<em><u>because if any metals are there in the flour it would attract it...</u></em>
<em><u>hope it helps you</u></em>
<em><u>and mark as best answer please</u></em>
Well,
arctan is a bijection from R into (-pi/2 , pi/2)*and
pi is a period of tangent function:
so
as we have : tan(7pi/4) = tan(pi - pi/4) = - tan(pi/4)
we finally get :
<span>arctan(tan(7pi/4)) = artan(tan(- pi/4)) = - pi/4
</span>
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Answer:
Explanation:
V = Voltage = 230 V
I = Current = 1.8 A
= Temperature change = 
t = Time taken = 2 minutes
m = Mass of liquid = 750 g
c = Specific heat capacity of the liquid
Energy required to heat the water is equal to the heat released due to current passing
The specific heat capacity of the liquid is
