Units and Measurements

Related Questions

• Unit of energy in SI system is

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• The period of oscillation of a simple pendulum is given by $T = 2\pi \sqrt {\frac{l}{g}} $where l is about 100 cm and is known to have 1mm accuracy. The period is about 2s. The time of 100 oscillations is measured by a stop watch of least count 0.1 s. The percentage error in g is

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• If the velocity of light \[(c)\], gravitational constant \[(G)\] and Planck's constant \[(h)\] are chosen as fundamental units, then the dimensions of mass in new system is

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• According to Newton, the viscous force acting between liquid layers of area A and velocity gradient \[\Delta v/\Delta z\] is given by \[F = - \eta A\frac{{\Delta v}}{{\Delta z}}\] where \[\eta \] is constant called coefficient of viscosity. The dimension of \[\eta \] are

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• The dimensions of permittivity \[{\varepsilon _0}\] are

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