Akosua has observed that anytime she drinks sobolo, her stool appears dark green. On one occasion Akosua observed that her stool, which appeared dark green, turned quickly to bright red upon mixing with the perchloric acid-treated WC water.

i. What about the sobolo drink (bright red) that made the stool of Akosua green?

ii. Why did the stool of Akosua, which appeared green because she took sobolo drink, turn into

bright red upon mixing with the acidic WC water?

iii. Suggest a practical use of sobolo drink in the identification of chemicals in the science laboratory .

perchloric acid treated WC water

h let me think

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