Top answers

What is dot product and how to calculate it?

There are two ways of multiplying vectors: one gives you another vector (cross product) and the other gives you a scalar- a number, like 3, 18 or 196 352. Hence, dot product is also called the scalar product...
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Answered by Filip W. • Maths tutor
9028 Views

If one proton is travelling through space at 0.3c, what is it's kinetic energy in MeV?

We know the formula for kinetic energy is KE = (1/2)mv 2 . If we know that c, the speed of light, is 3x10 8 ms -1 (you will be given this value in your Data & Formula books in the exam) and the proton is...
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Answered by Oisin B. • Physics tutor
7356 Views

Prove that the d(tan(x))/dx is equal to sec^2(x).

You can express tan(x) as sin(x)/cos(x). Therefore, tan(x)= sin(x)/ cos(x)The quotient rule can be applied here as there is a function of x in the numerator and denominator.Quotient Rule: (v*(du/dx) - u*(dv/...
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Answered by Chinazam U. • Maths tutor
19827 Views

What is anaerobic respiration?

Anaerobic respiration is the release of small amounts of energy in the cells by breaking down food substances in the absence of oxygen.
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Answered by Oisin B. • Biology tutor
3121 Views

Solve the equation 4x + 2 = -5x + 20

Algebra is the enemy of many a student, but I'm here to show you that this (and many more concepts in maths!) really aren't that bad. For this problem, we need to group all of the like terms together, that i...
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Answered by Ben J. • Maths tutor
6470 Views