Jump to content

Primarygun

Senior Members
  • Posts

    1338
  • Joined

  • Last visited

Everything posted by Primarygun

  1. Yes. That's a basic concept. In electrolysis, composition of chemical is also a factor which affects the outcome of both electrode, cathode and anode. I haven't learnt that yet, maybe next year. Can't give you any examples. By the way, what kind of electrode and substance are used to displace potassium from its stable compound into a potassium metal ?
  2. Yes. That's a basic concept. In electrolysis, composition of chemical is also a factor which affects the outcome of both electrode, cathode and anode. I haven't learnt that yet, maybe next year. Can't give you any examples. By the way, what kind of electrode and substance are used to displace potassium from its stable compound into a potassium metal ?
  3. The weight of an object is a force due to gravity towards the centre of the earth. Normally, it is perpendicular to the ground. It is fundatmental and continuous force. About the normal force.... When you stand up, you are not pulled by the strong fundatmenal gravitional force. According to Newton First Law, there is no net force. Obviously, that force acts against the gravitational force is the force by the ground. It is a reaction force which maintain your equillibrium and it is passive, so it is called normal force. Actually, it is a kind of electromagnetic force. Down a slope, there is a force from the surface of that pyramid. That's the normal force. Fancy without this force, the object will go into the pyramid since there is a net force.
  4. The weight of an object is a force due to gravity towards the centre of the earth. Normally, it is perpendicular to the ground. It is fundatmental and continuous force. About the normal force.... When you stand up, you are not pulled by the strong fundatmenal gravitional force. According to Newton First Law, there is no net force. Obviously, that force acts against the gravitational force is the force by the ground. It is a reaction force which maintain your equillibrium and it is passive, so it is called normal force. Actually, it is a kind of electromagnetic force. Down a slope, there is a force from the surface of that pyramid. That's the normal force. Fancy without this force, the object will go into the pyramid since there is a net force.
  5. What's chem 101? I'd think the burning magnesium would give a magnesium oxide. Pouring water onto it, it will break down into ions and the pure magnesium metal is exposed to water. Magnesium is not very reactive with water. I think it slightly form magnesium hydroxide
  6. What's chem 101? I'd think the burning magnesium would give a magnesium oxide. Pouring water onto it, it will break down into ions and the pure magnesium metal is exposed to water. Magnesium is not very reactive with water. I think it slightly form magnesium hydroxide
  7. A gallon of petroleum is said to be much more cheaper than one gallon of water. Why don't you have someone buy it for you at once?
  8. Cell membranes are usually selectively permeable and allow small molecules passing through it by means. Glucose can passes through it.
  9. Usually small molecules, like glucose
  10. Is the FBI department able to hear this message?
  11. OK. In reality, how do we know a new substance's molar mass?
  12. If you still can't get it, you may draw a picture with details to ask more clearly. That's better.
  13. Did he mean 87.5% of the number of particles or 87.5% of the mass of the particles?
  14. In brief, when you throw something with horizontal force applied, it moves away you and reach the ground. On the other hand, you let an object falling vertically. The times required for them to reach the ground are the same ( neglect air resistance).
  15. Primarygun

    Radian

    How does radian bring convenience to us? Could anyone tell me?
  16. Dissolve to form carbonic acid?
  17. sorry. Indeed , the first question I asked is very vague. Thanks matt grime for clarifying the question again. Ya. The second question has solution by arrangement. The second question is taken from maths olympics. It is designed for students who are aged below 17. The first is for below 12.
  18. In a equation, for two different types of composition, Let z% be the composition of x and (100-z)% be the composition of y. The new weight=[xz+y(100-z)]/100
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.