Answer:
Ray A = Incidence ray
Ray B = Reflected ray
Explanation:
From the law of reflection,
Normal: This is the line that makes an angle of 90° with the reflecting surface.
Ray A is the incidence ray: This is the ray that srikes the surface of a reflecting surface. The angle formed between the normal and the incidence ray is called the incidence angle
Ray B is the reflected ray: This is the ray leaves the surface of a reflecting surface. The angle formed between the reflected ray and the normal is called reflected angle
Answer:
(b) a hydrogen atom
Explanation:
Wavelength is inversely proportional to energy. So we have to find the system for which the second photon has smaller energy than the first one.
For the harmonic oscillator, the energy level spacing remains the same as the quantum number increases.
For the hydrogen atom, the energy level spacing decreases as the quantum number increases.
For the particle in a box, the energy level spacing increases as the quantum number increases.
The rate of energy radiated by the man is 3.86 x 
J/s. 
.
The amount of energy radiated by an object majorly depends on the area of its surface and its temperature. The is well explained in the Stefan-Boltzmann's law which states that:
Q(t) = Aeσ
where: Q is the quantity of heat radiated, A is the surface area of the object, e is the emmisivity of the object, σ is the Stefan-Boltzmann constant and T is the temperature of the object.
To determine the rate of energy radiated by the man in the given question;
= Aeσ
But A = 1.7 m², e = 0.4 and σ = 5.67 x J/s.
So that;
= 1.7 * 0.4 * 5.67 x
= 3.8556 x
= 3.86 x J/s.
Thus, the rate of energy radiated by the man is 3.86 x J/s. .
Learn more on energy radiation of objects by visiting: brainly.com/question/12550129
Answer:
-3.2 ×1.6 ×10^-19C
Explanation:
Number of proton = 6
Number of electron = 8
To determine the quantity of the charge, we would first find the difference between the number of
protons and electrons. Then multiply the difference by charge 1.6 x 10 -19 C to determine the charge on the object.
Difference between proton and electron is elementary charge
Elementary charge = proton - electron
= 6 - 8
Elementary charge = -2e
Recall, charge (q) = 1.6 ×10^-19C
1e = 1.6 ×10^-19C
Magnitude of the charge of object = -2× (1.6 ×10^-19C)
Magnitude of the charge of object = -3.2 ×1.6 ×10^-19C
Rock climbing. Free diving. Sky diving. Dog sledding.
