Which types of heat transfer involve heat flow from hot objects to colder objects?

Physics

2 answers:

Makovka662 [10]3 years ago

5 0

Answer:

convection, conduction, and radiation

Explanation: Study Island

Lilit [14]3 years ago

3 0

Thermal radiation is a form of heat transfer because the electromagnetic radiation emitted from the source carries energy away from the source to surrounding objects

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1)the car's engine power is 44000W. Explain this number in a physical sense

Ratling [72]

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1) It expresses the rate (top speed) at which it can move with time.

2) P = 20 W

3) h = 18 km

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1) Power is the rate of transfer of energy.

⇒ Power = $\frac{Energy(or workdone)}{Time}$

i.e P = $\frac{E}{t}$

Thus a car's engine power is 44000W implies that the engine of the car can propel the car at this rate. This expresses the rate (top speed) at which it can move with time.

2) m = 400g = 0.4 kg

t = 20 s

h = 100m

g = 10 m/ $s^{2}$