How do you calculate productivity?
Productivity is computed by dividing average output per period by the total costs incurred or resources (capital, energy, material, personnel) consumed in that period. Productivity is a critical determinant of cost efficiency. Measuring productivity tells us a lot about the work we’re doing.
How do you calculate work time and efficiency?
efficiency = (10 + 20)% = 30%. This means in one day A and B together can do 30% of the work. Therefore, Number of days A and B together take to do 100% of work = (100/3) days = 3.33 days. Example 3: A can do a certain work in 12 days.
How do you calculate time and distance?
You can use the equivalent formula d = rt which means distance equals rate times time. To solve for speed or rate use the formula for speed, s = d/t which means speed equals distance divided by time. To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.
How do you calculate work output?
The formula calculating work output is F*D/T, where F is the force exerted, D is the distance and T is the time. The work output of a system is also described as its Power. In order for work to be done, force has to be applied in the direction of the motion.
What is the formula of output?
And we know that there is a simple formula to calculate the total amount of output generated: total extra output = multiplier × initial injection where multiplier = 1/(1-c) where c = marginal propensity to consume. So if c = 0.8 (i.e. we spend 80% of every extra dollar), then the multiplier is 5.
What is work input and output?
Work input is work done on a machine to get the desired output. Work output is the amount of desired work that is done by a machine. For an ideal machine, the work output is equal to the work input i.e the efficiency is 1.
What is difference between output and input?
An input device sends information to a computer system for processing, and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device.
What is the sign if work is output of the system?
If energy enters the system, its sign is positive. If energy leaves the system, its sign is negative. If work is done on the system, its sign is positive. If work is done by the system, its sign is negative.
Is heat into system positive or negative?
According to the classical sign convention, heat transfer to a system and work done by a system are positive; heat transfer from a system and work done on a system are negative.
How do you know when something is positive or negative?
Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.
Is heat released positive or negative?
Heat released is negative and heat absorbed is positive. This all goes back to the concept of a system and the surroundings. The system is what we’re focusing on while the surroundings are everything else. We think of change in energy from the perspective of the system.
How do you tell if heat is being released or absorbed?
Enthalpy of a reaction is defined as the heat energy change ( Δ H ΔH ΔH ) that takes place when reactants go to products. If heat is absorbed during the reaction, Δ H ΔH ΔH is positive; if heat is released, then Δ H ΔH ΔH is negative.
When energy is transferred as heat from the system to the surroundings ΔH is negative?
A combustion reaction is exothermic. When energy is transferred as heat from the system to the surroundings, ΔH is negative. A combustion reaction is exothermic. A calorimeter is used to measure the enthalpy of a reaction.
Is heat being released or absorbed?
endothermic: Heat is absorbed by the system from the surroundings. exothermic: Heat is released by the system into the surroundings. law of conservation of energy: In any physical or chemical process, energy is neither created nor destroyed. surroundings: Everything in the universe that is not part of the system.
Is Melting ice endothermic or exothermic?
As a result, the temperature of the ice rises and it turns into water! Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.
What is the change in heat formula?
Heat and Changes of State. The discussion above and the accompanying equation (Q = m•C•∆T) relates the heat gained or lost by an object to the resulting temperature changes of that object.