Material of density of 762 kg/m3 occupies a container volume of 99 cm3. What is its mass?
Hint: density = mass/volume

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 762 kg/m³

We must first convert the volume from cm³ to m³

So 99 cm³ will be

So the mass of the material is

We have the final answer as

Hope this helps you

75438 kg

Explanation:

c is the answer because when something is left after something evaporates that shows the chemical change.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.