5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much

The temperature of the aluminium pan was decreased by the 117.25 Kelvins.

Explanation:

Energy given by the aluminium pan =Q= -5400 J

Negative sign indicates that energy is released by the aluminium pan.

Mass of the pan=m = 50 g = 0.05 kg(1000g = 1kg)

Change in temperature =

Specif heat of he aluminium = c = 921.096J/kg K

The negative value of change is temperature means that temperature of the aluminium pan was decreased by the 117.25 Kelvins.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards