Why is the work output always less than the work input?

Answers

Answer 1

Answer: because energy is wasted either in the form of heat energy or something else (like friction)

Related Questions

Which is a chemical property that can be used to identify calcium carbonate
In an open system such as a campfire matter can
Why are frames of reference important for motion
I don't understand these following questions, can someone please help me?1) find the work done by a 25 N force applied for 6 meters2) calculate the potential energy of a 5 kg object sitting on a 3 m ledge3) a rock is at the top of a 20 meter tall hill, the rock has a mass of 10 kg. how much potential energy does it have?
The rate at which an object moves

Suppose a scientist made this model.what info did the scientist need to know in order to make the model

Answers

Suppose I wanted to answer this question about the model.
What info about the model would I need to know in order to
make any intelligent guess about the model ?

Hint:
It would really help if I could SEE the model, or at least a photo of it.

Why is an objects density expressed as a combination of two units

Answers

Except for mass, length, time, and electric charge, EVERY quantity is
a combination of units ... of THOSE units in fact. Hadn't you noticed ?

An objects density is expressed as a combination of two units because the equation for density is Mass/Volume=Density. Therefore, both the mass and the volume retain a unit measure and when they are put together they create an expression that is a combination of two units such as kg/m^3 or g/cm^3.

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

Answers

Answer:

196 J

Explanation:

PE = mgh

PE = (10 kg) (9.8 m/s²) (2 m)

PE = 196 J

Group__ contains elements like fluorine chlorine bromine iodine and astatine

Answers

Group 17 or vii contain element like fluorine, chlorine, bromine, iodine and astatine

explanation

Group 17 element in periodic table are referred to as halogen.
They have 7 valence electron
They are highly reactive
Have a low melting and boiling point but increases down the group
They have a tendency to form salt
There electronegativity decreases down the group.

Which wave causes the medium to vibrate only in a direction parallel to the wave's motion?

Answers

longitudinal waves causes the medium to vibrate only in a direction parallel to the wave's motion

In a parallel circuit, the current in each branch of the circuit is determined by

Answers

Answer:

resistances in parallel combination of resistance.

1/Rp = 1/R1 + 1/R2 + 1/R3....

The potential difference will be V.

By applying Ohm's law,

V = IR

Other Questions

Which of the following statements is true?The more massive an object, the faster its acceleration of gravity.Heavier objects will free-fall more quickly than lighter objects.Objects in free-fall do not experience air resistance.Mass and weight are the same.

17. Which of the following is the closest weight in newtons of a 7.0-kilogrambowling ball? *A. 7.0 newtonsB. 70 newtonsC. 700 newtonsd. 7000 newtons

2. When the pump removed the air inthe bell, the ballooncontractedexpanded

Which of the following answers describe how to calculate the acceleration of an object? A. Divide the change in the objects velocity by the time it takes to make that change.B. Divide the time the object travels by the distance it travels. C. Calculate the distance the object travels and divide that by the time it takes to get there.D. Calculate the velocity of an object and divide that by the time the object is in motion.