Convert 3.5 km/hr to m/s

Why is it difficult to use the law of conservation of energy to calculate the effects of a collision? O A. Energy is not conserved. O B. Energy is only conserved during perfectly inelastic collisions. O C.

When the current through an electromagnet ceases, what generally happens to the magnetic field? A. The magnetic field stays the same. B. The magnetic field eventually disappears. C. The magnetic field eventually gets stronger. D.

If the mass of a material is 43 grams and the volume of the material is 14 cm^3, what would the density of the material be?

The impulse of a constant force is equal to

What actions can be explained by physics?

A force between two objects?

Two iron rods are placed horizontally, touching end-to-end. One end of one rod is heated. After some time, the other rod also feels warm to touch.

Which part of the motor is responsible for reversing the flow of current?

In a generator, as the magnet spins, opposite poles of the magnet push the electrons in opposite directions. This back-and-forth movement of electrons is called what? A) revolutions per minute B) direct current C) alternating current.

A train travels at a speed of 30 miles/hour and traveled a distance of 240 miles. How long did it take the train to complete its journey?