A plate of area 10 `cm^(2)` is to be electroplated with copper ( density 9 g `cm^(-3)`) to a thickness of 0.001 cm on both sides using a battery of 12 V. Calculate the energy spent by the cell in the process of deposition. If the energy is used to heat 100 g of water, calculate the rise in temperature of water. ECE of copper `=0.0003 g C^(-1)`.

A plate of area 10 cm^2 is to be electroplated with copper (density 9000 kg m^(-3) to a thickness of 10 micrometres on both sides, using a cell of 12 V . Calculate the energy spend by the cell in the process of deposition. If this energy is used to heat 100 g of water, calculate the rise in the temperature of the water. ECE of copper = 3 xx 10^(-7) kg C^(-1) and specific heat capacity of water = 4200 J kg^(-1) K^(-1) .

A copper voltameter and an ammeter are connected in series with a battery through a resistance In 50 minutes 0.99 g Copper is deposit on the plates the ammeter reasds 0.95 A Calculate the error inits reading ECE of copper is 0.0003g C^(-1)

A brass plate having surface area 200 cm^2 on one side is electroplated with 0.10 mm thick silver layers on both sides using a 15 A current. Find the time taken to do the job. The specific gravity of silver is 10.5 and its atomic weight is 107.9 g mol^(-1)

An object of mass 60g has a volume of 10cm^(3) . Calculate the density of the object. If the density of water be g//cm^(3) , state whether the object will float or sink in water.