Explain how sound is produced by school bell

The equation for density is mass divided by volume. the mass of a substance is changed so that it is made of fewer particles. If its volume is unchanged, how will its density change?

Atoms and elements are the basic back bone of the universe. Explain what this means and how the idea of the atom has changed over time.

What is a possible explination for why the giant ice caps that covered a supercontinent in the paleozoic era melted?

Three charges are located at 100-m intervals along a horizontal line: a charge of - 3.0 C on the left, 2.0 C in the middle, and 1.0 C on the right. What is the electric field on the horizontal line halfway between the - 3.0 C and 2.0 C charges?

What force is needed to accelerate an object 5 m/s if the object has a mass of 10kg?

which of the following objects is considered negatively charged A - one with excess electrons on the surface B - one with excess neutrons on the inside C - one with excess protons on the inside D - one with excess protons on the surface

In general, how do the densities of a material in solid and liquid form compare?

Alana summarized what happens when a ball sitting on top of a grassy hill rolls down the hill. The motionless ball has potential energy. Once the ball starts to roll down the hill, new kinetic energy is made.

What unit is commonly used when measuring the energy rating of an electrical appliance

Adding bleach to red food coloring causes the food coloring to lose its color it this physical or chemical change? Explain