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3 years ago

Para que el calor sea transmitido por conducción los cuerpos deben tocarse? verdadero o falso

Physics

1 answer:

dybincka [34]3 years ago

7 0

Answer:

verdadero

Explanation:

Conducción:Es la más sencilla de entender, consiste en la transferencia de calor entre dos puntos de un cuerpo que se encuentran a diferente temperatura, sin que se produzca transferencia de materia entre ellos.

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Help please! based on the following table, which object has the lowest density? A. object A B. object B C. object C D. object D

seraphim [82]

The answer to this question lies in the definition of density. One material will just float over another if its density is smaller. If one material is denser than the other, it will sink. Density can be defined as the mass per unit volume of a substance at a given pressure and temperature. Thus, for a material to float in water, it does not depend on the weight, or rather on the mass, but on the distribution of the mass by the volume occupied, that is, of the density. The more distributed the mass, that is, the larger its volume, the less dense the object and it will float.

Object C has the lowest density<span>
65 N or 6.5 Kg ------------ 6 N or 6 Kg

This effective mass under water will be its actual mass minus the mass of the fluid displaced.

The buoyant force on a submerged object is equal to the weight of the fluid displaced.
Weight of object - buoyant force on object (the mass of the fluid displaced)

6Kg - 6.5Kg= - 0.5Kg

</span>Answer: C. object C

6 0

3 years ago

Read 2 more answers

Which of the following is an example of rotation?

Ira Lisetskai [31]

D. An ice skater spinning in place

7 0

3 years ago

The electric potential at a certain location from a point charge can be represented by V. What is the value of the electric pote

adoni [48]

<h2>Answer:</h2>

If you triple the charge, the electric potential is 3V.

<h2>Explanation:</h2>

If you triple the charge, the electric potential is 3V. Put another way, the value of the electric potential at the same location is tripled if the strength of the charge is tripled.

Well, the potential V due to a single point charge q is:

$V=\frac{1}{4\pi\varepsilon_{0}}\frac{q}{r}$

If the strength of the charge is tripled means that our new q1=3q, therefore:

$V=\frac{1}{4\pi\varepsilon_{0}}\frac{3q}{r}$

$V=3\frac{1}{4\pi\varepsilon_{0}}\frac{q}{r}$

So you can see that in fact if you triple the charge, the electric potential is 3V.

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3 years ago

a car carrying a 80-kgkg test dummy crashes into a wall at 28 m/sm/s and is brought to rest in 0.10 ss. part a what is the magni

iragen [17]

The magnitude of the average force exerted by the seat belt on the dummy is 224N .

<h3>What is an average force ?</h3>

The average force is the force produced by an object moving over a specific period of time at a given rate of speed, or velocity. This velocity is not instantaneous or precisely measured, as the word "average" indicates.

<h3>Briefing:</h3>

mass of the dummy (m) = 80kg

velocity of the dummy (v) = 28 m/s

time (t) = 10 seconds

Average force exerted (F)

To calculate the average force;

According to the formula;

F = (m × v) ÷ t

Where;

F represents the force exerted

m represents the mass of the dummy

v represents the velocity

t represents the time

F = m * v/t

F = 80 *28/10

F = 224

F = 224 N

The force exerted by the seat belt on the dummy is 224N .

To know more about Average force visit:

brainly.com/question/24704743

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2 years ago

What do you know about volleyball

OverLord2011 [107]

Answer:

its my favourite game...........

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3 years ago