Answer:
Explanation:
The process during which pressure remains constant is called an isobaric process.
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<h2>5.368N, </h2>Explicación:
Según el principio pascal, establece que la presión aplicada en un punto sobre un líquido en un recipiente cerrado es igual a igual a la presión en cualquier otro punto del líquido.
Matemáticamente Presión ejercida por el pistón más pequeño = Presión ejercida por el pistón más grande.
La presión es la relación entre la fuerza y su área de sección transversal.
P = Fuerza / Área de sección transversal
Sea P1 la presión sobre el pistón más pequeño y P2 la presión ejercida por el pistón más grande.
Como P1 = P2 entonces;
F1 / A1 = F2 / A2
Dado F1 = 450N, A1 = 14 cm², A2 = 167 cm² y F2 =?
Sustituyendo el valor conocido en la fórmula para obtener el requerido, tenemos;
Por lo tanto, la fuerza que se obtendrá en el pistón más grande de una prensa hidráulica cuya área es de 167 cm² es aproximadamente 5,368N,
Answer:
Work can transfer energy between objects and can cause a change in the form of energy.
Explanation:
The best explanation can be done with an example.
Consider an apple of mass m falling from a tree. Initially, the apple is at rest on the tree, at a certain height h above the ground, so it has a form of energy called gravitational potential energy, equal to:
where g is the acceleration due to gravity.
As the apple falls, the force of gravity acts on it, and so this force does work on the apple. As a result, the potential energy of the apple is converted into another form of energy, kinetic energy, which is the energy due to the motion of the apple:
where v is the speed of the apple.
Consider another example: a man pushing a box along the floor with a force F. The man is doing work on the box, and this work is equal to
where d is the displacement of the box. As a result of this work, some of the chemical energy contained in the muscles of the man is transferred into the box and converted to kinetic energy of the box, which is put in motion and it gains a certain speed v. In particular, if there are no frictional forces involved, the work done by the man is equal to the kinetic energy gained by the box.
Answer:
Explanation:
Given
Height of tree is H=320 ft
length of shadow L=130 ft
let be the angle of elevation
using trigonometric relation
