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If 10 N is required to move an object 2m, what is the work done?

Work done (joules) = Force (newtons) x distance moved in direction of the force (metres) Work done = 10 x 2 = 20J
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Answered by Katrina T. • Physics tutor
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What conditions increase the likelihood of fossilisation?

Cold and low oxygen - minimises likelihood of organisms decaying
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Answered by Katrina T. • Biology tutor
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2.4 g of magnesium reacts with 1.6 g of oxygen. What is the empirical formula of the oxide formed?

Ar of Magnesium = 24; Ar of Oxygen = 16 number of moles = mass divided by Ar number of moles of Mg = 2.4/24 = 0.1 number of moles of Oxgen = 1.6/16 = 0.1 ratio of Mg to O = 0.1:0.1 = 1:1 So oxide produced is...
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Answered by Katrina T. • Chemistry tutor
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How do you analyse a source?

Analysing a source is a challenge, particularly when you'll probably be doing this analysing in the stressed environment you'll get in an exam. Though by using the same kind of formula to apply to any source...
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Answered by Luke M. • History tutor
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How can you stop a cell culture from becoming contaminated?

Sterilising petri dishes and agar before use. Taping lid of petri dish whilst microbes are glowing. Sterilising innoculating loops before use.Carry out experiment near bunsen burner for updraft.
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Answered by Iona H. • Biology tutor
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