Water help: If you are in physics and good at it click here to help please! - Help.com

If you are in physics and good at it click here to help please!

1. Do light objects tend to sink or float? Can something similar be concluded about heavy objects?

A. All light objects float.
B. Weight is not the critical factor; it also depends on volume.
C. Most heavy objects sink.
D. There is a critical mass for each material that determines wether or not it will float

2. A block of aluminum with a volume of 8.5 cm3 is placed in a beaker of water filled to the brim and sinks. water overflows. The same happens in another beaker with a 8.5 cm3 block of lead. The lead will displace (more,less, the same amount of) water than the aluminum block does.

A. less
B. the same
C. more
D. It cannot be determined without a direct measurement.

3. A block of aluminum with a mass of 7 kg is placed in a beaker of water filled to the brim and sinks. Water overflows. The same happens in another beaker with a 7 kg block of lead. The lead will displace (more,less, the same amount of) water than the aluminum block does.

A. less
B. more
C. It cannot be determined without a direct measurement.
D. the same

4. If liquid pressure were the same at all depths, would there be a buoyant force on an object submerged in the liquid?

A. Yes; directed down
B. Yes; but it will be very small.
C. No; buoyant force is the result of differences in pressure.
D. Yes; it is determined by the volume of the submerged object.
E. Yes; it pushes an object out of liquid.

This closed post was written 11 months, 1 week ago | V/U/S: 428, 7, 3 | Edit Post | Report Post

Water, light, Lead, Force, Mass, Pressure, Measurement, volume, Liquid, Sink (How Tags Affect Reciprocity)

dimentieva 0 #
An Unknown Location | 11 months, 1 week ago (6 minutes after post)

The answer to #1 is D

The answer to #1 is D

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ss_army 0 #
An Unknown Location | 11 months, 1 week ago (9 minutes after post)

just tried it and it was wrong

just tried it and it was wrong

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fsafee #
An Unknown Location | 11 months, 1 week ago (34 minutes after post)

1.. it depends on volume as well as weight.. its about density.. if its more dense than the liquid its in.. it will sink

2. the 2 blocks will displace same amount… they are same volume b

3. well alumnium is much less dense than lead meaning if they weight the same then thre is alot more volume of aluminum there. more volume = more displacement, therefore (if the aluminum is fully submerged) the lead will displace less water than aluminum

4. interesting question i first waned to say yes, but no… you need a pressure difference for it to have a buoyant force…

at least this is what i would have put. if u have any questions let me know

1.. it depends on volume as well as weight.. its about density.. if its more dense than the liquid its in.. it will sink 2. the 2 blocks will displace same amount... they are same volume b 3. well alumnium is much less dense than lead meaning if they weight the same then thre is alot more volume of aluminum there. more volume = more displacement, therefore (if the aluminum is fully submerged) the lead will displace less water than aluminum 4. interesting question i first waned to say yes, but no... you need a pressure difference for it to have a buoyant force... at least this is what i would have put. if u have any questions let me know

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ss_army 0 #
An Unknown Location | 11 months, 1 week ago (1 hour, 2 minutes after post)

thanks i got 2,3,4 right and haven’t tried 1 yet, is it C?

thanks i got 2,3,4 right and haven't tried 1 yet, is it C?

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fsafee #
An Unknown Location | 11 months, 1 week ago (1 hour, 9 minutes after post)

it is not A, not C, not D.

its B, like i said its density thats important. density = weight/ volume. it depends on both weight and volume.

c- ‘most heavy objects sink’ is wrong because you can have a veryy large low density object. say… you can get a huge ballooon that weighs 50 pounds… it still will not sink in water because it is less dense than water, no matter how much it weighs.

it is not A, not C, not D. its B, like i said its density thats important. density = weight/ volume. it depends on both weight and volume. c- 'most heavy objects sink' is wrong because you can have a veryy large low density object. say... you can get a huge ballooon that weighs 50 pounds... it still will not sink in water because it is less dense than water, no matter how much it weighs.

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ss_army 0 #
An Unknown Location | 11 months, 1 week ago (1 hour, 20 minutes after post)

yep B was right i misunderstood it thanks for all your help

yep B was right i misunderstood it thanks for all your help

Help me with: I was wondering if they have little chips that you can buy that could track something like a wallet for sale?

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