A block of aluminum with a volume of 10 cm 3 is placed in a beaker of water fill

Question

A block of aluminum with a volume of 10 cm3 is placed in a beaker of water filled to the brim. Water overflows. The same is done in another beaker with a 10 cm3 block of lead. Does the lead displace more, less, or the same amount of water?

A. The lead block will displace more water. B. Both blocks displace the same amount of water.    C. The aluminum block will displace more water.

A block of aluminum with a mass of 1 kg is placed in a beaker of water filled to the brim. Water overflows. The same is done in another beaker with a l kg block of lead. Does the lead displace more, less, or the same amount of water?

The lead block displaces more water. The aluminum block displaces more water.     Both blocks displace the same amount of water.

A block of aluminum with a weight of 10 N is placed in a beaker of water filled to the brim. Water overflows. The same is done in another beaker with a 10 N block of lead. Does the lead displace more, less, or the same amount of water?

The lead block displaces more water. The aluminum block displaces more water.     Both blocks will displace the same amount of water.

The weight of the human brain is about 15 N. The buoyant force supplied by fluid around the brain is about 14.5 N. Does this mean that the weight of fluid surrounding the brain is at least 14.5 N?

Yes or No    

A half-filled bucket of water is on a spring scale. Will the reading of the scale increase or remain the same if a fish is placed in the bucket?

The reading on the scale will remain the same. The reading on the scale will increase.    

What if the bucket is initially filled to the brim?

The reading on the scale will increase. The reading on the scale will remain the same.    

In the hydraulic arrangement shown, the larger piston has an area which is fifty times that of the smaller piston. The strongman hopes to exert enough force on the large piston to raise the 10 kg that rest on the small piston.

Do you think he will be successful?

Yes or No    

Explanation / Answer

1.B because both have density more than water. so both sink and having same volume.

2. B because aluminium block has leeser density compated to lead so for same mass aluminium would have larger volume so alumimium displace more water

3. B because weight being same so mass also same so similar to 2nd case. aluminium will displace more water

4.no, not necessarily as it represents the fluid displaced

5. increase because fish weight is added up

6. increase as it sinks and starts swimming so its density must be more than water

7. no because he has to apply force equal to 500kg force which is very very difficult

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