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Explain the process of ventilation in human lungs.

Ventilation is movement of air into and out of lungs;
volume of thorax/lungs/chest increased/decreased;
pressure in thorax/lungs/chest decreased/increased;

air flows from higher to lowe...

Answered by Anahita K. • Biology tutor

2012 Views

By using an integrating factor, solve the differential equation dy/dx + 4y/x = 6x^-3 (6 marks)

Answer : y = 3/x²+ c/x⁴ Integrating factor is 4/x (1 mark) => I = e^{integral (4/x) dx}(1 mark) => I = x⁴(1 mark). Using the f...

Answered by Mark D. • Further Mathematics tutor

6670 Views

A curve has the equation y=sin(x)cos(x), find the gradient of this curve when x = pi. (4 marks)

Option 1 - Differentiate using product rule giving dy/dx = cos²(x) - sin²(x). (2 marks) Subbing in x as pi (1 mark) then gives (-1)²+ (0)². ...

Answered by Mark D. • Maths tutor

6496 Views

Iqbal Khan’s production of Othello (2015) breaks with tradition in casting both Othello and Iago as black men - in what way does this shift the emphasis of the play?

Often dubbed a 'race play', Shakespeare's 'Othello' usually pits the jealousy of a white man against the success of a Moor, illustrating the destructive consequences of racial intollerance. Khan's casting...

Answered by Michael M. • English tutor

3674 Views

Explain the general trend in first ionisation energy across period 2 in the periodic table.

Across period 2, the nuclear charge increases from Li (3+) to Ne (10+) as protons are added to the nucleus. - The electros are removed from the same main energy level and electrons in the same main ...

Answered by Eyad A. • Chemistry tutor

29573 Views