Search our library of homework questions

Top answers

All subjects

All levels

Quand utiliser tu et quand utiliser vous ?

Pour une personne de moins de 18 ans environ, il faut utiliser tu pour quelqu'un de son âge, de 18 ans ou moins, pour sa famille ou ses amis. Vous est reservé à toutes les autres personnes : professeur...

Answered by Judith Z. • French tutor

2642 Views

Do batteries contain current, which comes out when they are in a circuit?

No; this is a common misconception! Batteries store energy, which is used to push electrons (charges) around a circuit. The flow of electrons is called current. As the electrons flow through the circui...

Answered by Samuel S. • Physics tutor

3315 Views

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 prod...

Answered by Filip W. • Maths tutor

7143 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)mv².

If we know that c, the speed of light, is 3x10⁸ms^-1 (you will be given this value i...

Answered by Oisin B. • Physics tutor

5934 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*(...

Answered by Chinazam U. • Maths tutor

18135 Views