An autographed baseball rolls off of a 0.91 m high desk and strikes the floor 0.84 m away from the desk. How fast was it rolling on the desk before it fell off? The acceleration of gravity is 9.81 m/s2.

Which of the following machines most likely has the greatest efficiency? a A. Airplane B. Automobile C. Bicycle D. Human body

How high would you have to go in the atmosphere for half of the mass of air to be below you?

Rills, gullies, streams, rivers and tributaries are all caused by

A basketball is rolling with a velocity of 0.5 meters/second relative to the ground and due north. A tennis ball is rolling with a velocity of 0.25 meters/second relative to ground in the same direction of the basketball.

1. Who makes up the 538 Electoral College Votes?

West of a city, a certain eastbound route is straight and makes a steep descent toward the city. The highway has a 14% grade, which means that its slope is - 14 100.

If animal DNA is injected into a human, what would happen?

Give one word which means the same as 'moving with a negative acceleration '

This is a bond in which a single pair of electrons is shared between a pair of atoms

A hole of radius r is bored through the center of a sphere of radius r. Find the volume v of the remaining portion of the sphere.