1) When a beam of light is incident on a surface, it delivers energy to the surface. The intensity of the beam is defined as the energy delivered per unit area per unit time.
What is the unit of intensity, expressed in SI base units?
(a) kg m^-2 s^-1 (b) kg m^2 s^-3 (c) kg s^-2 (d) kg s^-3
2) At temperature close to 0 K, the specific heat capacity c of a particular solid is given by c = bT^3, where T is the thermodynamic temperature and b is a constant characteristic of the solid.
what are the units of constant b, expressed in SI base units?
(a) m^2 s^-2 K^-3 (b) m^2 s^-2 K^-4 (c) kg m^2 s^-2 K^-3 (d) kg m^2 s^-2 K^-4
---> answers with reasonss.. TQ
What is the unit of intensity, expressed in SI base units?
(a) kg m^-2 s^-1 (b) kg m^2 s^-3 (c) kg s^-2 (d) kg s^-3
2) At temperature close to 0 K, the specific heat capacity c of a particular solid is given by c = bT^3, where T is the thermodynamic temperature and b is a constant characteristic of the solid.
what are the units of constant b, expressed in SI base units?
(a) m^2 s^-2 K^-3 (b) m^2 s^-2 K^-4 (c) kg m^2 s^-2 K^-3 (d) kg m^2 s^-2 K^-4
---> answers with reasonss.. TQ
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1). (c)kg s^-2
because it is work/area =N.m/m^2
2).(d)kg m^2 s^-2 K^-4
Specific heat capacity unit is J/kg K (c)
and T^3=K^3
J/kg K=b K^3
=>b=J/kg K^4
=Kg m^2 s^-2 /kg K^4
=kg m^2 s^-2 K^-4
because it is work/area =N.m/m^2
2).(d)kg m^2 s^-2 K^-4
Specific heat capacity unit is J/kg K (c)
and T^3=K^3
J/kg K=b K^3
=>b=J/kg K^4
=Kg m^2 s^-2 /kg K^4
=kg m^2 s^-2 K^-4