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Factorise h^2 - 36.

Notice that 36 is a square number equivalent to 6 2 . Can also tell this as the expression contains no coefficients of h so they must cancel each other out. Using this information we can deduce that the fact...
EC
Answered by Ella C. • Maths tutor
3322 Views

The complex number -2sqrt(2) + 2sqrt(6)I can be expressed in the form r*exp(iTheta), where r>0 and -pi < theta <= pi. By using the form r*exp(iTheta) solve the equation z^5 = -2sqrt(2) + 2sqrt(6)i.

Using an argand diagram we can see that this (in fact all) complex numbers create a right angled triangle and using this fact we can find the modulus of this number. The modulus of this number is the 'r' in ...
TG
3715 Views

Outline how Lorenz and Harlow studied attachment using animals. (6 marks)

I would suggest an exemplar answer to this question to be:Lorenz studied imprinting in goslings by dividing the eggs from a mother, hatching, and rearing them in different environments. Half were left with t...
HS
Answered by Hannah S. • Psychology tutor
24221 Views

Why is the first ionisation energy of barium larger than the first ionsiation energy of caesium?

Barium has one more proton than caesium. The outer electrons of both elements are in the same shell so they feel the same shielding effect. However, as barium has one more proton, barium's outer electrons wi...
JL
Answered by Jeremy L. • Chemistry tutor
6227 Views

Rearrange the following to make c the subject: 11a + 5c = d ( 6 + 2c )

Steps: (1) Multiply out the brackets on the left handside [11a + 5c = 6d + 2dc]. (2) Put all terms containing c on one side and all other terms on the other side of the equation [ 5c - 2dc = 6d - 11a]. (3) T...
JL
Answered by Jeremy L. • Maths tutor
4015 Views