A clever 74 kg physics student says they can use an 832 kg car to determine how fast they can run. All they have to do is run at full speed and jump onto the hood of the car and see what the
speedometer says as the car rolls back. The student tries this out and finds the car's
speedometer reads a measly 0.176 m/s. How fast did the student run? If the car was coasting
at a known velocity, instead of sitting stationary, would the student still be able to use this
method to determine how fast they can run? Identify which concepts, rules, laws, equations,
and features of this system are important and appropriate to solve this problem. Use qualitative,
quantitative, and graphical analysis methods to solve this problem. (Note: the car has to be in
neutral for this to work.)

  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

hi i’m sorry to call us today so we will get back with y’all and we will have to do it haha omg was the day