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What is an ionic bond?

An ionic bond is the electrostatic force of attraction between two or more oppositely charged ions , formed by the transfer of electrons .
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Answered by Gunchit S. • Chemistry tutor
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John runs a sandwich shop in his local village and has 4 employees. Which of the following represents a variable cost to John? i) Insurance of the shop ii) Wages paid to his employees iii) Rent to the landlord iv) Gas due to heating

A variable cost is a cost to a business or individual which changes with respect to the amount of output whilst a fixed cost is one that will remain constant, irrespective of the amount of output by the indi...
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A car horn has a frequency of 680 Hz and a wavelength of 50cm. Calculate the speed of the sound waves produced by the car horn:

velocity (v) = frequency of the wave (f) x wavelength of wave (in metres) (λ) 50cm in metres: 50/100 = 0.5m Therefore (v) = 680 x 0.5= 340 (m/s)
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Answered by Gunchit S. • Physics tutor
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What was the reason for the British attack at the Somme? (Example of 4 mark question)

The Battle of the Somme in 1916 is known as one of the most bloody battles that Britain has participated in, with estimates that over one million soldiers had died by its conclusion in November.The primary r...
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Answered by Cameron F. • History tutor
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Draw the graph y=tanx in the region -180 degrees =< x =< 180 degrees

This answer would be best shown using a diagram. However you must ensure that the graph crosses the x axis at -180, 0 and 180 degrees. Moreover it is also necessary that the student has included asymptotes w...
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Answered by Jack J. • Maths tutor
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