Questions about science...?

Question

Hi- I have some questions about science.

-How does blubber help orca(whale) live in ocean?
-What happens to the water molecules in clothe(wet clothe) after the water evaporate?
-The effect earth atmophere has by coal burning
-and can you tell me what's kinetic energy and potential energy in a easy way? can you give some examples of these enery?

^_^

Answer 1

The first question has been answered well by others. I will try to give you good answers for the remaining three.

The water molecules in the clothes only make the clothes wet. So, when the water evaporates, the water molecules go out into the atmosphere. Humid air and still air make the rate of evaporation less. On the other hand, dry air, hot air and a good breeze help in faster evaporation.

Coal burning produces carbon dioxide, carbon monoxide and sulphur dioxide etc. Carbon dioxide is a green house gas and adds to the global warming. Sulphur dioxide causes acid rains.

A tightly wound spring is a case of potential energy and when released, it unwinds with a good amount of motion. Any object moving will have kinetic energy E = 1/2.m.v^2 where m is the mass and v is the velocity of the object. If an object is raised to a height h above the ground, it will have a potential energy E = m.g.h where m is the mass, g the acceleration due to gravity and h is the height. When the object is dropped from that height h, it develops a velocity v given by E = m.g.h = 1/2.m.v^2 or v^2 = 2.g.h and v = sqrt.2gh

There are different potential energies such as gravitational, electrical and chemical. But kinetic energy is related to the motion of a body.

Stored water in a dam is an example of potential energy and the same water when let out through a gate into a channel flows and has kinetic energy. The water drops in the cloud have potential energy and when they condense and start falling, the potential energy is converted into kinetic energy. I hope it is clear now.

Answer 2

err lets try this..
How does blubber help orca(whale) live in ocean? Well the blubber provides a natural insolant, helping it keep in heat..and cold out.
-What happens to the water molecules in clothe(wet clothe) after the water evaporate?Im sure they go back to normal

-The effect earth atmophere has by coal burning. Well pollution of the air of course.. and supposebly "green house effect" creates a layer which blocks out the sun.
-and can you tell me what's kinetic energy and potential energy in a easy way? can you give some examples of these enery?
Kinetic energy is energy in motion?( been a while)
Potential energy is the energy stored up for a motion..
Not 100% sure about those answers

Answer 3

Ok here's the deal.

Blubber provides insulation and flotation to whales, since they don't have fur, feathers or a jacket and they are always wet, plus they live at the north pole.

WET CLOTHES: Water molecules turn into water vapor (steam) which is an invisible gas, if the air around the wet item is dry and it's even a little bit warm.

COAL BURNING: Burning of coal release heat energy, along with many gases such as Co2, Co or carbon monoxide, and variouls oxides of nitrogen and sulfur, etc. Many of these gases and solids are poisonous to humans sulfur dioxide and rain water makes acid rain and will ruin a nice hairdo. Certain types of coal are "dirtier" than others and certain incinerators burn cleaner than others. The main coal types are bituminous, anthracite and lygnite, some are better some are worse.

Kinetic energy is an object in motion if your car is rolling down a hill it has kinetic energy and you have to remove that energy to stop it, if you step on they brakes the brakes turn the kinetic energy into heat, the brakes disks get hot. If you hit something it causes damage or you can step in front of it and use your muscles (not recommended), do not try at home.

Potential energy is the same as the energy stored in the coal in the above example, other examples are gasoline in your car you change that into kinetic energy as the car drives then you turn it into heat energy in the brake disks.

The thing to remember is Newtons first law of energy:
Energy cannot be created or destroyed only it's form can be changed, burn gas, turn it into kinetic energy and then hit the brakes and turn it into heat energy, then the hot disks evaporate the gutter water on the rotors of your brakes then the water vapor turns into clouds and causes a rainstorm in Hawaii.

It's all related!!!

Answer 4

Why would you go with to try this? What an evil mummy! i do no longer likely know what you may desire to ask a instructor with regard to the subject because it is the instructor conversing approximately your daughters progression and habit. this would be what your daughter is discovering and is A* conventional. 2 copies are mandatory of a defective allele to have cystic fibrosis. this skill that the allele is.. Recessive. Is that what you propose by making use of question?