Question

describe an experiment to determine the density of the material of a coin

Answer 1

Measuring density is one way for telling what metal a coin is made of. A coin density is the ratio between the coin's weight and the weight of the same volume of water. Density is specific of the metal. This density way better works for pure metals (silver, gold, zinc...) and for heavier coins. Regarding silver coins, the density method can tell the fineness.

EquipmentDensity measurement requires:
a precision scale (0.01 g)a glass filled with watera paper clipa piece of string, 10 to 20 cm long
DirectionsWeight the coin and write down its weight [1].Tie the string to the paper clip.Put the glass of water on the scale.Put the clip fully under water while suspended to the string. Make sure the clip makes no direct contact with the glass.Set the scale tare (set it to 0).Put the coin in the clip. If the coin is too large, bend the clip and set the coin on top of it.Put the coin and clip fully under water. Make sure they make no direct contact with the glass.Write down the new weight displayed on the scale [2].

Answer 2

Answer:We have to just take an imaginary amounts and place it in the place of volume and mass and calculate the density.

Explanation:

We have to take a surela can.Place the Ureka Can on its spout.Pour water into the can until it starts overflowing through the spout. When the water has stopped dripping,remove the measuring cylinder . Empty it, dry it and again place it under the spout Now tie the coin by a thread . Immerse the coin gently into the water contained in the ureka can . The coin displaces water equal to it'd own volume which overflows through the spout,note the volume of water collected in the measuring cylinder.Dry the solid.Measure the mass M of the given coin with the beam balance.

Let the mass of coin-310g,

Volume of coin- volume of water collected in the measuring cylinder - 40 cm^3.

Density- MassM/VolumeV

=310g/40cm^3 = 7.75gcm^3