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What are the differences between plant and animal cells?

Animal and plant cells have some characteristics in common, as when life first evolved on earth, we shared a common ancestor. This was a long time ago: 1.6 Billion years!!!
This is w...

Answered by Caroline T. • Biology tutor

12605 Views

How would increasing the pressure of a system will have what effect on the equilibrium of this reversible reaction 3H2 + N2 <---> 2NH3?

Firstly, I would ask the student what they understand about Le Chateliers Principle. "If a system is at equilibrium and a change is made to the conditions, then the system responds to counteract the ...

Answered by Fatema D. • Chemistry tutor

10692 Views

Find the opposite length of the triangle with hypotenuse length 5 and adjacent length 4.

I would start off by asking them if they know the Pythagoras theorem. If they don't, I would refresh their memory and explain that its a²+b²=c² where...

Answered by Fatema D. • Maths tutor

3117 Views

How do I conjugate tener, ser, ir and hacer in the preterite tense in Spanish?

Tener, ser and hacer are all irregular verbs in the preterite tense.

Tener is conjugated using the stem tuv- to which different endings are added.

Yo tuve, tú tuv

Answered by Anna B. • Spanish tutor

19097 Views

How can I test to see if a sample a metal contains potassium?

The metals of group 1 (like potassium) can be identified by a flame test: A sample of the metal is placed in a bunsen flame, and the colour of the flame tells the metal.

Potassium placed in the fl...

Answered by Louis D. • Chemistry tutor

3452 Views