A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is
A. 32 N.
B. 30 N.
C. 24 N.
D. 23 N.
E. 19 N.
D. 23 N.
Physics & Space Science
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The reason that a surface appears darker when wet has to do with
A) the darkness of liquids. B) conversion of light to lower frequencies. C) absorption of multiply-reflecting light inside the wet region.
Physics & Space Science
What type of stars do the spiral arms contain?
A.) The hottest, newest stars. B.) The coldest, newest stars. C.) The hottest, oldest stars. D.) The coldest, oldest stars. E.) Pecans and walnuts.
Physics & Space Science
A 100-W resistance heater is connected to a 110-V dc source. What is the current through the heater?
A) 1.1 A B) 2.2 A C) 3.3 A D) 4.4 A E) 0.91 A
Physics & Space Science
Characteristic x-rays are the result of
a. outer electron transitions. b. inner electron transitions. c. nuclear electron states. d. buckytubes.
Physics & Space Science