https://padlet.com/lizad1/31nr9jd1191e Compare and contrast 5 every day machines based on their energy consumption en-us 2018-10-02 06:53:42 UTC 2025-04-26 13:23:57 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Carfront.png lizad1 https://padlet.com/lizad1/31nr9jd1191e/wish/287963876 Is it low, medium, or high efficiency and why?]]> 2018-10-02 06:56:42 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287963876 lizad1 https://padlet.com/lizad1/31nr9jd1191e/wish/287963994 How does the machine work you studied? How does it convert different energies to perform a job?]]> 2018-10-02 06:57:05 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287963994 lizad1 https://padlet.com/lizad1/31nr9jd1191e/wish/287964227 Add two photos to your column to show how it looks and how it works. ]]> 2018-10-02 06:57:53 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287964227 dia18434 https://padlet.com/lizad1/31nr9jd1191e/wish/287984043 A bicycle would be considered highly efficient, because it only wastes 10% of its energy due to the environment and uses 90% of its energy efficiently.]]> 2018-10-02 08:11:43 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984043 dia17326 https://padlet.com/lizad1/31nr9jd1191e/wish/287984056 Usually coal is burned to heat a boiler full of water. The steam then pushes the piston, releasing steam moving the slide value causing kinetic energy. This can be used to power water pumps or trains.]]> 2018-10-02 08:11:45 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984056 francesalessandrap https://padlet.com/lizad1/31nr9jd1191e/wish/287984131 Internal Combustion Engines would be considered of low efficiency, since it utilises a mere 25% of its original energy input.]]> 2018-10-02 08:11:55 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984131 francesalessandrap https://padlet.com/lizad1/31nr9jd1191e/wish/287984280 In many internal-combustion engines, a moving part known as a piston slides up and down in a cylinder. Most car engines have four to eight cylinders. Valves at the top of a cylinder let in fuel and air, and allow burned fuel to escape. Furthermore, at the top of the cylinder is a spark plug. The spark plug ignites, or sets fire to, the fuel.]]> 2018-10-02 08:12:15 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984280 dia15085 https://padlet.com/lizad1/31nr9jd1191e/wish/287984345 It is a highly efficient machine as 97% of all energy put in is used efficiently]]> 2018-10-02 08:12:30 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984345 dia17174 https://padlet.com/lizad1/31nr9jd1191e/wish/287984370 Human walking is considered to be a low efficient process as it utilizes 24% of the input energy to provide a useful function.]]> 2018-10-02 08:12:35 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984370 dia17174 https://padlet.com/lizad1/31nr9jd1191e/wish/287984531 2018-10-02 08:13:01 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984531 francesalessandrap https://padlet.com/lizad1/31nr9jd1191e/wish/287984611 Over 62 percent of the fuel's energy is lost in the internal combustion engine (ICE); ICE engines are very inefficient at converting the fuel's chemical energy to mechanical energy, losing energy to engine friction, pumping air into and out of the engine, and wasted heat.

]]> 2018-10-02 08:13:14 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984611 dia17322 https://padlet.com/lizad1/31nr9jd1191e/wish/287984792

]]> 2018-10-02 08:13:50 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984792 simranb https://padlet.com/lizad1/31nr9jd1191e/wish/287984824 Steam engines and turbines operate on the Rankin cycle which has a maximum efficiency of 63%.]]> 2018-10-02 08:13:56 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287984824 dia15085 https://padlet.com/lizad1/31nr9jd1191e/wish/287985009 An electromagnetic transformer follows the principle that a changing electric current can be used to create another electric current in the presence of a magnetic field. It does this by having a metal coil as an electro magnet with an AC current flowing through the input side and creating either a higher current, lower current, or the same current. This depends on the number of small metal coils around the main metal coil. If the amount of small metal coils on the input and output sides are the same, the current will also stay the same. If the amount of coils in the input side is higher, the current on the output side will be lower and vice versa. ]]> 2018-10-02 08:14:39 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287985009 dia18153 https://padlet.com/lizad1/31nr9jd1191e/wish/287985085 When the human releases thrust energy on the pedal, the chain of bicycle convert thrust energy mechanic energy and give it to wheels, and while wheel is turning, the mechanic energy convert to kinetic energy.]]> 2018-10-02 08:14:51 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287985085 dia18434 https://padlet.com/lizad1/31nr9jd1191e/wish/287985539

]]> 2018-10-02 08:16:06 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287985539 dia14270 https://padlet.com/lizad1/31nr9jd1191e/wish/287985642 Neuron signals sent from the brain tell the muscles to walk. The muscled contract or relax to move the legs in a walking motion. Th energy for walking is stored as fat within the cells then our red blood cells bring oxygen that we breathe in to the ells which breaks down the fat/carbohydrates and releases energy. That energy is used bu the muscle cells. Waste energy is released as lactic acid and heat. ]]> 2018-10-02 08:16:27 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287985642 dia17333 https://padlet.com/lizad1/31nr9jd1191e/wish/287985720

]]> 2018-10-02 08:16:42 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287985720 francesalessandrap https://padlet.com/lizad1/31nr9jd1191e/wish/287986140 How does the machine work?

Where is energy lost/utilised?

]]> 2018-10-02 08:18:03 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287986140 dia17002 https://padlet.com/lizad1/31nr9jd1191e/wish/287986272 Human walking is a low efficiency task, as the body has to do many tasks for movement. 24% of the energy is used to walk, and the other energy is used when the brain sends signals, when the body is cleaning the lactic acid, and the pumping of the heart takes
makes a lot of energy.]]> 2018-10-02 08:18:29 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287986272 dia15085 https://padlet.com/lizad1/31nr9jd1191e/wish/287986755 2018-10-02 08:19:49 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287986755 dia15085 https://padlet.com/lizad1/31nr9jd1191e/wish/287991313 2018-10-02 08:33:35 UTC https://padlet.com/lizad1/31nr9jd1191e/wish/287991313