Point "A" is located  above a charge and point "B"is located below the same charge. A second charge of moves from point "A" to point "B". Calculate the change in potential energy.

A charge "A" of is separated from another charge "B" of .

Indicate the ammount of heat lost by  of silver that changes its temperature from to . (Express in negative if needed).

Indicate the temperature variation of  of copper that absorbs .

Indicate the amount of Joules needed to elevate the temperature of of aluminium from to .

Calculate the mass in kg of mercury that changed its temperature from  to and absorbed .

A mass of gold has a temperature of and absorbed . Indicate the final temperature.

Calculate the final temperature of a concrete bridge (alpha=1.2x10^-5). On the morning at a temperature of it has a length of and then it increases its length . Use 5 decimals.

Calculate the final length of a copper pipe in meters if its original length is  at if temperature changes to .

Use 5 decimals 

Calculate the decrease of temperature of a lead sphere with a diameter of to decrease its volume ?

Use 5 decimals.