Melting Electrical Solubility Point Conductivity
°C Solid liquid Water
Solution
I
776 Now
High High
II
-198 Low Low Low
III
961 High High Low
IV
1640 Low Low Low
14. Which substance is an ionic solid?
A) I
B) II
C) III
D) IV
E) None of the above

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

c. is the answer

by love gaming

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.