Answer: 1. B. The number of electrons emitted from the metal per second increases.
2. The maximum speed of the emitted electrons increases.
The stopping potential increases
Explanation:
Photoelectric effect is simply referred to as the emission of electrons that occurs when there's an electromagnetic radiation. An example of such electromagnetic radiation is when material is being hit by light.
Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, the number of electrons emitted from the metal per second increases if the intensity of the incident light is increased.
Also, if the initial light incident on the metal surface causes electrons to be ejected from the metal, the maximum speed of the emitted electrons increases and the stopping potential increases.
Answer:
5115.2 J
Explanation:
Work: This can be defined as product of force and distance. The S.I unit of work is Joules (J).
From the question,
The expression for work is given as
W = F×d................. Equation 1
Where W = Work done by team A, F = Force applied by team A, d = distance moved by team B.
Given: F = 1390 N, d = 3.68 m
Substitute into equation 1
W = 1390×3.68
W = 5115.2 J.
Hence the work done by team A in pulling team B = 5115.2 J
Answer:
Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. The ground state of an atom is the lowest energy state of the atom.
Using q=1.60217662 E-19 C we get:
Then using 9.10938356E-31 kg as the mass, we get
It means that 19.3g of gold is packed into 1cm^3.
