An object is placed 10 m before a convex lens with focal length 4.8 m. Another concave
lens is placed 16.2 m behind the first lens with
a focal length –15 m (see the figure below).
Note: Make a ray diagram sketch in order
to check your numerical answer.
At what distance is the first image from the first lens
Answer in united of m
B. What is the magnification of the first image?
C. At what distance is the second image from the second lens?
Answer in units if m.
D. What is the magnification of the final image, when compared to the initial object ?

the reason is because the moon has some form of gravity, and that gravity pulls the ocean tides.

  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

real, smaller and upside-down.   so the answer should be b.