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Scorpion4ik [409]
3 years ago
9

How are speed and velocity different?

Physics
2 answers:
liubo4ka [24]3 years ago
4 0

Velocity tells you how fast and in what direction. Speed only tells how fast.

dlinn [17]3 years ago
3 0

Velocity tells you how fast and gives a direction. Speed only tells how fast.

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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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3 years ago
What is the wavelength of a 100 mhz radio signal?
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You are asked to design a retroreflector using two mirrors that will reflect a laser beam by 180 degrees independent of the inci
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