A conducting bar rotates with a constant angular speed in a counterclockwise direction about a pivot at one end as shown. Assume a uniform magnetic field is directed out of the page. Which is the correct statement for describing the potential difference induced along the length of the bar? Rod pivoted at one end A. The potential is maximum at the middle of the bar and lowest at the pivot. B. The potential is higher at the end far away from the pivot and the potential is lower at the pivot. C. The potential difference is zero along the length of the bar. D. The potential is higher at the pivot and lower at the end far away from the pivot.

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers