Search our library of A Level questions

Top answers

All subjects

A Level

When is the -s pronounced at the end of "plus"?

Although "plus" is spelled the same whether the -s is pronounced or not, they are two different words.When the -s is pronounced, it means more. Eg: "Je veux plus de chats" mea...

Answered by David T. • French tutor

1876 Views

What are the main differences between RNA and DNA molecules?

When it comes to structure single strands of DNA and RNA are highly similar. However, there are few major differences which reflect the different functions of these molecules. Namely, DNA acts as a geneti...

Answered by Ted R. • Biology tutor

2991 Views

Explain the formation of a headland arch and its location above present day sea level.

Headland arches are formed when soft rock, for example sandstone occurs alternatively across a coastline, separated by bands of more resistant rock, such as gabbro. These different rock types experience d...

Answered by Joshua E. • Geography tutor

8472 Views

Integrate the function (3x+4)^2 using methods of expansion and substitution

For expansion:(3x+4)²=9x²+24x+16, go through expansion in online classroom. Now we integrate this using standard polynomial integration rules.
For substitution:
use the sub...

Answered by Morgan R. • Maths tutor

4106 Views

Find the tangent to the curve y = x^3 - 2x at the point (2, 4). Give your answer in the form ax + by + c = 0, where a, b and c are integers.

y = x³- 2xdy/dx = 3x²-2plugging in x = 2, therefore gradient = 10using the formula to get the equation of a line y -y₁=m(x - x₁)substitute y₁=4 and ...

Answered by Kevalee S. • Maths tutor

5964 Views