200 g of ice at 0°c is dropped into a calorimeter of negligible heat capacity containing 350 g of water at 20°c. what is the temperature of the system when it reaches equilibrium? the latent heat of fusion of water is 80 cal/g. 200 g of ice at 0°c is dropped into a calorimeter of negligible heat capacity containing 350 g of water at 20°c. what is the temperature of the system when it reaches equilibrium? the latent heat of fusion of water is 80 cal/g. 13°c 0°c -24°c 24°c -13°c

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm