A boy opened two packets of milo drink. He left one in the refrigerator and another on the table. Three days later he got a bad smell from the packet left on the table. The packet which was kept in the refrigerator did not have a bad smell. What could be the reason for this?

1. the boy got bad smell from the opened packet left on the table due to rancidity.

2. the packet which was kept in the refrigerator did not have bad smell because they did not come in contact with oxygen.

Explanation:

rancidity - when fats and oils are oxidised they become rancid and their smell and taste changes.

when eatbles come in contact with oxygen they oxidised due to this we get bad smell and taste from it .

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.