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MariettaO [177]
3 years ago
9

3. A skater moves across the ice a distance of 12 m before a constant frictional force of 15 N cause him to stop. His initial sp

eed is 2.2 m/s . Calculate the skater's mass.
Physics
1 answer:
RSB [31]3 years ago
6 0

Explanation:

thankyou fo

r the poimts

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A laser is shone through a double slit and a particular interference pattern is observed on a screen some distance away. If the
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If the separation between the openings in a laser is increased, then the distance between the interference fringes decreases

<h3>What is Interference fringe ?</h3>

Interference fringe refers to bands caused by different lights which can be found in phase or not each other.

  • Distances between laser fringes are short which is due to light wavelength.
  • The interference fringes can be estimated by knowing slit separation and wavelength.

In conclusion, if the separation between the openings in a laser is increased, then the distance between the interference fringe decreases

Learn more about Interference fringe here:

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5 0
2 years ago
A diffraction grating is illuminated simultaneously with red light of wavelength 670 nm and light of an unknown wavelength. The
marusya05 [52]

Answer:

dsin∅ = m× λ

so, dsin∅red = 3(670nm)

also, dsin∅? =5λ?

however ,if they overlap then dsin∅red = dsin∅?

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∴λ = 402nm

Explanation:

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3 years ago
What is the potential energy of a 30 Newton ball that is on the ground
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The potential energy of a 30N ball on the ground will be zero. With respect to height, h. Potential energy will be calculated like this. P=mgh. So if its on the ground relatively speaking the h=0. Thus inputting into the above formula. P=0.
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How does friction affect the distance of an object?
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It slows the object down so it cannot move well and evetually the object cannot be pushed and farther
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