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baherus [9]
3 years ago
9

"Chief accelerator" is an American idiom. The term "communist virus" must also have come from the United States. Since the outbr

eak of the virus, the whole world has been affected. China has achieved good results in epidemic prevention and control, and also offered some help to other countries. We have worked together to overcome difficulties.
Physics
1 answer:
Bas_tet [7]3 years ago
4 0

Answer:

What's the question?

Explanation:

...........

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A piano wire with mass 2.60g and length 84.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplit
likoan [24]

Answer:

Power will be 0.2023 watt

And when amplitude is halved then power will be 0.0505 watt

Explanation:

We have given mass of the Piano wire m = 2.60 gram = 0.0026 kg

Length of wire l = 84 cm = 0.84 m

So mass density \mu =\frac{m}{l}=\frac{0.0026}{0.84}=0.0031kg/m

Tension in the wire T = 25 N

Frequency f = 120 Hz

So angular frequency \omega =2\pi f=2\times 3.14\times 120=753.6rad/sec

And amplitude A = 1.6 mm = 0.0016 m

We have to find the generated power

Power is given by P=\frac{1}{2}\sqrt{\mu T}\omega ^2A^2=\frac{1}{2}\times \sqrt{0.0031\times 25}\times 753.6^2\times 0.0016^2=0.2023watt

From the relation we can see that power P\ \propto\ A^2

So if amplitude is halved then power will be \frac{1}{4} times

So power will be equal to \frac{0.2023}{2}=0.0505watt

4 0
3 years ago
Describe the change in motion and kinetic energy of the particles as thermal energy is removed from a liquid. Which change of st
Kobotan [32]

Answer:

Change in state from liquid to solid.

Explanation:

Decrease in thermal energy will decrease energy and particles will slow down. Change in state from liquid to solid.

8 0
3 years ago
Why do we get food????​
Harlamova29_29 [7]
Unmmm to eat so we don't die
7 0
3 years ago
Read 2 more answers
How does a arrow represent displacement
Lera25 [3.4K]

Answer:

An arrow represents displacement. Because it's a vector quantity.

Vector quantity= Direction+Magnitude

When an arrow is put above a unit like

  • acceleration
  • displacement

it means that it's a vector quantity.

Hope this helps ;) ❤❤❤

4 0
4 years ago
A bungee jumper jumps off a bridge and bounces up and down several times.
Stella [2.4K]

The energy that was lost due to air resistance while she was bouncing is determined as 3,360 J.

<h3>Conservation of energy</h3>

The amount of energy lost due to  air resistance while she was bouncing is determined from the principle of conservation of energy.

ΔE = P.E - Ux

ΔE = mgh - ¹/₂kx²

ΔE = (50)(9.8)(16) - ¹/₂(35)(16)²

ΔE = 3,360 J

Thus, the energy that was lost due to air resistance while she was bouncing is determined as 3,360 J.

Learn more about energy here: brainly.com/question/13881533

#SPJ1

3 0
2 years ago
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