Table of Contents
Why do they water roads during hot summer?
Water has the highest specific heat capacity of 4.2 Jg-1 °C-1. Thus, water absorbs large amount of heat from the roads, but its own temperature does not rise much. Thus, on the whole the roads get cooled.
Why do people sprinkle water on the road?
We sprinkle water on the roof or open ground in hot summers. It evaporates or vaporises by taking the large amount of latent heat from the roof or ground and surrounding air. Hence, the roof or ground becomes cool after losing its heat to water.
Why is water sprinkled on the road in the evening during hot summer months?
Answer Expert Verified When water is sprinkled on the road, the road absorbed the water and helps to reduce the heat from the road caused by the hot summer. It also helps to remove dust particles.
Why is water sprayed on water?
The water spray create ripples across the water which then makes it easier for divers to see how far they are from the surface of the pool and they can therefore time their moves to end right before they enter the water.
Why do we sprinkle water before sweeping in a dusty room?
Water is sprinkled before sweeping the room as it helps to coagulate the dust particles. Light particles after coagulation become heavier and settle down due to which it becomes easier to remove them easily.
Why does water become cold if we add some ice cubes in it?
When ice is added to the water, the water becomes cold because there is heat exchange taking place between the molecules of water and ice cubes. As the ice starts to melt, the molecules water provide the heat that is required for this to happen. This process is known as heat latent heat of fusion.
What is specific heat capacity of a substance?
In thermodynamics, the specific heat capacity (symbol cp) of a substance is the heat capacity of a sample of the substance divided by the mass of the sample. Informally, it is the amount of heat that must be added to one unit of mass of the substance in order to cause an increase of one unit in temperature.
What is spray water?
A spray is a jet of small drops of water or liquid vapor.
Is it better to sweep or dust first?
The answer is that you should always dust first and vacuum later. These dust particles will then settle on your floors, sofa, bed, or other surfaces. If you vacuum first and dust later, you’ll find that you miss a lot of the dust in your home. When you dust the particles will settle on your freshly-vacuumed carpet.
How do you reduce dust when sweeping?
How to prevent dust in the home by sweeping the floors. If there are areas where you don’t need to vacuum, use a broom and dustpan to sweep the floors. Wash your dustpan and brush every few months and let them air-dry before storing.
Does salt make water colder?
Salt water can get much colder than that and still remain a liquid. You might remember this from your high school chemistry class—it’s called “freezing point depression,” and it happens because dissolving salt in water lowers the liquid’s freezing point.
Why does the water become colder?
Cold, salty water is dense and sinks to the bottom of the ocean while warm water is less dense and remains on the surface. Water gets colder with depth because cold, salty ocean water sinks to the bottom of the ocean basins below the less dense warmer water near the surface.