Question

the length of a rectangle is trice then it's breath and area is 192sq cm..then find is breath​

Answer 1

Step-by-step explanation:

perfect blackbody or simply a blackbody is defined as a body which absorbs all the radiant energy incident on it.

A perfect blackbody or simply a blackbody is defined as a body which absorbs all the radiant energy incident on it.Fery designed a spherical blackbody which consists of a hollow double-walled, metallic sphere provided with a tiny hole or aperture on one side, Fig. The inside wall of the sphere is blackened with lampblack while the outside is silver-plated. The space between the two walls is evacuated to minimize heat loss by conduction and convection.

A perfect blackbody or simply a blackbody is defined as a body which absorbs all the radiant energy incident on it.Fery designed a spherical blackbody which consists of a hollow double-walled, metallic sphere provided with a tiny hole or aperture on one side, Fig. The inside wall of the sphere is blackened with lampblack while the outside is silver-plated. The space between the two walls is evacuated to minimize heat loss by conduction and convection.Any radiation entering the sphere through the aperture suffers multiple reflections where about 97% of it is absorbed in each incidence by the coating of lampblack. The radiation is almost completely absorbed after a number of internal reflections. A conical projection on the inside wall opposite the hole minimizes the probability of incident radiation escaping out.

When the sphere is placed in a bath of suitable fused salts, so as to maintain it at the desired temperature, the hole serves as a source of black-body radiation. The intensity and the nature of the radiation depend only on the temperature of the walls.

When the sphere is placed in a bath of suitable fused salts, so as to maintain it at the desired temperature, the hole serves as a source of black-body radiation. The intensity and the nature of the radiation depend only on the temperature of the walls.

A blackbody, by definition, has a coefficient of absorption equal to 1. Hence, its coefficient of reflection and coefficient of transmission are both zero. The radiation from a blackbody, called blackbody radiation, covers the entire range of the electromagnetic spectrum. Hence, a blackbody is called a full radiator.

Answer 2

GiveN :-

• The length of a rectangle is trice then it's breath

• Area of the rectangle = 192 cm²

To FinD :-

• Breadth of the rectangle

SolutioN :-

Let x be the breadth of rectangle

Therefore length of rectangle is 3x

$\large \red \bigstar \: \boxed{ \green{\bf Area_{(rectangle)}=2(L+B) }}$

Substitute values in formula :-

$\: \: \: \: \: \: \: \longmapsto \sf2(x + 3x) = 192$

$\: \: \: \: \: \: \: \longmapsto \sf2(4x) = 192$

$\: \: \: \: \: \: \: \longmapsto \sf6x = 192$

$\: \: \: \: \: \: \: \longmapsto \sf x = \frac{192}{6}$

$\: \: \: \: \: \: \: \longmapsto \boxed{\sf \purple{ x = 32 \: cm }}$

$\large \therefore \: \underline{ \bf \pink{Breadth \: of \: the \: rectangle \: is \: 32 \: cm}}$