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Questions (12)
store mixes a Brazilian coffee worth worth $10 per kilogram and a turkish coffee worth $13 per kilogram. The mixture is to sell
1 answer
673 views
write an equation of the line containing the given point and parallel to the given line
(2,-5);3x-4y=9
1 answer
496 views
You have a mass of hot water at 90 C and twice the mass of cool water at 10C. The hot and cold water are mixed together. Will
2 answers
1,344 views
Is it easier to exchange heat between a thermometer and air or between a thermometer and water.
1 answer
731 views
My question is two parts
How many calories of heat energy would it take to heat 200 mL of water from 20C to 80C? a) How long
1 answer
737 views
An elevator weighting 2500 N ascends at a constant speed of 8 m/s. How much power must the motor supply to do this?
1 answer
944 views
The question has three parts, it looks like a lot but it is just description, trying to understand relationships.
1. You toss a
1 answer
834 views
evaluate the double integral and reverse order of integration
[(first integral 0 to 1)(second integral 9y to 9)e^(x^2)dx)dy
0 answers
708 views
using geometry, calculate volume of solid under z= square root of 49-x^2-y^2 and over circular disk x^2+y^2 is less than or
0 answers
523 views
find the volume of solid bound by planes x=0 y=0 z=0 and x+y+z=7
1 answer
489 views
find points on surface z^2=xy+1 are closest to point (4,2,0)
List points as comma-separated list.
0 answers
410 views
find the min and max values
f(x,y,z)=5x+3y+2z on a sphere x^2+y^2+z^2=1
0 answers
364 views
Answers (2)
In response to lobu6058, the deltaHf value for liquid water is correct IF we're assuming standard conditions for this reaction. Specifically, that it is taking place at 25C. Because water is a liquid at 25C, the deltaHf value should be for liquid water.
that makes sense i just didn't think it could be that easy
