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How do flame retardants prevent fires?
Flame retardants reduce the spread of fire on a material by raising the temperature at which it will burn. There are several physical chemistry approaches to reducing flame spread, but see the wikipedia article for more details.
Why is vertical flame spread more rapid than horizontal flame spread?
The heat from a fire in the vertical spread is traveling upward and preheating the fuel about to be burned; whereas in horizontal spread, most of the convective heat is escaping into the atmosphere. Only the radiant heat is warming the material to the side.
How long doest take to boil water on a blue flame?
the lager pot will because it has more surface exposed to the heat.
Which carries more energy light from a sodium flame a copper flame or a barium flames?
The copper flame has a more energetic radiation.
Does a yellow flame produces more energy or does a blue flame?
yellow
How do flame retardants prevent fires?
Flame retardants reduce the spread of fire on a material by raising the temperature at which it will burn. There are several physical chemistry approaches to reducing flame spread, but see the wikipedia article for more details.
Why is vertical flame spread more rapid than horizontal flame spread?
The heat from a fire in the vertical spread is traveling upward and preheating the fuel about to be burned; whereas in horizontal spread, most of the convective heat is escaping into the atmosphere. Only the radiant heat is warming the material to the side.
Why is a catalyst spread over a large surface area?
So it is more efficient.
Why do roots spread out and get thinner?
they spread out and cover a large surface area which helps the roots take in water from the soil more quickly.
How long doest take to boil water on a blue flame?
the lager pot will because it has more surface exposed to the heat.
Why do roots spread out instead of just growing downward?
They spread out so they cover a greater surface area. This means they can take in more water.
Why does a blunt pin require more pressure than a sharp pin?
There is more surface area so the force is spread out more
Why does a drop of oil placed on the surface of water spread over the entire surface?
because the water has more density than the oil so the oil spreads only on the surface.
Why do skis have a larger surface area?
The larger the surface area the more pressure can be spread out, therefore it is less likely to fall through the snow. As pressure = f / a.
Which flame has more heat a steady blue flame or a yellow flame?
Blue flame. because it does not have carbon
Which carries more energy light from a sodium flame a copper flame or a barium flames?
The copper flame has a more energetic radiation.
Is the blue flame hotter than yellow flames?
A blue flame is hotter than a yellow flame because a blue flame has more oxygen, so it has more energy to create extra heat. Therefore, a blue flame is more dangerous and a yellow flame is used in laboratories. The hottest part of the blue flame is right under the middle, this part is called the crown !!
