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How do you know whether a verb takes avoir or être in the past tense?

Most verbs in French take 'avoir' in the past tense e.g. manger --> j'ai mangé. However, there are 14 verbs that take 'être' in the past tense and these can be remembered using the DR ...

TD
2499 Views

Light with a frequency of 200nm is shone on a sodium plate with a work function of 2.28eV and electrons start escaping the surface of the plate due to the photoelectric effect. What is the maximum kinetic energy of one of these electrons in eV?

The work function of a metal is the minimum amount of energy required for electrons to start escaping the surface. This means that if we calculate the energy of each photon from the light and subtract the...

RS
Answered by Robert S. Physics tutor
3748 Views

Describe how a a neurone communicates it's information with an adjacent neurone through the synapse? (3 marks)

Neurotransmitter is released from presynaptic neurone into the synaptic cleftDiffuses across the synapse Neurotransmitter binds onto postsynaptic membrane

SP
Answered by Sofia P. Biology tutor
2251 Views

(i) What is the net agin of ATP in Glycolysis? (2 marks) (ii) Where is ATP used in Glycolysis?( 1marks)

(i) In the breakdown of glucose 4 ATP is produced, however 2 ATP are used leaving a net gain of 2 ATP.(ii) In the energy investment stage, 2 ATP molecules are used to phosphorylate glucose into fructose d...

SP
Answered by Sofia P. Biology tutor
2603 Views

Describe the electrons in Benzene

delocalised pi electronslower e density than alkeneshalogen carrier is needed to generate more powerful electrophile so reaction can take place with benzene
draw benzene and resonance hybrids

IT
Answered by Imogen T. Chemistry tutor
1949 Views

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