Because meteorites travel faster than the speed of sound, we cannot hear them until they are relatively close
a. True
b. False
ANSWER: True
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A ball is projected into the air with 100 J of kinetic energy that is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is
A) less than 100 J. B) more than 100 J. C) 100 J. D) not enough information given
Whales evolved from land-dwelling ancestors. Indicate whether the statement is true or false
All of the following statements about particulates are true, except
A) they can be solid. B) they can be liquid. C) they can have natural sources. D) they are larger than aerosols.
What is a parliamentary system of governance, and why do Commonwealth countries such as Canada have this type of political system?
What will be an ideal response?