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Tutor profile: Ryan L.

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Ryan L.
Math and Physics Tutor
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Questions

Subject: Python Programming

TutorMe
Question:

Describe the magic function in one or two sentences: magic_function = lambda x, y="vegetables": str(x) " loves " str(y)

Inactive
Ryan L.
Answer:

The magic function takes one or two inputs, those inputs can be anything. The output is the sentence is either "first_input loves second_input" or "first_input loves vegetables" if there is only one variable input.

Subject: Basic Math

TutorMe
Question:

(3 - 3!) + $2^2^2$ / 4

Inactive
Ryan L.
Answer:

(3 - 3*2*1) + 2^4 / 4 (3 - 6) + 16 / 4 -3 + 4 1

Subject: Physics

TutorMe
Question:

You feel the ground tremble beneath your feet as the Headless Horseman's blazing jack-o-lantern head is coming into view. It stops and stomps it's hooves while you thank the stars for the rushing river that separates you two. The Horseman gallops to the river's edge and hurls the flaming pumpkin across the river toward you! For the sake of simplicity, let's say that you're 100 meters from the edge of the river that the head was launched from. The pumpkin is a sphere of radius 1m. The pumpkin is 3m above the ground when lobbed and is chucked at a 45 degree angle. How hard does the Horseman have to hurl his head to hit you exactly on your head? (use your own height, here) Bonus points if you can do this without a calculator, I'll allow 'hand-waiving'.

Inactive
Ryan L.
Answer:

First I'll draw a picture (I will draw a picture for literally any physics homework problem). Then I'll use basic Newtonian mechanics to write the equations for both left/right and up/down coordinates. x: t * cos(45) * v = 100m y: t * sin(45) * v - .5 * g * t^2 = (your_height - 3m) let's just say I'm 2m tall and acceleration due to gravity is 10 m/s/s also notice that cos(45) = sin(45) then notice that LHS of the x part is in the LHS of the y part, substitute the RHS of the x part in 100m - 5m/s/s * t^2 = -1m 5t^2 = 101 -101 is basically -100 t^2 ~= 20s^2 t ~= sqrt(20) from before t*cos(45)*v=100 cos(45) = 1/sqrt(2) v = 100 * sqrt(2) / sqrt(20) = 100 / sqrt(10)

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