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Leona [35]
3 years ago
7

The diagram below shows a light ray striking a plane mirror surface at an angle of 40° to the normal.

Physics
1 answer:
weeeeeb [17]3 years ago
5 0

Answer:

we need to see all of the options

Explanation:

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According to the Law of Reflection, the angle of incidence
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A

Explanation:

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while performing a sonogram, to minimize risk to the fetus, which imaging mode trade off would be most appiclable.
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4 years ago
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4 years ago
Read 2 more answers
At what height above the ground must a mass of 10 kg be to have a potential energy equal in value to the kinetic energy possesse
Paladinen [302]

Answer:

20 m

Explanation:

We'll begin by calculating the kinetic energy of the mass. This can be obtained as follow:

Mass (m) = 10 kg

Velocity (v) = 20 m/s

Kinetic energy (KE) =?

KE = ½mv²

KE = ½ × 10 × 20²

KE = 5 × 400

KE = 2000 J

Finally, we shall the height to which the mass must be located in order to have potential energy that is the same as the kinetic energy. This can be obtained as follow:

Mass (m) = 10 kg

Acceleration due to gravity (g) = 10 m/s²

Potential energy (PE) = Kinetic energy (KE) = 2000 J

Height (h) =..?

PE = mgh

2000 = 10 × 10 × h

2000 = 100 × h

Divide both side by 100

h = 2000 / 100

h = 20 m

Thus, the object must be located at a height of 20 m in order to have potential energy that is the same as the kinetic energy.

5 0
3 years ago
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