2) In order to generate electricity from mechanical energy, one essential element needed to transform the energy into electrical energy is

A uniform-density 8 kg disk of radius 0.25 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 41 N through a distance of 0.9 m.

When dr. hewitt drops a book and a crumpled piece of paper together from the same height, which one hits the ground first?

Which three quantities can be used to calculate acceleration? a. velocity, position and mass b. time, distance and position c. initial velocity, time and force d. time, initial velocity and final velocity

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?

How much heat is released when 30 g of water at 96°C cools to 25°C? The specific heat of water is 1 cal/gºC. Oa b ano 2,130 cal 0.213 cal -2,130 cal -0.213 cal

What are the 4 rules of seismic waves?

Who did bohr's Modem of the atom include that Rutherford's model did not have

Water's heat of fusion is 80 cal/g. Its specific heat is 1.0 cal/g degrees celsius, and its heat of vaporization is 540 cal/g. A canister is filled with 330g of ice and 100g of liquid water, both at 0 degrees celsius.

Catalytic ozone destruction occurs in the stratosphere by a two-step reaction:

The atomic radii of a divalent cation and a monovalent anion are 0.35 nm and 0.129 nm, respectively. (a) Calculate the force of attraction between these two ions at their equilibrium interionic separation (i. e.