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Find a quarter of the area of a circle with a diameter of 10cm.

To find a part of the area we need the whole area first. Find the formula for the area of a circle: A= pi x r 2 We have been given the diameter so we need to work out what the radius is, half of the diameter...
JS
Answered by Joseph S. • Maths tutor
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A sigma0 particle with mass 1193 MeV/c^2 decays into a lambda0 particle with mass 1116 MeV/c^2 a photon. Find the energy and momentum of the photon, assuming that the kinetic energy of the lambda0 particle is negligible.

This is a standard A-level particle physics question. To solve it, we need to use three equations given in the formula sheet of the paper. To find the energy of the photon, we use Einsteins famous energy-mas...
PF
Answered by Peter F. • Physics tutor
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What are the different types of hazards associated with volcanic eruptions?

The hazards can be categorized into two different types: Primary and Secondary. Of the primary hazards, there are 4 main ones that pose a threat to life and property: lava flows, pyroclastic flows, tephra fa...
SK
Answered by Simeon K. • Geography tutor
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the first four terms in a sequence are 2, 6, 10, 14. what is the nth term? and what is the sum to n terms of the sequence?

the nth term formula is the sum of the first term (a) and the second to last term (n-1) * the common difference (d). so a + (n-1)d where a = 2 and d = 4 in this case is 2 + (n-1) 4 = 4n - 2. the sum to n ter...
JL
Answered by Jake L. • Maths tutor
18546 Views

Explain the function of the human heart

Describe where the human heart is located - i.e. thoracic cavityDefine the function of the heart - to supply the body with blood, act as a pumpStructure of the heart - 4 chambers (2 ventricles, 2 atria), SAN...
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