Gas in a container expands at a constant pressure of 3 atm. Find the work done (in J) by the gas if the initial volume is 5 liters and the final volume is 10 liters
a. 0
b. 150
c. 15
d. 1 500
e. 1.5
d
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Which of these is true of planetary nebulae?
A) They are the material which causes the eclipses in eclipsing binary systems. B) They are rings of material around protostars that will accrete into planets in time. C) They are the envelopes that form when blue stragglers merge. D) They are expelled by the most massive stars in their final stages before supernova. E) They are ejected envelopes surrounding a highly evolved low-mass star.
The element most abundant in the Sun is oxygen
a. True b. False Indicate whether the statement is true or false
Two parallel-plate capacitors have the same plate area, and the gap between the plates is filled with a dielectric with a dielectric constant equal to 6 . The gap in capacitor A is three times that in capacitor B. What is the ratio of the capacitance of A to B?
a. 1/3 c. 3 b. The ratio is not given. d. 18
Which element has the lowest mass per nuclear particle and therefore cannot release energy by either fusion or fission?
A) hydrogen B) oxygen C) silicon D) iron E) uranium