You throw a ball straight up into the air at a speed of 15 m/s.  you want to know how high above your hand the ball will be at exactly 2.5 sec after you released it. 

Which statement best explains why an object weight less on mercury than it does on earth

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

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.