By calculating the crests, you can find the waves' frequency.
Hope this helps!
You need to find the mass of water in the pool.
Find the volume (10 x 4 x 3) = 120 m3
Water has a density of 1000g/m3,so 120 m3 = 120 x 1000 = 120 000 kg
[delta]H = 4.187 x 120 000 x 3.4 (and the units will be kJ)
You then use the heat of combustion knowing that each mole of methane
releases 891 kJ of heat so if you divide 891 into the previous answer,
you will get the number of moles of CH4
Well it determines on how much magnetism a material has.
While he is lifting the dumbell as the definition of work done = moving a mass through a distance = F x d
Sliding and Static.
Would be the right one here.
