When a light wave enters into a medium of different optical density,

a. its speed and frequency change.

b. its speed, frequency, and wavelength change.

c. its speed and wavelength change.

d. its frequency and wavelength change?

A nuclear power plant generates waste thermal energy at a rate of 1000 MW = 1000 * 106 W. Assume the heat of vaporization of a water is 2.256 * 106 J/kg. A.

An elevator supported by a single cable descends a shaft at a constant speed. The only forces acting on the elevator are the tension in the cable and the gravitational force.

Which term defines the energy of motion? a. chemical energy b. electrical energy c. gravitational energy d. kinetic energy user: what is electromagnetic energy that travels in transverse waves? a. nuclear energy b. potential energy c.

Why is the heating element placed near the bottom of the kettle

In the equation e = mc2, what does c represent?

When blue light of wavelength 450 nm falls on a single slit, the first dark bands on either side of center are separated by 45.0

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration? 4 m/s2 in negative acceleration 4 m/s2 in positive acceleration 9 m/s2 in positive acceleration 9 m/s2 in negative acceleration

Two students walk in the same direction along a straight path at a constant speed-one at 0.90 m/s and the other at 1.90 m/s. •How far would the students have to walk so that the faster student arrives 5.50 min before the slower student? A.) 460s B.

During the process of accretion, each planet-in-the-making, or proto-planet, grew in size and mass. The amount of gravity for the proto-planets is best represented by which graph?

Theories and Laws. • How are they alike? • How are they different? • Can you explain why scientific theories will change over time? • Give an example of a scientific theory that has changed.