Ablock is suspended from a scale and then lowered into a bucket of water. the density of the water is 1 gm/cm3. the initial reading on the scale is 19n and one complete revolution of the scale is a change of 10n. 1) when the block is lowered into the water, the mass of the block:

1.94 kg

Explanation:

we have given density of water = 1 gm/

the initial reading of the scale = 19 N

change in reading of scale =10 N

we have to find the mass of the block when the block is lowered in water

mass of the block when it is lowered in the water is given by

here g is the gravity of acceleration which value is given by 9.8

so the mass of the block =

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

this could be newton#'s law of cooling. the cooling curve is exponential