Top answers

Resistance to antibiotics is caused by a mutation. What is a mutation?

A change in the DNA base sequence resulting in a different protein structure.
EB
4905 Views

In most transformers, why is the power output is less than the power input.

As some energy is lost as heat/sound meaning the transformer is not 100% efficient
EB
Answered by Ethan B. • Physics tutor
7379 Views

Explain why an atom has no overall charge

As the number of negatively charged electrons is equal to the number of positively charged protons, therefore the overall charge is zero
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Answered by Ethan B. • Chemistry tutor
3606 Views

Why is Odysseus a feminine hero?

Odysseus is a feminine hero due to the way he uses duplicity, lies and disguise rather than brute force in order to return home to Ithaca (also known as a 'nostos' - a journey with the goal returning home). ...
ET
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A tank contains 45 000 cm3 of water. The tank leaks at 0.75 litres/minute. How long does the tank take to empty?

The first thing to notice with this question is that the volume of the tank is given in cm 3 yet the rate at which the water leaks is in litres, so a conversion of units will be neccessary. We know that ther...
TG
Answered by Tom G. • Maths tutor
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