In hot climate regions, the outer walls of the house are preferred to be white in colour because ______.
white colour reflects sunlight to make the interior of the house cool
The correct answer is 4. white colour reflects sunlight to make the interior of the house cool.
In hot climates, it's crucial to minimize heat absorption within buildings to maintain a comfortable indoor temperature. White surfaces have a high albedo, meaning they reflect a significant portion of the incoming solar radiation. Darker colours, conversely, absorb more sunlight, leading to increased heat gain. By painting the outer walls white, a significant amount of sunlight is reflected away from the house, preventing the interior from heating up excessively. This reduces the reliance on air conditioning and helps conserve energy.
Let's look at why the other options are incorrect:
- Option 1 is subjective and irrelevant to the thermal properties of the wall.
- Option 2 is incorrect; colour does not significantly impact the durability of a wall.
- Option 3 is the opposite of what is desired. Absorbing more sunlight would increase the interior temperature.
Therefore, using white paint on exterior walls in hot climates is a practical and effective strategy for passive cooling.
Similar Questions
- The work done by a 10 Newton force acting on a body, which results in the displacement of 2 m in the direction of the force, is __________.
- An object of mass 1 kg is moving with a velocity 10 m/s. Find the kinetic energy of the object.
- The efficiency of a machine can never be ______.
- In practice, the work output of a machine is ______ the work input due to the effect of friction.
- How much energy is used by an 80% efficient, 2kW motor running at a peak load for 5 hours?
- A pump is required to lift 600 kg of water per minute from a well 25m deep and to eject it with a speed of 50 m/s. If \(g = 10 \text{ m/s}^2\), the power required to perform the above task is
- A lorry and a car moving with the same kinetic energy are brought to rest by applying the same retarding force. Then:
- In practice, the work output of a machine is always less than the work input due to the effect of ______.
- Ideal machines are those imaginary machines which are ______.
- The efficiency of a simple machine is defined as ______.
Important Questions from Work Power and Energy
Which of the following is an example of potential energy?
_______ is one of the chemical used to produce Ocean Thermal Energy.
A body of mass 2kg is thrown up vertically with a kinetic energy of 500J. If the acceleration due to gravity is 10 m/s2, the height at which the kinetic energy of the body becomes half of the original values is _____
Arjun has a mass of 50 kg, he eats banana of 1000 calories. If this energy is used up to lift him from the ground, the height to which he can climb is _______. Take g = 10 m/s2 and 1 calories = 4.2 Joule.
When a body of mass 'm' attains a velocity 'v' from rest in time 't', then kinetic energy of translation is:
