a ball is dropped from rest at a 80m above the ground. How long does it take for it to reach the ground?

A metal sphere having an excess of + 5 elementary charges has a net electric charge of what? 1 8.0 ✕ 10-19 c 1.6 ✕ 10-19 c 3.2 ✕ 1019 c 5.0 ✕ 100 c

What are some ways houses along the coastlines can protect themselves from storm surges?

During which of the following chemical changes does a precipitate form? Select one: a. vinegar is added to baking powder b. lemon juice is added to water c. lemon juice is added to milk d. a banana ripens

What is the speed of a 0.145kg baseball if it's kinetic energy is 109 j

Consider a rabbit that is at x=8.1 m a t=0 and moves with a constant velocity of - 1.6 m/s. what is the equation of motion for the rabbit?

The amount or the strength of force is called its

An airplane in flight has a pressure difference between the lower and upper wing surface; this provides an upward force that balances the weight of the plane.

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Why does momentum have a direction?

What is the difference between weight and mass?