Small and large samples of gold foil, wire, and teflon coated wire (and gold alloy in wire form) can be purified.
Gold is usually alloyed in jewellery to give it more strength, and the term carat describes the amount of gold present (24 carats is pure gold)... Showed first 250 characters
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It is estimated that all the gold in the world, so far refined, could be placed in a single cube 60 ft. on a side. It is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple.
It is the most malleable and ductile metal; 1 ounce (28 g) of gold can be beaten out to 300 square feet... Showed next 250 characters
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Investigating the resistance of wire
For this investigation there are a number of variables that can be chosen to change or keep the same, these are:
· Length of the wire.
· Diameter of the wire...
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Physics Coursework Theory - Resistance of a Wire
Thickness (cross sectional area of the wire), length, and temperature all have some effect on the amount of resistance created in a wire. Another factor is the conductivity of the material we are using...
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Resistance of a Wire
In this piece of Coursework I am going to investigate the resistance in a piece of wire.
Resistance is the force that slows down the flow of electrons; this can be due to electrons colliding...
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Resistance of a wire investigation
Aim: To investigate the main problems with my main experiment and to see how to resolve these.
1. Setup Equipment
2. Make Circuit with the set length of wire
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Resistance of a wire
?Ammeter- measure the current of the circuit
?Voltmeter- to measure the voltage of the circuit
To record and measure the resistance I will use an Ammeter to measure the current in amps and a voltmeter to measure the voltage in volts...
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resistance of a wire
Apparatus: To do the investigation I will need different pieces of equipment. I will need: A power pack
5 wires ? covered in plastic with crocodile clips at one end
A long wire (approx...
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resitence of wire
I am going to be studying the resistance of wire. The purpose of this investigation is to see how the length of wire affect the dependent variable, resistance...