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The term 'provisional sum' is generally well understood in the construction industry. It is used in construction contracts to refer either to work which may or may not be carried out at all, or to work whose content is undefined. In either case, the parties will not attempt to price it accurately when they enter into their contract. Instead, the provisional sum is usually included within the contract price as an approximate guess. The contract normally provides expressly how it is to be dealt with. A common clause provides for the provisional sum to be omitted and an appropriate valuation of the work actually carried out substituted for it.
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What is PWPS in welding?
provisional welding procedure specification
What happens to voltage and current in series circuits?
Kirchoff's voltage law states that the signed sums of the voltage drops in a series circuit add up to zero.Kirchoff's current law states that the current everywhere in a series circuit is the same, more specifically, that the signed sums of the currents entering a node is zero.
What happens when resistors are interconnected in a circuit?
The net resistance can be found out using the algebraic sums f series and parallel connections. When there is no current flowing in the circuit the net resistance is infinite.
What did David Unaipon invent?
Unaipon took out provisional patents for 19 inventions but was unable to afford to get any of his inventions fully patented. His most successful invention (provisional patent 15 624), a shearing machine that converted curvilineal motion into the straight line movement which is the basis of modern mechanical shears, was introduced without Unaipon receiving any financial return and, apart from a 1910 newspaper report acknowledging him as the inventor, he received no credit. Other inventions included a centrifugal motor, a multi-radial wheel and a mechanical propulsion device.
Why do people become engineers?
I became an engineer because I was good at sums, hating writing, and did not like the idea of spending my whole working life trapped indoors, shuffling papers, and shuffling from office to office with a piece of paper in my hands.
