Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

Energy is transferred.

Energy is increased.

Energy is decreased.

Energy is unchanged.

If an object moved in the same direction and at a constant speed for 4 hours, which of the following is true? a. the object's speed changed during the 4 hours b. the object; s velocity did not change c. the object accelerated during the 4 hours d.

The word oogenesis refers to

What is formed when sediment stick together

The force that generates the heat and light produced by the sun and other stars is 1. the electromagnetic force. 2. the weak force. 3. the strong force. 4. the gravitational force.

Corey, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 850 N for the first 3.0 s after the elevator starts to move, then 930 N for the next 3.0 s. What is the elevator's velocity 4.0 s after starting?

An ambulance is traveling east at 51.6 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 615 Hz. 32.3 m/s Car 51.

When a chemical reaction occurs with only one substance, what happens to the atoms of that substance?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

Which group of elements loses 1 electron easily?

What evidence can you cite for the particle nature of light? 1. Refraction phenomenon of light 2. The many colors of light 3. Diffraction phenomenon of light