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A machine has an effciency of 91 percent if the energy is supplied to the machine is 4000 watts what is the amount being used for work?
The efficiency of a machine is given by the ratio of useful work output to the energy input. Therefore, if the machine has an efficiency of 91%, the amount being used for work would be 91% of the energy input. In this case, if the energy supplied is 4000 watts, the amount being used for work would be 0.91 * 4000 = 3640 watts.
Is the efficiency of a machine is 60 the percentage of work input used to overcome friction?
No, efficiency of a machine is a measure of how well input energy is converted into useful output work, and is calculated as useful work output divided by total work input. The percentage of work input used to overcome friction would be related to the frictional losses in the machine, not the overall efficiency.
When a machine is used to perform a task work output is always more than work input.?
This statement is not always true. In reality, some energy is lost in the form of heat, sound, or friction while a machine is being used, meaning that the work output is often less than the work input due to energy losses within the system. This concept is known as efficiency, and it is a measure of how well a machine can convert input energy into useful output energy.
What is a mechanical Effeciency?
Mechanical efficiency is a measure of how well a machine converts input energy into useful output energy. It is calculated by dividing the actual output power of the machine by the input power and multiplying by 100% to get a percentage. A higher mechanical efficiency indicates that less energy is lost in the conversion process.
Why cant a machine put as much energy out as you put in?
Losses of energy within the machine- some of the energy is used up by friction, and converted to heat. There is also the matter of efficency of a machine. The less efficent, the more power you must put in to get the same output.
Why does a high-efficiency machine is more desirable than low-efficiency machine?
High efficiency means that a large percentage of the energy used is converted to something useful (the desired output of the machine), and a low percentage is wasted.High efficiency means that a large percentage of the energy used is converted to something useful (the desired output of the machine), and a low percentage is wasted.High efficiency means that a large percentage of the energy used is converted to something useful (the desired output of the machine), and a low percentage is wasted.High efficiency means that a large percentage of the energy used is converted to something useful (the desired output of the machine), and a low percentage is wasted.
How useful are wind turbines?
The wind turbines is a machine that converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, The machine is usually called a windmill. If the energy is then converted to electricity, the machine is called a wind generator, wind turbine, or wind energy converter.
What is the efficiency of a machine that requires 150 J of input energy to do 20 J of useful work?
The idea here is to divide the useful work by the input energy. (Note: Usually "power" would be used instead of "energy"; power is measured in joules/second.)
A machine has an effciency of 91 percent if the energy is supplied to the machine is 4000 watts what is the amount being used for work?
The efficiency of a machine is given by the ratio of useful work output to the energy input. Therefore, if the machine has an efficiency of 91%, the amount being used for work would be 91% of the energy input. In this case, if the energy supplied is 4000 watts, the amount being used for work would be 0.91 * 4000 = 3640 watts.
What happens to the kinetic energy of a machine when it stops?
When a machine stops, its kinetic energy is converted into other forms of energy such as thermal energy or sound energy due to friction and other factors. Essentially, the kinetic energy is dissipated and transformed into different forms as the machine comes to a halt.
What kind of energy does a machine use?
The energy that is used to make a machine run is electrical energy.
Is the efficiency of a machine is 60 the percentage of work input used to overcome friction?
No, efficiency of a machine is a measure of how well input energy is converted into useful output work, and is calculated as useful work output divided by total work input. The percentage of work input used to overcome friction would be related to the frictional losses in the machine, not the overall efficiency.
When a machine is used to perform a task work output is always more than work input.?
This statement is not always true. In reality, some energy is lost in the form of heat, sound, or friction while a machine is being used, meaning that the work output is often less than the work input due to energy losses within the system. This concept is known as efficiency, and it is a measure of how well a machine can convert input energy into useful output energy.
What work is input for a machine?
The energy that is used to make the machine work.
What is a mechanical Effeciency?
Mechanical efficiency is a measure of how well a machine converts input energy into useful output energy. It is calculated by dividing the actual output power of the machine by the input power and multiplying by 100% to get a percentage. A higher mechanical efficiency indicates that less energy is lost in the conversion process.
Why cant a machine put as much energy out as you put in?
Losses of energy within the machine- some of the energy is used up by friction, and converted to heat. There is also the matter of efficency of a machine. The less efficent, the more power you must put in to get the same output.
How is the efficiency of a compound machine calculated?
The efficiency of a compound machine is calculated by dividing the output work of the machine by the input work. Mathematically, it can be expressed as Efficiency = (Output work / Input work) * 100%. It gives a measure of how well the machine converts input work into useful output work.
