Remake of Class exercise by Gavin Earnshaw https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge flow diagram exercise en-us 2019-01-30 14:43:20 UTC 2026-01-29 16:15:09 UTC hello@padlet.com Write in you own words how the wonders of innovation work earnshawgavinjohn5 https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325851499 2019-01-30 14:44:42 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325851499 How does a special work? https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325859629 There is an electromagnetic coil, which is a metal coil which creates a magnetic field when an electric current flows through it. This converts the electrical signal into sound energy.
Inside the speaker, an electromagnet is placed in front of another magnet. The other magnet is fixed into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This means that it is in turn attracted and repelled from the fixed magnet, vibrating back and forth. 
The electromagnet is attached to a cone made of flexible material such as plastic]]> 2019-01-30 14:59:03 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325859629 How does a car engine work? https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860099 An internal combustion engine is an engine where fuel and air combust inside the engine to create the energy to turn the wheels. An internal combustion engine works by repeating 4 strokes over and over and over (and over).
1: Intake. The momentum of the crankshaft pulls the piston down. As this happens the inlet valve opens and a mixture of fuel and air is sucked into the cylinder
2: Compression. The piston moves back up the cylinder and compresses the air/fuel mixture.
3: Power. The spark plug fires and ignites the air/fuel mixture, forcing the piston back down.
4: Exhaust. The outlet valve opens and the piston comes back up the cylinder and pushes the burnt mixture out of the cylinder.
This process is repeated
The camshafts are constantly rotating and they control the opening and closing of the inlet/outlet valves.
A problem with this is that the crankshaft is only being powered on 1/4 of the engine strokes. A solution to this problem is to have multiple cylinders which power the crankshaft at different times. This means that the crankshaft is always being powered by at least one of the cylinders, resulting in no loss in power.
A four cylinder engine means that there are 4 cylinders in a straight line. A V8 engine means that there are 8 cylinders arranged in the shape of a "V".
]]> 2019-01-30 15:00:01 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860099 Four-stroke engine. https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860229 A four-stroke car engine burns petrol in a combustion chamber, using the expansion of the waste gasses to drive a crankshaft, which drives the wheels. Some energy is taken by the alternator to be converted into electrical energy to be stored by the car battery so that the car can use this energy to start the engine when it is turned off. The crankshaft in addition drives several mechanism in order to keep the engine working at optimum performance for longer.
Mechanisms like the water pump, which keeps the cylinder head from melting, the camshaft which keeps the whole thing in time, and the gearbox, which changes the speed and torque to the needs of the driver. 
In short though, the fuel drives a rod which turns the wheels.]]> 2019-01-30 15:00:15 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860229 how does a speaker work? https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860272 there is a cone made from paper with something magnetic in the centre of it. behind that there is an electromagnet (a magnet wich can be turned off and on with electricity) which can be turned on and off rapidly. this makes the centre of the cone go back and fourth which compresses he air, making a sound wave.    ]]> 2019-01-30 15:00:19 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860272 How does a TFT monitor work? https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860298 Thin film transistor( or TFT monitor), uses simple chemical and electrical properties to create a visible image on a monitor. It uses a panel with many pixels which can individually emit any colour. It does this by using an electrical charge, which causes the liquid crystals to change their structure and allow varying wavelengths of light to "pass through" and therefore appearing on the monitor. Because of this the TFT display changes rapidly, depending on the incoming signal from the control device. Then the TFT panel uses several layers of filters, sandwiched between two glass panels. Two polarized filters, colour filters and two alignment layers determine exactly how much light and what frequency of light is being created.]]> 2019-01-30 15:00:22 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325860298 hair dryer https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325862733 The fans in a hairdryer are powered by a motor which speed can be controlled by a switch.The heating coil is made 
of nickle-chromium alloy wire which has a high resistance and does not oxidize under high temperatures. When electricity
is sent across the wire, it converts it into heat energy thereby heating up the air flowing trough. The heating element
can be switched so the dryer can blow air at room temperature.]]> 2019-01-30 15:05:07 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325862733 How Does a Washing Machine Work? https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325865511 So, basically,  for the inner drum, which is the bit that you actually see spin, there's a motor connected to a belt which turns the inner drum back and forth, sloshing the water & your clothes. The outer drum, which you can't see, holds the water and soap, and is also where the water drains out when it's on the spin cycle]]> 2019-01-30 15:09:55 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325865511 https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325870037 the motor is in the handle and pushes the air into the cylinder which causes to spin  out

]]> 2019-01-30 15:17:00 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325870037 https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325870755  
Car Engine 

Regular car engines have pistons. I will explain how a four stroke petrol engine works. 

Pistons are connected to a Con-rod (short for connecting rod) which is then connected to the crankshaft. As the crankshaft turns, the con-rod goes round in circles, making the piston move up and down. 

The fuel and air get mixed together in a carburettor. 

Stroke 1. As the piston goes down, the intake valve opens, letting in the mixture of air and fuel. 

Stroke 2. The valve closes then the piston travels upwards, compressing the fuel. 

Stroke 3. There is a spark plug at the top of the cylinder which sets of a spark, causing mini explosions to go off, increasing the pressure. This then forces the piston back down. This is how the energy is produced. 

Stroke 4. The Exhaust valve opens and the piston travels back up the cylinder, letting out the combusted air. 

]]> 2019-01-30 15:18:13 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325870755 Dyson blade less hair dryer https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325886491 blades hidden in the handle take in air. the air rotates an electric motor and then the air comes out the head at 16 degree angle in a cylinder shape]]> 2019-01-30 15:44:38 UTC https://padlet.com/earnshawgavinjohn5/77z4pefyl6ge/wish/325886491