Which describes how a simple machine can make work easier?

Which describes how a simple machine can make work easier?

Explain how a machine makes work easier. Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.

What are three ways machines make work easier?

Background Information. There are three ways simple machines make work easier: by increasing the distance through which force is applied, by changing the direction of applied force, or by multiplying force of speed of the energy applied.

What is the purpose of a simple machine?

The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task. To achieve this, the force applied must act over a longer distance or period of time resulting in the same amount of work being performed by a smaller force.

How Can machines be more efficient?

Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Oil is used to reduce friction between the moving parts of car engines. The use of oil makes engines more efficient. Bicycles lose energy to friction and to air resistance.

Can the efficiency of a heat engine be 1?

It is impossible for heat engines to achieve 100% thermal efficiency () according to the Second law of thermodynamics. This is impossible because some waste heat is always produced produced in a heat engine, shown in Figure 1 by the term.

Why is the efficiency of a refrigerator greater than 1?

Well, The COP of Refrigerator may be defined as the ratio of Refrigerant effect and work done by Compressor. It is always greater than 1. It increases with increase in Refrigerant effect and decreases when work done by compressor increases.

Can COP of refrigerator be greater than 1?

COP of refriegeration is always greater than one. The coefficient of performance (COP) of refrigeration is always more than 1. COP is the ratio of heat extracted from the refrigerator to the work done on the refrigerant. It is also called by the name Theoretical coefficient of performance.

Is a higher or lower cop better?

The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs.

What is COP in business?

End of day (EOD), end of business (EOB), close of business (COB), close of play (COP) or end of play (EOP) is the end of the trading day in financial markets, the point when trading ceases.

How do cops convert to efficiency?

Electric motor driven chillers are rated in kilowatts per ton cooling.

1. kW/ton = 12 / EER.
2. kW/ton = 12 / (COP x 3.412)
3. COP = EER / 3.412.
4. COP = 12 / (kW/ton) / 3.412.
5. EER = 12 / (kW/ton)
6. EER = COP x 3.412.

What is the efficiency of a chiller?

Calculating the efficiency of a chiller is fairly simple. It is measured in “COP” which stands for Coefficient Of Performance. The Coefficient of performance is just a ratio of the refrigeration effect produced by the chiller against the amount of electrical energy that went into the machine to produce this.

What is the best chiller efficiency?

Maximum chiller efficiency is producing the greatest tonnage at the lowest kilowatt usage. Maximum efficiency occurs with most chillers running at approximately 70-75 percent load and the lowest entering condenser water temperature (ECWT), based on design.

How do I reduce the power consumption of my chiller?

6 Tips to Reduce Water Chiller Energy Consumption and Save Money

1. Perfect Electricity Environment. In order to reduce the water chiller energy consumption.
2. Make Water Chiller Working Plane.
3. Regular Maintenance.
4. Pay Attention to The Environment.
5. Condensation Temperature.
6. Configurable Adjustable Coil.