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  ShyMoon4957

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  Secondary III • 3yr.

  Someone throws a huge 300 kg object into a 40,000 L swimming pool without any splashes being produced. The pool’s volume is measured afterwards, thus showing that it reaches 45,000 L. What is the density of the object? Help !?!

  Science

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  1 answer
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  FastFox1311

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  Secondary III • 3yr.

  Hello! Must I measure a solid with a ruler to determine its density ? I no longer remember :(

  Science

  0

  1 answer
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  SweetCrocodile1896

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  Secondary III • 3yr.

  Hi, how come oil floats on the water? Thank you for explaining this to me 🙂

  Science

  0

  1 answer
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  SweetCrocodile1896

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  Secondary III • 3yr.

  Hi!

  What causes one substance to have a higher density than another? thank you

  Science

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  1 answer
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  SweetCrocodile1896

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  Secondary III • 3yr.

  Hello,

  I have to find the density of a solid for my science lab, but don't know how to do it. Can you explain me how, please?

  Thanks a lot!

  Science

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  1 answer
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  SweetCrocodile1896

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  Secondary III • 3yr.

  Hi! I have a lab this week on the density of gases, liquids, and solids.

  I understand that for the liquids I can weigh and measure the volume, but I have two questions:

  1) how do I measure the mass of a gas?

  2) how do I measure the volume of a solid?

  thanks in advance :))

  Science

  0

  1 answer
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  SweetCrocodile1896

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  Secondary III • 3yr.

  Are all the material properties advantageous? For example, why is fragility an advantage?

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  Hello,

  I can't seem to understand how energy can manifest naturally. Can you explain to me how it manifests please?

  Thanks a lot!

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  Hello,

  I can't figure out what the motion transfer mechanisms are used for and what the mechanisms are. Can you help me please!

  Thanks a lot!

  Science

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  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  Hello,

  Can you explain how to use the periodic table please? I can’t use it correctly.

  Thanks a lot!

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  Hi,

  I'm not sure why not all atoms are molecules (and why molecules aren’t necessarily atoms)? Also, what is the difference between a molecule and a composite substance?

  Thanks

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  How do you know if a particle is an atom or a molecule?I'm not sure I understand...

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  Hello,

  In my assignment I have to differentiate the atoms from molecules and the elements from compounds, but I can't do it. Can you explain to me how I can tell them apart?

  Thank you so much!

  Science

  0

  1 answer
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  ZenZombie9054

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  Secondary III • 3yr.

  What is the difference between a force, a constraint, and the consequences of the effects of a force?

  Science

  0

  1 answer
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  ZenZombie9054

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  Secondary III • 3yr.

  Hey,

  
  

  What's the difference between linkage and guiding?

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 3yr.

  What constitutes and doesn’t constitute a color change in a chemical reaction?

  Science

  0

  1 answer
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  AdorableMoose4991

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  Secondary I • 3yr.

  Good morning! I have a hard time distinguishing the lithosphere, the continental lithosphere, the oceanic lithosphere, landforms and the natural resources of the lithosphere. Can you help me?

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 3yr.

  hi! What distinguishes the biosphere, hydrosphere, lithosphere, and atmosphere?

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 3yr.

  Good morning!

  How do you tell plant and animal cells apart with a microscope? Thank you!

  Science

  0

  1 answer
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  AdorableMoose4991

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  Secondary I • 3yr.

  Hello! I have a hard time using the microscope. Can you explain how to use it and give me some advice?

  Science

  0

  1 answer
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  AdorableMoose4991

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  Secondary I • 3yr.

  Hello, 

  
  

  I know that a doorknob has a bi-directional rotational motion, but I don't know how to draw this type of movement. Can you help me please ?

  Science

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  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello,

  I am having a hard time with the motion transformation mechanisms. Could you explain them to me please?

  Thanks a lot!

  Science

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  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello,

  I had a genetics class today, but I didn't really get it. Can you explain it to me again?

  Thanks a lot!

  Science

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  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello,

  What's the difference between prokaryotic and eukaryotic cells? 

  Thank you

  Science

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  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hi,

  
  

  Why do the leaves change color in the fall? Why does the green disappear?

  Good evening

  Science

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  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello! Can humans and plants do both photosynthesis and cellular respiration?

  Thank you :)

  Science

  0

  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello,

  I can't seem to understand how energy can manifest naturally. Can you explain to me how it manifests please?

  Thanks a lot!

  Science

  0

  1 answer
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  GrenatResponsable523

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  Secondary II • 3yr.

  Hello,

  I can't understand the difference between renewable and non-renewable natural resources. Can you explain it to me please?

  Thanks a lot!

  Science

  0

  1 answer
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  NaiveAbafar3712

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  Secondary I • 3yr.

  How does temperature vary with the atmosphere’s altitude? Thank you

  Science

  0

  2 answers
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  NaiveAbafar3712

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  Secondary I • 3yr.

  Can an object guide and link at the same time?

  Science

  0

  1 answer