Imagine you have a pot of water boiling on the stove. what is the water, and what is the steam that rises from the pot?
a. soiled, gas
b. liquid, gas
c. gas, liquid

the answer is B

Explanation:

bc the water is a liquid and the steam is the gas

b. liquid, gas

Explanation:

Water which is present in pot is liquid and steam that rises from the pot is gas.

Water between zero degree Celsius and 100 degree Celsius exists in liquid state. This is because in this range of temperature, water molecules are held together by weak hydrogen bonds. These hydrogen bonds keep water molecules together but these hydrogen bonds are not strong enough to condense them, so water molecules are constantly moving and exists in liquid state.

When heat is added to the system, energy of the water molecules are increased and they begin to move quickly. In this state, water molecules do not remain attracted to each other and eventually converted to gaseous state which is called steam.

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