I need the answers to the Gases Unit Test for Chemistry. I need help fast and this link is to the test and i just need the multiple choice answers. This is for 10th grade btw. Thank You Here's the link if it it helps: https://www. connexus. com/assessments/learnosity. aspx?idAssessment=1831640&idWeb user=3716373&idSection=1579950& amp;idHtmllet=12228833&close=tr ue&popup=true

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: