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A gold leaf electroscope with a zinc plate top is charged by briefly connecting it to the negative electrode of a high-voltage supply. Explain how the gold leaf will appear and how the leaf can be caused to drop again.

The gold leaf will diverge from the metal stem. This is because connecting the negative electrode to the zinc plate, causes an influx of electrons to flow into the electroscope. When the electrode is remo...

Answered by Rebecca N. • Physics tutor

4317 Views

Explain the importance of the cytoskeleton's role in providing mechanical strength to cells, aiding transport within cells and enabling movement of the cell.

The cytoskeleton is an internal framework within the cell made up of two different protein fibres: microfilaments and microtubules. It has a number of different functions including: providing mechanical s...

Answered by • Biology tutor

5026 Views

Sam is a bodybuilder. He currently weighs 90kg, but is aiming to be at 130kg in the next four months. Every month, he puts on 8% of his weight. Does he reach his target?

90kg x (1.08)^4= 122.44....No, he does not reach his target

Answered by ANGELICA S. • Maths tutor

2451 Views

Prove the square root of 2 is irrational

Explain proof by contradictionAssume sqrt(2) is rational i.e. can be expressed as the ratio of two integers: a/bUse algebraic steps to find this statement results in a contradictionirrationality proved by...

Answered by Joseph P. • Maths tutor

2656 Views

How can I improve my English to French translations?

Firstly, don't rush into translating anything straight away. You should have plenty of time to complete the translation, and it's much better to think openly about what could be some good transla...

Answered by Amelia S. • French tutor

1692 Views