Which of the following statements is true about natural gas? it can be used directly in homes. it does not pollute the atmosphere. it is produced with the of waterfalls. it can be transported safely with no risk of leaks.

It can be used directly in homes

Explanation:

The natural gas is one of the fossil fuels that is used on a large scale. It can be used directly in homes, as there are lot of things that have been made to run on natural gas, be it for cooking or heating. Even though this fossil fuel doesn't contribute as much to the pollution of the atmosphere as the oil and the coal, still manages to have part in it. The majority of the pollution of the natural gas comes while it is transported. Through the transportation very often there's leaking of the natural gas. As it leaks, the natural gas releases lot of methane into the atmosphere, and the methane is a more effective greenhouse gas even than the CO2, though only on the short term.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

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explanation:

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