Question
Mayank dropped four coins from the same height onto a concrete floor.
The table below shows the type of sound that each coin produced after hitting the floor.
$9.$ Which coins in Mayank’s activity are made of metal$?$
$A.$ Coin $1$ and Coin $2$
$B.$ Coin $2$ and Coin $3$
$C.$ Coin $3$ and Coin $4$
$D$. Coin $4$ and Coin $1$
$10.$ On which type of loor will Mayank’s activity produce the same results$?$
$A.$ Glass
$B.$ Sand
$C.$ Grass
$D.$ Carpet
The table below shows the type of sound that each coin produced after hitting the floor.
| Coin | Temperature of the ball when heated for a minute |
| Coin $1$ | Ringing sound |
| Coin $2$ | Damp sound |
| Coin $3$ | Damp sound |
| Coin $4$ | Ringing sound |
$A.$ Coin $1$ and Coin $2$
$B.$ Coin $2$ and Coin $3$
$C.$ Coin $3$ and Coin $4$
$D$. Coin $4$ and Coin $1$
$10.$ On which type of loor will Mayank’s activity produce the same results$?$
$A.$ Glass
$B.$ Sand
$C.$ Grass
$D.$ Carpet
