4 years ago

3. In which activity is no work done?

1 answer:

6 0

Answer:

Sleeping, since your brain is working, but your physical body is not moving at all or moving rarely, therefore there is no work done in the activity of sleeping.

Explanation:

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A rough surface for infrared waves may be polished for

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Answer:

Radio Waves

Explanation:

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3 years ago

On a highway curve with a radius of 46 meters, the maximum force of static friction that can act on a 1,200 kg car going around

Mekhanik [1.2K]

Answer:

$v\approx 16.956\,\frac{m}{s}$

Explanation:

The motion of the vehicule on a highway curve can be modelled by the following equation of equilibrium:

$\Sigma F = f = m\cdot \frac{v^{2}}{R}$

The maximum speed is:

$v = \sqrt{\frac{f\cdot R}{m} }$

$v = \sqrt{\frac{(7500\,N)\cdot (46\,m)}{1200\,kg} }$

$v\approx 16.956\,\frac{m}{s}$

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4 years ago

What is used to block the UV light during screen development process to create a stencil in the emulsion

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Answer:

Invisible UV energy reacts with emulsion sensitizer and hardens the stencil so it won't dissolve with water and rinse down the drain

Explanation:

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2 years ago

What’s the equalibrium rule?

ale4655 [162]

The vector sum of forces acting on a non-accelerating object equals zero.
equation form: ΣF = 0

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3 years ago

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Mason notices that his boat sinks lower into the water in a freshwater lake than in the ocean. What could explain this?

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Salt water is more dense than freshwater.

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