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nikdorinn [45]
3 years ago
8

Which is measured by the power of a machine?

Physics
1 answer:
Alina [70]3 years ago
7 0

the rate of work done or doing work is usually measured by the power of a machine .

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If the magnitude of the electric field at a distance of 7.8 cm from the center is 30500 n/c , what is the magnitude of the elect
Romashka-Z-Leto [24]
<span>3730 N/C The intensity of the electric field follows the inverse square law. Since everything except the distance is remaining constant, then the force will vary with the inverse square of the ratio of the change. So first, lets calculate the ratio of the change in distance. 22.3 / 7.8 = 2.858974359 And since we actually want the square of the distance... 2.858974359^2 = 8.173734385 And since the distance increased, that means the force will decrease. So we get 30500 / 8.173734385 = 3731.464538 Rounding to 3 significant figures gives 3730 N/C.</span>
4 0
4 years ago
Give reason standard physical quantity is used for correct measurement of the given body​
PtichkaEL [24]

Answer:

Physical quantities are the substances which can be measured. By measuring physical quantities, we can measure the mass, weight and other physical properties

4 0
3 years ago
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We triple the mass of the object
amid [387]
What? What is being asked?
7 0
4 years ago
Why is lightning so short?
miv72 [106K]
Electricity moves so quickly that it can only be there for so long.
8 0
3 years ago
The aurora is caused when electrons and protons, moving in the earth's magnetic field of ≈5.0×10−5T, collide with molecules of t
Vika [28.1K]

Answer:

r=0.341m

Explanation:

The circular movement is produced by the magnetic field:

F=q*v*B

This force is a centripetal force because the electron moves in a plane perpendicular to the magnetic field. For a centripetal Force, that produces a circular orbit with a radius r:

F=m*a=m*v^{2}/r

If we solve these two equations in order to find r, with the mass and charge of a electron:

qvB=mv^{2}/r\\r=mv/(qB)=9,1*10^{-31}*3*10^{6}/(1.6*10^{-19}*5*10^{-5})=0.341m

3 0
3 years ago
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