Physics B Final Exam

What is the first law of thermodynamics?

• Energy can be destroyed completely

• Energy can be converted into matter

• Energy cannot be created or destroyed

• Energy can be created out of nothing

Explain the second law of thermodynamics.

• The second law of thermodynamics states that heat always flows from a colder body to a hotter body.

• The second law of thermodynamics states that energy can be created out of nothing.

• The second law of thermodynamics states that entropy always decreases in an isolated system.

• The total entropy of an isolated system is always increasing.

What is the electromagnetic spectrum?

• The range of all types of visible light

• The range of all types of ocean waves

• The range of all types of sound waves

• The range of all types of electromagnetic radiation

____ are good at allowing energy to flow through them

• Bacteria

• Conductors

• Insulators

• Non-metals

Differentiate between conductors and insulators.

• Conductors and insulators have no difference in their ability to conduct electricity.

• Conductors allow the flow of electric current, while insulators do not.

• Conductors are used to block electricity, while insulators are used to conduct it.

• Conductors prevent the flow of electric current, while insulators allow it.

What are the properties of waves?

• Waves have properties such as taste, smell, and temperature.

• Waves have properties such as color, texture, and shape.

• Waves have properties such as size, weight, and density.

• Waves have properties such as amplitude, wavelength, frequency, and speed.

Explain the behavior of waves when they encounter obstacles.

• Accelerated

• Diverted

• Reflected, refracted, diffracted, or absorbed

• Stopped

Describe the photoelectric effect and its significance.

• The photoelectric effect is the phenomenon where sound waves are emitted from a material when it is exposed to light. It is significant because it proved the wave nature of light and led to the development of classical mechanics.

• The photoelectric effect is the phenomenon where electrons are emitted from a material when it is exposed to light. It is significant because it provided evidence for the particle nature of light and led to the development of quantum theory.

• The photoelectric effect is the phenomenon where photons are emitted from a material when it is exposed to electricity. It is significant because it proved the particle nature of light and led to the development of special relativity.

• The photoelectric effect is the phenomenon where protons are emitted from a material when it is exposed to heat. It is significant because it provided evidence for the wave nature of light and led to the development of general relativity.

Evidence suggests that light is made of ____

• Particles

• Neutrons

• Atoms

• Waves

Short wavelengths carry more energy

• True

• False