.2 cm E. 14.5 cm
Two life preservers have identical volumes, one filled with Styrofoam and the other filled with sand. When the two life preservers are worn by swimmers,
one swimmer floats with part of the preserver above water, and the other swimmer sinks. In this case the buoyant force is greater on the life preserver filled with A) Styrofoam. B) sand. C) same for both
The chemical properties of calcium and strontium are similar because both
a. are located on the left side the periodic table. b. are in the same group. c. have four electrons in the first shell. d. are in the same period.