What is the function of the commutator in a DC motor

The impact of a sufficiently large asteroid or comet is one of the theories that have been put forward to explain why dinosaurs no longer exist. True or False

Anytime forces are are unbalanced what is the result?

The index of refraction of a type of glass is 1.50, and the index of refraction of water is 1.33. If light enters water from this glass, the angle of refraction will be

Engineers refer to any loose material on the surface of the Earth as soil. How does this differ from the definition used in Earth sciences?

if a volcano contained magma with small proportions of water and silica would you predict a nonexplosive eruption or an explosive one? why?

An object has a kinetic energy of 233 J and a momentum of magnitude 20.4 kg·m/s. Find the speed and the mass of the object.

What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 465 K? For m, use 0.0202 kg.

What type of visible light spectrum does the sun produce?

In order for a current to be maintained through a conductor a difference in must be maintained from one end of the conductor to the other end. potential power resistance conductivity

A rocket initially at rest acceleration at a rate of 99.0meter/second^2. Calculate the distance covered by the rocket if it attains a final velocity of 445 meters/seconds after 4.50 seconds.