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What is thermionic emission?

Thermionic emission is the process by which electrons are emitted by a metal as a result of the heating of the metal. The electrons which are emitted are all from the sea of free electrons which bond the met...
NS
Answered by Noah S. • Physics tutor
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Temperature affects cell membrane permeability. At high temperatures, proteins that support and maintain cell membranes may be denatured, increasing membrane permeability.How may membrane permeability change at low temperatures?

It is important that a cell membrane is intact as it protects cell contents from the external environment, and controls what can enter and exit the cell. At temperatures below normal, cell membrane permeabil...
RL
Answered by Raisa L. • Biology tutor
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What happens to the pressure inside a sealed canister of gaseous oxygen when it is transferred from a cool environment to a warmer environment?

The pressure increases when it is moved from a cool environment to a warmer environment. This is because the molecules of oxygen have more kinetic energy in a warmer environment and therefore move faster. Th...
AC
Answered by Adam C. • Physics tutor
2315 Views

During exercise changes happen at the skin involving blood vessels and sweat glands, describe these changes.

During exercise body temperatures increase, as this can be damaging to biological processes (enzymes may be denatured) the body tries to maintain a constant body temperature in a process called homeostasis. ...
AC
Answered by Adam C. • Biology tutor
8612 Views

What is the relative molecular mass of ammonia?

Ammonia is NH 3 . Nitrogen has a relative atomic mass of 14. Hydrogen has a relative atomic mass of 1. 14 + (3 x 1) = 17 Ammonia has a relative molecular mass of 17.
AC
Answered by Adam C. • Chemistry tutor
53655 Views