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3 years ago

Which two conditions must exist in order for radiation to occur?

Physics

2 answers:

Ostrovityanka [42]3 years ago

6 0

Answer:

Explanation:

Olenka [21]3 years ago

4 0

a temperature difference and the presence of electromagnetic waves

Explanation:

For radiations to occur, there must be presence of temperature difference and electromagnetic waves.

Radiation is a form of heat transfer that does not require a medium. Any hot body emits radiation from its surface.

A hot body is not at thermal equilibrium with its environment.

It has some of its electrons in excited state and by so they emit radiations.

Electromagnetic waves that vibrates transversely emits radiations. This is the mode of heat transfer in place for most electromagnetic waves

learn more:

Electromagnetic radiation brainly.com/question/6818046

#learnwithBrainly

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Web Spiders and Oscillations All spiders have special organs that make them exquisitely sensitive to vibrations. Web spiders det

chubhunter [2.5K]

Complete Question

The complete quetion is shown on the first uploaded image

Answer:

Explanation:

From the question we are told that

The mass of the fly is $m_f = 11 mg = 11*10^{-3} g = 1.1*10^{-5} \ kg$

The extension of the web is $e= 4.00 \ mm = 0.004 \ m$

The spring constant is mathematically evaluated as

$k = \frac{mg}{e}$

substituting values

$k = \frac{1.1 *10^{-5} *9.8}{0.004}$

$k = 0.027 \ N/m$

The frequency of vibration is

$f = \frac{1}{2 \pi} \sqrt{\frac{k}{m} }$

substituting values

$f = \frac{1}{2 * 3.142 } \sqrt{\frac{0.027}{1.1*10^{-5}} }$

$f = 7.9 Hz$

8 0

3 years ago

In all collisions, both elastic and inelastic, which quantity must be conserved?

Paraphin [41]

Answer:

Momentum is conserved.

All of the others are not conserved because of heat loss caused by deformation, etc.

4 0

3 years ago

Please help me with this.

GenaCL600 [577]

I think the answer would be d hope your successful

5 0

3 years ago

4. [01.03]

Likurg_2 [28]

Skates. An object in motion stays in motion unless an equal amount of force is applied back. She put out more force than what she was giving so it pushed her back

7 0

3 years ago

How to convert 7500kilometers to meters

Kazeer [188]

Answer:

7500000 metres

Explanation:

1 kilometre = 1000 metres

so 7500 kilometres would equal to 7500000 metres

7 0

3 years ago