Recent content by adamwest

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    Maximum Mass You Could Boil with 1000 J of Heat (Thermodynamics)

    Borek, you were right (and your English is just fine! :) ). Here is how you get the right answer: L vaporization ethyl = 8.79 x 10^5 J/kg Qtotal = Q1 + Q2 = (Energy to heat mass up to boiling point) + (Energy used to boil all of mass) 1000 J = mcΔT + mLv 1000 J = m(cΔT + Lv) m = 1000...
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    Maximum Mass You Could Boil with 1000 J of Heat (Thermodynamics)

    Homework Statement What is the maximum mass of ethyl alcohol you could boil with 1000J of heat, starting from 18∘C?Homework Equations Q=mcΔT c ethyl alcohol = 2400 J/(kg*K) T boil ethyl alcohol = 78 C = 351 K T starting = 18 C = 291 K The Attempt at a Solution m=Q/(c*ΔT) m= (2400 J)/[(2400...
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    Terminal Speed for Skier Going Down Slope

    It looks like you were right, PhantomJay. I should have seen this before but I didn't check my units. The answer is as follows: sqrt((2mg/ACp)*(sinθ-μkcosθ)) If you do it this way then you get all of the correct units (m/s) in the end after taking the square root. I used the following: p...
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    Terminal Speed for Skier Going Down Slope

    Thanks for double checking for me, I really appreciate it. :) I actually tried submitting it with 3 sig figs as well but it said it was wrong. I am going to email my professor and see if they can take a look.
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    Terminal Speed for Skier Going Down Slope

    Homework Statement What is the terminal speed for an 75.0kg skier going down a 35.0∘ snow-covered slope on wooden skis μk= 0.060? Assume that the skier is 1.60m tall and 0.300m wide. Express your answer using two significant figures with the appropriate units. Area skier = A =...
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    Uniform Circular Motion Question (Mechanics/Physics I)

    Uniform Circular Motion Question Please Help! (Mechanics/Physics I) A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in Figure P6.10. The length of the arc ABC is 200 m, and the car completes the turn in 34.0 s. (figure attached as...
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    SETI Binary Message Decoding Question

    Got it, thanks! :) Just hearing that it was not an image was enough to make me stop drawing filled-in boxes. I think I will celebrate by eating some pie
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    SETI Binary Message Decoding Question

    Homework Statement An advanced alien civilization residing on a planet orbiting Alpha Centauri A, a class G2V star only 4 LY away, detects radio emanations from the star Sol (our Sun) and concludes that it is of intelligent origin. The aliens decide to try and establish contact with the...
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    High School What is the distance between two parallel lines using the distance formula?

    I feel like a total noob, but my friend is reviewing distance formula and asked for my help. I can't seem to get the correct answer, which his teacher wrote as (3√5)/5 What is the distance from the line y=2x to the parallel line y=2x+3? The vertical distance is obviously 3, but that is not...