Recent content by duckandcover

thanks for the replies. to clarify the question, when using solar panels unlimited source of energy why is the external load made to bigger to increase the efficiency of the circuit when there is no cost from the sunlight?

thanks, one other thing i don't understand is when there is a constant power supply cost does not matter eg the sun for solar panels why is efficiency taken into consideration if it doesn't matter that power is lost in the circuit.

What is the physical explanation for the power transfer in a circuit being maximum when the resistance of the system is equal to the internal resistance? maybe heat loss? any help would be appreciated as i understand the mathematical proof but do not know much about the physical causes.

What is the physical explanation for the power transfer in a circuit being maximum when the resistance of the system is equal to the internal resistance? maybe heat loss? any help would be appreciated as i understand the mathematical proof but do not know much about the physical causes.

thanks that clears it up

Why is it that when a longitudinal wave is represented by a (pressure/position) and a (displacement/position) graph does the displacement 0 represent a compression or rarefaction (maximum or minimum pressure)?

see microsoft word attatchment or mathmatica attatchment for the attempt. for a contridiction i made the sum equal to the multiple of 8.

sorry should be 2x+2 i will edit the post the document workings are as 2x+2 further help would be appreciated thanks

alternative non word attachment, mathematica

Homework Statement GCSE past paper question. prove algebraically that the sum of the squares of any two consecutive even integers is never a multiple of 8Homework Equations none The Attempt at a Solution n and x are integers 2x and 2x+2 represent two consecutive even integers. see attachment.