Light travels from one place to another along a path of least
A) distance.
B) time.
C) effort.
D) expense.
E) complication.
Answer: B
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Fragments that do not completely burn in the atmosphere and eventually fall on Earth are called
A. asteroids. B. meteoroids. C. meteorites. D. meteors.
A driver in a car traveling at slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the level road is 0.80, how long will the skid marks be?
A) 37 m B) 30 m C) 46 m D) 34 m
A bird, accelerating from rest at a constant rate, experiences a displacement of 25 m in 15 s. What is the final velocity after 15 s?
a. 2.5 m/s b. 1.7 m/s c. 3.3 m/s d. 3.8 m/s e. zero
Which of the following is an example of a longitudinal wave?
a. sound wave in air c. both a and b b. wave traveling in a string d. neither a nor b