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Describe how air is moved in to and out of your lungs.

The process of moving air into and out of your lungs is called ventilation, or breathing. Ventilating the lungs is brought about by the contraction and relaxation of the intercostal muscles and the diaphragm...
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Answered by Amy B. • Biology tutor
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The internet and instant communication technologies are profoundly changing our world for the better. Do you agree?

The internet is a function which allows individuals to access masses of data, research information as well as create social profiles. Instant communication technologies include mediums which provide individu...
DD
Answered by Dilara D. • LNAT tutor
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How does Priestley explore the importance of social class in ‘An Inspector Calls’? Write about: • some ideas about social class in the play • how Priestley presents the importance of social class.

Priestly explores the importance of social class by highlighting that it is not realistic to abdicate from a sense of communal responsibility when such a vast number of the population is going through such h...
DD
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Describe a simple experiment to determine the speed of sound in air.

One method to measure the speed of sound would require two people, a large open space, a starting pistol that produces smoke instantaneously when fired, a stopwatch and a tool to measure long distances (e.g....
AE
Answered by Alex E. • Physics tutor
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State why it is initially unexpected for alkenes to undergo electrophilic addition with bromine. Explain why this reaction does indeed occur.

Bromine exists as Br 2 , and since both bromine atoms are identical - their electronegativities identical, - the electron density is distributed evenly across the molecule (it is non-polar, the atoms have eq...
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Answered by Kai C. • Chemistry tutor
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