An early major objection to the idea that earth is spinning on its axis was that earth would turn so fast at the equator that people would be thrown into space. given : rearth = 6.37 × 106 m , mearth = 5.98 × 1024 kg , rmoon = 1.74 × 106 m , and g = 9.8 m/s 2 . show the error in this logic by calculating the speed of a 117 kg person at the equator. answer in units of m/s.

Explanation:

In order to a person to be thrown into space, the centripetal force has to be greater than his weight. Thus, we have to calculate the magnitudes of this forces:

The centripetal acceleration is given by:

The speed is given by the distance traveled () divided into the time spent in one revolution (the period), that is, one day.

Now, we can calculate the centripetal force:

Finally, we calculate the weight of the person:

Since the weight is much greater than the centripetal force, we can say that people wouldn't be thrown into space.

  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

i think the answer is a, hope this is right, that would be my best guess.