All categories

4 years ago

Which of the following techniques have been employed to improve the efficiency of fireplaces?

Physics

2 answers:

DENIUS [597]4 years ago

7 0

Answer:

Addition of catalytic combustors and addition of boilers.

Explanation:

A fireplace is a masonry or prefabricated construction of metal and concrete that warms the environment. It is a domestic structure present in many houses, where a fire can be lit. It consists of a space lined with non-flammable materials such as stone and brick, to burn wood, and a chimney that lets smoke and other particles out. It was used for heating, cooking and lighting in old houses, but nowadays it is used mainly as decoration, or to heat houses in winter.

Over the years and advances in construction techniques, improvements were added to the construction of the fireplaces that made them more efficient. Among these improvements we can mention: addition of catalytic combustors and addition of boilers.

Ksivusya [100]4 years ago

6 0

The first would be the right answer, all catalysts somehow boosts the performance

You might be interested in

"Darwin's finches" reside on the Galapagos Islands. Each species has a different type of beak, however, they can all be traced b

Ivahew [28]

It would be adaptation because the finches live in different islands and each have different weather and resources

3 0

3 years ago

Read 2 more answers

A concave mirror is diverging mirror.true or false

marissa [1.9K]

Answer:

true

Explanation:

it is concave when it diverging

4 0

3 years ago

Ian has a mass of 58.0 kg. what i the weight

nekit [7.7K]

Answer:

568.4N

Explanation:

weight =58 x gravity

=58x9.8

=568.4N

6 0

3 years ago

Two carts, one twice as heavy as the other, are at rest on a horizontal track. A person pushes each cart for 8 s. Ignoring frict

GalinKa [24]

Answer:

The correct option is: B that is 1/2 K

Explanation:

Given:

Two carts of different masses, same force were applied for same duration of time.

Mass of the lighter cart = $m$

Mass of the heavier cart = $2m$

We have to find the relationship between their kinetic energy:

Let the KE of cart having mass m be "K".

and KE of cart having mass m be "K1".

As it is given regarding Force and time so we have to bring in picture the concept of momentum Δp and find a relation with KE.

Numerical analysis.

⇒ $KE = \frac{mv^2}{2}$

⇒ $KE = \frac{mv^2}{2}\times \frac{m}{m}$

⇒ $KE = \frac{m^2v^2}{2}\times \frac{1}{m}$

⇒ $KE = \frac{(mv)^2}{2}\times \frac{1}{m}$

⇒ $KE = \frac{(\triangle p)^2}{2}\times \frac{1}{m}$

⇒ $KE = \frac{(\triangle p)^2}{2m}=\frac{(F\times t)^2}{2m}$

Now,

Kinetic energies and their ratios in terms of momentum or impulse.

KE (K) of mass m.

⇒ $K=\frac{(F\times t)^2}{2m}$ ...equation (i)

KE (K1) of mass 2m.

⇒ $K_1=\frac{(F\times t)^2}{2\times 2m}$

⇒ $K_1=\frac{(F\times t)^2}{4m}$ ...equation (ii)

Lets divide K1 and K to find the relationship between the two carts's KE.

⇒ $\frac{K_1}{K} =\frac{(F\times t)^2}{4m} \times \frac{2m}{(F\times t)^2}$

⇒ $\frac{K_1}{K} =\frac{2m}{4m}$

⇒ $\frac{K_1}{K} =\frac{2}{4}$

⇒ $\frac{K_1}{K} =\frac{1}{2}$

⇒ $K_1=\frac{K}{2}$

⇒ $K_1=\frac{1}{2}K$

The kinetic energy of the heavy cart after the push compared to the kinetic energy of the light cart is 1/2 K.

7 0

3 years ago

Fill in the blank the process of evaporative cooling helps the body .

Nina [5.8K]

Answer:

The process of evaporative cooling helps the body is explained below in complete details.

Explanation:

Your body performs the application of the evaporative process when secreting. Sweat, which contains 90 percent water, commences evaporating. ... This appears in a cooling impression (described as evaporative cooling) that serves to sustain body temperature and cools the body down when it becomes too hot.

3 0

3 years ago