Photographic memory and perfect gpa, but i have low intelligence.?

[sportsstar469]

It's an analogy, I'm just saying that if all you do is memorize things without logically thinking about it that you really have not learned anything.

Obviously in the case of multiplication you have learned something where as my cousin has not since he just memorized a table.

Make sense?

I'm not saying memorization is bad, it's only bad when all that you've done is memorize information rather than thinking about it.

yeah well i guess its a 70/30 split for me lol in the favor of memorization.

Originally Posted by Feldoh Response from sportsstar469

That is knowing a basic multiplication fact. You still understand the fact and there is no conflict in both of these being true.

Your question about unit conversions for Chemistry is essentially just slightly elaborate use of multiplication involving ratios. Each ratio typically has two units; one for each number. You can choose to use a ratio in one form or in its reciprocal form. You just must be certain to keep the units where they belong.

i just get pretty confused on english to metric conversions. like i know how to start the problem but i don't know the first step. once i have the first conversion I am usually OK.

what io mean is i know i have to draw the lines and at the beginning put my starting units and at the end put my ending units but i can't make the first conversion step.

 

[symbolipoint]

i just get pretty confused on english to metric conversions. like i know how to start the problem but i don't know the first step. once i have the first conversion I am usually OK.

There are a couple of typical, classic exercises which you should try, since almost everybody knows the relevant ratios without needing to look for them in any reference book:

How many inches are in 1.000 mile?

How many seconds are in 1.00 year?

Each of those rely on more than just one ratio each. You would need a trail of conversion ratios to reach the results. Try working through those sample exercises and you will learn to think clearly about proportions and unit conversions.

 

[thrill3rnit3]

The key thing in those types of conversions is to cancel unneeded units out (and convert them to needed units), so set up your fractions/ratios to make sure that happens.

 

[sportsstar469]

There are a couple of typical, classic exercises which you should try, since almost everybody knows the relevant ratios without needing to look for them in any reference book:

How many inches are in 1.000 mile?

How many seconds are in 1.00 year?

Each of those rely on more than just one ratio each. You would need a trail of conversion ratios to reach the results. Try working through those sample exercises and you will learn to think clearly about proportions and unit conversions.

ok I am going to try those. just curious why you put those 0's after the decimals? those zeros are signifigant right? 1.000 is 4 sigs and 1.00 is 3?
im assuming those are 1 mile and 1 year .

the first one i got 1/6960 inches which makes no sense LOL
i did1 inch over 1
then in the next square i did 1 ft over 12 inches and canceled out inches
then in the next square i did 1 mile over 5280 feet
then i multiplied and got 1/6969...
lol i thought these types were easy iwas strugglign with the much much harder ones LMFAO now i have to go and elarn theese ones -_-.
not going to do the second one because I am not sure wheere i messed up here lols.

i thought iw as supposed to start with 1 inch over 1 and then put 12 inches on the bottom of the enxt square to cancel out, but apparently i mixed up the orders. i don't understand this.

 

[symbolipoint]

sportsstar469,
Other important guidance thrill3rnit3 gave you. You must arrange the ratios properly so that you can cancel units.
At least you recognize that your result was wrong, and you seemed to identify the correct ratios to use. Continue those exercises, since you may find the correct arrangments and correct results.

Look at what you start with; decide what kind of result you want.
For the one mile to how many inches, you know you are starting with ONE MILE, and you want a result of INCHES.

Forget about the significant figures for just now. Focus on the use of ratios to make the units conversions.

 

[sportsstar469]

sportsstar469,
Other important guidance thrill3rnit3 gave you. You must arrange the ratios properly so that you can cancel units.
At least you recognize that your result was wrong, and you seemed to identify the correct ratios to use. Continue those exercises, since you may find the correct arrangments and correct results.

Look at what you start with; decide what kind of result you want.
For the one mile to how many inches, you know you are starting with ONE MILE, and you want a result of INCHES.

Forget about the significant figures for just now. Focus on the use of ratios to make the units conversions.

LMAO i think i got confused because you said inches first. in reality i should be STARTING with miles. miles is my known and I am LOOKING for inches. wow i really do not have any common sense its pretty scary. but i do understand now. 63360 inches.

yeah i did realize my answer made no snse. because obviously there had to be 5280 times 12 inches in one mile. (there's 5280 feet in one mile and 12 inches in a foot) i knew that before doing the problem but i wanted to make sure icould do it properly..which i guess i couldn't!
a lot of the problems on the quiz will be ahrder though. like density problems, and like problems where you are going from like meter/second to miles per hour

 

[symbolipoint]

a lot of the problems on the quiz will be ahrder though. like density problems, and like problems where you are going from like meter/second to miles per hour

You will be using the SAME mathematical concept.

 

[sportsstar469]

You will be using the SAME mathematical concept.

im sure that is true but it is still way more difficult for me. my chem teacher said the same thing as you though. he said dave its the same thing you just WANT to do something different and make up rules. but its the same thing. btw i lost my chem folder so i don't have my polyatomic ions sheet...great...
sulfate i so4 with a neg 2 charge right?