3.
One end of a ladder of length 5m slides down a vertical wall. When the upper end of the ladder is
3m above the ground, it has a downwards velocity of 0.5m/s. Find the rate at which the angle of
elevation (from floor to top of ladder) is changing at that time.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

The answer is 16.64 feetyour welcome

The american colonies would have been ruled by a king.