calculate the valive of R in the circuit diagram shown above given that the effective resistance of the circuit is 4.0 and the internal resistance of the cell is negligible​

What are similarities and differences of reflection, refraction, diffraction and absorption?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction