A busy housewife left 25 g of ice in an open insulated container while she was answering her cellphone. When she returned, the ice at 0 ºC was converted to water at 3.0 ºC. Calculate the energy needed for the ice to totally melt ad reach its present temperature(Assume no heat loss) specific heat capacity of water = 4200 J/kgK Specific Latent heat of fusion of Ice = 340 000J/Kg *

A55-kg pilot flies a jet trainer in a half vertical loop of 1200-m radius so that the speed of the trainer decreases at a constant rate. knowing that the plane has a speed of 550 km/h at point a, and the pilot experiences weightlessness at point c (i.e., the normal force from the seat bottom is zero), determine (a) the deceleration of the plane, (b) the force exerted on her by the seat of the trainer when the trainer is at point b.