These are the questions to answer from the clip: 1. What are the two layers in the walls of UK homes?
2.What is put in the gap/cavity between these layers
3.Does this have a high or low thermal conductivity?
4.Why is double glazing used in windows?
5.How do we reduce energy loss from the roof?

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

i think its c if i'm wrong

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle