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A black body at 1500 K emits maximum energy of wavelength 20000 A. If sun emits maximum energy of wavelength 5500 A, what would be the temperature of sun ?
25
Oct
A black body at 1500 K emits maximum energy of wavelength 20000 A. If sun emits maximum energy of wavelength 5500 A, what would be the temperature of sun ? A black body at 1500 K emits maximum energy of wavelength 20000 A. If sun emits maximum energy of wavelength 5500 A what would be [...]
A body emits maximum energy at 4253 A and the same body at some other temperature emits maximum energy at 2342 A. Find the ratio of the maximum energy radiated by the body
25
Oct
A body emits maximum energy at 4253 A and the same body at some other temperature emits maximum energy at 2342 A. Find the ratio of the maximum energy radiated by the body A body emits maximum energy at 4253 A and the same body at some other temperature emits maximum energy at 2342 A. [...]
A spherical ball of radius 1 cm coated with a metal having emissivity 0.3 is maintained at 1000 K temperature and suspended in a vacuum chamber whose walls are maintained at
25
Oct
A spherical ball of radius 1 cm coated with a metal having emissivity 0.3 is maintained at 1000 K temperature and suspended in a vacuum chamber whose walls are maintained at A spherical ball of radius 1 cm coated with a metal having emissivity 0.3 is maintained at 1000 K temperature and suspended in a [...]
A cube and a sphere of equal edge and radius, made of the same substance are allowed to cool under identical conditions. Determine which of the two will cool at a faster rate.
25
Oct
A cube and a sphere of equal edge and radius, made of the same substance are allowed to cool under identical conditions. Determine which of the two will cool at a faster rate. A cube and a sphere of equal edge and radius made of the same substance are allowed to cool under identical conditions. [...]
A sphere, a cube and a thin circular pate are heated to the same temperature. If they are made of same material and have equal masses, determine which of these three objects
25
Oct
A sphere, a cube and a thin circular pate are heated to the same temperature. If they are made of same material and have equal masses, determine which of these three objects a cube and a thin circular pate are heated to the same temperature. If they are made of same material and have equal [...]
An indirectly heated filament is radiating maximum energy of wavelength 2.16 * 10^-5 cm. Find the net amount of heat energy lost per second per unit area. The temperature of the
25
Oct
An indirectly heated filament is radiating maximum energy of wavelength 2.16 * 10^-5 cm. Find the net amount of heat energy lost per second per unit area. The temperature of the An indirectly heated filament is radiating maximum energy of wavelength 2.16 * 10^-5 cm. Find the net amount of heat energy lost per second [...]
In Newton’s law of cooling in the form d delta theta / dt = -k delta theta what factors does the constant k depend upon ? What are the dimensions of k ?
25
Oct
In Newton’s law of cooling in the form d delta theta / dt = -k delta theta what factors does the constant k depend upon ? What are the dimensions of k ? In Newton's law of cooling in the form d delta theta / dt = -k delta theta what factors does the constant [...]
The spectrum of a black body at two temperatures 27 C and 327 C is shown in the figure. Let A1 and A2 be the areas under the two curves, respectively. Find the value of A2/A1.
25
Oct
The spectrum of a black body at two temperatures 27 C and 327 C is shown in the figure. Let A1 and A2 be the areas under the two curves, respectively. Find the value of A2/A1. respectively. Find the value of A2/A1. The spectrum of a black body at two temperatures 27 C and 327 [...]
The initial temperature of a body is 80 C. If its temperature falls to 64 C in 5 minutes and to 52 C in 10 minutes. Find the temperature of surrounding.
25
Oct
The initial temperature of a body is 80 C. If its temperature falls to 64 C in 5 minutes and to 52 C in 10 minutes. Find the temperature of surrounding. The initial temperature of a body is 80 C. If its temperature falls to 64 C in 5 minutes and to 52 C in [...]
A calorimeter of mass 0.2 kg and specific heat 900 J/Kg-K contains 0.5 kg of a liquid of specific heat 2400 J / kg-K. Its temperature falls from 60 C to 55 C in one minute. Find the rate of cooling.
25
Oct
A calorimeter of mass 0.2 kg and specific heat 900 J/Kg-K contains 0.5 kg of a liquid of specific heat 2400 J / kg-K. Its temperature falls from 60 C to 55 C in one minute. Find the rate of cooling. A calorimeter of mass 0.2 kg and specific heat 900 J/Kg-K contains 0.5 kg [...]