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netineya [11]
3 years ago
10

What type of wave is sound

Physics
1 answer:
Afina-wow [57]3 years ago
6 0
Sound is a longitudinal wave, because the vibration of the molelecules occurs in the same direction of propagation of the wave.

In fact, a sound wave consists of alternating regions of air compression and rarefaction, and these regions "oscillate" in the same direction of propagation of the wave, so this is a longitudinal wave.
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True or False. The pressure inside a piston is the same in all directions.
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Answer:

True

Explanation:

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1. How is power defined? *
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how much water is needed to produce 1kwh of electricity at a power plant that is 30% efficient if the temperature increase 10 C
Dimas [21]

The amount of water needed is 287 kg

Explanation:

The amount of energy that we need to produce with the power plant is

E=1 kWh = (1000W)(1h)=(1000W)(3600s)=3.6\cdot 10^6 J

We also know that the power plant is only 30% efficient, so the energy produced in input must be:

E_{in}=\frac{E}{0.30}=\frac{3.6\cdot 10^6}{0.3}=1.2\cdot 10^7 J

The amount of water that is needed to produce this energy can be found using the equation

E_{in}=mC\Delta T

where:

m is the amount of water

C=4186 J/kg^{\circ}C is the specific heat capacity of water

\Delta T=10^{\circ}C is the increase in temperature

And solving for m, we find:

m=\frac{E_{in}}{C\Delta T}=\frac{1.2\cdot 10^7}{(4186)(10)}=287 kg

Learn more about specific heat capacity:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

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3 years ago
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