Globally, more than 80% of all primary energy for today's economies comes from a. nuclear power b. hydropower installations c. biofuels d. fossil fuels

The correct answer is fossil fuels.

Fossil contributes 80% to the all primary energy for today's economies because, the fossil fuels are readily available and relatively cheaper, they does not require any plant set up, can be used immediately and effectively, also they are very cheap compare to other energy resources. However they are the most polluting fuels and also are non-renewable energy resources.

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

both the fifth and fourteenth amendments of the united states contain a due process clause. while the fifth amendment describes a legal obligation of the federal government to not deprived of life, liberty or property without due process of law, the fourteenth amendment applies the same obligation to the states to guarantee that all of the states provide fair procedures as well.