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HyperT1676
HyperT1676
27.03.2020 • 
Biology

Caleb counts the number of waves that pass a given point in a certain amount of time on the beach. What property of waves does Caleb measure?

Question 6 options:

period

frequency

amplitude

wavelength

The types of waves: mechanical and electromagnetic. Microwaves, Infrared waves, and radio waves are examples of electromagnetic waves. Which statement is true about the speed of an electromagnetic wave?

Question 7 options:

It is not affected by changes in media.

It is slower in a vacuum than in a medium.

In a vacuum, its speed equals half the speed of light.

It slows down when it goes from a vacuum to a medium

Properties of waves can be applied to other situations. Suppose a cafeteria worker counts the number of students going through the lunch line every hour. What property, which can also be measured for a wave, is he measuring?

Question 9 options:

period

frequency

amplitude

wavelength

Our eyes detect light that lies only within a small region of the electromagnetic spectrum. This region is called visible light. Which of these statements describes the visible spectrum of light as seen by the human eye?

Question 10 options:

The lowest frequency appears red, and the highest frequency appears Violet.

The lowest frequency appears green, and the highest frequency of hair is red.

The lowest frequency appears blue, the highest frequency appears orange.

The lowest frequency appears yellow, and the highest frequency appears green.

What is one way that electromagnetic waves differ from mechanical waves?

Question 11 options:

Electromagnetic waves move slower.

Electromagnetic waves are longitudinal.

Electromagnetic waves can travel through empty space.

There is no difference between them.

How does the sun transfer energy to Earth?

Question 12 options:

By making earth spin

By mechanical waves

By electromagnetic waves

By the Earth revolving around the Sun

Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how the visible energy from the Sun is different from nonvisible energy?

Question 13 options:

It travels at a different speed.

It travels at a different distance.

It has different wavelengths.

It has different amplitudes.

PLEASE HELP ME :

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