A friend wants to know whether her wedding ring is made of pure gold or of a mixture of gold and silver. a)Describe an investigation to answer her question.

b)Explain what is likely to be the most significant source of error in your answer.

The density of gold is 19.3g/cm and the density of silver is 10.5g/cm

a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be?

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the most reliable source of information.is wikipedia

explanation:

wheres the pic

80cm/s.

24cm/s.

53.3cm/s.