Question 4 (1 point)
A student wants to show the transfer of heat energy without matter. Which investigation design would best help the student?
a
an investigation of conduction through collisions between particles in space
b
an investigation of radiation through a current in a fluid
c
an investigation of conduction through the movement of particles through a solid
d
an investigation of radiation through electromagnetic waves
d. an investigation of radiation through electromagnetic waves
are you correct
Yes, I am correct. An investigation of radiation through electromagnetic waves would best help the student show the transfer of heat energy without matter. Radiation is the transfer of energy through electromagnetic waves, which can occur in a vacuum or in the absence of matter.
Question 5 (1 point)
The diagram below shows two substances, A and B, which are at different temperatures.
A - Temperature of substance A is at 50*C
B - Temperature of substance B is at 25*C
What will happen when substance A is dropped into substance B?
a
Substance A and B will exchange heat, and they both will reach 25°C.
b
Substance A and B will exchange heat, and they both will reach 50°C.
c
Substance A and B will eventually reach the same temperature.
d
Substance A will get even warmer as heat flows into it from substance B.
c. Substance A and B will eventually reach the same temperature.
are you sure
To determine the investigation design that would best help the student show the transfer of heat energy without matter, let's first understand the different modes of heat transfer:
1. Conduction: It involves the transfer of heat energy within a solid material or between solids in direct contact. This transfer occurs due to particle collisions.
2. Convection: It involves the transfer of heat energy through the movement of particles in a fluid (like air or water).
3. Radiation: It involves the transfer of heat energy through electromagnetic waves, which do not require a material medium for propagation.
In this case, since the student wants to demonstrate the transfer of heat energy without matter, we should focus on the mode of heat transfer that does not require a material medium. Therefore, the best choice would be:
(d) an investigation of radiation through electromagnetic waves.
This design would allow the student to show the transfer of heat energy without the need for particles or matter as a medium. Radiation heat transfer can occur through a vacuum or in space, making it ideal for this investigation.