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When you have two parametric equations what's the name of the rule you can use to work out dy by dx?
The chain rule.
What is the difference between a tacheometer and a theodolite?
A tacheometer is a type of theodolite used for rapid measurements. It determines the distance to the target electronically or electro-optically. Tacheometry is a system of rapid surveying that does not use chain or tape. There are times when measuring with a theodolite and measuring tape can be dangerous or impossible.A theodolite is an older surveying tool. Those were just precision optical devices used to compute angles between known fixed points, and they required using trigonometry to get the final values. However, there are modern versions of theodolites called Total Stations that are more convenient to use than even a tacheometer. These will cost you about $50,000 a piece or so.Please note that the question asks about a tacheometer (or tachymeter) which is a surveying tool, not a tachometer which measures engine speed.
What to use to measure mm of a gold chain?
To measure the mm of an item you would need to use a metric ruler. The metric ruler has cm and mm on it.
How much chain and rope would you need for a 7.5kg Bruce anchor?
It depends on how deep the water is you are anchoring in. If you use all chain then multiply the depth by 3 and add enough extra chain to reach from the water surface to your cleat. If you use all rope then multiply the depth by 5 and add enough rope to reach from the water to your cleat.
What would you use to measure the weight of a watermelon?
A bathroom scale would work
