In most energy sources, such as fossil fuels, where is the energy originally derived from?
a. the sun
b. the earth's core
c. the magnetic poles
d. the ocean currents

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

If the new moon happens on january 15th, what shape will it be on february 6th?

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s