The density of a certain type of plastic is 0.80g/cm. If a sheet of this plastic is 10.0 m long, 1.0 m wide, and 1 cm thick, what is its mass? Enter your answer in scientific notation.

m = 8.0×10⁴ g

Explanation:

Given data:

Density of plastic = 0.80 g/cm³

Dimensions of plastic sheet = 1.0 m × 10.0 m ×1 cm

Mass of sheet = ?

Solution:

First of all we will convert the length and width into cm.

length = 10.0 ×100 = 1000 cm

width = 1.0 ×100 = 100 cm

Volume = 1000 cm × 100 cm × 1 cm

Volume = 100000 cm³

Mass of sheet:

D = m/v

0.80 g/cm³ = m / 100000 cm³

m = 0.80 g/cm³ × 100000 cm³

m = 80,000 g

m = 8.0×10⁴ g

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.

2b2t

explanation:

2b2t