kerosene has got higher ignition temperature.
wood,leaves,paper
This would be done by shaving off some of the wood to make the pitch higher and adding more wood to make it lower.
Like most woodwinds, the lower-end instruments will be made of plastic and the higher-end or professional ones are made of wood. This is done because in general plastic is tougher to break than wood. There is also a large difference in cost between plastic and wood instruments, especially with the bassoon.
often plastic. However originally and currently for higher quality instruments as the name implies from wood. Top clarinets such as my Le Blanc are made from Black African Rosewood.
The harp player plucks a string and it vibrates at a certain frequency, depending on the length of the string. The shorter the string, the higher the pitch. The volume can be determined on how hard the string is plucked. The harp is made of wood because wood resonates well. A pedal can be attached in order to make each string higher by shortening it by a certain amount.
kerosene
It is difficult to ignite wood or coal using a lit match. The match would burn down and singe your fingers long before the wood or coal would light. Using kindling of dry wood shaving, or thin twigs and dry grass, or paper (with or without kerosene), will ignite with one match and burn long enough to light a fire of wood or coal.
because there ignition temp. is less
300 degrees
The wood will not catch fire until it reached its combustion temperature. If at a lower temperature, the wood will simple smoulder, giving out smoke without a flame.
The ignition temperature is about 250 Celsius for ordinary wood.
This is because the specific heat capacity of the wood is more than the kerosene oil. So, the wood takes time to burn but burns for longer period than the kerosene oil.
There want be much of a difference in the temperature.
Kerosene is not needed to burn wood. If you use a layer of scrunched up newspaper, some small kindling on top of the paper, and progressively larger pieces of wood as the fire is starting, no kerosene or other product is necessary if the wood is seasoned and dry.
For Burning wood:The temperature for the piloted ignition of wood is typically about 350 °C (660 °F), whereas the spontaneous ignition requires a temperature of approximately 600 °C (1100 °F)http://virtual.vtt.fi/virtual/innofirewood/stateoftheart/database/burning/burning.html
Large chunks of wood are difficult to start burning. Kerosene OTOH lights up easily. So a splash of kerosene is a simple way - but a bit dangerous - to get a fire going.
No, although the answer does depend on the temperature scale being used.Most materials have a temperature, the autoignition point, at which they will spontaneously ignite without the need of an external source of ignition. For wood this is around 300 deg C although the exact value will vary from one species to another. At this temperature cellulose, which is present in all wood, starts to disintegrate and releases hydrocarbons. These react with the oxygen in the air and cause ignition.