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How do you know when to integrate by parts?

This is usually a good idea if you have an integral with two functions multiplied together when one of the functions differentiates to a constant (could take more than one differentiation).For example to fin...
DH
Answered by Dominic H. • Maths tutor
3571 Views

What is a phospholipid and how does it form part of the cell membrane?

The cell membrane is a complex material made up of three main components: the phospholipid bilayer, proteins, and cholesterol. The tadpole-shaped phospholipid is made up of a phosphate head attached to a gly...
JC
Answered by Joseph C. • Biology tutor
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Propane and Chlorine react in the presence of UV light to give 2-chloropropane and HCl. Estimate the enthalpy change of this reaction using the following bond enthaplies (KJ/mol) : C-H=+413, Cl-Cl=+243, C-Cl=+346 and H-Cl=+432.

Write equation, ensuring both sides are balanced.CH 3 CH 2 CH 3 + Cl 2 → CH 3 CH(Cl)CH 3 + HCl (2.) Draw structural formula of all reactants and products. (3.) Count the number of, and which types of bonds a...
JW
Answered by Jasmine W. • Chemistry tutor
33310 Views

Where does the circle (x-6)^2+(y-7)^2=4 intersect with y=x+3

Where does the circle (x-6) 2 +(y-7) 2 =4 intersect with y=x+3We need to sub y=x+3 into the circle equation giving us an equation in just x:(x-6) 2 +(x-4) 2 =4Next we expand out the brackets:x 2 -12x+36+x 2 ...
NL
Answered by Nicola L. • Maths tutor
3601 Views

dh/dt = (6-h)/20. When t=0, h=1. Show that t=20ln(5/(6-h))

Part 1: This question requires us to first do some rearranging. The right hand side of the equation is in terms of h, and we are looking to find t in terms of h, so it won't be appropriate to simply integrat...
LA
Answered by Linetta A. • Maths tutor
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