Physics Questions and Answers

elastic potential energy[Ee] = \(\frac{1}{2} ke^2\).

The vapor pressure of any substance increases non-linearly with temperature, often described by the Clausius–Clapeyron relation.

As the temperature of a liquid or solid increases its vapor pressure also increases.

Conversely, vapor pressure decreases as the temperature decreases. 

i.e. vapor pressure is directly proportional to temperature

The electric field at the surface of the conductor is perpendicular to the surface.

Charge accumulates, and the field is strongest, on pointy parts of the conductor.

Energy = power x time

Power = voltage x current. 

Energy = voltage x current x time

Energy = 40 x 0.5 x 60 x 2

→ 2,400j

The model, called the kinetic theory of gases, assumes that the molecules are very small relative to the distance between molecules.

The molecules are in constant, random motion and frequently collide with each other and with the walls of any container.

Relays are electrically operated switches that open and close the circuits by receiving electrical signals from outside sources.

Therefore, as the area of the plates increase, capacitance increases.

v = f λ to calculate the wave's velocity.

v = 312 x 1.10

= 343.2m/s

The refractive index of water is greater than that of air.

So, A person legs appear to be short while standing in the tank due to refraction.

The primary colors of pigment are red, blue, and green.

Mixing these primary colors of pigment gives us the three secondary colors: 

red+blue=magenta, red+ green = yellow, and blue + green = cyan