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Dimensional Constants : Gravitational constant, plank’s constant. Dimensionless Constants : π, e
(i) Boltzmann Constant: (i) k=Heat / temperature ⇒ [k] =ML²T²/K = [M¹L²T⁻²K⁻¹] (ii) [J] = [Work\Heat] = M¹L²T⁻² / M¹L²T⁻² = [M⁰L⁰T⁰]
(a) SONAR → Sound Navigation and Ranging. (b) RADAR → Radio Detection and Ranging.
2%
Strain, refractive index.
Stress, pressure, modulus of elasticity.
Work, energy and torque.
1u = 1.66 × 10⁻ ²⁷ kg
mN means milli newton, 1 mN = 10–³ N, Nm means Newton meter, nm means nano meter.
The unit of left hand side is metre so the units of ct² should also be metre. Since t² has unit of s², so the unit of c is m/s².
Give examples of dimensional constants and dimensionless constants.
Dimensional Constants : Gravitational constant, plank’s constant. Dimensionless Constants : π, e
Dimensional Constants : Gravitational constant, plank’s constant.
See lessDimensionless Constants : π, e
Deduce dimensional formulae of-(i) Boltzmann’s constant (ii) mechanical equivalent of heat.
(i) Boltzmann Constant: (i) k=Heat / temperature ⇒ [k] =ML²T²/K = [M¹L²T⁻²K⁻¹] (ii) [J] = [Work\Heat] = M¹L²T⁻² / M¹L²T⁻² = [M⁰L⁰T⁰]
(i) Boltzmann Constant:
See less(i) k=Heat / temperature ⇒ [k] =ML²T²/K = [M¹L²T⁻²K⁻¹]
(ii) [J] = [Work\Heat] = M¹L²T⁻² / M¹L²T⁻² = [M⁰L⁰T⁰]
Name the technique used in locating. (a) an under water obstacle (b) position of an aeroplane in space.
(a) SONAR → Sound Navigation and Ranging. (b) RADAR → Radio Detection and Ranging.
(a) SONAR → Sound Navigation and Ranging.
See less(b) RADAR → Radio Detection and Ranging.
Given relative error in the measurement of length is .02, what is the percentage error ?
2%
2%
See lessGive two examples of dimension less variables.
Strain, refractive index.
Strain, refractive index.
See lessName the physical quantities that have dimensional formula [ML⁻¹ T⁻²].
Stress, pressure, modulus of elasticity.
Stress, pressure, modulus of elasticity.
See lessName same physical quantities that have same dimension
Work, energy and torque.
Work, energy and torque.
See lessHow many kg make 1 unified atomic mass unit ?
1u = 1.66 × 10⁻ ²⁷ kg
1u = 1.66 × 10⁻ ²⁷ kg
See lessWhat is the difference between mN, Nm and nm ?
mN means milli newton, 1 mN = 10–³ N, Nm means Newton meter, nm means nano meter.
mN means milli newton, 1 mN = 10–³ N, Nm means Newton meter, nm means nano meter.
See lessIf x = a + bt + ct², where x is in metre and t in seconds, what is the unit of c ?
The unit of left hand side is metre so the units of ct² should also be metre. Since t² has unit of s², so the unit of c is m/s².
The unit of left hand side is metre so the units of ct² should also be metre. Since t² has unit of s², so the unit of c is m/s².
See less