Subject :NSO Class : Class 3
Roy wants to make a list of actions that show friction produces heat. Which of the following could he include in his list?
(A) Rubbing hands together
(B) Scratching a match stick against the box
(C) Sawing wood
(D) Drilling a hole into metal sheet
(E) Rubbing off some pencil marks with an eraser
A (A) and (E) only
B (A), (B) and (E) only
C (A), (B), (C) and (E) only
D (A), (B), (C), (D) and (E)
Ans 1:
Class : Class 4
Sawing wood means Seeing wood then how it cause friction of heat.
Ans 2:
Class : Class 5
yes or no ????????????????
Ans 3:
Class : Class 5
The correct answer is c part.All the statments are correct
Ans 4:
Class : Class 5
The correct answer is c part.All the statments are correct
Ans 5:
Class : Class 3