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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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Answer:

Part a)

M = 2.31 \times 10^{30} kg

Part b)

M = 1.15 M_s

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Part a)

As we know that the period of revolution of the planet is given by

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Part b)

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6 0
4 years ago
Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelen
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Answer:

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B) 0.08m

C) 0.64m

Explanation:

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A) for the first laser you use:

y_1=\frac{(1)(d/20)(4.80m)}{d}=0.24m\\

for the second laser:

y_2=\frac{(1)(d/15)(4.80m)}{d}=0.32m

hence, the first maximum of the first laser is closer to the central maximum.

B) The difference between the first maximum:

\Delta y=y_2-y_1=0.32m-0.24m=0.08m=8cm

hence, the distance between the first maximum is 0.08m

C) you calculate the second maximum of laser 1:

y_{m=2}=\frac{(2)(d/20)(4.80m)}{d}=0.48m

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1.12m-0.48m=0.64m

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