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statuscvo [17]
4 years ago
6

The plane flight covers 400 miles in the first hour. As you approach the landing site, it takes you an hour to cover the last 20

0 miles. This is an example of (2 points) positive acceleration. velocity. instantaneous speed. negative acceleration.
Physics
2 answers:
Aleks04 [339]4 years ago
5 0

Answer:

negative acceleration

Explanation:

Acceleration is defined as the rate of change in velocity to the time taken.

Acceleration is positive if the final velocity is ore than the initial velocity.

Acceleration is negative if the final velocity is less than the initial velocity.

Here, the velocity of plane is decreasing because it is landing, so the acceleration is negative.

9966 [12]4 years ago
3 0
Miles per hour is velocity so I agree with you. Without seeing any associated question, though, it's hard to say. If the question is, find the average velocity, then velocity is correct. But since change in velocity is negative, that is also negative acceleration.
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Explanation:

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Now for the voltage we will use V = 110 [V], for resistance R = 10 [ohms]

Replacing the values we have:

I = \frac{V}{R} \\\\I = \frac{110}{10}\\I= 11 [amp]

Now let's double the voltage 220 [V]:

I = \frac{220}{10} \\I = 22 [amp]\\

Therefore the current will be increased.

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I=\frac{110}{20}\\I = 5.5 [amp]

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When an electron jumps to or from one energy level to another energy level, spectral lines are produced. The range of spectral lines depends on the number of energy levels available to which the electron can jump. This depends the amount of energy gained/lost by the electron.

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The magnitude of the average force exerted on the ball by the wall is calculated below.

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To calculate:

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We know;

F=(m×v)÷t

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