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3 years ago

What is an incident wave,and a normal

Physics

1 answer:

Dafna1 [17]3 years ago

5 0

Answer:

An incident wave is a current or voltage wave that travels through a transmission line from the generating source towards the load. It becomes incident when it arrives at a discontinuity or another medium with different propagation characteristics. Wave normal. A unit vector which is perpendicular to an Equiphase surface of a wave, and has its positive direction on the same side of the surface as the direction of propagation.

Explanation:

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Which best explains how a heat pump can heat a room?

marin [14]

Answer:

Cold air from the house is moved through pipes, where it absorbs thermal energy.

Explanation:

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3 years ago

Read 2 more answers

The block in the diagram below is AT REST. However, the tension in the cable is not the only thing holding the block back. Stati

Vedmedyk [2.9K]

Answer:

The tension in the rope is 229.37 N.

Explanation:

Given:

Mass of the block is, $m=33.2\ kg$

Coefficient of static friction is, $\mu = 0.214$

Angle of inclination is, $\theta = 31.5$ °

Draw a free body diagram of the block.

From the free body diagram, consider the forces in the vertical direction perpendicular to inclined plane.

Forces acting are $mg\cos \theta$ and normal $N$ . Now, there is no motion in the direction perpendicular to the inclined plane. So,

$N=mg\cos \theta\\N=(33.2)(9.8)\cos (31.5)\\N=277.415\ N$

Consider the direction along the inclined plane.

The forces acting along the plane are $mg\sin \theta$ and frictional force, $f$ , down the plane and tension, $T$ , up the plane.

Now, as the block is at rest, so net force along the plane is also zero.

$T=mg\sin \theta+f\\T=mg\sin \theta +\mu N\\T= (33.2)(9.8)(\sin (31.5)+(0.214\times 277.415)\\T= 170+59.37\\T=229.37\ N$

Therefore, the tension in the rope is 229.37 N.

3 0

3 years ago

Hello please help i’ll give brainliest

Alja [10]

Answer:

First answer.

Explanation:

There may be a 5N force, but if the frictional force also equals 5N, than they cancel eachother out, resulting in the brick still staying still, as it is resting on a (perfectly) level surface, but any amount of force would make the brick move.

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3 years ago

What happens at the end of a star's life? How bright is this process?

leonid [27]

Answer:

the star collapses and the outer layers explode as a 'supernova'.

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3 years ago

Which statement best describes what happens when people declare bankruptcy?

Gala2k [10]

Answer:

I believe that the answer is 4

Explanation:

When someone is bankrupt they agree not to take on more debt, Once your debt is discharged, your creditors cannot contact you or attempt to collect the debt in any way.

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2 years ago