When we consider the distance a pendulum swings to and fro we're talking about the pendulum's
A) frequency.
B) period.
C) wavelength.
D) amplitude.
Answer: D
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You find a mysterious rock on the ground and determine that 60% of its uranium-235 has been converted into lead-207. What is the most likely origin of the rock, based on its radiometric age?
A) It's older than our solar system, so it must have come from another solar system. B) It's a meteorite dating back to the formation of the solar system. C) It's a volcanic rock nearly a billion years old. D) It was just formed this year during the eruption of a nearby volcano.
You are asked to select a material for a barge tow line that must be as strong as steel cable, but can float on water and is not corroded by salt water. What material discussed in this chapter might be suitable?
What will be an ideal response?
The Declaration of Principles Concerning Activities Following the Detection of Extraterrestrial Intelligence states that the first thing to do after the detection of a possible signal is to
A) send a reply B) announce the discovery to the public C) confirm that it is genuine D) classify it top secret
Suppose we throw a baseball with an initial speed of 12 m/s in a direction 60° upward from the horizontal. What is the baseball’s speed at the peak of its trajectory?
A. 12 m/s B. 10.4 m/s C. 6 m/s D. 3 m/s E. 0 m/s F. Other (specify)