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Masja [62]
2 years ago
13

How is high temperature achieved by concave mirror?

Physics
2 answers:
Anika [276]2 years ago
8 0

<u>Answer: </u>

Because <em>"a concave mirror converge the parallel sun rays at a point, so high temperature is achieved"</em>

Example:

           It is used in the design of solar furnaces, because they converge the parallel sun rays at a point. This helps to increase the temperature of the furnace.

tensa zangetsu [6.8K]2 years ago
3 0

A concave mirror is used in the design of solar furnaces because they converge the parallel sunrays at a point. This helps to increase the temperature of the furnace.

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A cork has weight mg and density 25% of water’s density. A string is tied around the cork and attached to the bottom of a water-
yuradex [85]

Answer:

Explanation:

Given

Density of Cork \rho _c=0.25\rho _{water}

Considering V be the volume of Cork

Buoyant Force will be acting Upward and Weight is acting Downward along with T

Since density of water is more than cork therefore Cork will try to escape out of water but due to tension it will not

we can write as

\rho _{water}Vg-\rho _Cvg-T=0

where T=tension

Thus Tension T is

T=Vg(\rho _{water}-\rho _c)

Taking \rho _c common

T=\rho _cVg(\frac{\rho _{water}}{\rho _c}-1)    

T=mg(\frac{\rho _{water}}{\rho _c}-1)

T=mg(4-1)

T=3mg

4 0
3 years ago
I need help
kupik [55]
I like to just keep writing them over and over on a page also if you remember them just before the exam than as soon as you start write them on the front of your test so you don’t forget them.
Hope this helps.
7 0
3 years ago
Read 2 more answers
What is the relationshop between a pure substance and a mixture
ryzh [129]

The difference between a pure substance and a mixture is that mixtures are combinations of two or more pure substances, while pure substances cannot be separated into any other kinds of matter.

7 0
3 years ago
There are seven fundamental quantities in physics. true or false​
Gemiola [76]

Answer:

True

Explanation:

mass, length, time, electric current, temperature, luminous intensity and amount of substance

6 0
2 years ago
When the car is moving the unbalanced force acting on the car is 150 N.
dsp73

Answer:

 F = m a,  a = 0.3 m / s²

this acceleration points in the direction of the unbalanced force

Explanation:

In this problem we must use Newton's second law. Let's fix a reference system with the x axis parallel to the surface and the y axis perpendicular

Y axis y

         N-W = 0

         N = W = mg

X axis

        ∑ F = m a

        F = m a

we substitute

        150 = m a

To find an acceleration value, the mass of the car must be known, if the mass is m = 500 kg

        a = 150/500

        a = 0.3 m / s²

this acceleration points in the direction of the unbalanced force

8 0
2 years ago
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