Ahot (70°c) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g⋅°c. john drops the metal into a 500-g calorimeter containing 75 g of water at 20°c.
the calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g⋅°c.

when equilibrium is reached, what will be the final temperature? cwater = 1.00 cal/g⋅°c.

a. 114°cb. 72°cc. 64°cd. 37°c

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s