1 A 5 g piece of ice at -20°C is put into 10 g water at 30°C. Assuming that the heat exchange is only
between the water and ice, find the final temperature of the mixture (10). Specific heat capacity of
ice and water are respectively 2100 J Kg-1 °C-1 and 4200 J Kg-1 °C-1, while the latent heat of
fusion of ice is 3.36 x 105 J Kg-1.​

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Orange juice has a lower or higher viscosity than chocolate syrup

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