Answer:
they send electrical signals to the buzzer. The buzzer changes those electrical signals into sound. You hear the buzzer sound and know that someone is calling you.
Explanation:
We use analog and digital signals in our everyday lives with the radio, the cell phone and with our own computers. our computers and our cell phones are all digital now but radio's are still considered analog. Radio telescopes explore space by using radio waves and signals to almost like scan space and collect data like a sonar in a submarine.
I’m not sure but I think it belongings.
The below displays ice-creams with its associated flavours. This we would display using <UL>
• Stick
o Chocobar
o Feast
• Bowl
o Butterscotch
o Blueberry
<UL>
<LI>Stick
<UL>
<LI>Chocobar </LI>
<LI> feast</LI>
</UL>
</LI>
<LI>Bowl
<UL>
<LI> Butterscotch </LI>
<LI> Blueberry </LI>
</UL>
</LI>
</UL>
Here <UL> tag is used to create un ordered list and one another <UL> tag inside <LI> created nested list which is the actual requirement. Like this we can created nested unordered lists and you can nest upto 4 levels and increasing the number of levels further may reduce clarity.
