Ugh i suck at this and need your help

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SUMMARY

The discussion centers on rearranging the formula for the period of a simple pendulum, T = 2π√(L/g), to solve for the acceleration due to gravity, g. The correct rearrangement is g = (4π²L) / T². The initial attempt, g² = (2πL) / T, was incorrect due to the misapplication of squaring the terms. Participants emphasized the importance of applying algebraic principles consistently to manipulate equations accurately.

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physicsismylife
I am doing a lab on finding g using a simple pendulum experiment.

the formula is:

T = 2pi sqrt(L/g)

how is that rearranged to find g?

I got g^2=2piL / T


is that right? thanks
 
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g = ((L)/((T)/(2pi))^2)
 
PIML,

You forgot to square the 2*pi
 
Just do the same things on each side.

e.g. if a = 1/b, then multiplying on both sides by b gives

ab = b/b = 1

ab = 1.

Similar for multiplication and to invert square root, simply square both sides.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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