Question

The density of metal spoon when its weight in air is 0.48 N and in water is 0.42 N is

how to find ànd tell the formula for this​

Answer 1

Answer:

This can be answered if you can compute the volume of the spoon. This can be found from the mass of the volume of water displaced. And the volume of water is easy to figure since 1 liter is one kilogram.

The difference in weight is the weight of the displaced water, so that amount of water weights 0.06 Newtons. To convert to kilograms, use this:

1 kilogram has a weight of 9.8 Newtons (N) at the earth’s surface.

So the mass of the water W = 0.066N / (9.8 N / 1 kg) which gives the number of kilograms of water.

Now you have the mass of the water, which can be converted to kilograms which will give you the volume of the spoon in liters.

What’s the mass of the spoon? Just convert 0.48 N to kilograms as was done for the water, above.

Now you have the mass of the spoon in kg and the volume in liters, so you can compute kg/liter.

If you want another unit such as grams / cm3 or pounds / cubic foot, simply find the conversion factor and do the math.

(I’ll bet that the spoon is made of iron, or an iron alloy.)