When a 4-cubic-ft block of wood floats in a fluid whose weight density is 60 pounds per cubic foot, 3/4 of the block's volume is submerged. The buoyant force on the block is __________
Fill in the blank(s) with correct word
180 lbs
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Which of the following statements is true of the nuclear reactions in the Sun?
A) They take place only near the center. B) They take place only near the surface. C) They are entirely endothermic reactions. D) They occur at temperatures less than 100,000 K.
The Very Large Array radio telescope in New Mexico is an example of the use of which astronomical technique?
a. spectral analysis b. photometry c. interferometry d. resolving power e. cosmic analysis
Equilibrium: In the figure, a 10-lb weight is suspended from two spring scales, each of which has negligible weight. Which one of the following statements about the readings in the scales is true?
A. Each scale will read 5 lb. B. The top scale will read zero, the lower scale will read 10 lb. C. The lower scale will read zero, the top scale will read 10 lb. D. Each scale will show a reading between one and 10 lb, such that the sum of the two is 10 lb. However, exact readings cannot be determined without more information. E. None of these is true.
Speed is to velocity as distance is to
A) magnitude. B) acceleration. C) displacement. D) direction. E) temperature.