Question

Fill in the blanks.

1.The effect the effect of pressure depends upon______________.

2. The substance used toreduce friction are called as __________.

3. If the yam melts in a flame, then it is ____________ fibre.

4. The thin foil of ___________ metal is used for decorating sweets.

5. The number of vibrations produced per second is known as _____________.

6. The alphabet that doesn't suffer lateral inversion is ___________.​

Answer 1

Answer:

1. Area and Force

2. Anti - Frictant

3. Synthetic

4. Aluminum

5. Frequency

6. N

Answer 2

Required Answer:

Fill in the blanks-

1. The effect of pressure depends upon force and area.

→ The effect of pressure depends upon the area exerted by the object and force.

• More the force, more the pressure will be.

• If area is less , pressure will be more.

• If area is large , pressure will be less.

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2. The substance used to reduce friction are called as lubricant .

→ Lubricants are used to reduce the friction. Some of the examples of lubricants are powder, oil.

____________________________

3. If the yarn melts in a flame, then it is combustible fibre.

→ Combustible fibres are those that can burn in the air. Since, yarn can melt in a flame and results in combustion, then it is a combustible fibre.

____________________________

4. The thin foil of silver metal is used for decorating sweets.

→ Metals are hammerd into thin sheets to make foil. Silver is the most malleable metal after gold. So, it is used for decorating sweets.

___________________________

5. The number of vibrations produced per second is known as frequency .

→ Frequency is defined as the number of vibrations produced per second. SI unit of frequency is Hertz.

Note : Reciprocal of frequency is time period.

________________________

6. The alphabet that doesn't suffer lateral inversion is X .

→ There are many english alphabet that don't suffer lateral inversion. They are :- X , W , T , U , I , O , H , A ,M, V.

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