During an experiment, Ashland noticed that the mass of the water in his beaker changed after the water was heated. Which of the following best describes what happened to the water in Ashland's experiment?
The total mass of the water in his beaker changed because the chemical composition of the water changed when he heated it.
The total mass of the water in his beaker changed because part of the water vaporized and is now in the air around the beaker.
The total mass of the water in his beaker changed because the water was destroyed when it was heated.
The total mass of the water in his beaker changed due to improper measurement techniques.

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

you didnt put any of the following