Mark ills a bottle completely with water. The bottle has three sa… - Vidyadip

Question

Mark ills a bottle completely with water.
The bottle has three same sized plugged holes on its wall.
Mark pulls out the plugs and checks the position of the stream of water coming out.

$7.$ What does Mark’s activity show$?$
$A.$ Liquids exert pressure.
$B.$ Liquids contract on cooling.
$C.$ Liquids cannot be compressed.
$D$. Liquids have no deinite shape.
$8.$ Which of these is an example of a contact force$?$
$A.$ A guava falling from the tree.
$B.$ A magnet attracting a hanging iron nail.
$C.$ A plastic comb attracting small pieces of hair.
$D.$ A boat moving on water by the action of wind on its sail.
$9.$ Which of these is true for force$?$
Circle ‘Yes’ or ‘No’ for the correct response.

Is this Correct?	Yes or No
A force can change the state of motion of an object.	Yes/No
A force can change the shape of an object.	Yes/No
A force can act between two solid objects only.	Yes/No

$7.$

$P, Q, R$ and $S$ are four solid objects having the same mass.
Which object is exerting the least pressure on the table$?$
$A. P$
$B. Q$
$C. R$
$D. S$

✓

Answer

$7. A.$ Liquids exert pressure
$8. D.$ A boat moving on water by the action of wind on its sail.
$9.$ Yes
Yes
No
$10. B. Q$

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