Read each statement below carefully and state, with reasons and examples, if it is true or false: A scalar quantity is one that Must be dimensionless.

False. Explanation: Total path length is a scalar quantity. Yet it has the dimension of length.

Read each statement below carefully and state, with reasons and e…

The factors affecting Brownian motion are viscosity of the medium density of the medium, temperature of the medium and size of the particles.

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Internal energy of gas is maximum and internal energy of solid is minimum.

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Force is required to maintain uniform motion of an object.

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The law showing the relationship between the wavelength of peak emission and temperature of an ideal black-body in Planck's law.

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The area of the velocity-time graph is the value of the physical quantity displacement.

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The value of gravitational acceleration at the center of the earth will not be zero.(True/False)

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The increase in surface energy is called surface tension.
Surface tension $T =\frac{ W }{ A }$ Joule $/ m ^2$

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The smallest unit of time is shake

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Measurement of screw gauge is most accurate in between the vernier callipers and screw gauge.

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1eV = 16 * 10^-19 J

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