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for the first portion. if the object is moving left then right along the right-axis then what is the difference of an object that is moving in a curved manner like B and an object that would move in a staright manner like A

i attached the diagram. a) the object whose world line is labeled B is moving along the x-axis T or F? I said false because yes while it is moving along the x-axis it's also moving along the y-axis. So it's moving in two dimensions not just one. is my answer and reasoning correct? The world...

i know how do to partial derivatives but is the uncertainty just the partial derivative of the equation.

calculating uncertainty I have a lab where I have to calculate the theoretical value of R using the following equation and then find the uncertainty in R. R=(xCOS(y))*((-xSIN(y)-SQRT((xSIN(y))^2-2*-9.8*z))/-9.8) *I know the values of x,y,z and their respective uncertainties. The problem...

I'm using excel if that makes any difference whatsoever

I have a lab where I have to calculate the theoretical value of R using the following equation and then find the uncertainty in R. R=(xCOS(y))*((-xSIN(y)-SQRT((xSIN(y))^2-2*-9.8*z))/-9.8) *I know the values of x,y,z and their respective uncertainties. The problem is that we have only...