At its tallest point a rollercoaster lifts participants to a height of 115 m. The combined mass of a fully loaded coaster train with participants that each weigh 100kg is a total of 4,500 kg. Calculate the gravitational potential energy of the coaster train and its riders relative to the ground using the formula U9= mgh. Assume the acceleration due to gravity on Earth g= 10 m/s/s. 115,000 J
51,750,000 J
1,150,000 J
5,175,000 J

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

  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

d) physical means can be used to separate the components of air.

3. dark matter

empty space could also be a simple vacuum