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Describe how the forces change on a parachutist while they fall.

It is important to remember that there are four main concepts to keep in mind while thinking about the parachutist. To remember them, it might be helpful to use the acronym GADE: Gravity, Acceleration, Drag,...
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Answered by Nicholas D. • Physics tutor
21377 Views

Describe, using a diagram, the forces acting on the system of an object tethered to a string, rotating around a fixed point in free space. Will the string ever become horizontal?

Firstly, I would start by drawing a diagram of the system on the whiteboard, showing the object attached to the string, and the string at a fixed point. I would show using arrows that the object was rotating...
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Answered by Simon S. • Physics tutor
4933 Views

What should I know for my interview in Maths?

Well, this is a great question that almost every oxbrige applicant will ask. However, I am sure that for every person you ask, you will get a different answer. That's because there is no set syllabus, as in ...
JB
2135 Views

In terms of ecological pyramids, how can pyramids of numbers sometimes be a different shape from pyramids of biomass, even for the same food chain?

Ecological pyramids are a way of visualizing a food chain, either with the mass of organisms or the total number of the population of organims at each stage of the food chain. Pyramids of biomass are always ...
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Answered by Robynne N. • Biology tutor
18993 Views

Find the general solution of 2 dy/dx - 5y = 10x

Try y=Ae bx diffrentiate this (dy/dx = Abe bx ) and sub into 2dy/dx -5y = 0 to find complementary function. 2Abe bx - 5Ae bx = 0 2b - 5 = 0 b = 2.5 Find the particular integral using trial solution y = Cx+D,...
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Answered by Amy H. • Maths tutor
5457 Views