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How do you know when to use a relative pronoun, and which one do you use?

A relative pronoun comes almost always at the beginning of a relative clause. That's usually when you want to give extra detail about an object in your sentence. In English, this would be something along the...
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Answered by Matthew C. • German tutor
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Describe the cardiac cycle (7 marks)

During diastole the atria and ventricles are relaxed. The atrioventricular valves are open and the semilunar valves are closed. Deoxygenated blood enters the right atrium from the venae cavae and oxygenated ...
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Answered by Tara S. • Biology tutor
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Calculate the acceleration if a force of 500N is exerted on a mass of 20kg

Using F=Ma, rearrage for a, a= 500/20, the acceleration is 25m/s 2
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Answered by Patrick L. • Physics tutor
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A stationary unstable neutral particle decays into 2 separate particles with equal mass and velocity, what might the resulting bubble chamber diagram look like?

The two decayed particles will form identical spirals but in the opposite direction to one another, as they will have to be oppositely charged to preserve the overall charge. The spiral patterns will be iden...
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Answered by Patrick L. • Physics tutor
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What is produced when Sodium Carbonate reacts with Hydrochloric Acid

Since any metal carbonate reacts with any acid to produce a salt and water and carbon dioxide, the resulting product from that specific reaction will be sodium chloride , water and carbon dioxide .
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Answered by Patrick L. • Chemistry tutor
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