Three identical objects are placed at sea level as follows: the first in Lebanon; the second at the equator; and the third at the North Pole. At which point is the object's
weight highest? At which point is it lowest? Explain your answers.​

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.