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What visible wavelengths of light are strongly reflected from a 390-nm-thick soap bubble?
The jet transport B is flying north with a velocity
A cylindrical beaker of height 0.100 m and negligible weight is filled to the brim with a fluid of density ρ = 890 kg/m3 . When the beaker is placed on a scale, its weight is measured to be 1.00 N
A 30 nC charge experiences a 0.035 N electric force.
What is the magnitude of the electric force on charge A in the figure?
In (Figure 1), charge q2 experiences no net electric force. What is q1?
Two identical metal spheres A and B are connected by a plastic rod.