Science Quiz 20

1. Christopher Cockerell: Hovercraft 
2. David Bushnell: Submarine 
3. J.C. Perrier: Steamship 

Select the correct answer using the code given below:

1. The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitude. 
2. Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading. 

Which of the statements given above is/are correct?

Choose the correct option.

1. Steam at 100° C and boiling water at 100° C contain same amount of heat. 
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water. 
3. In an air-conditioner, heat is extracted from the room-air at the evaporator coils and is rejected out at the condenser coils. 

Which of these statements is/are correct?

1. Overturn about its outer wheels 
2. Overturn about its inner wheels 
3. Skid outwards 
4. Skid inwards 

Which of these statements are correct?