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How do I go about planning an 'unseen poetry' question?

First off, you are going to want to thoroughly read through and annotate the poem. Read the poem carefully at least twice through to make sure you can understand each line's literal meaning. Once you are hap...
AR
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What is the "chain rule"?

The "chain rule" is a handy little tool that we can use to find the derivative of a complicated function. Specifically, we use the chain rule when we have functions within functions. But what does ...
JF
Answered by Joe F. • Maths tutor
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2+2 is 4, minus 1, that's what?

Quick maths.
JF
Answered by Joe F. • Maths tutor
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How does fractional distillation work?

Fractional distillation works by using the fact that molecules of different sizes have different boiling points. Generally, the smaller a molecule, the lower its boiling point. When heating up a mixture of m...
DS
Answered by David S. • Chemistry tutor
33862 Views

What is the total energy of a spaceship of mass m, orbiting a planet of mass M in a circular orbit with radius r? The ship and the planet are taken to be an isolated system.

In the non-inertial frame of reference of the spaceship, a centrifugal and a gravitational force acts on the spaceship. If its mass is m and the positive direction is radially outwards, we have: F G = -GmM/r...
ID
Answered by Ivan D. • Physics tutor
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