Stefan 's Law : `EpropT^(4)orE=sigmaT^(4)` , where `sigma` is Stefan 's constant .Its value is `5.07xx10^(-9)-Jm^(-2)K^(-4)"second"^(-1)` . Is the statement true?

The rate constant of a reaction is 1.2 xx10^(-5) mol^(-2)"litre"^(2)s^(-1) . The order of the reaction is:

Stefan Boltzman law : E=esigma(T^(4)-T_(0)^(4)) where E is emittance , e is emissivity , sigma is Stefan 's constant , T is temperature of body , T_(0) is temperature of surroundings . Is the statement true?

Solar Constant (s) : s =((r )/(R ))^(2)sigmaT^(4) , where r= radius of sun ,R= distance of the earth from the centre of sum , T= absolute temperature of sun . Value of solar constant is 1.937 "cal cm"^(-2) "min"^(-1) . Is the statement true?

Evaluate : int(x^2-1)/(x^4+kx^2+1)dx , where k is any constant.

Identify the order of a reaction of the following rate constants : k= 9.3xx10^-4 mol L^-1 s^-1

Identify the reaction order from each of the following rate constants. k = 3 xx 10^(-4) s^(-1)

Identify the reaction order from each of the following rate constants. k = 2.3 xx 10^(-5) L mol^(-1) s^(-1)

Identify the reaction order of the following rate constants. k= 2.3xx10^-5 L mol^(-1) s^(-1) .