Science Facts of December - 2015

22

Tuesday

Today’s Science Message

Upcoming party season will challenge you to keep your body weight healthy. But don’t worry. By following small tips, you can enjoy party season without gaining weight. Eating less for lunch on days that you have dinner events, beware of the buffet and filling the half of the plate with salad or vegetables, keep space for healthy deserts such as fruit salads and eating something light before the party to reduce your chances of snacking on high calorie party food will help you to keep your body weight healthy.


21

Monday

Answer for the Question of the Week

For a body to move in a circular path, there has to be a centripetal force (A force directed to the centre).This force is provided by friction between the road and the vehicle. But the frictional force also produces a rotation outward from the bend (felt as the centrifugal force).This tends to throw vehicles out of the bend.When the bend is slanted inward, the normal force of the road does not act through the center of gravity of the vehicle, and produces a rotation in the opposite direction.Now,the vehicle won’t lose track.The inward slant acts as a safety precaution.


18

Friday

Question of the Week

You all have been to the “daha ata wanguwa” atleast once. When riding through the bends have you noticed that the bends are curved inwards?(Well,if you haven’t ,maybe you were busy with nauseating feelings connected with this “roller-coster-like-road”)Do you know the reason for this structure of roads?


17

Thursday

Today’s Science Message

Have you noticed that movie theatres have rough walls?(If so,hope you didn’t blame the masons thinking that they have done a bad job.Actually,that’s the actual way those walls were supposed to be built.) Rough walls tend to diffuse sound, reflecting it in a variety of directions. This allows a spectator to perceive sounds from every part of the room, making it seem lively and full.


16

Wednesday

Today’s Science Message

Have you noticed that a smog form on the surface of your spectacles when entering a hot room after being in a cool room?After being in a cool room your specs would be in a cool temperature.When you enter a hot room, spectacles will absorb heat from the surrounding (including water vapour) to gain room temperature, so water molecules will change from gaseous state to liquid state and settle on the spectacles.This happens when the water vapour pressure is atleast slightly larger than the saturated vapour pressure.


15

Tuesday

Today’s Science Message

Despite of our size,gender or age,all of us are scared of one thing,leeches!A quick way of getting rid of a leech hugging you tightly,is putting some salt on it.Have you ever wondered why the leech falls off then?It’s because water inside the leech move through osmosis(the flow of water moving from low to high salinity) to the surface of the leech’s skin and make it dehydrated.This is an unhappy ending for the leech but at least we get a happy ending.


14

Monday

Answer for the Question of the Week

The density of the human body is usually slightly higher than freshwater.Moreover,when a person drowns, water takes the place of air in the lungs and makes the body heavier and denser.So,it sinks. Then bacteria get to work (bacterial decomposition) and produce gas—methane, hydrogen sulfide, and carbon dioxide.These gasses are trapped inside the body, making the volume of the body larger and the density of the body lesser. When the density becomes less than water it floats.
How long this takes depends on the amount of sunlight the corpse receives ,the depth and temperature of the water.So,this could take days or weeks.


11

Friday

Question of the Week

10

Thursday

Today’s Science Message

Have you ever been “shocked” while going inside a playground slide? Static electricity has done this. When rubbing dry hair with a comb,you will get a similar experience. Hair will get attracted to the comb.When hair rubs on plastic , opposite static charges build up on them. This attracts them , making your hair stand up. Objects with the same charge repel each other. Because the hair have the same charge,your hair will stand on end. Your hairs are trying to get as far away from each other as possible!


9

Wednesday

Today’s Science Message

If you are a sportsman beware!Some prohibited doping agents are included even in some medication given for a leech attack!Getting such substance into your body anyhow,is illegal.
So,why are they illegal?The reasons are,having potential to enhance sport performance,representing potential health risk to the athlete and violating the spirit of sport.(e.g.Anabolic Agents,Beta-2 Agonists)


8

Tuesday

Today’s Science Message

Did you know the secret behind transforming curly hair into permanent straight hair ? Science has revealed the secret! It is a simple example of protein denaturation (change of protein structure to simpler forms).It is done by breaking down disulfide bonds in keratin protein(THE ingredient of hair) in curly hair and rearranging them so the hair is straight. Alkalis are used for this. Now, DON’T experiment applying various household bases (alkalis) on your hair (or sister’s hair),it could be bad for the scalp! Leave it to the professionals.


7

Monday

Answer for the Question of the Week

As time passes, dirt (rust) gather on door bolt locks, hinges and increases the friction between the surfaces. This causes the immobility. When oil is applied, it fills the rough areas and smoothens the surface (Oil doesn’t clean the surface).As a result friction reduces. These substances are called lubricants (e.g. :– oil,wax,grease). Thanks to lubricants, door bolt locks, hinges can get back to work in high spirit!


4

Friday

Question of the Week

When door bolt locks become disobedient and do not latch properly,we get frustrated.So we apply some grease oil on them.After that, the door bolt locks are as good as new!Do you know the reason for this?


3

Thursday

Today’s Science Message

If a water spring emerges suddenly in your garden,don’t be in a hurry to start a drinking water bottle company.It might be a major sign of landslide. 🙁
This can happen when the elevation of underground water gets higher than the Earth’s surface, due to soil movement before a landslide.


2

Wednesday

Today’s Science Message

Do you know that your waist to hip ratio(WHR) shows your healthiness? To be healthy, women should have the ratio <0.8 and men should have <0.9.You can get a rough idea about WHR just by looking at the shape of the body! A person with a healthy ratio tends to have a pear shaped body(less fat in the abdomen),while the others tend to have apple shaped bodies(more fat in the abdomen).


1

Tuesday

Today’s Science Message

Can you guess the most multitasking part of a dog, excluding the brain, of course?

It’s the tongue!It’s a water-lapper, a food conveyor, a register of tastes, a texture sensor, a radiator(As a dog pants,air passes back and forth over the tongue and saliva evaporates from the mouth. This cools down the body), a healer of wounds (by licking, cleans wounds or irritations on his body),and a wet equivalent of a dog’s handshake!( A lick of the tongue = respect of a handshake)