Question

A crown that is supposed to be made of solid gold is under suspicion. When the crown is weighed in air, it has a weight of 5.45 N. When it is suspended from a digital balance and lowered into water, its apparent weight is measured to be 5.17 N. What should the apparent weight w

gold
​
of the crown be, given that the specific gravity of gold is 19.3. w
gold
​
= Incortect Using the table, identify the most likely material of the suspicious crown. zinc gold

Answer 1

The apparent weight w of the gold crown is determined as 0.28 N.

The apparent weight w of the gold crown is calculated by applying the following formula as shown below;

Apparent weight = weight of gold crown in air - weight of gold crown in water

The given parameters include;

weight of gold crown in air = 5.45 N

weight of gold crown in water = 5.17 N

The apparent weight w of the gold crown is calculated as;

Apparent weight = weight of gold crown in air - weight of gold crown in water

Apparent weight = 5.45 N - 5.17 N

Apparent weight = 0.28 N

Answer 2

The apparent weight w of the gold crown is determined as 0.28 N.

How to calculate the apparent of the gold?

The apparent weight w of the gold crown is calculated by applying the following formula as shown below;

Apparent weight = weight of gold crown in air - weight of gold crown in water

The given parameters include;

weight of gold crown in air = 5.45 N

weight of gold crown in water = 5.17 N

The apparent weight w of the gold crown is calculated as;

Apparent weight = weight of gold crown in air - weight of gold crown in water

Apparent weight = 5.45 N - 5.17 N

Apparent weight = 0.28 N