1) A rock was thrown horizontally from a 500.0 m high cliff. It strikes the ground 100.0 m from the base of the cliff. At
what speed was it thrown?

May someone explain how to do this question?

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce