Homework Help: physics

Posted by bob on Sunday, May 17, 2009 at 7:12pm.

The Weistin Stamford Hotel in Detroit is 228 m tall. Suppose a piece of ice which initially has a temperature of o degrees celcius falls from the hotel roof and crashes to the ground. Assuming that 50% of the ices mechanical energy during the fall and collision is absorbed by the ice and that 3.33 x 10^5 Joules is required to melt 1 kg of ice calculate the fraction of ice's mass that would melt.

physics - drwls, Sunday, May 17, 2009 at 7:28pm
Compute the potential energy release of the fall (Hint: PE = Mgh). The mass M will remain as an unknown variable. Multiply that by 0.5 for the heat release. Divide the result by the heat of fusion (33.5*10^5 J/kg x M)

The mass M will cancel out, and you will have the fraction that melts.

Answer this Question

Related Questions

Chemistry - A 62g piece of ice at 0 degrees celcius is added to a sample of ...
General Chemistry II - A quantity of ice at 0 degrees celcius is added to 64.3 ...
Chemistry - How do you solve this equation? A piece of aluminum with a mass of 3...
physics - 0.2 kg of ice at 0 degrees celcius is mixed with 500g of water at 25 ...
Chemistry - How many joules of heat are needed to heat 25.0 g of ice at -5.0 ...
Physics - Ice (initially at 0 degrees celcius)is added to 0.75 L of tea at 20 ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Math - An object is heated to 90 degrees Celcius and is then allowed to cool in ...
Help me!, Physics - A 60g piece of ice at an intial temperature that is unknown...

For Further Reading

First Name:
School Subject:
Answer: