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What are tariffs?

Tariffs are taxes on imported products. Governments impose them in order to discourage consumers from purchasing imported products and/or to raise revenue. Tariffs can be ad-valorem (% taxes) or specific (fi...
AH
12135 Views

Why is ATP required for skeletal muscle contraction?

When muscles contract, the length of the sarcomere (distance between the Z-lines*) shortens. ATP is required for the process of cross-bridge cycling which enables the sarcomere to shorten. The steps of cross...
SF
Answered by Surina F. • Biology tutor
39842 Views

Find the values of x, where 0 < x < 360, such that x solves the equation: 8(tan[x])^2 – 5(sec[x])^2 = 7 + 4sec[x]

This question tests a variety of mathematical techniques and knowledge which is integral to A-level mathematics. Note that the highest power of a variable function in the mentioned equation, is 2. It is ther...
OS
Answered by Osian S. • Maths tutor
21368 Views

Eleri invests £3700 for 3 years at 2% per annum compound interest. Calculate the value of her investment at the end of the 3 years. Give your answer correct to the nearest penny.

This question is a classic example of a problem which might catch some students out, if due care is not implemented. Eleri is investing £3700 at 2% per annum compound interest. This means that the sum of the...
OS
Answered by Osian S. • Maths tutor
7488 Views

If a person has a very poor diet they may have a very low concentration of proteins in the blood. This may cause oedema. Explain Why

Proteins are important to maintain the osmotic pressure within the blood vessels. Hence a person who has a poor diet that lacks protein will end up with swelling in their bodies this is called as oedema. Thi...
BZ
4565 Views