9.0 g of water in a 2.0-L pressure vessel is heated to 300°C. What is the pressure inside the container? (R = 0.082 L • atm/mol • K, one mole of water has a mass of 18 grams)
a. 12 atm
c. 24 atm
b. 16 atm
d. 32 atm
A
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When an electron collides with a positron the two particles
A) fuse to form a heavier particle B) bounce off each other C) are destroyed, producing a pair of high-energy gamma rays D) are destroyed, producing another pair of particles
The structural region of Earth that has the greatest volume is the
a. crust. b. outer core. c. mantle. d. inner core.
A 45-mH inductor is connected in series with a 60-? resistor through a 15-V dc power supply and a switch. If the switch is closed at t = 0 s, what is the current after 7.0 ms?
A) 250 mA B) 650 mA C) 550 mA D) 280 mA E) 850 mA
Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2 sin (4x) cos (3t) where x is in m and t is in s. What is the speed (in m/s) of the interfering waves?
a. 0.75 b. 0.25 c. 1.3 d. 12 e. 3.0