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Difference between the verb ser and estar

Estar is used for States of BeingEmotional, physical & mental states of (our bodies') being:Feelings/moods/emotions, physical conditions or appearances, civil state (married, single, divorced...

Answered by Stefan Z. • Spanish tutor

1621 Views

OPG is a triangle. N is point on OG such that ON : NG = 2 : 3. OP = a, PG = b. Express ON in terms of A and B.

We would first like to find an expression for OG. We know that OG can be expressed as OG = OP + PG. Therefore OG = a + b Knowing the ratio ON:NG is 2 : 3, we can conclude that ON is (2/5)th of OGTherefore...

Answered by Rowan M. • Maths tutor

2782 Views

How and why does a geostationary satellite stay above the same point on the Earths surface?

First I think it is useful to look at the definition of a geostationary satellite to find out why it appears to stay in the same place above the earths surface. It is an object that is above the equator, ...

Answered by Tim S. • Physics tutor

1985 Views

Explain how changes in temperature and pH affect the rate of an enzyme-catalysed reaction. Give appropriate diagrams to illustrate your answer. [6]

At the optimum temperature for a given enzyme (specific to each enzyme dependent on the composition of the protein), catalytic activity is at a maximum and hence the reaction proceeds at maximum rate. Bot...

Answered by Jasper L. • Biology tutor

3617 Views

Explain how glucose is made during photosynthesis and how it is utilised by the plant.

During photosynthesis, green plants use carbon dioxyde and water, and with light energy convert them to glucose and oxygen. There are two phases of this process, the light-dependent phase which needs the ...

Answered by Anna S. • Biology tutor

14948 Views