March 31, 2015

Posts by Maria

Total # Posts: 1,614

Was Mercury the first superconductor? No. http://www.jiskha.com/display.cgi?id=1161728962 see what happened in 1962 Thanks for your answer. Would you please let me know if steel is a superconductor? never mind, it is not.
October 24, 2006

Where do I start to prove this identity: sinx/cosx= 1-cos2x/sin2x please help!! Hint: Fractions are evil. Get rid of them. Well, cos2x = cos2x - sin2x, so 1-coscx = 1 - cos2x - sin2x = 1 - cos2x + sin2x You should be able to simplify this to 2*something squared. The ...
October 21, 2006

1. Calculate the heat (calories) produced by the solution of 3.75 g of NaOH Hint: Remember that the reaction is exothermic. 2. Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (ΔHsolnNaOH) For #1. delta H(...
October 19, 2006

determine the correct molecular shapes of XeF4, GeF4, and SeF4 (Broken Link Removed)
October 5, 2006

Using electronegativity arguments, classify the following diatomic molecules as nonpolar (N), polar (P), or ionic (I), and enter five letters in order (e.g. NPNPI, INPNP, etc) : NaF, HF, NaH, CaO, and F2. Look up electronegativity (EN)of each element and subtract to obtain a ...
October 5, 2006

A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration. a) What was the average speed of the runner? b) What was the runner's time? c) What was the acceleration? a) half the final speed b) distance/(average speed) c) (...
October 2, 2006

State what conclusion can be made IFx=5 and the given statement is true IFx>x=z, then y=14z. I don't understand this part of your statement: "IFx>x=z," Please clarify this. If x>X-2, then y=14x Ok, I will suppose this is the question then "State ...
October 2, 2006

Identifying controls and Variables
i need help on controls and variables
October 1, 2006

Find the slope and the intercepts of each line. g(x)=54x-1 x=-3 Help please! :) g(x)=54x-1 x=-3 I am assuming that you are trying to determine the value of g(x) when x equals -3. If g(x)=54x-1 , then g(-3)=54(-3)-1 Evalute and you have your answer. No, sorry. g(x)=54x-1 and x...
September 23, 2006

the velocity is -24.65. the distance is 30.66 m
September 17, 2006

I'm not quite sure about these problems. I know how to do them, but it seems that I get the wrong answer. Maybe I'm supposed to get 'no solution' but I'm not sure. Could someone please help me with them? 5|6-5x|=15x-35 2|3x-7|=10x-8 1/4|4x+7|=8x+16 Ok for 5...
September 14, 2006

APPROXIMATELY, how much galloons of gas would it take to drive 4.4 miles? Does not have to be exact, just an idea.... The answer would depend on the average number of miles per gallon the vehicle gets. It might also depend on the road and weather conditios (going up or down ...
September 1, 2006

making dot arrays
which of the following # can be arrangerd into arrays w/ two rows:9,16,2,15,20,33
August 21, 2006

friday May, 3 2008 This site is awesome this is Axia studentsite. keep working this site is ours
July 20, 2006

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