- What is meant by Stefan’s constant?
- What is the dimensional formula for work?
- What is the dimensional formula of frequency?
- What is r in PV NRT?
- What is dimension of G?
- What is the dimensional formula of Stefan’s constant?
- What is the dimension of Boltzmann constant?
- What is the dimension of gas constant?
- What is the dimensional formula of stress?
- Are angles dimensionless?
- What is SI unit of stress?
- What is K in Boltzmann’s formula?

## What is meant by Stefan’s constant?

The Stefan–Boltzmann constant (also Stefan’s constant), a physical constant denoted by the Greek letter σ (sigma), is the constant of proportionality in the Stefan–Boltzmann law: “the total intensity radiated over all wavelengths increases as the temperature increases”, of a black body which is proportional to the ….

## What is the dimensional formula for work?

Work (physics)WorkOther unitsFoot-pound, ErgIn SI base units1 kg⋅m2⋅s−2Derivations from other quantitiesW = F ⋅ s W = τ θDimensionM L2 T−23 more rows

## What is the dimensional formula of frequency?

Frequency is measured in units of hertz (Hz) which is equal to one occurrence of a repeating event per second. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency….FrequencyCommon symbolsf, νSI unitHzIn SI base unitss−1Dimension

## What is r in PV NRT?

PV. nR. P = Pressure (atm) V = Volume (L) n = moles R = gas constant = 0.0821 atm•L/mol•K T = Temperature (Kelvin) The correct units are essential. Be sure to convert whatever units you start with into the appropriate units when using the ideal gas law.

## What is dimension of G?

G (gravitational Acceleration) (g) has a dimension of LT-2 where L is length, and T is time. It can be converted to the corresponding standard SI unit m/s2 by multiplying its value by a factor of 9.80665.

## What is the dimensional formula of Stefan’s constant?

The total energy E emitted by a unit area of a black body per second is given by E=σT4 where T is the absolute temperature of the body and σ is a constant known as Stefan’s constant. If the body is not a perfect black body, then E=εσT4where ε is the emissivity of the body.

## What is the dimension of Boltzmann constant?

Dimension Formula of Boltzmann Constant R is the universal gas constant, whose value is 8.314 J/K-mol, and its dimensional formula is [M1L2T−2K−1].

## What is the dimension of gas constant?

The dimensions of the universal gas constant R are energy per degree per mole. In the metre-kilogram-second system, the value of R is 8.3144598 joules per kelvin (K) per mole.

## What is the dimensional formula of stress?

Therefore, stress is dimensionally represented as [M1 L-1 T-2].

## Are angles dimensionless?

Angles measured in radians are considered to be dimensionless because the radian measure of angles is defined as the ratio of two lengths θ=sr (where s is some arc measuring s-units in length, and r is the radius) however the degree measure is not defined in this way and it is said to be dimensionless too.

## What is SI unit of stress?

The SI unit of stress is the pascal (Pa). When one newton of force presses on a unit surface area of one meter squared, the resulting stress is one pascal: onepascal=1.0Pa=1.0N1.0m2.

## What is K in Boltzmann’s formula?

where kB is the Boltzmann constant (also written as simply k) and equal to 1.38065 × 10−23 J/K. In short, the Boltzmann formula shows the relationship between entropy and the number of ways the atoms or molecules of a thermodynamic system can be arranged.