Suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of +2.40 pC.(a) What percentage of the electrons originally in the cube was removed?(b) By what percentage has the mass of the cube decreased because of this removal?I already figured out the answer to the first part (1.91x10^-15 %), but I can't figure out the second partCan someone help me?
u can use i on any kind of fabric
My husband does lots of cross stitch and other embroideries and he prefers linen for silk threadsLinen is smooth and offers little to no resistance or pull on the passing threadsI've done thread painting with silk threads for fancy evening bodices and I've used silk dupioni and shantungBoth make a luxurious ground for silk embroideryFor a sheer ground I've experimented with smooth silk organza, but you have make sure the front looks as good as the back: no floats or knotsAs a bonus: with proper care both linen and silk grounds will mean that your embroideries will last and be beautiful for decadesWith extremely careful finishing and handling some silk on silk embroideries can last for centuriesOne little hint: be sure that the thread is running the same way in the needle through the whole embroidery for a smooth and consistent luster to all your stitches.
I have used, silk embroidery floss on a Lavender and Lace Angel for counted crosstitch( for the wings ), on Aida cloth, I found that to get the stitches not to go all over the place and puff up, you must keep your hand tension, at the same level and quite tense, another thing if you are using a hoop or q-frame plastic for quilting, be careful that the stitches that you do with the silk floss do not get twisted or flattened by being in contact with the hoops.
volume 1 cm^3 density 2.7 g/cm^3 so mass m 2.7 g atomic mass 27 g/mol so 0.1 mol number of atoms 0.16.0210^23 6.0210^22 number of electrons per atom 13 number of electrons N 136.0210^22 number of electrons removed N' 3.5010^-12/1.610^-19 2.1910^7 a) the percentage N'/N 2.80^10^-17 b) mass of removed electron N' 9.110^-31 kg 1.9910^-23 kg total mass 2.7 g the percentage 1.9910^-23 kg/2.7 g 7.3810^-21
