3. Two carts of identical mass are free to move along a straight, frictionless track. At time t, cart X is moving at 2.0 m/s when it collides with and sticks to cart Y, which is initially at rest. Which of
the following graphs best shows the velocity of cart X before and after the collision?
(A)
Velocity (m/s)
Velocity (m/s)
11
Time (s)
Time (s)
(B)
(D)
Velocity (m/s)
Velocity (m/s)
+
0
11
Time (s)
11
Time (s)
-

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.