Answer: Protons give the nucleus a positive charge.
Explanation:
Protons - Gives of positive charge
Neutrons - Gives of neutral charge (No charge)
Electrons - Gives off negitive charge
Answer:
option B
Explanation:
given,
spring constant (k ) = 45 N/m
distance of the spring = 0.8 m
Magnitude of the force to handle grip = ?
Magnitude of spring force =
F = k x
F = 45 x 0.8
F = 36 N
The magnitude of spring force is equal to F = 36 N
The correct answer is option B
To solve this problem we will apply the conventions related to the cinematic movement theorem, for which the kinematic equations of linear motion are equally detached. We will use the speed and position equations to determine the general formula according to the given values.
To velocity function we have
Our values are,
Replacing at this equation and solving we have that the equation for the velocity would be,
Therefore the velocity function is
At the same time for the position function:
Replacing we have that
Therefore the position function is
Answer:
1. The frequency of the incident light must be equal to or greater than the threshold frequency of the photons before emission could take place.
2. The intensity of the incident light is proportional to the amount of photons released. The higher the intensity of light, the greater the amount of photons ejected.
Explanation:
1. Photoelectric effect is the process by which light with sufficient frequency falls on the surface of a material, e.g metal, to emit electrons. The incident light must have a minimum value of required frequency for the electrons to be ejected. This energy is termed work function which is a function of frequency.
So for emission to take place, the frequency of the incident light must be equal to or greater than the threshold frequency of the photons.
2. The intensity of light is a measure of the amount of light per unit area. When the intensity of incident light increases, the probability that photons would be released increases. The intensity of the incident light is proportional to the amount of photons released.