Top answers

All subjects
All levels

Explain Cohesion-Tension Theory

Transpiration of water through stomata creates low potential at the top of the xylem. Water molecules stick together via hydrogen bonds in a process known as COHESION. This occurs because...

Answered by Joanne M. Biology tutor
8225 Views

Describe and explain the photoelectric effect.

Consider a single photon (a particle of light) of a particular energy striking the surface of a metal. If the energy of this photon exceeds the work function of the metal, it will remove a single electron...

Answered by Abbie R. Physics tutor
1400 Views

Explain how red-shift provides evidence for the Big Bang theory.

Red-shift describes the phenomenon whereby the wavelength of light from a source increases as it travels through spacetime, hence observed as being 'shifted' to the red end of the spectrum (as red light h...

Answered by Abbie R. Physics tutor
11109 Views

Explain what happens when an impulse arrvies at a junction between two neurones

At each junction there is a neurone that comes before it called the presynaptic neurone and one that comes after called the post synaptic neurone and the space between the two neurones is called the synap...

Answered by amy b. Biology tutor
2376 Views

How do we form the pluperfect tense?

To form the pluperfect tense, we need two key ingredients: 1) the auxiliary verb, 2) the past participle of the main verb. The auxiliary verb will be...

Answered by Jessica M. French tutor
1603 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences