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adell [148]
3 years ago
5

What is a normal force?

Physics
1 answer:
Flauer [41]3 years ago
3 0
Is the component perpendicular to the surface on contact  of the  contact force  <span />
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What is the change in potential energy if the distance separating the electron and proton is increased to 1.0 nm?
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Answer:

Ep=-2.3*10^{-19}J

Explanation:

The change in potential energy can be expressed as:

Ep=K.\frac{q1.q2}{r}

where K is a constant with a value of 9*10^{9}\frac{N.m^{2}}{C^{2}}, q1 and q2 are the charges of the proton and the electron and r is the distance between them.

The charge for the proton is +1.6*10^{-19}C and the charge for the electron is -1.6*10^{-19}C.

Converting r=1.0nm to m:

1.0nm*\frac{1*10^{-9}m}{1.0nm}=1*10^{-9}m

Replacing values:

Ep=9*10^{9}\frac{N.m^{2}}{C^{2}}.\frac{(+1.6*10^{-19}C).(-1.6*10^{-19}C)}{1*10^{-9}m}

Ep=-2.3*10^{-19}J

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The generation of a magnetic field by an electric current is _electromagnetism_.

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A motorcycle and its driver has a mass of 145 kg. Answer the following questions about it, using correct units.
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4 years ago
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