The acceleration of an object as a function of time is given by a(t) = (3.00 m/s3)t, where t is in seconds
If the object has a velocity 1.00 m/s at time t = 1.00 s, what is the displacement of the object between time t = 2.00 s and time t = 4.00 s?
A) 33.0 m
B) 30.0 m
C) 36.0 m
D) 27.0 m
D
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The primary reason few SSTs were ever built was because a. SSTs endangered the ozone layer. b. SSTs were not economically viable. c. the technology was risky and the planes likely to disintegrate in flight. d. computers predicted that the bow wave would cause oxygen to recombine with nitrogenin the air
e. SSTs travel through the stratosphere.
Which of the following statements comparing halo stars to our Sun is not true?
A) Most stars in the halo have either died or are in their final stages of life, while the Sun is only in about the middle of its lifetime. B) Most stars in the halo have cooler surface temperatures than the Sun. C) Most stars in the halo are less luminous than the Sun. D) Most stars in the halo contain a much lower percentage of heavy elements than the Sun.
A convex lens is thinnest in its center; it refracts light to a focus, while a convex mirror reflects it to the focus instead
Indicate whether the statement is true or false
A refrigerator has a coefficient of performance of 4 . If the refrigerator absorbs 30 cal of heat from the cold reservoir in each cycle, the heat expelled (in cal) into the heat reservoir is
a. 40.5 b. 37.5 c. 36.5 d. 34.5 e. 22.5