The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature increases
a. True
b. False
Indicate whether the statement is true or false
True
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Boat 1 goes directly across a stream a distance L and back taking a time t1 . Boat 2 goes down stream a distance L and back taking a time t2 . If both boats had the same speed relative to the water, which of the following statements is true?
a. t2 > t1 b. t2 < t1 c. t2 = t1 d. t2 = 2t1 e. t2 = 0.5t1
Which statement is correct about the relationship between the average speed and the magnitude of the average velocity for any motion?
A) The average speed is always one-half the magnitude of the average velocity. B) The average speed is always greater than or equal to the magnitude of the average velocity. C) The average speed can be less than, greater than or equal to the magnitude of the average velocity. D) The average speed is always less than or equal to the magnitude of the average velocity. E) The average speed is always equal to the magnitude of the average velocity.
The transit method seeks to detect planets by
A) precisely measuring distances to stars. B) directly detecting the light of planets orbiting stars. C) measuring small changes in the positions of stars on the sky. D) precisely measuring the velocities of stars moving toward and away from us. E) measuring small changes in the apparent brightness of stars.
Dispersing light from a hot, low-pressure gas gives a spectrum of the type known as (two words) ______________ ______________
Fill in the blank(s) with correct word