HEEELLP PLEASE PLEASE PLEASE WILL AWARD BRAINLIESTTT The graph shows the changes in the phase of ice when it is heated.

Which of the following temperatures describes the value of C? (5 points)

a
100 °C, because it is the melting point of ice.

b
100 °C, because it is the boiling point of water.

c
Less than 100 °C, because C represents the temperature at which ice melts.

d
Less than 100 °C, because C represents the temperature at which water evaporates.

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