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zhuklara [117]
3 years ago
10

Please help, what's the efficiency of the two pulleys​

Physics
1 answer:
lutik1710 [3]3 years ago
5 0

Answer:20cm

Explanation:

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A large ant is standing on the middle of a circus tightrope that is stretched with tension T_s. The rope has mass per unit lengt
k0ka [10]

Answer:

A = \frac{g \lambda^2 \mu}{4\pi^2 T_s}

Explanation:

As we know that the speed of the wave in string is given as

v = \sqrt{\frac{T_s}{\mu}}

now we will have

frequency of the wave is given as

f = \frac{v}{\lambda}

f = \frac{1}{\lambda}\sqrt{\frac{T_s}{\mu}}

now if the ant will feel weightlessness then we will have

mg = m\omega^2 A

so we will have

A = \frac{g}{\omega^2}

A = \frac{g}{4\pi^2 f^2}

A = \frac{g \lambda^2 \mu}{4\pi^2 T_s}

3 0
4 years ago
How do you balance this equation Mg+ O2= MgO
Anuta_ua [19.1K]

Answer:

2 Mg(s) + O2(g) → 2 MgO(s)

As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium oxide would be represented as MgO. It is insoluble in water, hence it has the subscript as a solid, represented by (s). In order to use up the diatomic oxygen (O2), there needs to be two moles of magnesium (2Mg) on the reactant side. This would produce 2 moles of MgO on the product side.

Explanation:

8 0
4 years ago
What type of bulb is unaffected ​
emmasim [6.3K]
<h2>A N S W E R : –</h2>

  • c) Parallel

Nothing happens to the brightness of the light bulbs in the parallel circuit if the power supply is capable of supplying the additional current.

3 0
2 years ago
Sort the sentences based on whether they describe radio waves, visible light waves, or both.
valentina_108 [34]

The electromagnetic spectrum includes a continuous spectrum of wavelengths that include:

Radio waves, microwaves, infrared light, visible, ultraviolet, X-rays, gamma rays

The wavelength decreases from radio waves to gamma rays, whereas the energy increases along the same direction.

In the given example, radio waves have a lower energy and higher wavelength than visible light. The latter can be perceived by the human eye, whereas radio waves are not visible to the human eye.

1) They have colors = visible light

2) They can travel in a vacuum  = both

3) They have energy = both

4) They’re used to learn about  dust and gas clouds = radio waves

5) They’re used to find the  temperature of stars  = visible light

6)They’re invisible = radio waves

6 0
4 years ago
A boy rides a sled down a steep, snow.covered hill. Which of
Travka [436]

Answer:

a. Potential energy decreases and Kinetic energy increases

Explanation:

Because as he comes down due to its steepness the speed of the boy or you can say his KE increases and since he comes from a high position (hill) to the lower ground his potential energy decreases simultaneously

4 0
3 years ago
Read 2 more answers
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