A penny is dropped from the top of the Empire State Building in New York City(h=831 m). What velocity does the penny hit the ground? How long does it take to hit the ground?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal