A milk
Explanation:
A solution is a homogeneous mixture of solutes and solvents. The solute is the substance usually solid dissolved to make the solution.
- The solute is usually present in small amount compared to the solvent.
- A milk is solution of different components.
- Most liquid milk are made up of powdered milk dissolved in water and sugar added to it.
- All the constituent will now exist in a single phase as a liquid and be homogeneous.
- They are homogeneous in the sense that all the parts are uniform.
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Answer:
The girl is doing work on the ball because the energy in her muscles changed, even though the ball is not displaced.
Explanation:
The complete question is...
Which of these correctly describes whether a girl holding a ball in the same position is doing work on the ball?
-The girl is doing work on the ball because the energy of the ball changed, even though it is not displaced.
-The girl is doing work on the ball because the energy in her muscles changed, even though the ball is not displaced.
-The girl is doing no work on the ball because the ball is not displaced.
-The girl is doing no work on the ball because she is exerting a net force on the ball.
Holding up a ball costs energy, which is used to counter the work that would have otherwise be done on the ball by gravity. Although no physical distance is moved, we should consider the fact that by holding the ball, the girls hand exerts physical force to hold the ball in place. Also, there is a potential gravitational work on the ball due to gravity, but the force exerted by the girls hand does an equivalent of this gravito-potential work in order to counter it and hold the ball in place. All these activities eventually lead to a change in energy in her hand muscle to show that energy is expended.
Applied force in an opposite direction.
The correct label would be: small f and capital D.
The car jack is an example of a machine, which is defined as anything that a person can use to make the exertion of force easier. So with the small force he exerts on the jack, the distance that the car is lifted up increases.
