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3 years ago

What can we say about energy on

Physics

1 answer:

Marina CMI [18]3 years ago

8 0

Answer:

A. Longer wavelengths and less dangers

Explanation:

Radio waves are at the lowest end of the EM spectrum, they have the longest wavelength of any other EM waves, the lowest energy and, accordingly, the lowest frequency;

Their low energy and frequency means they pose little risk of harm or danger as they don't get absorbed by human being.

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Question 6(Multiple Choice Worth 2 points)

nikklg [1K]

I believe the answer is the first one.

8 0

3 years ago

A plane is flying to Minnesota with a velocity of 277.73 km/h, N. The plane

umka2103 [35]

Answer:

466 km/h

255°

measured anticlockwise from the east direction

Explanation:

find the resultant velocity of a plane after a crosswind affects its motion. take the positive

x -direction as east, and the positive y -direction as north. The components of the plane's velocity (without wind) are

upx = 0
upy = 450 Km/ h

And for the wind.

uwx = - 120 Km/h
uwy = 0

The components for the resultant velocity of the plane are given by

ux =upx + uwx = 0 - 120 Km/h = - 120 Km/h

uy = upy + uwy = - 450 Km/h +0 = - 450 Km/h

The magnitude of the resultant velocity is

$\sqrt{(vx)^2+(vy)^2} =\sqrt{(-120lkm/h^2+(-450lkm/h)^2}$

= 466 km/h

Hope this helps u : )

7 0

1 year ago

Which of the following is true of alternating current? Select all that apply.

Nitella [24]

Answer:

The correct option is (C).

Explanation:

Electric current can be direct or alternating.

The direct current flows only in one direction. It is unidirectional.

The alternating current or an C current reverse its direction periodically.

So, the correct statement regarding the alternating current is (c) i.e. Electrons reverse direction periodically.

7 0

3 years ago

Thermal convection applies mainly to _________.

Basile [38]

the answer should be "fluids".

7 0

3 years ago

Read 2 more answers

Does a heavier object or a lighter object experience a greater gravitational force?

aalyn [17]

L l Aigabeera ya q alr mma grasvdade l aferza uatare ms al amtaeialr lgerio hcaieno q edse pese masth

5 0

3 years ago