Anoisy toy is placed in a glass jar all the air is then slowly removed from the jar how does this affect the sound you hear

Sound is a mechanical wave, this means that it needs a medium in order to propagate.

If you put the toy inside a jar and you remove the air, then the sound of the toy will not have the air to travel. In another side, if the toy is touching the bottom of the jar, then the sound that the toy is making can travel along the same toy and then be transmitted to the jar that is being touched and the jar will transmit the sound to the air surrounding it.

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."