Achild blows a leaf straight up in the air from rest. the leaf accelerates at 1.0\,\dfrac{\text m}{\text s^2}1.0 s 2 m1, point, 0, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction upward. how much time does it take the leaf to displace 1.0\,\text m1.0m1, point, 0, space, m upwards?

Time taken by the leaf to displace by 1.0 m distance is

seconds

Explanation:

As we know that initial velocity of the leaf is given as

now the acceleration upwards for the leaf is

The displacement of leaf in upward direction is

d = 1 m

so now we have

seconds

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  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