3.0 moles of gas expand from an initial volume of 0.040 m3 to a final volume of 0.085 m3 while the temperature of the gas is kept fixed at 300 K. How much work is done by the system?
A) 5.6 kJ
B) 6.6 kJ
C) 7.6 kJ
D) 8.6 kJ
E) 14 kJ
A
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Suppose that a white dwarf is gaining mass through accretion in a binary system. What happens if the mass someday reaches the 1.4 solar mass limit?
A) The white dwarf will collapse in size, becoming a neutron star. B) The white dwarf will undergo a nova explosion. C) The white dwarf will explode completely as a white dwarf supernova. D) The white dwarf will collapse to become a black hole.
The absolute value of the electric potential at a distance of 4 m from a certain point charge is 200 V. What is the absolute value of this potential at a distance of 2 m from the same charge?
A) 200 V B) 50 V C) 400 V D) 100 V E) 600 V
In the Bohr model, the higher the value of n, the farther from the nucleus the electron is located. In the quantum model, the higher the value of n, the farther from the nucleus the electron ______________ is located
Fill in the blank(s) with correct word
Microfossils found in northwestern Australia in 2011 appear to have been
A) photoheterotrophs B) chemoheterotrophs C) photoautotrophs D) chemoautotrophs