Worksheet(fa3 9th) 693i1r

Worksheet On Pressure & Floatation Class – Ix Subject – Science Time : 10 Min Activity / Demonstration Based Worksheet Consider these liquids: Liquid A, 2.43 g/mL; Liquid B, 1.0 g/mL; Liquid C, 0.87 g/mL.

M M : 10

How will these liquids stack top to bottom?(mark in the figure) What is Liquid B?_________________ A 1.75 g/mL object is dropped into the density column. Where will it end up?______________ Where would a piece of ice end up? (Density of ice = 0.92 g/mL) _______________ (3 marks) Draw the path of the flow of In the demo, what will happen to the water when allowed to fall from upper scale when the mass is the opening A and B of the bottle submerged. (1 mark) as shown in the figure. scale reading increases (1 mark) scale reading decreases no change

If you were using the book to help press a stamp onto an envelope, the position of book in the which picture would be more effective. Give reason for the answer. (1 ½ + 1 ½ = 3 marks) (i) pic. – 1 / pic. – 2 Reason__________________ ________________________

(ii) pic. – 1 / pic. – 2 Reason___________________________________________ ____________________________________________________

A student weighs two cubical blocks X and Y, made from the same metal, first in air and then in water, as shown. He notes the differences in the two readings for each of the two blocks and labels them as Bx and By. He would find that (1 mark) a) volume of ‘X’ is more than volume of ‘Y’ b) weight loss in ‘X’ is more than weight loss in ‘Y’ c) buoyant force on ‘Y’ is less than buoyant force on ‘X’ d) all of the above

A spring balance is used to record the weight of a small iron cube in three different set ups as shown in the figure. If his three readings taken in this order are W1, W2 and W3, he is likely to observe that – (i) W1 ----- W2 (ii) W2 ------ W3 (1 mark)

Extra questions  Archimedes was charged with determining if a crown was pure gold. One method he may have used: suppose he balanced the crown with a lump of pure gold outside water. After immersing, the balance tipped as shown. The crown must: a. Be denser than gold b. Be less dense than gold

Three cubes of the same size and shape are put in water. They sink. One is lead, one is steel and one is a dense wood (ironwood). rlead > rsteel > rironwood. The bouyant force is greatest on the _______ cube c. lead d. steel e. wood f. same buoyant force Two cubes of the same size and shape are immersed in water. The iron cube sinks, but the walnut cube floats. The bouyant force is greater on which cube ?

Decide if the following objects will float or sink in water. Wood, .59 g/mL _________ Clay, 1.86 g/mL _________ A 300 gram boat displaces 400 mL of water. How much cargo can it carry and still float? A 400 gram boat displaces 300 grams of water. Will it sink or float? ___________ What is more dense a steel boat or a block of steel? A 150 gram object displaces 125 mL of water. Will it sink or float? __________ A hot air balloon has a mass of 6,000 kilograms. How much air will it need to displace to be able to float?