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Viefleur [7K]
3 years ago
9

If you hold your hand over a pot of boiling water, it feels hot. Explain how the boiling water is transferring heat to your hand

.
Physics
2 answers:
disa [49]3 years ago
5 0

by conduction, which is direct touch

Natali5045456 [20]3 years ago
3 0

Explanation:

When we heat a fluid (liquid or gas) then hot material (less dense) will rise to the top and cool material (more dense) will sink at the bottom. Hence, this process of inter mixing of fluids is known as convection.

So, when we hold our hand over a pot of boiling water then due to the convection process taking place we feel heat on our hand. Whereas when there occurs direct touch between two objects of different temperature then this heat transfer is known as conduction.

Thus, we can conclude that the boiling water is transferring heat to your hand through convection.

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A 100-kg tackler moving at a speed of 2.6 m/s meets head-on (and holds on to) an 92-kg halfback moving at a speed of 5.0 m/s. Pa
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Given that,

Mass of trackler, m₁ = 100 kg

Speed of trackler, u₁ = 2.6 m/s

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To find,

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The momentum of the system remains conserved in this case. Let v is the mutual speed after the collision. Using conservation of momentum as :

m_1u_1+m_2u_2=(m_1+m_2)V\\\\V=\dfrac{m_1u_1+m_2u_2}{(m_1+m_2)}\\\\V=\dfrac{100\times 2.6+92\times (-5)}{(100+92)}\\\\V=-1.04\ m/s

So, the mutual speed immediately after the collision is 1.04 m/s but in opposite direction.

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