# Search results

1. ### How much does the temperature of a river rise in going over 30 m?

So I calculated the potential energy to be 294 Joules. So would the increase in kinetic energy equal 30?
2. ### How much does the temperature of a river rise in going over 30 m?

Homework Statement Assuming no heat is transferred to or from the surroundings, how much does the temperature of a river rise in going over a 30 m falls? (assume the velocity of the water is the same above and below the falls) Homework Equations Δl = αlΔT The Attempt at a Solution H = 0 and...
3. ### How much ice melts in water?

Great! Thank you Chestermiller and gneill!
4. ### How much ice melts in water?

Right, so I got 83.38 kJ/(333 kJl/kg) = .25 kg. So .25 kg. Is this right?
5. ### How much ice melts in water?

Sorry, i meant the 83.38 kJ
6. ### How much ice melts in water?

gneill: Ok, so the formula that pertains to that phase is ΔQ = Lm. I know that L is the latent heat of fusion for water so it is 333 kJ/kg. Would the change in heat be the 3.38 kJ? Chestermiller: I found the change in heat for the lemonade form 20-0 °C to be 83.38 kJ.
7. ### How much ice melts in water?

A phase change occurs, but the problem does not give the mass of the ice.
8. ### How much ice melts in water?

Homework Statement Ice at 0°C is added to a 1 kg of lemonade cooling it from 20°C to 0°C. How much ice melts? (The heat capacity of lemonade equals that of water.) Homework Equations Q = mcΔT The Attempt at a Solution Found the heat in of the lemonade to the ice... = 83.38 kJ and don't...