The image of a convex mirror is always virtual, ______________, and smaller
Fill in the blank(s) with correct word
upright, or erect
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Two dogs, Rover and Fido, run on a level frictionless surface. Rover runs eastward with a momentum of 24 kg . m/s, and Fido runs northward with momentum 10 kg . m/s
They make a sudden perfectly inelastic collision. What is the magnitude of their combined momentum after the collision? A) 14 kg . m/s B) 26 kg . m/s C) 34 kg . m/s D) It cannot be determined without knowing the masses and velocities of the dogs.
The specific heat of soil (average value) is one-fourth of a calorie per gram degree Celsius. Explain why water is a better moderator of temperature than soil
Apparent weightlessness can be experienced in freely falling elevator
Indicate whether the statement is true or false
Soon after discovery, it was observed that quasars had a starlike appearance which was blurred by Earth's atmospheric "seeing". Despite the blurring, it was realized that the intense energy-emitting regions of quasars must be small because they
a. have high radial velocities. b. are very luminous. c. are surrounded by quasar fuzz. d. radiate huge amounts of energy. e. fluctuate rapidly on time scales as short as a few hours.