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Skew lines in 3 dimensions are those which are not parallel and do not intersect.

Let's take two example lines: l₁ = (2, 2, -1) + λ(3, 1, -3) and l₂ = (1, 0, 1) + µ(...

We need two numbers, a and b, such that a*b = 2 and a+b=3Looking at the equation it can be seen that 2 and 1 fulfill these conditions.Therefore x² +3x +2=0        = (x+2)(x+1)=0This means we ne...

A.C. stands for alternating current, and the current constantly changes direction. D.C. stands for direct current, and the current only flows in one direction.

Use the equation p= m x v , where p=momentum m=mass (kg) and v=velocity (m/s)p= 84x5 = 420 kg m/s

Use the equation mass(g) = moles x MrThe moles are given in the question, moles= 0.1 molLook at a periodic table to work out the Mr of CaCO3: Ca= 40 C= 12 O= 16 Therefore Mr= 40+12+(16x3)           = 100S...