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Anit [1.1K]
2 years ago
5

A rocket sled accelerates from 10 m/s to 40 m/s in 2 seconds. What is the average acceleration of the sled?

Physics
1 answer:
Dafna11 [192]2 years ago
6 0

Answer:

15m/s²

Explanation:

Given parameters:

Initial velocity  = 10m/s

Final velocity  = 40m/s

Time taken  = 2s

Unknown:

Average acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time;

 Acceleration  = \frac{Final velocity   -  Initial velocity }{time}  

  Acceleration = \frac{40 - 10}{2}    = 15m/s²

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Answer:

20 Hz

15.8 times

Explanation:

A

Although the range of frequency for any human's ear is usually said to be between 20 Hz and 20 kHz. And since the question asked for the least intense frequency, that has to be 20 Hz. Essentially the frequency most people perceive the least intense sound is 20 Hz.

B

A 100-Hz sound must be 10^1.2 times or 15.8 times more intense compared to a 1000-Hz sound to be perceived as equal to 60 phons of loudness

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3 years ago
A juggler throws a bowling pin straight up in the air. After the pin leaves his hand and while it is in the air, which statement
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Answer:

The velocity of the pin is opposite its acceleration on the way up.

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3 years ago
while standing on the sidewalk facing the road, you see a bicyclist passing by toward your right. in the reference frame of the
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Answer:

Consider frames X and Y:

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7 0
3 years ago
In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has
irinina [24]

Answer:

 Coil 2 have  235  loops

Explanation:

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Let

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Therefore, the coil 2 has  n ₂= 235  loops.

4 0
3 years ago
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Vera_Pavlovna [14]

Answer:

b

Explanation:

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