We can rule out a connection between changes in the Sun's luminosity and the global warming that is currently occurring on Earth because
A) the Sun's luminosity has remained fairly steady even as Earth's temperature as increased.
B) the Sun is too far away to affect Earth's climate.
C) changes in the Sun's luminosity cannot occur on the time scale over which global warming has occurred.
D) Earth's atmosphere prevents changes in the Sun's luminosity from having any effect on Earth's surface.
A) the Sun's luminosity has remained fairly steady even as Earth's temperature as increased.
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First Law of Thermodynamics: The figure shows a pV diagram for a gas going through a cycle from A to B to C and back to A. From point A to point B, the gas absorbs 50 J of heat and finds its internal (thermal) energy has increased by 20 J. Going from B to C, the internal (thermal) energy decreases by 5.0 J.(a) How much work was done by the gas from A to B?(b) How much heat was absorbed by the gas from B to C?(c) How much work was done by the gas going from B to C?
What will be an ideal response?
An annular eclipse of the Sun occurs when the Moon doesn't quite cover the Sun in the zone of totality. This means that the Moon is
A) closer than usual to Earth. B) farther than usual from Earth. C) none of these
What is the momentum of a 600. nm photon?
A) 2.07 N-s B) 2.07 eV/c C) 2.07 KeV/c D) 2.07 MeV/c E) 2.07 kN-m
If an object falls with constant acceleration, the velocity of the object must
A) be constant also. B) continually change by the same amount each second. C) continually change by varying amounts, depending on its speed. D) continually decrease. E) none of the above