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Evgen [1.6K]
3 years ago
14

10 Select the correct answer. What property of a wave remains unchanged when a wave enters a different medium? O A amplitude OB.

frequency OC. wavelength OD. velocity O E. density Reset​
Physics
2 answers:
Mama L [17]3 years ago
8 0

a and b ik thats the awser becuse imjust did it

inna [77]3 years ago
3 0

Answer:

<h2>B frequency </h2>

Explanation:

if the frequency changes so does the energy and that doesn't happen to EM waves entering a medium by the conservation of energy

Correct me if im wrong but im 100% its B

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Hatshy [7]

Answer:

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Explanation:

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3 years ago
A 57-kg woman holds a 6-kg package as she stands within an elevator which briefly accelerates upward at a rate of 0.15g. Determi
Temka [501]

Answer:

R = 710.7N

L = 67.689 N

During gravity fall L = R = 0 N

Explanation:

So the acceleration that the elevator is acting on the woman (and the package) in order to result in a net acceleration of 0.15g is

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The force R that the elevator exerts on her feet would be product of acceleration and total mass (Newton's 2nd law):

a(m + M) = 1.15g(57 + 6) = 1.15*9.81*63 = 710.7N

The force L that she exerts on the package would be:

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When the system is falling, all have a net acceleration of g. So the acceleration that the elevator exerts on the woman (and the package) is 0, and so are the forces L and R.

7 0
3 years ago
Which of the following objects exerts a gravitational force?
kompoz [17]

the earth exerts a gravitational force

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Two factor that affect gravitational force​
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When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
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