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sweet [91]
3 years ago
9

What is the speed of a jet plane that flies 7200 km in 9 hours (in km/hr)?

Physics
1 answer:
e-lub [12.9K]3 years ago
8 0

Explanation:

800 km per her because you have to divide 7200 by 9

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Elan Coil [88]

Answer:

Explanation:

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X-direction                                     | Y-direction

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3 years ago
What happens to a light ray passing through the center of a lens?
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Theoretically, the light ray will not change direction. The center of a lens is called the optical center. If the ray of light hits the lens even just a little bit off center, the light ray is refracted. Refraction happens when the incident and exit angles of the ray are different. The optical center is guaranteed to not have any difference in angle, which allows the light ray to pass through directly without changing direction.
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The kinetic theory states that the higher the temperature, the faster the
max2010maxim [7]

Answer: the higher the kinetic energy

Explanation:

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3 years ago
A simple pendulum consists of a point mass suspended by a weightless, rigid wire in a uniform gravitation field. Check all that
9966 [12]

Answer:

f.The period is independent of the suspended mass.

Explanation:

The period of a pendulum is given by

T=2 \pi \sqrt{\frac{L}{g}}

where

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g is the acceleration due to gravity

From the formula, we see that:

1) the period of the pendulum depends only on its length, L, and it is proportional to the square root of the length

2) the period does not depend neither on the mass of the pendulum, nor on its amplitude of oscillation

So, the only correct statements are

f.The period is independent of the suspended mass.

Note: statement "e.The period is proportional to the length of the wire" is also wrong, because the period is NOT proportional to the length of the wire, but it is proportional to the square root of it.

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3 years ago
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Answer: 1.67 x 10^-7N

Explanation:

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