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Showing posts with label 9Hur3 Term 3. Show all posts
Showing posts with label 9Hur3 Term 3. Show all posts

Tuesday, September 28, 2021

Electricity Series and Parallel circuit





What is the difference between a series and parallel circuit?
On a series circuit, the electrons go on the same path and the parallel branches off on different paths. 

What is voltage and current in a circuit?
The voltage is how much energy flows in the circuit and the current is how much fast the electrons move.

Explain why a string of Christmas tree lights would be parallel not series.
Because there are multiple pathways for the electrons to travel on and if one of them is broken the whole thing wouldn't be affected because it's not a series circuit. 

Monday, September 27, 2021

Static & Current electricity

Static Electricity

 -What are the 3 particles that make up everything? Which ones have a positive and negative charge?

They are Proton, Neutron and Electron. Proton has a positive charge while Electron has a negative charge.

-Objects want to be "electrically neutral", What does that mean?

It is when there is an equal amount of Proton and Electron. 

-When you rub two insulators you can get a static shock.

It passes the Electron to you.

-What is an example of static electricity?

When you rub a balloon on your head.  

Current Electricity

-What is the particle that moves in a wire? 

They are called electrons.

-If there is a high current in a circuit what does this mean? 

There is a high voltage. 

-How does electricity work to heat up a stove

It converts electric energy into heat energy. 

-Where is DC electricity used? Where is AC electricity used?

DC can be used for charging batteries, aircraft etc. 

AC is used to power homes, businesses and lightbulbs. 



Tuesday, July 27, 2021

Convection & Conduction

 Hurumanu 3- Chemicals and Chaos 

Convection and Conduction are both types of heat transfer, it is when energy is passed from cold to hot. It is about passing on heat.

When something heats up the particles move faster and faster so when they bump into each other they transfer heat because they are being in contact.

Conduction- it passes the heat energy through contact.  Good thermal conductor- can pass on heat. eg. stovetops and kettles 

Thermal insulator- does not pass on heat. (bad conductor for when you want heat) eg. house insolation and thermals. Thermal insulator traps heat in because they don't conduct heat. 

A good thermal conductor can be a good and bad thing as well as a bad conductor. 

Convection- It is when heat energy is transferred without needing to be touched, it is usually in liquid. eg heaters and hot air balloons  

The process continues eventually the whole liquid would get heated up. the process is called Convection Currents 

- Hot stuff rises, cold stuff sinks 

Teabag rocket 

When we lit the teabag on fire the particles spread out and were less dense making the teabag go up because it is light. When the ashes reach the top it becomes cold and the particles become compacted, denser and heavy, making them come back down.