Which of the following regarding atmospheric pressure is true?

air pressure at sea level is approximately 1013.2 mb.
the tropopause serves as a buffer against the pressure exerted by the atmosphere.
while the atmosphere exerts pressure, it is a negligible amount.
atmospheric pressure increases with altitude and is, therefore, lowest near the earth's surface.
atmospheric pressure is greatest in the mesosphere.
# 2)

which of the following regarding the dimensions of the known universe, the milky way, and our solar system is not true?

earth is closest to the sun during the month of june.
on average, the moon is 384,000 km (238,866 mi) from earth.
on average, the sun is approximately 150 million km (93 million mi) from earth.
which of the following regarding the dimensions of the known universe, the milky way, and our solar system is not true?
the known universe stretches approximately 12 billion light years in all directions.

1- Option (A)

2- Option (A)

Explanation:

The pressure is often defined as the force per unit area. In the atmosphere, the pressure is maximum at the troposphere and is tightly packed near the ground surface. The troposphere is the region where the temperature decreases with the increasing height. The atmospheric pressure at sea level is nearly 1013.2 millibar (mb). The difference in the pressure in this layer causes the wind that is responsible for the occurrence of different types of weather patterns.

The earth and the sun maintains the shortest distance at its Perihelion position, which takes place in the month of January during the winter season in the northern hemisphere. And on the other hand, the earth is far away from the sun at its Aphelion position that takes place in the month of July.

Hence, the correct answers are given above.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa