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How do you know if you should use the perfect or imperfect tense?

Generally, the imperfect tense should be used for events which happened regularly in the past or which took place over a period of time. The perfect tense is used more for one off events. So for example, if ...
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Answered by Leah T. • French tutor
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What are receptors?

Receptors are a group of specialised cells that are used by the body to detect different stimuli (changes in the environment). Receptors are most common in sensory organs like the eyes, ears and the skin. Ad...
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Answered by Kirsty S. • Biology tutor
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Write a letter to a friend on the topic of healthy eating

The letter should include a introductory statement addressing the friend. It should say why/how the topic of the letter was thought of and why it could/does concern the addressee. The letter could include th...
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Answered by Andrea S. • Spanish tutor
16850 Views

What is the tonality and harmony of Chopin's 'Raindrop' Prelude No.15 Op.28?

Tonality: Tonic key: Db major in Section A. Modulation to C# minor, the enharmonic tonic minor, in Section B. Repeat of Section A, Db major. Harmony: Mainly diatonic, with some/occasional chromaticism Use of...
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Answered by Jodie B. • Music tutor
7005 Views

An electric heater has a power of 1000W. It is connected to mains electricity (230V). The heater is equipped with an Earth wire. a) Calculate the current in the heater. b) Explain the role of the earth wire as a safety feature.

a) Use the equation P=IV where P is power in W, I is Current in Amps and V is voltage in volts. Rearrange to give I=P/V I=1000/230 = 4.34 A b) This is a wire connected to the metal casing of an electrical ap...
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Answered by Katie S. • Physics tutor
16551 Views