Thermal energy has a main concept called Equilibrium. Choose an option below that best explains how thermal equilibrium is demonstrated. 1 The man in the video had a lot of layers on and then he took off his jacket to show how much heat he had and compare himself to the environment
2The hand prints are on his chest because he was unable to maintain his personal equilibrium and therefore continued to suffer through the cold weather
3In the beginning he was hot, but you could not see it because of his jacket. When he took his jacket off you could still see that his hair was acting like an insulator, much like the fur of a polar bear working to maintain his head heat and not let his internal organs begin to shut down
4As time went on the temperature of his skin was decreasing because his body started at a higher temperature than the air around him and continued to share energy until all molecules would be balanced

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

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

the dissolution of polymer can be thermodynamically described in 2 steps.