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3 years ago

Why energy cannot escape from the room by conduction

1 answer:

8 0

<span>Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. This is because the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.

Answer)-</span><span> Double glazing

Hope This Helps Human <3
</span>

You might be interested in

Which are advantages of reflecting telescopes? Check all that apply.

Mashcka [7]

On e2020 the answers are:

1. There is no rainbow-like halo around the image.

2. Reflecting telescopes can be made very large.

4. Only the reflecting side of the primary mirror needs to be perfectly shaped and smooth.

I hope that helps!!

3 0

3 years ago

Read 2 more answers

Tendons are, essentially, elastic cords stretched between two fixed ends; as such, they can support standing waves. These resona

Hatshy [7]

Answer:

161.938 Hz

Explanation:

the computation of the fundamental resonant frequency is shown below

p = 1100 kg/m^3

A = 130 mm^2

= 130 ×10^-6 m^2

T = 600 N

L = 20 cm

= 0.2 m

Now the linear density of tendon is

= 1100 kg/m^3 × 130 ×10^-6

= 0.143 kg/m

Now the wave of the string is

= √600 ÷ √0.143

= 64.775 m/s

Now finally the fundamental resonant frequency is

= 64.775 ÷ (2 × 0.2)

=161.938 Hz

3 0

3 years ago

Which of the following. Chemical represent the law of conservation of Matter?

vazorg [7]

Answer:

The answer is first one 1...

6 0

3 years ago

You yell into a canyon. You hear the echo in 3 seconds. How long did the sound of your voice travel before bouncing off a cliff?

Lilit [14]

Answer:

The sound travelled 516 meters before bouncing off a cliff.

Explanation:

The sound is an example of mechanical wave, which means that it needs a medium to propagate itself at constant speed. The time needed to hear the echo is equal to twice the height of the canyon divided by the velocity of sound. In addition, the speed of sound through the air at a temperature of 20 ºC is approximately 344 meters per second. Then, the height of the canyon can be derived from the following kinematic formula:

$2\cdot h = v\cdot t$ (1)

Where:

$h$ - Height, measured in meters.

$v$ - Velocity of sound, measured in meters per second.

$t$ - Time, measured in seconds.

If we know that $v = 344\,\frac{m}{s}$ and $t = 3\,s$ , then the height of the canyon is:

$h = \frac{v\cdot t}{2}$

$h = \frac{\left(344\,\frac{m}{s} \right)\cdot (3\,s)}{2}$

$h = 516\,m$

The sound travelled 516 meters before bouncing off a cliff.

7 0

3 years ago

Astronomers have found that there is more helium in the universe than stars could have made in the 13.8 billion years that the u

brilliants [131]

Big Bang scenario solves the problem of astronomers, as they found that there is more helium in the universe than stars and this is explained by the Big Bang scenario by saying that the fusion time elapsed the helium remained without forming stars

<h3>What is Big Bang scenario?</h3>

Generally, According to the Big Bang theory, all current and matter in the Universe came into being at the same time, around 13.8 billion years in the past.

In conclusion, The fusion time elapsed after 3 to 4 mins.