Top answers

Why can heat only be transferred through a vacuum by radiation, and not conduction or convection? (3)

Heat transfer by conduction and convection works by particles colliding and transferring energy, as there are no particles in a vacuum heat transfer can only occur by radiation. This is because radiation inv...
JW
Answered by James W. • Physics tutor
43698 Views

Explain why an athlete, who has just run a marathon on a summers day, would have higher concentration of ADH (anti-diuretic hormone) in their blood.

The athlete is running a marathon, therefore their muscles are constantly contracting and therefore using up ATP (Energy). ATP is generated through respiration in cells in the human body. Respiration generat...
AN
Answered by Aryan N. • Biology tutor
7052 Views

How do I structure my coursework/ exam essays? Do you have any other tips for essay technique?

APPROACHING ESSAYS : FIRST APPROACH : Really try to think about and dismantle the question. What exactly are you being asked? What would you like to write about? Is there a way you can twist the question so ...
AT
9910 Views

'Explain how an act utilitarian would make a moral decision'

Act utilitarians assert that, when making morally relevant choices, on a case-by-case basis, consequences ought to be the only frame of reference for a moral agency. Thus, they uphold the primacy of the Util...
CM
3538 Views

Explain why Phenol is more reactive than Benzene with bromine water.

To answer this we must look at the structure of both. Phenol has an OH group attached whilst benzene has no side groups. The OH is electron donating, the P orbital on the Oxygen overlaps with the delocalised...
TD
23928 Views