Answer:
the ratio is 
Explanation:
Given

The RMS velocity of molecules in a gas is given by

where T=temperature

For T = 387K

For T = 774

dividing eqn 1 and eqn 2


Thus,the ratio is 
Answer:
5.1*10^3 J/m^3
Explanation:
Using E = q/A*eo
And
q =75*10^-6 C
A = 0.25
eo = 8.85*10^-12
Energy density = 1/2*eo*(E^2) = 1/2*eo*(q/A*eo)^2 = [q^2] / [2*(A^2)*eo]
= [(75*10^-6)^2] / [2*(0.25)^2*8.85*10^-12]
= 5.1*10^3 J/m^3
Answer: -2.5
Explanation:
1/2(-5)= -2.5
-2.5(1)= -2.5
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