The earth’s orbit is oval in shape . Explain how the magnitude of gravitational force between earth and sun changes as earth mov
es from position P to Q as shown in the figure.
1 answer:
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Answer:
1.5cm
Explanation:
The place where the bead will come to rest is the place where the force between the left charge and the bead is the same, but in opposite direction, as he force between the right charge and the bead.
Also:
So, we replace and simplify. Notice that the charges and the Coulomb constant will cancel:
But the only solution that would place the bead on the wire is 0.015m or 1.5cm, so this is our answer.
The half-life observed by an observer at rest is 1.25 s
Explanation:
In this problem, the particle is travelling at a significant fraction of the speed of light: therefore, we have to consider the phenomenon of the time dilation. The half-life of the particle as measured by an observer at rest is given by
where
is the proper half-life of the particle
v is the speed of the particle
c is the speed of light
For the particle in this problem,
Substituting into the equation, we find:
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