Alveoli are tiny sacs of air in the lungs. Their average diameter is 4.50 × 10−5 m. Calculate the uncertainty in the velocity of an oxygen molecule (5.30 × 10−26 kg) trapped within a sac. Enter your answer in scientific notation.

The uncertainty in the velocity of oxygen molecule is

Explanation:

The diameter of the molecule will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

where,

= uncertainty in position = d =

= uncertainty in momentum  =

m = mass of oxygen molecule =

h = Planck's constant =

Putting values in above equation, we get:

Hence, the uncertainty in the velocity of oxygen molecule is

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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