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In the heart there are 4 chambers; the upper 2 chambers are called the atria and the bottom two chambers are called the ventricles. The right and the left side of the heart are separated by the interventr...

That depends on whether there is light available. Plants are always respiring, day and night, as it provides them with the energy (in the form of ATP) required to survive. During the day however, when the...

^{Firstly rearrange the equation so that only dy/dx is on the left hand sidedy/dx = (x/(1+x^2)) tan(y)Now separate the variables such that the x terms are on one side with the dx,...}

Respiration uses 'food' in the form of glucose with oxygen to store (never create) energy in the form of ATP, along with CO2 and H2O. Photosynthesis uses energy from light with CO2 and H2O to create/store...

If 168 is four sevenths of a number then divide this by 4 to give 1 seventh of the number.
168/4 = 42
So 42 is one seventh of the number.
Now multiply this by 7 to find the number.
42*...