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A system is in equilibrium when there is no resultant force and no resultant torque (or moment). A moment is the turning effect of applying a force on a body. It is the product of the force and the perpen...

There are a number of steps before sketching a graph. We will look over bits of theory and then do some examples (I'll show the examples in the online lesson space) First we have to find the x-intercept a...

Moment = force x distance

Pirate:

 force = 65 x 9.81 =637.65

distance = 1.2

moment = 637.65 x 1.6 =1020.24 = 1020 Nm (3 sig fig)

Parrot:

force = 1.1x 9.81 = 10.79...

Sodium chloride has a giant ionic lattice structure with ionic bonding. There are electrostatic forces of attraction between the Na⁺ ions and the Cl^- ions.

A surd is an irrational square root which cannot be reduced to a whole number when squared. When you think of the square root of 4, the answer is 2. When you think of the square root of 9, the answer is 3...