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Name 3 effects that the sympathetic nervous system has on human physiology?

Constriction of blood vessels Dilation of pupils Slows down digestion
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Answered by BARIBEFE V. • Biology tutor
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Write the name of each of the four components of the working memory model in the space provided.

Central executivePhonological loopVisuo-spatial sketch pad Episodic buffer
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Let y = x^x. Find dy/dx.

This question is suited to A2 maths students, particularly those who are doing further maths and may be looking for a challenge. In one question it tests the students ability to use implicit differentiation,...
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Answered by James G. • Maths tutor
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An elastic wire suspended from a workbench has a 2kg mass attached to its free end. The wire changes in length by 2cm. Calculate the elastic potential energy stored in the wire.

Using Hooke's law (F = k * e) we can find the spring constant. Rearranging for k, we find that k = (9.81 * 2)/0.02 = 981 N/m. To calculate this we needed to find the force acting on the wire (F = mg) and als...
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Answered by James G. • Physics tutor
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What is an atom?

It is composed of Protons, Neutrons and Electrons. The Proton is positively charged and is present in the central nucleus part of the atom.The Neutron has no charge and also is present in the nucleusThe Elec...
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Answered by Sam B. • Physics tutor
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