Top answers

Convert 60km/h to m/s

60x1000=60,000 (convert km into m)60,000/(60x60)= 16.67m/s (here we divide the 60,000m by the number of seconds within an hour, which is 3600)Final answer is therefore 16.67m/s
RL
Answered by Rebecca L. • Maths tutor
16570 Views

How are the lungs specialised for gas exchange?

They have a high surface area to volume ratio allowing for more gas exchange to take place. The large surface area to volume ratio is partially to do with them having lots of alveoli. Alveoli have a 1 cell t...
RL
Answered by Rebecca L. • Biology tutor
2427 Views

Explain how the increasing use of fossil fuels and changes in agriculture may have contributed to global changes in temperature.

Here, think about splitting the answer into two, fossil fuel impacts on global temperature and then agricultural impacts. Initially you could comment an introductory sentence on the current trends of global ...
FW
Answered by Fiona W. • Geography tutor
2406 Views

Why is the oxygen dissociation curve shaped like it is?

At first, the shape of the Hb makes it hard for oxygen to bind to one of the polypeptide subunits so at low concentrations of oxygen, the saturation of oxygen is low too. Once the first molecule of oxygen ha...
Answered by • Biology tutor
2428 Views

Expand the brackets: (2x + 4)(x + 3)

Use the 'crab claw' technique for which order to expand your brackets in (demonstrate by drawing with whiteboard). So start with 2x multiplied by x = 2x 2. Then 2x multiplied by 3 = 6x. Then 4 multiplied by ...
MM
Answered by Molly M. • Maths tutor
4564 Views