Answer:
Explanation:
We know that , If the frictional force on a system is zero , then the total energy of a system will be conserved.
By using energy conservation
KE₁ + U₁ = KE₂ + U₂
KE₁=Kinetic energy at location 1
U₁ =Potential energy at location 1
KE₂=Kinetic energy at location 2
U₂=Potential energy at location 2
Therefore, Raymond is thinking in a right way.
Answer:
option D
Explanation:
The correct choice of Gaussian surface would be (D) a finite closed cylinder whose axis coincides with the axis of the rod and whose cross-section has a radius of . This is because the charged cylinder is of <em>infinite length</em> and hence there won't be any electric flux coming out of the top and bottom flat surfaces.
Now, to find out the magnitude of the electric field , we shall have to apply Gauss's law,
or, ( being the height of the Gaussian cylinder)
or,
It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. What astronomers mean when <span> they say that the sun makes energy by hydrogen burning is that, the Sun is fusing hydrogen into helium and releasing energy. Hope this helps.</span>
The magnitude and sign of the charge are 0.8 MC and negative respectively.
To find the answer, we need to know about the electric potential of a point charge.
<h3>What's the mathematical expression of the electric potential of a point charge?</h3>
- Mathematically, the electric potential at a distance 'r' from a point charge 'q' is given as (Kq)/r.
- K is the electrical constant with value 9×10^(-9) in vaccum.
<h3>What will be the magnitude and sign of a charge, if potential is -3.50V at 2mm?</h3>
From the expression of electric potential, charge is
q= (potential ×r)/K
= (-3.5×0.002)/ (9×10^(-9))
= -0.8 mega coulomb.
Thus, we can conclude that the magnitude and sign of the charge are 0.8 MC and negative respectively.
Learn more about the electric potential here:
brainly.com/question/14306881
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Answer:
The final velocity is -49.05 meters per second.
Explanation:
Let's use an equation of constant acceleration:
Where a is the acceleration and g is the acceleration caused by gravity.
Since the object is being dropped from rest, .
We're looking for the speed after 5 seconds, so .
So the final velocity is -49.05 meters per second.