Top answers

Water flows through an electric shower at a rate of 6kg per minute. Assuming no heat is transferred to the surroundings, what power is required to heat the water by 20K as it flow through the shower?

To find the necessary power, we need to know how much water is flowing every second, and how much energy we need to heat that amount of water. Amount of water = 6kg per minute = 6/60 kg per second = 0.01 kg ...
TB
Answered by Theo B. • Physics tutor
2561 Views

find the gradient of the tangent to the curve y=x^2 at the point (4,16)

First of all you must differentiate this function, as this will give you the gradient function necessary to find the gradient at the point (4,16). To differentiate it you use the formula dy/dx= a n x (n-1) ,...
JM
Answered by Jessica M. • Maths tutor
8901 Views

What is the best way to go about analysing a primary source?

When attempting a source question, we must take a two-fold approach. The first step is to read it once or twice in order to gauge an overall tone and argument: what, on the whole, is the source trying to say...
EF
Answered by Ewan F. • History tutor
2473 Views

How do you find dy/dx for a set of parametric equations?

Using the chain rule:If the parameter used is 't', differentiate each equation with respect to 't' so that you have answers for dy/dt, and dx/dt.From the chain rule it is known that: "dy/dx=dy/du * du/d...
FC
Answered by Federico C. • Maths tutor
9480 Views

What is the C-O-H bond angle in propan-2-ol and why is this? [4 marks]

The bond angle is 104.5 degrees. This is because of the pairs of electrons around the oxygen atom: it has 2 bonded pairs and 2 lone pairs. Lone pairs and bonded pairs of electrons repel each other. However a...
AC
Answered by Adam C. • Chemistry tutor
18578 Views