Ask question

Ask question

All categories

4 years ago

5

Give some everyday examples of the transport of heat by convection and by radiation.

1 answer:

Ksivusya [100]4 years ago

4 0

Answer and Explanation:

TRANSPORTATION OF HEAT THROUGH CONVECTION :

The best example of heat transfer from convection process is fan when there is too hot and we switch on the fan then the air which are produced by fan cools the room this process of removing heat is called connective heat transfer.
When milk is too hot and we want to drink it then we blow air across milk so that milk will become cool this is also a convection process.

TRANSPORTATION OF HEAT THROUGH RADIATION :

The best example of heat transfer from radiation from radiation process is Sun from sun we got heat in form of radiation
When we go on the roof in night in winter days it is so cooled this is also due to radiation process.

You might be interested in

study a 75kg person stands on a scale in an elevator what does read in n and in kg when the elevator is at rest?

Verdich [7]

To solve this problem we will use Newton's second law in order to obtain the weight of a person. The second law tells us that

F = ma

Where,

m = mass

a = Acceleration

In this particular case, the acceleration is equal to that exerted by the earth through gravitational acceleration, so if the person's weight is 75Kg and the gravity is $9.8m / s^2$ , the weight of the body will be,

$F_W =mg$

$F_W = (75kg)(9.8m/s^2 )$

$F_W = 735.75N$

When the elevator is at rest this reads 735.75N and 75Kg (The same mass of the person)

6 0

3 years ago

What is the difference between magnetic flux and magnetic flux linkage?

Nimfa-mama [501]

Answer:

The difference is between number of turns, Magnetic flux linkage has number of turns while Magnetic flux lacks it

${}$

Explanation:

N is number of turns

6 0

2 years ago

A student of mass M = 89 kg takes a ride in a frictionless loop-the-loop at an amusement park. The radius of the loop-the-loop i

Hunter-Best [27]

Answer: 17.5 kN

Explanation:

force downward on student:  mg+142-mv^2/r=0

 mg=mv^2/r-142

 mv^2/r=mg+142   at bottom, apparent weight weight=mg+mv^2/r=mg+mg+142

 apparent weight= 89(2g)+142    for force at bottom, reverse v^2/r 

force=m(g+v^2/r) = 89 ( 9.8 + v^2 / 19 )

F = mg + mv^2 / r

F = mg + mg + 142 = 2mg + 142 = 2 x 89 x 9.8 + 142 = 17.5 kN

4 0

4 years ago

A person with a mass of 80 kg has a force of gravity from the earth on them of about 800 N. This person is standing on a scale w

LenKa [72]

Answer:

So scale will read a force force of 880 N

Explanation:

We have given that mass of the person m = 80 kg

Force of gravity from the earth F = 800 N

We know that force is given by $F=mg$

So $800=80\times g$

$g=10m/sec^2$

It is given that acceleration of the elevator a = $1m/sec^2$

We have to find the force which scale read

So force is given by $F=m(g+a)=80(10+1)=880N$

So scale will read a force force of 880 N

7 0

3 years ago

Which combination of characteristics produces the LEAST energetic waves?

alexira [117]

Answer:

C.

long wavelength, low frequency

Explanation:

The energy of wave depends on the wave frequency and wave amplitude.

The Wave energy can also be determined by wavelength, wave speed, amplitude, water density e.t.c

According to the question that

Which combination of characteristics produces the LEAST energetic waves ?

The correct option will be

C. long wavelength, low frequency

Option C is therefore the correct answer.

8 0

4 years ago