The density of the air is 1.225 kg/m^3 and this room has a volume of of 300m^3. it takes 1006 joules of heat to change the temperature of a kg of air by 1 degree c. how much heat is needed to increase the temperature of the room by 5.5 degrees c during the course of a day?

Why there is no inductive reactance in dc circuits

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?