The acceleration of a cart rolling down a ramp depends on the acceleration of a cart rolling down a ramp depends on both the angle of the ramp and the length of the ramp the length of the ramp the angle of the ramp neither the angle of the ramp or the length of the ramp

angle of ramp

Explanation:

The acceleration of a cart rolling down a ramp depends on the angle of the ramp and not on the length of the ramp.

Let the car have wheel in form of thin cylinder, therefore its acceleration is given by

where

a=acceleration

g=acceleration due to gravity

I=moment of inertia of the wheel

m=mass of wheel

r=radius of wheel

=angle made by ramp with the horizontal

In above term there is no sign of length of ramp thus it is independent of it.

  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

battery with hi vtge high val resist in series