EjerciciosFyQ

Types of forces: at a distance or through contact (4841)

F_y_Q — 2020-02-04T06:23:54Z

Indicate which of these phenomena are produced by forces at a distance and which are produced by forces through contact:
a) The motion of a train due to magnetic levitation.
b) The deformation of a spring when a weight is attached to it.
c) The skidding of a car on a pool of water.
d) The formation of the aurora borealis.
e) The motion of a cupboard when pushed.

- Forces and their effects / RESUELTO, INGLÉS, Bilingüismo

Classification of bodies: rigid, elastic or plastic (4842)

F_y_Q — 2019-11-11T18:42:02Z

Classify the following objects into rigid, plastic or elastic bodies:
a) The mechanism of a key on the computer keyboard.
b) Sunglasses.
c) A headband.
d) A steel fork.
e) The bristles of a toothbrush.
f) Bread dough.

- Forces and their effects / RESUELTO, INGLÉS, Bilingüismo

Will do float silver over mercury?

F_y_Q — 2019-01-03T08:12:31Z

Imagine that you heat a system with upper temperatures than the fusion points of silver and mercury. If you put in contact both substances, will do silver float over mercury? Look for the information that you need on the Internet and explain your answer.

The fluids, remember that silver and mercury will be in the liquid state, they will order their positions according to the value of their densities, the higher the density, the lower the position.
Looking for the density data for mercury and silver, we obtain: and . Silver will float over the mercury because its density is smaller than the density of mercury.

Acceleration of a car (3583)

F_y_Q — 2016-05-22T06:35:14Z

A car is increasing its speed from 40 m/s to 70 m/s. What is its acceleration if the time needed was 3 seconds?

Acceleration is defined by:

Replace the problem data:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.

Time taken to cover a distance by car (3567)

F_y_Q — 2016-05-06T04:55:51Z

If the speed of a car is 75 km/h. How long does it take the car to cover a distance of 75 km?

Using the definition of speed:

Rearranging the formula to solve for time:

Substituting the given values:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.

Time it takes for blood to cover 30 cm distance (3494)

F_y_Q — 2016-02-23T05:08:46Z

The speed of blood flow is 30 cm/s. Considering a vein as a straight path, how long will it take for blood to cover a distance of 30 cm?

Speed is the quotient between distance and time. To find the time, you use the fomula:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.