http://www.itstoohard.com/puzzle/GjsLQlYb

 

Winner gets a copy of XCOM : Enemy unknown.

 

PM me with the answers, if you finish the quiz.

Meh, this one is gonna take a while, but nice giveaway!

I get the feel that you're just trying to make us do your homework so you wouldn't have to.

I get the feel that you're just trying to make us do your homework so you wouldn't have to.

Uh...he also had to input the right answers you know...

Question 3 is unsolvable as we do not know the shape of the block of ice, nor do we know the thickness of the wire.

NIce, but I dont like the game :>

fuck algebra

Question 3 is unsolvable as we do not know the shape of the block of ice, nor do we know the thickness of the wire.

 

1. Shape of the ice doesn't matter.

2. The wire's thickness is negligible.

Question 3 is unsolvable as we do not know the shape of the block of ice, nor do we know the thickness of the wire.

 

1. Shape of the ice doesn't matter.

2. The wire's thickness is negligible.

 

Question 3 is still unsolvable as it's pretty hard to melt water. And even if you meant melt ice, does it have to melt all the ice or just enough such that the wire is not touching ice ("separate wire from the ice")?

Question 3 is unsolvable as we do not know the shape of the block of ice, nor do we know the thickness of the wire.

 

1. Shape of the ice doesn't matter.

2. The wire's thickness is negligible.

 

Question 3 is still unsolvable as it's pretty hard to melt water. And even if you meant melt ice, does it have to melt all the ice or just enough such that the wire is not touching ice ("separate wire from the ice")?

 

The question is a little misleading, I guess I'll just post the answer here.

Behold my magnificent drawing!

 

Note that the red line is the part of the block that'll have to be removed to free the wire.

Behold my magnificent drawing!

 

Note that the red line is the part of the block that'll have to be removed to free the wire.

 

First you need to calculate amount of heat required to turn 1kg of ice into 1kg of water, using latent heat:

Q1 = 334kJ/kg x 1 kg = 334 kJ

Then amount of energy to raise water's temperature from -10В°C to 0В°C, using specific heat:

Q2 = 4,184 kJ/kgC * 1 kg * 10В°C = 41,84 kJ

Q3=Q1+Q2= 373,84 kJ = 373.840 J

Amount of heat generated within a wire:

Q3 = U x I x t

373.840 = 12V x 3A x t

t = 373.840 / 12 / 3

t = 10384s = 2.88h

 

Well.....Again the question is kinda flawed, so that's your answer.