Astone is dropped from the top of a cliff. the splash it makes when striking the water below is heard 3.0s later. how high is the cliff?

m

Explanation:

Consider the motion of the stone in vertical direction:

= initial velocity = 0 m/s

= acceleration due to gravity = 9.8 m/s²

= time taken  to hit the water below

= vertical height of the cliff

Using the kinematics equation

                          eq-1

consider the motion of sound from water in upward direction

= Speed of sound = 343 m/s

= time of travel for sound

Using the equation

                                eq-2

we have been given that

Using eq-1 and eq-2

m

  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

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption