1. A laser of unknown wavelength is aimed at a double slit in an opaque screen, with slits 0.8 mm apart. The resulting wave pattern is projected onto a screen 2.0 m beyond it. You make the following measurements relative to the central maximum: Bright Fringes: 1.1 mm, 2.2 mm, 3.4 mm, 4.5 mm Dark Fringes: 0.6 mm, 1.7 mm, 2.8 mm, 3.9 mm Given this information, find the following: a) The wavelength of your laser. b) The position of the 5th order bright fringe to the nearest one-tenth of a millimeter. c) The position of the fifth order dark fringe to the nearest one-tenth of a millimeter. Note that your position measurements are accurate to only the nearest 0.1 mm. This means your wavelength calculation from each position measurement will vary slightly from the others. How should you handle this

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

490 n

f=125n a=2.5m/s2