Can High Velocity Cause Hailstones to Melt?

AI Thread Summary
Hailstones are likely to melt upon impact if they reach a high velocity of 824 m/s, but the practicality of such speeds is questioned. The discussion highlights that not all kinetic energy (KE) would convert to heat in the hailstones; some would transfer to the ground upon impact. Concerns are raised about whether hailstones actually hit the Earth at such high speeds, suggesting that if melting requires such velocity, it may be unlikely in real scenarios. The conversation also touches on the potential for inelastic deformation of both the hailstones and the surfaces they strike. Overall, the feasibility of hailstones melting upon impact remains debated.
dobbygenius
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Homework Statement
by reference to your answer in part (a), suggest whether hailstones are likely to melt on hitting the Earth's surface
Relevant Equations
mL=1/2mv^2
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I'm pretty sure the hailstones are likely to melt/disperse because 824 m/s is a high velocity but can someone help me elaborate why it would melt?
 
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dobbygenius said:
Homework Statement:: by reference to your answer in part (a), suggest whether hailstones are likely to melt on hitting the Earth's surface
Relevant Equations:: mL=1/2mv^2I'm pretty sure the hailstones are likely to melt/disperse because 824 m/s is a high velocity but can someone help me elaborate why it would melt?
Do you mean to say the hailstones would melt? Or wouldn't melt?
 
PS I'm not sure why all the KE would transform to heat in the hailstone. Why wouldn't about half the energy go to heat in the ground at the point of impact?
 
PeroK said:
Do you mean to say the hailstones would melt? Or wouldn't melt?
yes, the hailstones would melt...but I don't know how to elaborate on that
 
PeroK said:
PS I'm not sure why all the KE would transform to heat in the hailstone. Why wouldn't about half the energy go to heat in the ground at the point of impact?
You're right I just followed what the question said 🤔
 
dobbygenius said:
yes, the hailstones would melt...but I don't know how to elaborate on that
With what speed do hailstones hit the Earth?
 
PeroK said:
With what speed do hailstones hit the Earth?
the first question asked to find the minimum speed for it to melt when it hits the surface and I found it to be 824 m/s but other than that both the first and second question didn't give any more data
 
dobbygenius said:
the first question asked to find the minimum speed for it to melt when it hits the surface and I found it to be 824 m/s but other than that both the first and second question didn't give any more data
Do you think hailstones hit the ground at ##824 \ m/s## or more? Have you ever seen hailstones?
 
dobbygenius said:
I'm pretty sure the hailstones are likely to melt/disperse because 824 m/s is a high velocity but can someone help me elaborate why it would melt?
Your reasoning is backwards. If it requires a very high velocity to melt the hailstones then that makes it relatively unlikely that hailstones would melt in practice.
So the question is, is such a high impact speed likely?
PeroK said:
PS I'm not sure why all the KE would transform to heat in the hailstone. Why wouldn't about half the energy go to heat in the ground at the point of impact?
Because most of the inelastic deformation would be in the ice.
 
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haruspex said:
Because most of the inelastic deformation would be in the ice.
That's a subtle assumption. It depends what the hailstones hit. Large hailstones may damage a car roof, for example, causing inelastic deformation of the metal.
 
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PeroK said:
Do you think hailstones hit the ground at ##824 \ m/s## or more? Have you ever seen hailstones?
No, I just looked it up, should've done it earlier
 
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  • #12
haruspex said:
Your reasoning is backwards. If it requires a very high velocity to melt the hailstones then that makes it relatively unlikely that hailstones would melt in practice.
So the question is, is such a high impact speed likely?

Because most of the inelastic deformation would be in the ice.
Right...thankyou!
 
  • #13
That would be a very noisy hailstorm! Lots and lots of little sonic booms :wink:
 
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