1) what is air pressure? (4 points) 2) what is a barometer and what is it used to measure? (4 points) 3) how does air pressure change? (4 points) 4) why is cooler, drier air related to high pressure? (5 points) 5) why is warm, moister air related to low pressure? (5 points) 6) in a hypothetical city such as gotham city, the temperature is dropping and the skies are clearing. how would the barometer be changing? (4 points) 7) on another day in gotham city, the temperature is rising, the skies are getting cloudy, and some precipitation begins to fall. how would the barometer be changing? (4 points)

6.) The barometer would show a decrease in wind speed resulting in the dissipation of cloud cover because of the lack of wind, and also because the temperature is dropping there is less precipitation because there is no hot air rising to create clouds.

7.) If it is getting cloudy, it is because the air is rising. This is what causes the condensation of the moisture by adiabatic cooling of a lesser pressure aloft. If the air is rising, the pressure must fall. The barometer will show a lesser pressure. The temperature, on the other side, has very little to do with it.

Hai, how you a doin?

1)    What is air pressure? (Answer: Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth.)

2)    What is a barometer and what is it used to measure? ( A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather.)

3)    How does air pressure change?  ( Millibar values used in meteorology range from about 100 to 1050. At sea level, standard air pressure in millibars is 1013.2. Weather maps showing the pressure at the surface are drawn using millibars. ... This change in pressure is caused by changes in air density, and air density is related to temperature.)

4)    Why is cooler, drier air related to High Pressure? ( This is due to density differences between the two air masses. Since stronger high-pressure systems contain cooler or drier air, the air mass is denser and flows towards areas that are warm or moist, which are in the vicinity of low pressure areas in advance of their associated cold fronts.)

5)    Why is warm, moister air related to Low Pressure?  ( When air warms, its molecules scatter. The air becomes lighter and rises.)

part 1: the half-life of the element is 22 years.

part 2: it will take 132.02 year for the sample to decay from 308.0 g to 4.8125 g.

explanation:

part 1: there are two ways to determine the half life time.

first way: the half life time can be determined directly from its definition as it is the time required for the sample to decay to its half concentration.

from the data the initial concentration was 45.0 g and decayed to its half value (22.5 g) in 22.0 years.

second way: the radio active decay is considered first order reaction so we can use the laws of first order reactions.

k = (1/t) ln (a/a-x), where k is the rate constant of the reaction,

t is the time of the reaction

a is the initial concentration of the reactant

a-x is the remaining concentration at time (t)

a = 45.0 g the initial concentration at t = 0 year.

at t = 22 year, a-x = 22.5 g

then k = (1/22 year) ln (45.0 g/ 22.5 g) = 0.0315 year-1.

the half-life time (t1/2) = ln 2/ k = 0.693/ k =0.693/ 0.0315 = 22 years.

part 2:

using the same law k = (1/t) ln (a/a-x),

using the given data; a = 308.0 g and a-x = 4.8125 g and the calculated k from the part 1 (k = 0.0315 year-1)

t = (1/k) ln (a/a-x) = (1/0.0315) ln (308.0/ 4.8125) = 132.02 years

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.