Recent questions tagged nature of physical world and measurement

+3 votes

1 answer

Deduce dimensional formula of— (i) Boltzmann’* constant (ii) mechanical equivalent of heat.

asked Apr 6, 2019 in Class 12 by kratos

+2 votes

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If c, the velocity of light, g the acceleration due to gravity and P the atmospheric pressure be the fundamental quantities in MKS system,

asked Apr 5, 2019 in JEE by kratos

+3 votes

1 answer

If x = at + bt^2 where x is in meters and t is in seconds. What are the

asked Apr 5, 2019 in Class 11 by kratos

+3 votes

1 answer

If surface tension (*), Moment of Inertia (I) and Plank'* constant (h), were to be taken as the fundamental units, the dimensional formula

asked Apr 4, 2019 in JEE by kratos

+2 votes

1 answer

The dimensions of Stefan-Boltzmann constant σ can be written in terms of Planck'* constant h, Boltzmann constant kB and the speed of light c as

asked Apr 3, 2019 in Physics by kratos

+2 votes

1 answer

The mass of a box measured by a grocer'* balance is 2.3 kg. Two gold pieces of masses 20.15 g and 20.17 g

asked Mar 26, 2019 in Class 11 by kratos

+1 vote

1 answer

The % of ‘K’ in Extracellular fluid is about (A) 1% (B) 2 to 3%

asked Mar 23, 2019 in JEE by kratos

+3 votes

1 answer

The percentage error in the mass and speed are 2% and 3% respectively. What is th

asked Mar 20, 2019 in Class 12 by kratos

+2 votes

1 answer

What is understood by unification and reduction in physics?

asked Mar 19, 2019 in Class 11 by kratos

+1 vote

1 answer

Quantity R/NA defines A. Plank'* constant B. Boltzmann constant C. gravitational constant

asked Mar 19, 2019 in Class 11 by kratos

+1 vote

1 answer

Given that Y = a sin ωt + bt + ct^2 cos ωt. The unit of abc is same as that of

asked Mar 18, 2019 in Class 11 by kratos

+2 votes

1 answer

If value of gravitational constant in MKS is 6.67 x 10^-11 Nm^2/kg^2 then value of G in CGS = .........

asked Mar 15, 2019 in JEE by kratos

+2 votes

1 answer

Assertion : Specific gravity of a fluid is a dimensionless quantity.

asked Mar 14, 2019 in Class 11 by kratos

+1 vote

1 answer

Write Vander Walls equation for one mole of a gas and name any two terms in it.

asked Mar 12, 2019 in JEE by kratos

+1 vote

1 answer

A calorie is a unit of heat or energy and it equals about 4.2 J where 1J = 1 kg m^2s^–2.

asked Mar 7, 2019 in Class 11 by kratos

+2 votes

1 answer

One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What is the ratio

asked Mar 2, 2019 in Class 11 by kratos

+1 vote

1 answer

The escape velocity v of a body depends on 1. the acceleration due to gravity ‘g’ and 2. the radius of planet ‘R’

asked Mar 2, 2019 in JEE by kratos

+1 vote

1 answer

The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes

asked Feb 28, 2019 in Class 11 by kratos

+3 votes

1 answer

Define Acoustics. Give its three subtitles.

asked Feb 26, 2019 in Class 11 by kratos

+3 votes

1 answer

The time ****** for the oscillating system (see fig.) is

asked Feb 24, 2019 in Class 12 by kratos

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