Give Reason. A single fixed pulley does not multiply effort though it is widely used.​

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Asystematic approach to problem solving is called a (an)