M 1 1.1.2 Quiz: Kinetic Theory
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Question 5 of 10
How does the kinetic energy of solids, liquids, and gases compare?
O A. Gases have the lowest kinetic energy, followed by liquids, and
then solids.
B. Gases have no kinetic energy, solids have a little, and liquids have
the most.
C. Gases have the same kinetic energy as liquids, which is more than
solids.
D. Gases have the highest kinetic energy, followed by liquids, and
then solids.
SUBMIT

D. Gases have the highest kinetic energy, followed by liquids, and then solids.

Explanation:

When comparing the particles of the three states of matter, that of gases are loosely packed i.e far apart from each other while those of solids are tightly packed and fixed. Particles of liquids are also closely packed together but not as rigid as in solids.

Since the particles of gases are very far apart from one another, this allows quick and random movement, hence, making them have the HIGHEST kinetic energy (energy due to motion) followed by liquids and then solids.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.