Phy sci B unit 3 waves alternate test.

Mechanical waves are defined by which of the following?
A. Carries energy from one place to another
B. Is created when an energy source makes a vibration
C. All of the above

Mechanical waves need an energy source to produce them?
true
or
false

A wave has a wavelength of 100 mm and a frequency of 6 Hz. What is its speed?

600 mm/s
106 mm/s
16.7 mm/s

Amplitude of a wave is?

A. The measurement from the top of one crest to another
B. How high the wave is from resting point
C. How many waves occur in one second

It’s a really long test so if you know all the answers please put them in your answer!!

Mechanical waves are defined by which of the following?

C. All of the above

Since, mechanical waves are created when an energy source vibrates, and they carry energy from one place to another through a medium, this is the right option.

Mechanical waves need an energy source to produce them?

True because a mechanical wave needs an initial energy input.

A wave has a wavelength of 100 mm and a frequency of 6 Hz. What is its speed?

600 mm/s

Wave speed = wavelength X frequency

Wave speed = 100 X 6

Wave speed = 600 mm/s

Amplitude of a wave is?

B. How high the wave is from resting point

By definition of amplitude.

i think the answer would be reserve.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.