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ElenaW [278]
3 years ago
7

Do ultraviolet glasses help you?

Physics
1 answer:
Svetllana [295]3 years ago
3 0

Answer:

To really help protect your eyes, a good pair of ultraviolet glasses will reduce the UV rays that reflect off the backside of your lenses by adding an antireflective (AR) coating that cut down the reflection of both UV and visible light.

Explanation:

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d

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Energy that is the sum of potential and kinetic energy is
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The correct answer would be B.

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How does applying oil to a bicycle help the bicycle to work better?
dmitriy555 [2]
It Reduces Friction. !

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2. Classify Identify the following materials as thermal conductors or
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5 0
3 years ago
A crate is sliding down a ramp that is inclined at an angle 30.6 ° above the horizontal. The coefficient of kinetic friction bet
Vlada [557]

Answer:1.95 m/s^2

Explanation:

Given

inclination \theta =30.6^{\circ}

coefficient of kinetic friction \mu =0.36

As crate is moving Down therefore friction will oppose the motion

using FBD

mg\sin \theta -f_r=ma

f_r=\mu N

f_r=\mu mg\cos \theta

mg\sin \theta -\mu mg\cos \theta =ma

a=g\sin \theta -\mu g\cos \theta

a=g(\sin (30.6)-0.36\cdot \cos (30.6))

a=9.8\times 0.199

a=1.95 m/s^2          

6 0
3 years ago
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