Answer:
W = 2.5*10⁻⁴ J (by me)
Explanation:
μy = 5.0 x 10⁻⁴ A·m²
By = 0.5 T
∅ = 0º
If
μx = 5.0*10⁻⁴ A·m²
By = 0.5 T
∅ = 90º
We get ΔU as follows
ΔU = Uf - Ui
Ui = - μy*By*Cos ∅ = - 5.0*10⁻⁴ A·m²*0.5 T*Cos 0º = - 2.5*10⁻⁴ J
Uf = - μx*By*Cos ∅ = - 5.0*10⁻⁴ A·m²*0.5 T*Cos 90º = 0 J
Finally we use the equation
W = - ΔU = - (0 - (- 2.5*10⁻⁴)) J = - 2.5*10⁻⁴ J (by the field)
W = 2.5*10⁻⁴ J (by me)
The answer is B) and here's why:
since the radius of the wheel is 3 and the radius of the axle is 1 you multiply 3 by 1 which is 3. Then you multiply it with 100 so 3 x 100 is 300. But there is no 300 the closest answer is B)200. so B should be the answer
<em><u>plz</u></em><em><u> </u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>follow</u></em><em><u> </u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em>
<em><u>.</u></em><em><u>me</u></em>
<em><u /></em><em><u /></em><em><u /></em>
C is the only right answer in this
Explanation:
the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I^2Rt