5 How much heat is needed to raise 12kg of water from -25 degrees C to 75degrees C?​

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

How do you tell if someone actually cares about you? and just say they do?