Which way does the direction arrow always points

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.

Which model displays the change in a gas when the temperature of the gaseous system decreases?

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked