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ValentinkaMS [17]
3 years ago
12

Which is true of a mechanical wave?

Physics
2 answers:
morpeh [17]3 years ago
7 0

Answer: It must have a medium

Explanation: I took the test and wish you guys good luck! You'll do great, you got this!!!

mario62 [17]3 years ago
6 0
A mechanical wave must have a medium.

Hope this helps,
♥<em>A.W.E.<u>S.W.A.N.</u></em>♥
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What happens if you shoot a bullet in the air and lands on your head
ohaa [14]

Answer:

most of the time the bullet will not hurt you but sometimes can hurt or kill you.

3 0
3 years ago
The primary 40-turn coil of an ideal transformer is supplied with 120 V (rms). If the rms voltage output of the secondary coil i
Svet_ta [14]

Answer:

No. of turns in secondary coil are 5.

Transformer Type: STEP DOWN TRANSFORMER

Explanation:

The relationship of the no. of turns in transformer secondary and primary coils with their voltages is known as the turn ration. The formula for turns ratio is as follows:

Np/Ns = Vp/Vs

where,

Np = No. of turns in primary coil = 40

Ns = No. of turns in secondary coil = ?

Vp = Voltage supplied to primary coil = 120 V

Vs = Voltage output of secondary coil = 15 V

Therefore,

40/Ns = 120 V/15 V

Ns = 40/8

<u>Ns = 5</u>

TYPE OF TRANSFORMER:

Since, this transformer decreases the voltage value at the output. Hence it is a <u>STEP DOWN TRANSFORMER.</u>

7 0
4 years ago
A car is moving southwest at a velocity of 10 meters per second. Five seconds later, it's going 40 meters per second. What was t
Inga [223]

If "during this time" refers to the 5 second interval mentioned above, then the average acceleration is

\bar a=\dfrac{v-v_0}{t-t_0}=\dfrac{40\,\frac{\mathrm m}{\mathrm s}-10\,\frac{\mathrm m}{\mathrm s}}{5\,\mathrm s-0\,\mathrm s}

Notice that we took the start time to be the start of the 5 second interval and set that to t_0=0. The starting velocity v_0 is the velocity measured at the start of the interval, and v is the velocity measured at its end.

So the average velocity over these 5 seconds is

\bar a=\dfrac{30\,\frac{\mathrm m}{\mathrm s}}{5\,\mathrm s}=6\,\dfrac{\mathrm m}{\mathrm s^2}

6 0
4 years ago
Describe how the particles of a substance behave at its boiling point.
fgiga [73]
Particles begin to move out of their ordered arrangement due to energy. They are unable to escape because of external pressure pushing down on the liquid.
4 0
3 years ago
Explain the factors that affect capillary action
Allisa [31]

Answer:

Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules. The height to which capillary action will take water in a uniform circular tube (picture is up) is limited by surface tension and, of course, gravity.

6 0
3 years ago
Read 2 more answers
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