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Sum of moments in equilibrium must equal 0. The sum of clockwise moments must equal the sum of anticlockwise moments. W1 is the force exerted on the seesaw by the heavy person at distance D1 from the pivo...

Newton's second law of motion is F = ma and his law of gravitation is F= GMm/r^2.g is the acceleration of free fall and can be substituted for a, F = mg.We can therefore see that g = F/m and can use that ...

This quadratic equation is in the form ax^2+bx+c=0 (a=2, b=3, c=1), where there is a coefficient in front of X² term. First we have to multiply a and c. we then have to find two numbers z and y...

Lets use an example:Fe³⁺(aq) + e^- <==> Fe²⁺ (aq) E⁰ = +0.771 VLi⁺(aq) + e^- <==> Li(s) E⁰ = -3...