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azamat
3 years ago
8

In classical mechanics there are three base dimensions. length is one of them. what are the other two? view available hint(s)

Physics
1 answer:
torisob [31]3 years ago
7 0
Other base dimensions are mass and time
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Calculate the elastic potential energy stored in a spring if it has a force constant of 150 N/m. the spring is extended to a len
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Answer:

6.75J

Explanation:

U=1/2KΔx²

U=0.5* 150*0.30^2

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A line _____ on a typical Speed vs. Time graph means an object is experiencing a constant acceleration.
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The answer should be C. slanted upward to the right.

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What is the base unit to measure volume
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Liter
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Professional Application: A 30,000-kg freight car is coasting at 0.850 m/s with negligible friction under a hopper that dumps 11
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0.182 m/s

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3 years ago
A ship 1200m off shore fires a gun. how long after the gun is fired will it be heard on the shore?​
ryzh [129]

Answer:

We know that the speed of sound is 343 m/s in air

we are also given the distance of the boat from the shore

From the provided data, we can easily find the time taken by the sound to reach the shore using the second equation of motion

s = ut + 1/2 at²

since the acceleration of sound is 0:

s = ut + 1/2 (0)t²

s = ut    <em>(here, u is the speed of sound , s is the distance travelled and t is the time taken)</em>

Replacing the variables in the equation with the values we know

1200 = 343 * t

t = 1200 / 343

t = 3.5 seconds (approx)

Therefore, the sound of the gun will be heard at the shore, 3.5 seconds after being fired

6 0
3 years ago
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