Search our library of homework questions

Top answers

All subjects

All levels

Why did Ronald Reagan win the 1980 US presidential election?

Reagan's remarkable success resulted from Jimmy Carter's poor record and economic malaise, Reagan's personal charisma and a growing tide of conservatism in America.

The 1980 election came after the...

Answered by Charles W. • History tutor

7842 Views

Find the angle at which total internal refraction takes place when light is going from glass to air.

The angle at which this takes place is called the critical angle.

We can apply Snell's law in this situation: n₁sin C1 = n₂sin (90deg)

sin C = n₂/ n

Answered by Catherine T. • Physics tutor

1992 Views

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 radiati...

Answered by James W. • Physics tutor

38167 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 gene...

Answered by Aryan N. • Biology tutor

6326 Views