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Chinas One Child Policy: What, When, Why

WHAT -Based on reward and penalty approaches the One Child Policy encourages families to only have one child. -Those that have only one child receive priority for loans, materials, technical assistance and s...
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Answered by Amirah K. • Geography tutor
6075 Views

What does the double slit experiment tell us about light?

Imagine an opaque barrier (no light can get through) with two parallel slits in it, onto which we shine a coherent light source (light of only one wavelength and in phase - a laser, for example, can produce ...
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Answered by Adam O. • Physics tutor
9073 Views

Show that the orbital period of a satellite is given by T^2=(4pi^2r^3)/(GM) where r is the orbital radius, G is the gravitational constant and M is the mass of the Earth. Then find the orbital radius of a geostationary satellite.

The first part of this question relies on remembering one key principle which is that for a satellite, or any body orbiting in a circle, centripetal force is provided by gravitational force. The rest is simp...
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Answered by Michael H. • Physics tutor
39994 Views

How do I form the negative in French?

To form a negative phrase in French there are always two parts, called particles, which most go around the verb. For example, 'ne...pas': the 'ne' must come before the verb and the 'pas' must come after the ...
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Answered by Elinor R. • French tutor
4414 Views

How do I integrate terms with sin^2(x) and cos^2(x) in them? For example integrate (1+sin(x))^2 with respect to x

As you will be aware, it is not easy to directly integrate terms involving sin^2(x) and cos^2(x), so we use a substitution to turn them into something which we can integrate. From the double angle formula fo...
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Answered by Michael H. • Maths tutor
18952 Views