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Why is the car moving if the unbalanced force is zero?

This is a great example of where physics and our gut feelings about physics don't match up. This is a very common conceptional difficulty students have and is often jumped on by examiners. The best way to th...
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Answered by Connor D. • Physics tutor
19658 Views

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
2863 Views

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
16412 Views

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
16714 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
6831 Views