Top answers

This section was completed before the interview

This section was completed before the interview
MA
Answered by Marta A. • History tutor
2141 Views

Explain how chromatography is used to separate components in a mixture.

Chromatography separates components in a mixture according to their solubility in the mobile phase and their adsobance to the stationary phase. The mobile phase is the part of the chromatography set up that ...
IC
Answered by Immy C. • Chemistry tutor
21923 Views

GSCE: How is a delta formed? (5 marks)

A delta is formed in the lower course of a river when the river reaches the sea, or another still body or water such as a large lake. The river slows down and loses energy as there is now no limiting chanel ...
CB
Answered by Caitlin B. • Geography tutor
20269 Views

Explain why the price elasticity of demand for two products may vary.

Price elasticity depends on several other components: Availability of substitutes The proportion of a consumer's disposable income which the products account for Whether the products are addictive (consumers...
TB
Answered by Thomas B. • Economics tutor
3109 Views

How do I integrate ln(x), using integration by parts?

This is a common question among A-Level Maths students, as integration by parts requires 2 things: 1. Something to integrate ; 2. Something to differentiate. In ln(x), we can immediately see that ln(x) is th...
MK
Answered by Mustafa K. • Maths tutor
4160 Views