gwiyomi17

Yes, you were right, I think simple things will make me understand big things. I'm reading yesterday about how to make gliders. Its true that I need to know first all the physics behind it before I make one. Thanks this really helps a lot! Thanks! I enjoyed this, and it help me understand.

I think its too simple for a physics project???

Hi, I have a glider project, but I have no idea on how to do it. I need to do my own design. The glider that I need should travel greater that 5 meters, and should travel in a straight line. I tried to make one but its always make turns and travels with a shorter distance. I don't know what are the functions of each part of the glider, or what are the causes why its like that. Can someone help me with this project??

I search on the internet about how does temperature affect the solubility of gases then I found two different answers: An increase in temperature results in a decrease in gas solubility in water, while a decrease in temperature results in an increase of gas solubility in water. The other one was vice versa of this statement. Which is correct between different ideas that I searched? I think the first is correct but I don't know how to explain it. Based on what I understand, since the temperature increases, the kinetic energy increases which result to fast moving molecules that causes the breaking of intermolecular bonds that leads the molecules to escape from the solution. Hence, the solubility of the gas will decrease. I'm not sure though if this is the reason. Can someone explain to me more clearly??

oh ok. thanks!

tc 99's half life is 212,000 years, while tc99m is 6hours. If the half life is shorter that means that tc will live longer. Since tc99m's half life is 6hours that means that it will live shorter. This is opposite of the meaning of a metastable isotope. Why is it like that?

what do you mean?? can you give me an example? how about Technitium-99m? it is a metastable isotope, but its half life is 6hrs, which is less than its half life in its stable state.

Can someone explain to me, what does Metastable isotope means? I already read the definitions on the internet but I really don't understand it. Thanks in advance.

is it really like that? it's all look the same to me? maybe i'm new to this thats why i didn't know.

but we are only allowed to use cardboards and papers and also if we buy the glider my teacher will gonna cut my mark off , and i forgot to tell you that we need to do our own designs , can you give me an idea on how to design it? thanks by the way .

Hi, I have a physics project which I need to make my own glider but i don't know how to make. I search on the internet and I found a useful tutorial but the problem is, I cannot find a printable parts of a glider. Can someone give me a website where I can find parts of a glider so that I could just print it and bulid it? And also I need to draw a schematic diagram for it but I AM not good at drawing, can someone help me please??

thanks!

1.) Summarize your findings. Are stoichiometric calculations an effective way to predict limiting reagent and excess reagent? Explain. According to the findings of this experiment, the reaction between the 2 g of cupric chloride and the 0.5 g of aluminum would yield aluminum chloride and copper precipitate. The experiment shows that the aluminum is the excess reagent because of the unreacted pieces of aluminum still floating on the solution while the cupric chloride is the limiting reagent. The theoretical findings proved that the aluminum is the excess reagent and the limiting reagent is the cupric chloride because of the calculated number of moles of the product. Hence, a stoichiometric calculation is an effective way to predict limiting reagent and excess reagent without conducting actual experiments. 2.) Suggest reasons why the percentage yield of the reaction was not 100%?If a yield is 100%, it means that no product has been lost. But if the yield is 0% it means that no product has been made. The reasons why the percentage yield of a product might be less than 100%, includes when: There were some impurities in the materials used.The chemical reaction did not go to a completion.Some of the reactants were used and some was left or did not react during the chemical reaction. The reactants may not always exist in the proportions written in the balanced equation. Hi guys! I'm back. I used your suggestions in answering the second question. Do you mind checkin my answers? thanks.

That makes sense, maybe I could just add some information about the result of the experiment. Thanks guys!

Thanks for your respond , but I don't think it is not the answer to my question. It's like how is stoichiometric calculation an effective way of predicting the limiting and excess reagent ??

Are stoichiometric calculations an effective way to predict limiting reagent and excess reagent? This is one of the questions asked from the lab report that I am doing. My problem is how to explain this, I know that it is an effective way because I got the limiting reagent in the experiment same as my calculations. But I think that's not a proper way on how to explain this. CAn someone help me please?