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What is active transport?

All of this is to do with moving stuff over a barrier called a cell membrane. I want you to imagine the cell membrane to be like a border of a country and the stuff to be different pizzas being delivered ove...
RK
Answered by Raj K. • Biology tutor
4476 Views

How do I find the roots and and coordinates of the vertex of the graph y = 2x^2 + 4x - 8 ?

y = 2x^2 + 4x - 8y = 2( x^2 + 2x - 4)Completing the square:y = 2( (x+1)^2 - 1 - 4 )y = 2(x+1)^2 -10the vertex of graph lies at the minimum value of y, and this occurs when x = -1:y = 2(-1+1)^2 -10y = -10ther...
JA
Answered by Joe A. • Maths tutor
7979 Views

I've been given London by William Blake to analyse for homework but I'm really struggling. There really aren't that many devices in it. My question is, how does William Blake present powerlessness in London?

You're right, there aren't that many devices in London. That's not a problem, though. Your question gives you a lot of help. You're looking for powerlessness and how it's presented. So let's find an example....
EK
11879 Views

State one advantage and one disadvantage of using a CT scanner, compared with ultrasound scanning, for forming images of the inside of the human body. (2 Marks)

Advantage- Computeried Tomography provides an image with greater resolution than ultrasound. (1 mark) It also produces a 3D image made from lots of individual slices which can be viewed from various differen...
TC
Answered by Tate C. • Physics tutor
11768 Views

The cyclist used the brakes to slow down and stop the bicycle. A constant braking force of 140 N stopped the bicycle in a distance of 24 m. Calculate the work done by the braking force to stop the bicycle. Give the unit. (3 Marks)

Work done= force x distance.Here we are told that the force is 140N. The braking distance of the bike is 24m. Therefore, work done is 140 x 24=3360 (2 marks) Joules.(1 mark)The units of work done are Joules....
TC
Answered by Tate C. • Physics tutor
13171 Views