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Use energy difference between ground and first level to find E1-E0. Energy of the electron a nth energy level is found using En = (n^2pi^2hbar^2)/2mL^2Where n is the energy level plus 1, pi and h...

First you must convert the diameter into cm from mm:19/10 = 1.9cmThen you must find the radius of the ring:radius = diameter/2 = 1.9/2 = 0.95 cmThen you can calculate the area:area = 2πr² = 2 x...

When writing a 12 mark answer in Psychology, I find it is most helpful to first understand the Assessment Objectives. In these types of question, you are awarded marks for AO1 (content) and A03 (evaluatio...

First convert y into a suitably form.cos(2x) = 1 - 2cos²(x)cos²x = (1-cos(2x))/2
integral of y = integral of (1-cos(2x))/2 = (1/2)*(x-(1/2)sin(2x)) + C = x/2 - sin(2x)...