no. of componenents = 2 (Na2SO4 and water - as each phase can be described by these two components only) no. of phases = 3 ( solid and liquid and vapor) degrees of freedom = 2-3+2 = 1
October 3, 2015
I did a lab and have been graded already. One of the questions asked us to pick good scientific questions from a list of choices. One of the choices read, "What soil properties determine the resulting color of a plant's flowers?". Note: I have changed the wording...
September 5, 2015
GPS satellites orbit the earth about 20,000 km above the surface of the earth. The radius of the earth is 6,371 km. What is the acceleration due to earths gravity on the GPS satellites? i've tried fooling around with the A = V^2/ R and V = 2pir/T equations, but I ...
May 1, 2015
Sarah is filling a glass sphere with decorative sand. The radius of the sphere is 2 inches. Which is closest to the minimum amount of sand Sarah needs to completely fill the glass sphere?
April 23, 2015
indian ridian ridge
Simplify the given expression to rational exponent form and justify each step by identifying the properties of rational exponents used. All work must be shown. 1/cubed root of x to -6 exponent
March 7, 2015
If you place $2,000.00 in a savings account with an interest rate of 4.5%/month versus an account with a rate of 3.75%/month, how much more interest could you earn in that month using the first account?
March 2, 2015
chemistry (Bohr model)
The second ionization energy of He is almost exactly four times the ionization energy of H, and the third ionization energy of Li is almost exactly nine times the ionization energy of H: IE (MJ mol-1) H(g) --> H +(g) + e- (1.3120) He+(g) --> He2+(g) + e- (5.2504) Li2+(g...
February 9, 2015
A particle carrying a charge of 6.0uC is located at the origin of a rectangle coordinate system, and a particle carrying a charge of 4.0uC is located at (0,5.0m). What are the magnitude and direction of the electric field at the positions (5.0m,0), (-5.0m,0), and (0,-5.0m)?
February 5, 2015
A positively charged solid sphere of radius 100 mm has a uniform volume charge density of 250 nC/m^2. Determine the electric field (a) 20 mm, (b) 90 mm, and (c) 110 mm from the center of the sphere.
February 5, 2015
If you have 5.6 mL of 95% hexanes to 5% ethyl acetate, how many mL of 85% hexanes to 15% ethyl acetate can you make? Assume unlimited supply of pure ethyl acetate.
February 2, 2015
How can I make this sentence present tense? Or is it already present tense? The problem I'm having is with the word "banished" which is past tense. And my teacher wants us to write in the present tense. I have the main verb present so does that make the whole ...
November 9, 2014
NO2 + H2 <-> NO + H2O [H2] = .30 mol/L [NO2] = .20 mol/L [NO] = [H20] = .70 mol/L @ 1000K A. What is the mole fraction of NO in the equilibrium mixture? B. Calculate Kc C. Determine Kp in terms of Kc D. If system is cooled to a lower temperature, 35% of NO is converted ...
October 28, 2014
I'm writing a paper to explain a concept of the bevel Ella Minnow Pea. I've come up with a thesis statement and my teacher has approved it, but I'm just stuck as to what I'm writing about. The assignment instructions asks "How does Dunn legitimize his ...
October 26, 2014
A small relief package is dropped by a helicopter that is descending steadily at 2.0 m/s. a) After 2.5 s, what is the speed of the relief package? b) After 2.5 s, how is the package below the helicopter? I think I need to use the kinematic equations.
September 28, 2014
From a window in a building 20 m above ground the angle of depression of the top of a statue across the street is 30 degrees, and the angle of depression of the base of the statue is 34. How tall is the statue?
June 8, 2014
From a weather balloon high in the air, the angle of depression of a ground marker is 27.8 degrees. If the balloon rises 345 m straight up the angle of depression from this higher point is 46.2 degrees. How high above the ground is the balloon?
June 8, 2014
A disk at rest experiences a constant angular acceleration for t = 85 s, at the end of which it is spinning with a frequency of f = 45 rpm. Please answer the following questions. A)Write an expression for the magnitude of the angular velocity of the disk after the acceleration...
April 26, 2014
How can I write a feel better letter to Miley Cyrus? please help and give me so examples please help HOPE YOU FEEL BETTER [DateDear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time...
April 25, 2014
HOPE YOU FEEL BETTER [DateDear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time. Please accept, then, my sincerest wish that you get better soon. we can meet each other some day ...
April 23, 2014
this is a good letter to send to miley cyrus yes or no HOPE YOU FEEL BETTER [Date] [NAME, COMPANY AND ADDRESS, ex. Dear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time. Please ...
April 23, 2014
1. What are the characteristics of an effective television newscaster? Explain. 2. Why are so many people over the age of twenty-one entering college? Discuss. 3. What could be done to make the public less hesitant to report crime? 4. Do Americans seem unable to relax in ...
April 21, 2014
If Will gives Molly $9 dollars he will have the same amount of money as her. If Molly give Will $9, the ratio of money she has to the money will has will be 1:2. How much money does will have in the beginning?
February 5, 2014
The number of students at a university is 1320, and the number increases by 8% each year. Write an exponential function to model this situation. Then find about how many students there will be in 5 years.
June 9, 2013
Consider the ellipse y^2=1-6 x^2. Its vertices are (0,A) with A= ? its foci are (0,+/-B) with B= ? its eccentricity is ? the length of its major axe is ? the length of its minor axe is ?
May 4, 2013
Find an equation for the parabola that has its vertex at the origin and directrix x=-9. If your answer is in the form x^2=Ay, then input here: A= if your answer is in the form y^2=Ax, then input here: A= .
May 3, 2013
Your mail-order company advertises that it ships 95% of its orders within three working days. You select an SRS of 100 of the 5000 orders received in the past week for an audit. The audit reveals that only 91 of these orders were shipped on time. A) What is the sample ...
April 24, 2013
As a promotion, a store draws the name of a customers each week. The prize is a coupon for the store. If winner is not present at drawing, he cannnot claim the prize and the amount of the coupon increases for the next weeks drawing. the function f(x)= 20(1.2)to the x power, ...
April 21, 2013
Two kg of water at a temperature of 50 degrees C have 485.3 kJ of heat transferred from them, resulting in a mixture of ice/water at 0 degrees C. What is the composition of the mixture? This is what I did and would like verification of my answer. 2*4.183*-50 = -418.3 kJ I then...
March 23, 2013
A quantity of water at 87 degrees C is cooled at a rate of 2844 MJ/h. After 40 minutes, the water has changed to ice, having a temperature of 243K. Calculate the mass of the water/ice. I know 243K = -30 degrees C I'm assuming I have to use my sensible and latent heat ...
March 23, 2013
If 55034.175 kJ of heat are transferred to 150 kg of ice at a temperature of -12.15 degrees C, calculate the temperature of the resulting water. I know my formulas for sensible and latent heat but don't know how to approach this.
March 22, 2013
For some positive constant C, a patient's temperature change, T , due to a dose,D , of a drug is given by T=(c/2-D/3)D^2 What dosage maximizes the temperature change The sensitivity of the body to the drug is defined as . What dosage maximizes sensitivity?
March 6, 2013
A boat is pulled through a canal by horses walking parallel to the canal and exerting a force of 1000 N on a tow rope 40 meters long. If the distance from the boat to the horse track is 15 meters, what is the magnitude of the effective component pulling the boat forward?
March 5, 2013
amy miller's insurance policy has a $218.00 premium for 25/100 bodily injury limits and $25,000.00 property damage limits. the collision premium is $74.00. amy's driving-rating factor is 2.4. what is her annual premium?
February 25, 2013