The magnifying glass uses a convex lens.Therefore,when beams of light passes through the lens,it will be focus onto a focal point.As the tip of the matchstick is made up of flammable chemical,a single point of light will cause the temperature to be high enough to have a chemical reaction with the matchstick,thus lighting it up.
1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?
The smaller the angle,the more images there are.Therefore,there will be more than two images forming on the mirrors.It is because when there more lights bouncing beween the mirrors,more images will be formed.
2) What happens to the images of this angle if it is bigger than 90(degrees)?
If the angle is bigger than 90 degrees,different views of the object will be formed.
3) How do mirrors produce funny images?
It produces funny images because when lights are being reflected on them,it will be reflected into another direction,therefore people are able to see themselves in weird shapes and sizes.
Microwaved food is believed to contain microwaves. How safe is microwaved food ?
Microwaved food are one of the main causes of diseases.However,most people have ignored that fact over the years.
To know if microwaved food is safe,we need to know how the food is cooked in the microwave.A microwave oven cooked food by agitating the water molecules in the food,causing them to vibrate,which produces heat.Therefore,bacterias are destroyed by the heat,which is one of the good point of microwaved food.
However,it also poses quite a number of dangers to the consumers.One of the biggest dangers is their lack of nutritional value.Food that are cooked in microwave tend to lose water.Therefore,they also lose a lot of their nutrients and minerals.
Toxic also may leeched out into the food during cooking and it may be potentially harmful to the consumer.As more and more people are getting busy,they tend to pack their food.One of the most common type of container that are use for packing microwaved food is plastic container and it may affect the chemical composition of the cooked food,which may results in harming the consumers.
In my opinion,microwaved food is still safe to be consumed.As long as we consume these type of food once in a while,there should not be any problems happening to us.
Below is a video on how food is cooked in a microwave oven.
1.Male seahorses do not get pregnant.They do not produce the egg by themeselves.They receive an agg sac from the female then the male carries it in a pocket like a kangaroo.It will takes week for the male to fertilize the egg as it is waiting for the right moment to ensure that its offspring has the graetest chance of survival.When the moment is right, the male will eject the offspring from his pocket. 2.Sound travel 15 times faster through steel than through the air because the denser a substance,the faster the sound will travel.Just like how different molecules in the gas affect the trasmission of the sound. 3.The purpose to blinking is to fill our eyes with moisture,so it will not be too dry. 4.It involves 34 facial muscles & 112 postural.
The modern world is an electrified world with things like computers and televisions and so on.But they are nothing compared to the the light bulb,which has greatly changed human existence by illuminating the night and making it easier for us to do a wide range of activities. The electric light,that mostly affects our lives, was invented in 1879 by Thomas Alva Edison.
The scientific concept behind the light bulb is to use electricity to heat a thin strip of filament until it gets hot enough to glow.An electric current will pass through the filament,heating it, to produce light.The enclosed light bulb will also help to prevent oxidation of the hot filament.
I feel that the invention of light bulb is fascinating because it helps us in a lot of different ways and I am sure that without it,our life will be very different.
