Question

give reason for the following:
a. solids have fixed shape and volume .
b. air is dense at the sea level.

Answer 1

Hey!

A.
This because solids have strong molecular force of attraction.

B.
Air density, like air pressure, decreases with increasing altitude. It also changes with variation in temperature and humidity. At sea level and at 15 °C air has a density of approximately 1.225 kg/m3 (1.225 x10−3 g/cm3, 0.0023769 slug/(cu ft), 0.0765 lb/(cu ft)) according to ISA (International Standard Atmosphere).

Answer 2

Ans a) Solids have strong inteolecular forces operating between the molecules, which makes the molecules stay closer to each other abnd hence they have fixed shape and volume.
b)Air is dense at sea Level because of land breeze.