Shown below are the four terrestrial planets of our solar system. Assume that all the planets started out equally hot inside. Rank the planets based on their expected cooling rates, from fastest cooling to slowest cooling.
Answer: The picture above is a good example
Mercury, Mars, Venus, Earth.
Correct.
Smaller planets cool faster than larger planets for the same reason that smaller hot potatoes cool faster than larger hot potatoes: An object's total heat content depends on its volume, while its rate of heat loss depends on its surface area. Smaller objects have greater ratios of surface area to volume (the surface area-to-volume ratio) and therefore cool faster. Note that the differing cooling rates explain why the smallest planet, Mercury, has lost most of its interior heat by now, while the largest terrestrial planets — Venus and Earth — still are quite hot inside.
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An offspring born with altered DNA due to radioactivity, cosmic rays, or errors in reproduction
a. is called a mutant. b. is called a new species. c. is more likely to survive than if its DNA were not altered. d. is no different than if its DNA were unchanged. e. will never be able to reproduce itself.
Both rolling resistance and drag increase with increasing speed as the square of the speed
What will be an ideal response?
An FM radio station broadcasts at 96.7 MHz. What is the wavelength associated with this broadcast?
A) 3.1 m B) 0.32 m C) 2.9 × 1014 m D) 2.9 × 1016 m E) not enough information given
Light of colors 1 and 2 are sent through a prism and the rays of light of color 2 bend more. Which of the following is not true?
a. The index of refraction for color 2 is greater than that for color 1. b. The two colors of light have different frequencies associated with them. c. The speed of light for color 2 is greater than that for color 1 in this prism. d. The wavelength for color 1 is different than that for color 2 in this prism.