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AveGali [126]
3 years ago
5

The electromagnetic spectrum is divided into regions by Group of answer choices a.wavelengths and frequencies b.the way they are

used c.speed d.colors
Physics
1 answer:
MrMuchimi3 years ago
6 0

Answer:

Generally, by wavelengths and frequencies.

Colors only occur for a narrow portion of the spectrum.

The speed for these waves is c the speed of light regardless of wavelength.

The way they are used seems somewhat irrelevant.

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A box moves to the right along a rough, wooden surface. In which direction does the box experience a frictional force?
emmasim [6.3K]

Answer:

To the left, in the opposite direction of the object's motion.

Explanation:

This is because friction always apposes motion, and will act to stop motion.

To stop the box, friction would have to act in the left direction.

5 0
3 years ago
Two identical objects (A, B) travel circles of the same radius, but object A completes three times as many rotations as object B
malfutka [58]

Answer:

a) One-ninth the force acting on object A.

Explanation:

First, we derive an expression for the centripetal force acting on both objects.

For object A, centripetal force is:

F_A = \frac{m{v_A}^2}{r}

For object B, centripetal force is:

F_B = \frac{m{v_B}^2}{r}

We are given that they have the same mass and they move in circles of the same radius.

If object A completes three times as many rotations as object B, then, object must have 3 times the speed of object B.

Hence:

{v_A} = 3*{v_B}

Therefore, F_A becomes:

F_A = \frac{m({3*v_B}^{2} )}{r}\\\\\\F_A = \frac{9m{v_B}^{2}}{r}

F_A = 9F_B

=> F_B = \frac{1}{9} F_A

Therefore, the net centripetal force acting on object B is one-ninth of the force acting on object A.

4 0
3 years ago
If there is an unusually windy month one might anticipate a. Higher tides b.increased wave size c. Unpredictable currents d. Low
Luden [163]
I belive it is b. increased wave size
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How would you describe the pattern shown in graph a?
const2013 [10]
That it is going up and that is typically called positive
8 0
4 years ago
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eimsori [14]
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3 years ago
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