In the summer, why does Alaska have longer days than Florida?
A. Alaska is a little bit closer to the Sun.
B. Alaska experiences much greater precession.
C. Alaska is a much larger area, so it receives more light.
D. Alaska is in the half of Earth that's illuminated longer by sunlight.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Could someone . i have tried to solve myself but my calculation is off

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.