2023 Summer notes

Question 1

How many Hz are in a kHz?

Answer 1

1000Hz = 1kHz

Question 2

How many Hz are in a MHz?

Answer 2

1MHz = 1000 000 Hz
1MHz = 1000 x 1000 Hz

Question 3

How may Hz are in a GHz?

Answer 3

1 GHz = 1 000 000 000 Hz
1GHz = 1000x 1000x 1000 Hz

Question 4

What is refraction?

Answer 4

When a wave enters a new medium and changes direction

Question 5

What causes refraction?

Answer 5

The wave slowing down or speeding up as it enters a new medium

Question 6

What happens to the wavelength of a wave if it enters a slower medium?

Answer 6

The wavelength decreases.

Question 7

Weight is the amount of ____________________________. Weight is measured in ___________.

Answer 7

Weight is the amount of force which gravity pulls on an object with. Weight is measured in Newtons.

Question 8

Mass is the amount of …………………………………………………………………………………………………………………… . Mass is measured in ……………… or ………………………..

Answer 8

Mass is the amount of matter that something is made of. Mass is measured in** grams (g)** or kilograms (kg).

Question 9

What is the formula for weight?

Answer 9

Weight = mass x gravitational field strength