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Why do we use a sharp contiuous metla bl...

Why do we use a sharp contiuous metla blade for cutting a mango and a blade with many small teeth fo cutting metals ?

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The shapr teeth concentrate all the force onto oa very small area, resulting in a high pressure which allows it to penetrate into the work piece. Mango is a soft mateiral. So for cutting it we require only small effort. Therefore, we use a continuous pointed edge knife.
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Knowledge Check

  • On a day, when there is plenty of atmospheric moisture, a small soft-stemmed plant cut horizontally near the base with a sharp blade early in the morning. Some dorps of solution ooze out of the cut stem, this comes out due to the

    A
    Transpiration pull
    B
    Positive root pressure
    C
    Negative root pressure
    D
    Negative hydrostapressure gradient

  • Which of the following toos are useful in cutting a small piece of metal?

    A
    Vice
    B
    Hacksaw blade
    C
    Screw driver
    D
    Both a and b

  • If a soft stemmed plant is cut horizontally near the base of its stem with a sharp blade on early morning of a humid day, drops of solution ooze through cut stem. This is due to

    A
    guttation
    B
    bleeding
    C
    transpiration pull
    D
    root pressure.

    • Similar Questions

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    Why do we use knife to cut fruits?

    Why do we use a specific material for making certain articles such as metals for utensils?

    Colligative properties are the physical changes that result from adding solute to a solvent. These depend on how many solute particles are present as well as the solvent amount, but they do not depend on the type of solute particles, although do depend on the type of solvent.Osmotic pressure is a colligative property of solutions that is observed using a semipermeable membrane, a barrier with pores small enough to allow solvent molecules to pass through but not solute molecules or ions Transport in lants,survival of cells, killing of snails and slugs swelling of resin are some examples where osmotic pressure seems applicable in real life situations. An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because

    Rahul, by using a hace salw blade, was cutting metal pipes to supply water to house. What will happen if he starts moving the hack saw blade very fast over the metal, due to lack of time

    Rahul by using a hacksaw blade was cutting metal pipes to supply water to his house. What will happen if he starts moving the hacksaw blade very fast over the metal, due to lack of time.

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