Answer:
the charge the photoelectric effect induce is 0.132 × 10⁻¹¹ C
Explanation:
energy of ultraviolet light = ![\dfrac{hc}{\lambda}](https://tex.z-dn.net/?f=%5Cdfrac%7Bhc%7D%7B%5Clambda%7D)
= ![\dfrac{6.626 \times 10^{-34}\times 3 \times 10^8}{251\times 10^{-9}}](https://tex.z-dn.net/?f=%5Cdfrac%7B6.626%20%5Ctimes%2010%5E%7B-34%7D%5Ctimes%203%20%5Ctimes%2010%5E8%7D%7B251%5Ctimes%2010%5E%7B-9%7D%7D)
=7.91 × 10⁻¹⁹ J
=4.94 e V
energy released by the electron = 4.94 - 4.70
= 0.24 e V
potential at the surface of sphere =![\dfrac{K Q}{r}](https://tex.z-dn.net/?f=%5Cdfrac%7BK%20Q%7D%7Br%7D)
0.24 = ![\dfrac{9\times 10^9\times Q}{0.0495}](https://tex.z-dn.net/?f=%5Cdfrac%7B9%5Ctimes%2010%5E9%5Ctimes%20Q%7D%7B0.0495%7D)
Q = 0.132 × 10⁻¹¹ C
hence, the charge the photoelectric effect induce is 0.132 × 10⁻¹¹ C
1.6764 meters. You can also google inches to meters for your answer.
hope this helps
Answer:
If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person.
(a) The work done in moving the crate along the floor is 7,050 J.
(b) The work done in moving the crate vertically is 0 J.
<h3>
Work done in moving the crate horizontally</h3>
W = Fdcosθ
where;
- F is total force to be applied
- d is displacement of the crate
- θ is the horizontal angle = 0
W = (1100 + 310) x 5
W = 7,050 J
<h3>
Work done in moving the crate vertically</h3>
W = Fd cos(90)
W = 0
Thus, the work done in moving the crate along the floor is 7,050 J.
the work done in moving the crate vertically is 0 J.
Learn more about work done here: brainly.com/question/8119756
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Answer:Radioactive
Explanation:
The radioactive nucleus is the one which does not has enough binding energy to hold the nucleus in a stable state and thus radiates either electron or proton to become a stable element.
A radioactive element is formed when after billions of years such as uranium and thorium. The stability of the nucleus depends upon the opposition of attractive and repulsive force among the nucleus.