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Explain the diffusion process of gas exchange in the lung during respiration

Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs. Blood travelling to the lungs is deoxygenated and instead of oxygen, carbon dioxide is bound to the red blood cells. Th...
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Answered by Calum R. • Biology tutor
14222 Views

Find the period of a wave given that it has a speed of 200m/s and a wavelength of 2m

The equation for finding the period of the wave is the reciprocal of the frequency hence th eperiod T =1/f substitute this into the wave speed equation v=f x lambda solve for f f = v/ lambda f= 200/ 2 f= 100...
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Answered by Zubaydah J. • Physics tutor
3686 Views

Why are transformers used in the National Grid?

The National Grid is how electricity is distributed from suppliers to consumers (commercial or private household). Power stations produce power in the region of Mega Watts (the order of millions of watts) an...
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Answered by Mike R. • Physics tutor
19501 Views

Nella mia città, ci sono due grandi problemi: 1)vicino a casa mia ci sono solo contenitori per la carta e il vetro. Non è possibile riciclare la plastica; 2)c’è molta gente che non lavora. La maggior parte dei disoccupati è giovane. What are the problems?

Possibilities are A homelessness B crime C air pollution D youth violence E unemployment F recycling First of all, I would ask if they know the meanings of the words. Then I would ask them to identify and un...
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Answered by Giovanni N. • Italian tutor
4054 Views

Rearrange y=(3x+5)/x to make x the subject

This question is asking us to make x the subject, so we’re aiming to end up with just x on its own on one side of the equation. Firstly, we need to get rid of the x on the bottom of the right-hand side, so t...
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Answered by Chloe K. • Maths tutor
8501 Views