A series of ocean waves are moving past a surfer at a frequency of 40 waves per hour. Approximately how many waves would the surfer expect during 48 minutes?
a. 1920 waves
b. 32 waves
c. 40 waves
d. 50 waves
b
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Using Wien's law, you can measure the ____ of a distant object without having to travel to it
a. binding energy b. temperature c. radial motion d. energy output e. atomic composition
Encephalization Quotient (EQ) values can be estimated for extinct species because
A) there is a linear relationship between the EQ and time, thus allowing extrapolation B) extinct species always have the same EQ value C) we can estimate their body masses from their fossilized remains and their brain masses from the sizes of their fossilized cranial cavities D) we can always find similar species in existence today to make measurements of
Cosmological redshift is the result of ________
A) the high speeds at which galaxies move within clusters B) very old, red stars in distant galaxies C) the expansion of the universe D) supermassive black holes
A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?
A) 12 m/s B) 16 m/s C) 20 m/s D) 10 m/s