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2 years ago

Why might people be able to walk barefoot on hot coals of wood without burning their feet?

Physics

2 answers:

ki77a [65]2 years ago

8 1

Hot coals of wood? Wood is not coals. So they can't burn their feet, there are no hot coals, just wood.

katovenus [111]2 years ago

8 0

The correct answer of this question is : Low thermal conductivity of hot coals.

EXPLANATION :

Before going to answer of this question, first we have to understand the nature of hot coals of wood in terms of conductivity.

The thermal conductivity of the wood is very small i.e it is thermally insulator.

Due to the less thermal conductivity of wood, the heat partially flows to the foot. The person will feel the heat, but not as much as the heat given by thermal conductors.

Hence, a barefoot person person can walk on hot coals of wood.

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The alarm at a fire station rings and a 87.5-kg fireman, starting from rest, slides down a pole to the floor below (a distance o

blsea [12.9K]

Answer:

$F_f=840N$

Explanation:

From the question we are told that

Weight of fireman $W_f= 87.5kg$

Pole distance $D=4.10m$

Final speed is $V_f 1.75m/s$

Generally the equation for velocity is mathematically represented as

$v^2 = v_0^2 + 2 a d$

Therefore Acceleration a

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$a'= 0.21m/s^2$

Generally the equation for Frictional force $F_f$ is mathematically given as

$F_f=m*a$

$F_f=m*(g-0.21)$

$F_f=87.5*(9.81-0.21)$

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2 years ago

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Answer:

C.) 1

Explanation:

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Luda [366]

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3 years ago

Read 2 more answers

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strojnjashka [21]

Answer:

A vacuum

Explanation:

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