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  GalaxieMauve7697

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  Secondary II • 2yr.

  Question to all Sec 2 students :

  Is there a specific notion in science that you HAVE to master in order to passe your blocage horaire ?

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  DiamantGamma237

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  Postsecondary • 2yr.

  Hello there, l had a question:

  How come roaches are immune to Radiation and waves, such as micro-waves?

  Radiation literally means the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei. Disintegration... How are roaches not disintegrated? Are they NOT made of atoms?

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  R2D2Fiable3240

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  Secondary II • 2yr.

  Bonjour, je me demande la difference entre un mélange hétérogène et homogène.

  Science

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  FreeMoose6435

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  Secondary I • 2yr.

  are water and sugar missible

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  CarboneMirifique7131

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  Secondary IV • 2yr.

  Bonjour, je n’est pas compris cet exercise sur l’électricité statique

  

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  KaminoExemplaire2442

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  Secondary IV • 2yr.

  Bonjour, nous avons un laboratoire sur les concentrations demain et on nous dit « Vous devez rédiger le rapport de laboratoire dans le but de préparer 50ml de solution À à 18000 ppm et de 100 ml d’une solution B à 0,115 mol/L avec un soluté qui est le C12H22O11. Tu dois utiliser de l’eau distillée pour faire les deux solutions. »

  
  

  Est-ce que quelqu’un pourrait m’aider à calculer la concentration de la solution B svp?

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  ArgentKappa1223

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  Secondary I • 2yr.

  Je ne comprends pas le numéro A calcule la valeur de la plus petite division de chaque cylindre.

  

  Ce contenu est protégé par le droit d'auteur. Toute reproduction à l'extérieur des forums Alloprof est interdite et pourra être considérée comme une violation du droit d'auteur.

  

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  LithiumEmpathique544

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  Secondary IV • 2yr.

  Quelqu’un a un truc pour apprendre les formules des ions polyatomiques? Je dois seulement savoir hydroxyde, nitrate, phosphate, carbonate, sulfate et ammonium. Ma seule option semble être le par cœur…

  

  Ce contenu est protégé par le droit d'auteur. Toute reproduction à l'extérieur des forums Alloprof est interdite et pourra être considérée comme une violation du droit d'auteur.

  

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  PhilosophicalAnt2817

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  Secondary IV • 2yr.

  What is the kinetic energy calculation

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  AgileWolf7517

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  Secondary II • 2yr.

  pover vous m'aider a ordone en taille svp en ordr croissant :

  
  

  cellue chromosome noyau et gene mrci

  

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  CygneNoble4319

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  Secondary IV • 2yr.

  Bonjour! Je ne sais pas vraiment comment le faire…

  

  Ce contenu est protégé par le droit d'auteur. Toute reproduction à l'extérieur des forums Alloprof est interdite et pourra être considérée comme une violation du droit d'auteur.

  

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  FastFox1311

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  Secondary III • 2yr.

  Good evening,

  
  

  Can you show me how to solve a complete dilution problem? I have a lot of difficulty with that!

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  RobotLibre9516

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  Secondary II • 2yr.

  Hey !

  What's the difference between an animal cell and a plant cell.

  Thanks in advance!

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  DeltaPotassium727

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  Secondary I • 2yr.

  Hello! Is the movement of a hand on a clock helical or  a rotation? I don’t understand these two movements, can I have examples of the 2 please?

  Thank you!

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  DeltaPotassium727

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  Secondary I • 2yr.

  Hello!

  What does it mean when litmus paper does not change color? Thank you!

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  DeltaPotassium727

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  Secondary I • 2yr.

  Hi,

  In my homework, I have to find an example of something acidic and something basic, can you give me some examples?

  Thank you !!

  Science

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  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

  What is the atmosphere composed of and how do humans affect its composition? Thanks a lot!

  Science

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  NaiveAbafar3712

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  Secondary I • 2yr.

  I don't understand the logic of the periodic table. Why does it have this weird shape? Why not just a rectangle? How come the items are classified like this?

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

  Hello,

  I don't understand the difference between each of these terms: atom, molecule, element and compound.

  Can you help me ?

  Thanks

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  FastFox1311

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  Secondary III • 2yr.

  Hello, what's the difference between malleability, elasticity and ductility?

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  FastFox1311

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  Secondary III • 2yr.

  Hello,

  Could you explain to me how forces operate on objects and the consequences they can have on them?

  Thank you so much!

  Science

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  1 answer
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  FastFox1311

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  Secondary III • 2yr.

  Hello,

  I am having difficulty with the guidings, could you explain to me how it works please?

  Thank you so much!

  Science

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  1 answer
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  FastFox1311

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  Secondary III • 2yr.

  Hello :)

  I have trouble understanding the characteristics of the links and understanding what is what (elastic or not, indirect or not, removable, etc.). Can you help me?

  Thanks :)))

  Science

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  1 answer
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  FastFox1311

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  Secondary III • 2yr.

  What is dimensional tolerance and what is the ± (+/-) symbol in technical drawings?

  thankss

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  FastFox1311

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  Secondary III • 2yr.

  Hello!

  I have a lab tomorrow and I have to write a protocol for the dissolution that I have to do, where I have to use a 50 ml volumetric flask and I have to make a concentrated solution of 0.08 g / ml of NaCl. First, how do I calculate the mass of NaCl? Then, can you give me some tips for writing my protocol ??

  Thank you !!!

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  FastFox1311

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  Secondary III • 2yr.

  Hello,

  Could you explain to me what a dissolution is? I am not sure I understand.

  Thank you so much!

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  1 answer
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  FastFox1311

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  Secondary III • 2yr.

  Hi!

  How do we know if we have a homogeneous or heterogeneous mixture? Also, in which of these 2 categories does a colloid fit?

  Thanks already!

  Science

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  1 answer
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  HumbleArmadillo3023

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  Secondary III • 2yr.

  Hello,

  I'm having a hard time figuring out what a cut and section are when it comes to technical drawings. Could you please explain it to me?

  Thank you so much!

  Science

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  1 answer
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  HumbleArmadillo3023

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  Secondary III • 2yr.

  Hi!

  In my science homework, I am asked to reproduce a drawing at 2:1 scale, but what does that mean?

  Thanks :))

  Science

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  1 answer
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  HumbleArmadillo3023

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  Secondary III • 2yr.

  Hi,

  How do I find the best possible orientation for a cut-through view?

  Science

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  1 answer