Answer:

Explanation:
As we know that bullet strike the block and fix in it
so here if bullet and box is taken as a system then there is no external force on it
so here the initial momentum of bullet and block must be equal to final momentum of bullet and block
so here we have

now we have




now from above equation we have


True
Inertia depends on mass. Elephant has more mass than a mouse
Answer:
A dekagram is thousand (1000) times larger than a centigram.
Explanation:
→ [1 dekagram = 1,000 centigrams]
→ 1 dekagram = 10 grams
→ 10 grams = 100 decigrams
→ 100 decigrams = 1,000 centigrams