Choose the right answer from the following
Which of the following measurements is a velocity? 5 m/s 5 m/s North 5 m/s2 5 m/s2 North Explanation: 5... View Article
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What is the distance of the star (in km) from which a light takes 3 x 109 year to reach the earth? The speed of light, is C = 3 x 108 m/s.
Time = 3 x 109 x 365 x 24 x 60 x 60 = 9.46 x 1016 s Distance =... View Article
Which of the following is not an example of a rectilinear motion? (1) The motion of planes in the sky (2) Kids sliding down from a slide (3) Gravitational forces acting on objects resulting in free fall (4) A car moving in a circular path
Answer: (4) A car moving in a circular path A motion along a straight line is called rectilinear motion. A car... View Article
The degree of freedom for tri atomic gas is (1) 6 (2) 4 (3) 2 (4) 8
Answer: (1) 6 The degrees of freedom of the system is given by the formula f = 3N – K... View Article
The speed of an object in a particular direction is called
The speed of an object in a particular direction is called velocity. Definition Velocity can also be defined as... View Article
The ratio of displacement to distance is____________ (1) Always less than 1(2) Less than or equal to 1 (3) Always equal to 1(4) Always more than 1
Answer: (2) Less than or equal to 1 The ratio of displacement to distance is less than or equal to... View Article
The most suitable instrument for measuring the size of an atom is.
Only electron microscope has resolution of 0.5-0.6 Angstrom which is less than the size of an atom.
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.
Which is the most accurate atomic clock?
Caesium atom clock is used as standard clock for measuring time.
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... 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... 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... 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,... 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... 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... 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... 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... 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... 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.
Fill in the blank
The perfect gas equation is PV = nRT where n is the _____. number of moles amount of gas volume... View Article
