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Marianna [84]
2 years ago
11

I have no clue how to do this at all

Physics
1 answer:
Daniel [21]2 years ago
6 0

Answer:

Below

Explanation:

There are 2 sig figs in 120000. They are the 1 and 2.

Zeros at the end of a whole number are NOT considered significant. And since there are no decimals that come before the trailing zeros they are not significant.

Hope this helps!

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What is the tangential velocity of a record player which makes 11 revolutions in 20 seconds?
slava [35]

Answer:

The tangential velocity of a rotating object is:

v = r*w

where r is the radius, and w is the angular velocity.

w = 2*pi*f

where f is the frequency.

We know that the record plater does 11 revolutions in 20 seconds, then it does:

11 rev/20s = 0.55 rev/s = f

then we have:

w = 2*pi*0.55 s^-1 = 2*3.14*0.55 s^-1 = 3.454 s^-1

The radius of a record player is really variable, it is around 10 inches, so i will use r = 10in, which is the rotating part of the record player.

then the tangential velocity is:

v = 10in*3.454 s^-1 = 34.54 in/s

7 0
3 years ago
How much time is required for 48.96 C of charge to move through an electric juicer if the current through the juicer is 1.39 A?
OleMash [197]
The relationship between the charge flowing through a conductor, the current flowing through the conductor and the time is:
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3 years ago
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nataly862011 [7]

Answer:

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