Subject :NSO Class : Class 7
When you put a metal key into its metal lock, you find the key is too tight. Which of the following methods will you adopt to make the key fit properly?
A Heating the key and lock both
B Cooling the key and heating the lock
C Heating the key and cooling the lock
D Cooling the key and lock both
on heating metal contracts and on cooling metal expands
Ans 1:
Class : Class 8
You got the point vice versa. It has to be (B)
Ans 2:
Class : Class 6
Ans 3:
Class : Class 7
yep it should be B . check your description its wrong . metal expands on heating and vice versa. plz help me with my questions too
Ans 4:
Class : Class 7
B
Ans 5:
Class : Class 9
it has to be b
Ans 6:
Class : Class 7
It's B
I am sure