infinite mass.....?

Question

if i have a 9 cm long plank of even thickness, and i cut it up into 3 pieces fo 3 cm each, what wud be the weight of each piece???Theoretically it shud 3.333333333333.........but, mass can never be infite tright???

soory 'bout the spelling

mass of plank==11gm

Answer 1

Yes, you are confusing infinite decimals with infinite mass. A bunch of issues going on here people.
1.The mass of each piece 3.333...grams is not infinite. It is, in fact, finite because it is less than 3.4 the last time I checked.
2.The number 3.333... is an EXACT number. You must not forget the notion of exactness. It is only a theoretical object. You will NEVER be able to tell if something is EXACTLY 3.333... grams or not. First of all, how would you make something EXACTLY 3.333... and second, let's just say that you have something that is EXACTLY 3.333..., how would you find out if it weighs EXACTLY 3.333... grams.

Here is an example. Try this. Its a challenge for you. Cut me a piece of paper that is exactly 4 inches long. Trust me, you will never be able to do it. You will ALWAYS cut it either too long or too short. In addition, even if you do give me a piece of paper that is exactly 4 inches long, I will not have any way of checking its length. Because you cannot trust any measuring instrument. My ruler will always be off. In fact, try this! Measure a piece of paper using the same ruler a bunch of times. You will see that you get different answers (maybe even everytime). There is always margin of error and that is why error analysis is a HUGE field. We know in any measurement we make, we will always have error. The question is how much is the error and how to minimize it.

These notions are just some abstract notions that only exist in our minds. The are not possible in reality but they are very helpful to us. In geometry, a straight line is not supposed to have any width, only one dimension, length is supposed to be there. Which means that in real life it is not possible for us to draw a line because any line we draw will ALWAYS have a width. A circle, is supposed to be either a polygon with infinite sides and shape such that any point on the circle is equidistant from the center. Anyway you look at it, they are both impossible to draw or make. You can never make anything perfectly circular/spherical.

Answer 2

properly i think in case you will ask some thing you will be able to as properly ask for the impossible! the different answerers are incredibly lots actual. we've not got a thought yet to let us know what happens close to the middle of a black hollow. without guidance popping out of black holes to help us, this is all incredibly lots hypothesis on the 2d. There are some factors to recollect. Black holes result from the cave in of a megastar. The mass of the black hollow is in spite of mass the megastar had that initially collapsed. because of the fact the mass collapses it reaches a length the place not greater guidance can escape. The outer floor at this degree is termed the form horizon. If our solar have been so unlucky as to break down right into a black hollow, the form horizon might seem to us to have a diameter of a pair of mile. interior the form horizon is the place issues get rather loopy. the greater serious place is close to the middle. that's envisioned that each little thing that falls into the form horizon ultimately gets to the middle. so which you finally finally end up with the completed mass of a megastar interior the minutest quantity. even nonetheless, for that to be so, all count and power in that minute quantity might must be crushed to a density far previous something that has ever been encountered by ability of any truthful physicist. subsequently we don't understand the thank you to describe it mathematically. that's smart to think that the vital component of the black hollow reflects physics that enable count to do strange issues. this might mean that area and time additionally are doing strange issues there. we easily desire a thought of quantum relativity to let us know merely how strange it gets there. Cheers!

Answer 3

Putting aside for a moment that 11/3 = 3.66666...
Putting aside for a moment that cutting a plank always involves some wastage (sawdust, ash, whatever, depending on how you cut it)...


The mass is not infinite. The number you are pointing out:
. . . . 3.333333333333.........
is not infinite. It is less than 3.4 and more than 3.3.

Even though you cannot exactly represent this number in a finite number of decimal fraction digits, the number itself is a definite finite thing (10/3 to be exact).

Answer 4

i think the answer is (11)/3 which is 3.6666666..... or 3+2/3and if im incorrect 3.333333........ stand for 3+1/3 try using 3+(1/3) in a calculator

by the way 3 1/3 is 10/3 meaning you must give us a mass of 10 grams

Answer 5

i suck at this kinda stuff hold on let me think im only 13 , ok i think i got it , so it would be 3.33333333333333 but it would be easyer if u knew the total mass of the 9cm plank cause if its even thikness then if u divide it by three it would get an equal weight , but i dont know im only 13

Answer 6

You are confusing infinite mass with repeating decimals.

The mass of each piece, 3.666... grams, is a rational number. Even if it were irrational, it still wouldn't be infinite.

Answer 7

you have to round it to the correct amount of significant figures which would be 1....so the answer is 3.

Answer 8

Oh just cut the damn plank and finish the deck will you?!?

Answer 9

oh, sweetie... y do u trouble urself with trivial details... not everything has to be done the complicated way.

i miss chatting to u, by the way!