12. Light and sound

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12. Light and sound Fill in the blanks.  1. Objects which cannot give out their own light are called Non - luminous.  2. Trandparent   object allow light to pass through them completely.  3. Reflection   is bouncing back of light from a smooth shiny surface.  Write true or false.  1. Sound does not require any medium to travel. (F)   2.The sound of loudspeaker is an unpleasant sound. (T)  3.sound travels through air in the form of particles. (F)  Let us practise 1. Fill in the blanks.  a. Noise is produced by irregular    sound waves.  b. Sun is the main source of heat and light on earth.  c. When light hits a surface and cannot pass through it, the surface is called opaque.  d. Sound is produced due to vibration of objects.  2 . Write 'T' for true and 'F' for false.  a. Honking car is an example of a pleasant sound. (F)  b. Light cannot bend around the cornera. (T)   c. Wat...
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Basic computer gk questions with ans

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Basic computer gk questions

1.who invented the first mechanical computer? 
Ans. Charles babbage 

😊Charles babage also known as father of computer. 😇


2.who is called live wires ? 
Ans. People who work with computer they are called live wires. 

3.what are the 6 main components of the computer? 
Ans. 1.storage unit
2.control unit
3.Input unit
4.output unit
5.Arithmetic logic unit (ALU) 
6. Central processing unit(CPU) 

4.How many bits are in a single byte ? 
Ans. Eight bits (8 bits) in a single byte. 

5.what was the first version of windows called? 
Ans. Interface manager

6.which programing language was used by the first generation computer? 
Ans. The machine language. 

7.Name the computer programming languages? 
Ans. Computer programming languages are 
C, C++, c#, java, PHP and python. 

8. Which is name of the software that allows us to browse the internet? 
Ans. Browser

9.which company made the windows operating system? 
Ans. Microsoft corporation

10.what is Application software? 
Ans. Application softwares are 
MS Excel , MS PowerPoint and MS word










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