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jeka57 [31]
3 years ago
8

Explain the working of thermos flask in simple and easy words ​

Physics
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

a thermos is designed to keep hot things hot by not allowing heat to escape.

Explanation:

A thermos is a bottle with a double-walled container inside of it. The air between the two walls is sucked out during construction, creating a vacuum.

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A water hose is used to fill a large cylindrical storage tank of
ludmilkaskok [199]

Answer:

maximum possible speed by solving above equation for 7D is

v_{max} = \sqrt{\frac{49}{5}gD}

minimum possible value of speed for solving x = 6D is given as

v_{min} = \sqrt{9gD}

Explanation:

Let the nozzle of the hose be at the origin. Then the nearest part of the rim of the tank is at (, ) =  (6, 2) and the furthest part of the rim is at (, ) = (7, 2).

The trajectory of the water can be found as follows:

x = (v_o cos45) t

y =  (v_o sin45) t - \frac{1}{2}gt^2

Now from above two equations we have

y = x - \frac{gx^2}{v_o^2}

now we know that height of the cylinder is 2D so we have

x - \frac{gx^2}{v_o^2} = 2D

by solving above equation we have

x = \frac{v_o^2 \pm v_o^2\sqrt{1 - \frac{8gD}{v_o^2}}}{2g}

now we know that maximum value of x is 7D

so the maximum possible speed by solving above equation for 7D is

v_{max} = \sqrt{\frac{49}{5}gD}

minimum possible value of speed for solving x = 6D is given as

v_{min} = \sqrt{9gD}

6 0
3 years ago
If a car is moving to the left with constant velocity, one can conclude that If a car is moving to the left with constant veloci
FinnZ [79.3K]

Answer:

Explanation:

If a car is moving to the left with constant velocity, one can conclude that

there must be no forces applied to the car .  The net force applied to the car is zero.

Since there is no acceleration ,no net force is applied , hence no force acts on the car.

6 0
4 years ago
Read 2 more answers
Please help<br> Quickly!!!..
zvonat [6]
There are two possible answers that I can see, C or D
4 0
3 years ago
Which describes the image produced by the lens?
Shalnov [3]
Converging only; diverging lenses<span> can only </span>produce upright images<span>which are reduced in size; an </span>inverted<span> and magnified </span>image<span> can be </span>produced<span> by a converging </span>lens<span> when the </span>object<span> is located between F and 2F. also know as t-6 over 6 the science oligical sign

hope this helped</span>
3 0
3 years ago
Read 2 more answers
If a vehicle is traveling at constant velocity and then comes to a sudden stop, has it undergone negative acceleration or positi
sertanlavr [38]

Answer:

Negative acceleration

Explanation:

Let us assume a vehicle is moving with a constant velocity u and then it comes to a sudden stop.

The initial velocity of the vehicle is u and finally it comes to rest, it means final velocity is 0.

As we know that,

Acceleration is equal to change in velocity divided by time taken.

a=\dfrac{v-u}{t}\\\\\text{Put v=0}\\\\a=\dfrac{-u}{t}

We can see that the value of acceleration is negative. Hence, it leads to negative acceleration.

6 0
3 years ago
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