Agirl weighing 200 newtons hangs from three pulley systems.

girl supported with three ropes with a spring scale reading the force on each rope is labeled a, girl hold with one hand on a support and one hand holding one rope with a spring scale reading the force is labeled b, girl hanging on a rope attached to a support with two pulleys above the place of attachment with a spring scale reading the force is labeled c.

the blank for which pulley system would read 100 newtons?

pulley a
pulley b
pulley c
all three pulley systems

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

  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

true tan speed = ang vel x radius