If the temperature and pressure of an ideal gas is tripled, what is the ratio of the new volume to initial volume?
A. 1
B. 9
C. 3
D. 0.33
C. 3
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Three boxes in contact rest side-by-side on a smooth, horizontal floor. Their masses are 5.0-kg, 3.0-kg, and 2.0-kg, with the 3.0-kg box in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes
(a) Draw the free-body diagrams for each of the boxes. (b) What magnitude force does the 3.0-kg box exert on the 5.0-kg box? (c) What magnitude force does the 3.0-kg box exert on the 2.0-kg box?
How much current must pass through a 400-turn ideal solenoid that is 4.0 cm long to generate a 1.0-T magnetic field at the center? (?0 = 4? × 10-7 T ? m/
A) A) 0.013 A B) 13 A C) 22 A D) 40 A E) 80 A
As the universe cooled, it eventually reached a temperature of 3,000 K and protons were able to capture and hold electrons to form neutral hydrogen. This process is known as
a. ionization. b. isotropy. c. annihilation. d. recombination. e. hydration.
For life to have existed continually on the Earth for the past 4 billion years, the oceans must have been
A) completely liquid for this entire time B) frozen for most of this time C) partially liquid for most of this time D) partially frozen for most of this time