4 years ago

How do you label acceleration, momentum, speed, force, and velocity?

1 answer:

3 0

I have a a work sheet to do and i have choices for the diffrent words,
A:m 
B:s 
C:m/s 
D:m/s2 
E:kg 
F:kg m/s 
G:N 
H:m/s north 
so can you help me match the words with there answers

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Soft ball,kick ball,wiffle ball??

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Two iron weights, one twice the mass of the other, are dropped from the top of a building. Compared with the lighter weight, the

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4 years ago

By what factor must the amplitude of a sound wave be decreased in order to decrease the intensity by a factor of 3?

s344n2d4d5 [400]

Answer:

Amplitude is decreased by a factor of $\sqrt3$ if intensity is decreased by a factor of 3.

Explanation:

Intensity of a sound wave is directly proportional to the square of its amplitude.

Therefore, if intensity is $I$ and amplitude is $A$ , then

$I=kA^2$ , where, $k$ is constant of proportionality.

Now, if intensity of sound wave is decreased by a factor of 3. So,

New intensity is, $I_{new}=\frac{I}{3}$

$I_{new}=kA_{new}^2\\\frac{I}{3}=kA_{new}^2$

Plug in $kA^2$ for $I$ . This gives,

$\frac{kA^2}{3}=kA_{new}^2\\A_{new}^2=\frac{A^2}{3}\\A_{new}=\sqrt{\frac{A^2}{3}}=\frac{A}{\sqrt{3}}$

Therefore, amplitude is decreased by a factor of $\sqrt3$ .

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3 years ago

in a cricket match there are 5000 spectators counted 10 by 10 the number of significant figure in the measurement will be

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Answer:

$\boxed{3 \ Significant \ figures}$

Explanation:

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3 years ago