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1 unified atomic mass unit is equal to.

1 unified atomic mass unit is equal to 1/12 of the mass of carbon-12 [12C6] isotope.... View Article

Which is the most accurate atomic clock?

Caesium atom clock is used as standard clock for measuring time.... View Article

Relative error in Z, given that Z = 1/A² is________

Answer: The relative error is defined as the ratio of the absolute error of the measurement to the actual measurement. If the true measurement... View Article

The error in two readings of A are 0.01 and -0.03, then mean absolute error is ?

The magnitude of the difference between the mean value and each individual value is called absolute error. Absolute error in measurement refers... View Article

Pressure exerted by an ideal gas molecule is given by the expression

The pressure exerted by an ideal gas molecule is given as P = MC2/3V where M is the mass of the gas, C is the r.m.s velocity of the gas... View Article

Find the final temperature of one mole of an ideal gas which has an initial temperature t K. The gas does 9 R joules of work adiabatically. The ratio of specific heats of this gas at constant pressure and at constant volume is 4/3.

TInitial = t K Work, W = 9R Ratio of specific heats, γ = Cp / Cv = 4/3 In an adiabatic process, we have W = R(TFinal – Tinitial) / (1-γ) 9R = R... View Article

What is not true for a cyclic process?

The process in which the initial and final state is the same is known as a cyclic process. It is a sequence of processes that leave the system in... View Article

The internal energy of an ideal gas depends on:

Internal energy of an ideal gas depends only on its internal kinetic energy which in turns depends only on the temperature of the gas.... View Article

Calculate the Displacement

Suppose our school is 1 km away from our house, and we go to school in the morning, and in the afternoon we come back. Then, the total... View Article

The internal energy of a given mass of gas in a system depends upon?

According to the assumptions of the Kinetic Theory of Gases, the molecules do not occupy any volume, and attractive forces are absent between... View Article

The internal energy and the work done by a system decreases by same amount then

Loss in internal energy = work done by the system, dQ = 0, therefore process is adiabatic. Loss in internal energy shows there would be a... View Article

According to kinetic theory of gases, 0 kelvin is the temperature at which for an ideal gas

According to the kinetic theory of gases, the internal energy of an ideal gas is zero at 0 kelvin.... View Article

Fill in the blank

The perfect gas equation is PV = nRT where n is the _____. number of moles amount of gas volume of gas pressure of gas Answer: 1.... View Article

Numbers of significant figures in the volume of a cube of side 6.103 m are

The number of significant figure in length of the side is 4. So the calculated volume should be rounded off to 4 significant figures. Multiplying... View Article

The force required to take away a flat plate of radius 4 cm from the surface of water is (surface tension of water = 70 dyne/cm)

Force due to surface tension acts all along the circumference of the circular plate. Therefore, force required to take away of plate is, F = T x... View Article

07 November 2019: PIB Summary & Analysis

Read the daily PIB update and stay up-to-date on current affairs for the UPSC exam. November 7th, 2019 PIB:- Download PDF Here Context: The... View Article

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