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svlad2 [7]
3 years ago
7

Which of these best describes heat transfer through conduction? A) Heat transfer as electrons are excited in atoms. B) Heat tran

sfer by the emission of pure energy waves. C) Heat transfer by a liquid or gas flowing over an object. Eliminate D) Heat transfer by molecules colliding with adjacent molecules.
Physics
2 answers:
zalisa [80]3 years ago
8 0

Answer: D) Heat transfer by molecules colliding with adjacent molecules.

Explanation:

The heat transfer is achieved by three modes:

a. Conduction: This type of heat transfer happens when there is direct contact between two objects. In conduction, heat is transferred by molecules bumping into each other.

b. Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas).

The hot liquid rises up due to its low density and the cold liquid sinks thus generating convection currents.

c. Radiation: This type of heat transfer happens when there is direct transfer of electromagnetic energy through space.

Setler79 [48]3 years ago
7 0
I'd go for D here. It also fits in with the idea of thermal expansion - as something is heated up, molecules vibrate and maybe collide. they vibrate with bigger amplitudes, so taking up more space, so expanding. maybe
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Explanation:

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           U = qV

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                   = 112 \times 10^{-22} J

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2 years ago
The population of ticks in the forest and the temperature of the air have an indirect relationship. As the air temperature incre
Ksju [112]

Answer:

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8 0
3 years ago
Two technicians are discussing a fuel gauge on a General Motors vehicle. Technician A says that if the ground wire's connection
r-ruslan [8.4K]

Answer:

b. Technician B only

Explanation:

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8 0
3 years ago
How fast or slow an object is moving and in what direction
Svet_ta [14]
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3 years ago
A Foucault pendulum consists of a brass sphere with a diameter of 32.0 cm suspended from a steel cable 10.0 m long (both measure
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Answer:

T = 44.35 °C

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d = 32cm

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As the temperature increases, both will expand.

So,

0.3 x 10^(-2) = δL(steel) + δR(brass)

= {L(o) x α(steel) x δT} + {R(o) x {α(brass) x δT}

= {10 x 1.2 x 10^(-5) x (T-20)} + {0.16 x 2 x 10^(-5) x (T-20)}

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T = 20 + 24. 35 = 44.35 °C

8 0
2 years ago
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