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Nata [24]
3 years ago
6

Why is it important that all scientists use the metric system?.

Physics
1 answer:
svetoff [14.1K]3 years ago
5 0
It is very important that all scientists use the metric system because it is universal - America is the only country that doesn't use the metric system, whereas in the rest of the world, metric system is used. So as not to confuse numbers and do something incorrectly, it is better to use metric system instead. 
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A 65-kg ice skater stands facing a wall with his arms bent and then pushes away from the wall by straightening his arms. At the
Marrrta [24]

Our values can be defined like this,

m = 65kg

v = 3.5m / s

d = 0.55m

The problem can be solved for part A, through the Work Theorem that says the following,

W = \Delta KE

Where

KE = Kinetic energy,

Given things like that and replacing we have that the work is given by

W = Fd

and kinetic energy by

\frac {1} {2} mv ^ 2

So,

Fd = \frac {1} {2} m ^ 2

Clearing F,

F = \frac {mv ^ 2} {2d}

Replacing the values

F = \frac {(65) (3.5)} {2 * 0.55}

F = 723.9N

B) The work done by the wall is zero since there was no displacement of the wall, that is d = 0.

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3 years ago
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zhannawk [14.2K]

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7 0
3 years ago
An observer sees a full moon in the night sky. What will the Moon's phase be 10 days later?
algol [13]
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5 0
3 years ago
How much heat is needed to vaporize 10.00 grams of water at 100.0°C? The latent heat of vaporization of water is 2,259 J/g
Nata [24]

Answer:

Heat of vaporization will be 22.59 j    

Explanation:

We have given mass m = 10 gram

And heat of vaporization L = 2.259 J/gram

We have to find the heat required to vaporize 10 gram mass

We know that heat of vaporization is given by Q=mL, here m is mass and L is latent heat of vaporization.

So heat of vaporization Q will be = 10×2.259 = 22.59 J

8 0
3 years ago
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