To increase the temperature of 50 grams of water by 2 Celsius degrees requires
A) 0.04 calorie.
B) 2 calories.
C) 4.19 calories.
D) 25 calories.
E) 100 calories.
Answer: E
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Which of the following statements is true of the evolution of massive stars?
A) Once the gas in the core of a massive star has been converted to iron, there are no further nuclear reactions that can release energy. B) Once helium fusion has occurred, the core of the massive star will never get hot enough to fuse any additional elements. C) Silicon fusion produces neon, the most tightly bound of all atomic nuclei, which inhibits the release of energy after a nuclear fusion. D) The most massive blue giant stars can fuse elements heavier than iron in their cores.
Wave Characteristics: Which one of the following lists gives the correct order of the electromagnetic spectrum from low to high frequencies?
A. radio waves, infrared, microwaves, ultraviolet, visible, x-rays, gamma rays B. radio waves, ultraviolet, x-rays, microwaves, infrared, visible, gamma rays C. radio waves, microwaves, infrared, visible, ultraviolet, x-rays, gamma rays D. radio waves, microwaves, visible, x-rays, infrared, ultraviolet, gamma rays E. radio waves, infrared, x-rays, microwaves, ultraviolet, visible, gamma rays
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun
If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much B) one-half as much C) one-fourth as much D) twice as much E) times as much
One "food calorie" equals
a. 1 calorie c. 1000 calories b. 100 calories d. none of the above