The core of the earth lets out radiation from under the ground which make the core responce of how volcano's errupt.
The plastic jars of the air capacitor represent the parallel conducting plates.
<h3>What is Air capacitor?</h3>
Air capacitor is a type of capacitor that uses air as its dielectric. The simplest air capacitors will contain two conductive plates separated by an air gap.
This capacitor stores and releases electricity in the circuit using;
- air as the electrical source,
- balloon as the insulator and
- the plastic jar as the parallel conducting plates.
Thus, the plastic jars of the air capacitor represent the parallel conducting plates.
Learn more about air capacitor here: brainly.com/question/15755974
Answer:
a) The car was moving at a speed of 
b) The negative sign of 
denotes that the observer is coming towards the police car which is the source of the sound.
c) 
Explanation:
Given:
- original frequency of the source,
- speed of the source,
- velocity of the obstacle car be,
- speed of sound,
- observed frequency,
<u>Using the equation from the Doppler's effect:</u>
a)
The car was moving at a speed of
b)
The negative sign of denotes that the observer is coming towards the police car which is the source of the sound.
c)
Now when, 
Then, 
Using the Doppler's eq.:
They expend more oxygen. Littler endotherms lose warmth to the earth proportionately speedier than huge endotherms: less warm mass, protecting layers in littler creatures are less successful by dint of being more slender, and more prominent surface region to volume proportion implies snappier radiation of warmth
