Problem 2: An elevator starts at rest on the ground floor. The elevator moves so that its acceleration is shown
as a function of time below.

(a) Is the elevator moving upward, moving downward, or at rest at time = 12 seconds? If the elevator is
moving, state its speed. In any case, explain your reasoning.
(b) Is the elevator moving upward, moving downward, or at rest at time t 22 seconds? If
the elevator is
moving, state its speed. In any case, explain your reasoning.

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.