Question

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thermal energy transfer practice

1. ccc energy and matter which system has the most thermal energy? write to explain your answer.

a. 100 g water at 110°f
b. 200 g water at 110°f
c. 100 g water at 32°c
d. 100 g water at 0 k

1. ccc energy and matter complete the table describing types of energy transfer.

type of energy transfer | description
radiation |
| particles of a fluid increase in kinetic energy and move upward, transferring thermal energy and displacing cooler, denser particles which sink downward.
conduction |

Explanation:

Step1: Convert temps to same scale

First, convert $32^\circ\text{C}$ to °F: $^\circ\text{F} = (^\circ\text{C} \times \frac{9}{5}) + 32 = (32 \times \frac{9}{5}) + 32 = 89.6^\circ\text{F}$. 0 K is absolute zero, so thermal energy is 0.

Step2: Compare thermal energy

Thermal energy depends on mass and temperature. For same temp, more mass = more energy. 200 g at 110°F has more mass than 100 g at same temp, and 110°F > 89.6°F > 0 K.

Step3: Define radiation

Radiation uses EM waves, no medium required.

Step4: Identify convection

The given description matches fluid movement in convection.

Step5: Define conduction

Conduction is direct particle contact energy transfer.

Answer:

1. b. 200 g water at 110°F

2.

Type of Energy Transfer	Description
convection	Particles of a fluid increase in kinetic energy and move upward, transferring thermal energy and displacing cooler, denser particles which sink downward.
conduction	Transfer of thermal energy through direct contact of particles.