4 years ago

How does a vacuum flask keep drinks hot? Explain in terms of conduction, convection and radiation.

1 answer:

4 0

Vacum flask has inner layer of glass and outer body of plastic.the glass has a reflective metal layer..when a hot drink is poured into the flask it prevents conduction.tight lid stops the convection.when radiation tries to leave the hot drink the reflective layer of the glass reflects it back so no heat can escape.

You might be interested in

According to diagonal rule, the orbital with lowest energy in the given following is ________.

Kaylis [27]

The orbital with the lowest energy is 3s.

5 0

3 years ago

Any one tell me about the earth rotation it rotatining or not with any proof?

Dafna11 [192]

The proof that the earth is rotating is the happens of night and day also the seasons, eg. winter, summer, autumn.

6 0

3 years ago

Before the start of a trip, air in a tire is at 320 kPa gage pressure and 27°C temperature. At the end of the trip the tire pres

tia_tia [17]

Answer:

The temperature of air in the tire is 55.57 ºC

Explanation:

Please look at the solution in the attached Word file

Download docx

7 0

3 years ago

If the distance between the center of two objects is quadrupled. The gravitational

Juliette [100K]

Answer:

F' = F/16

Explanation:

The gravitational force between masses is given by :

$F=G\dfrac{m_1m_2}{r^2}$

If the distance between the center of two objects is quadrupled, r' = 4r

New force will be :

$F'=G\dfrac{m_1m_2}{r'^2}\\\\F'=G\dfrac{m_1m_2}{(4r)^2}\\\\F'=\dfrac{Gm_1m_2}{16r^2}\\\\F'=\dfrac{1}{16}\times \dfrac{Gm_1m_2}{r^2}\\\\F'=\dfrac{F}{16}$

So, the new force will change by a factor of 16.

6 0

3 years ago

Corresponde al conjunto de puntos por donde pasa un cuerpo al moverse

Anna35 [415]

Answer:

Means?

Explanation:

6 0

3 years ago