Number of results: 54,913
Physical Science Question 3
Compare the visible part of the ear to a satellite dish in terms of form and function. I will be happy to critique your thinking on this. WTF bobpursley? You are of no help to me on any of this! If I want you to "critique my thinking" I was ask you to, but no where in my ...
Tuesday, June 20, 2006 at 10:14am by Liz
convert .621 hl to liters .013 dl to liters .00078 mg to kg 2.45 g to cg 1.9 km to cm .0476 mm to dam 6.4 ul to nl need conversion and scientific notation before I can proceed from there to the lesson. This was part of an intro that I missed due to illness. Thanks. so ...
Sunday, October 1, 2006 at 5:53pm by paul
I see others have asked the same question but I do not understand the answers given. Question is to do with zinc solid and dilute sulphuric acid. What substance is left? I see by other posts that Bob Pursley answered this question. I haven't seen his answer but here is a hint...
Sunday, October 15, 2006 at 12:21pm by teddy
How does osmosis explain the fact that a watery syrup forms when you put sugar on strawberries? Does the water in the strawberry cells rush out to the outside to dilute the sugar on the outside? Bob Pursley has answered this question for you. I also answered it a couple of ...
Wednesday, October 25, 2006 at 9:07am by Ally
Is this the correct way to solve these math problems and are the answers correct. Directions:Solve the following applications. Science. Jose rode his trail bike for 10miles. Two-thirds of hte distance was over a mountain trail. How long is tehe mountain trail? 2/3 (x)10= 6 and...
Wednesday, December 6, 2006 at 2:54pm by Jasmine20
Please can you assist me with the following problem I am totally muddled - I could swear I've never even heard of science!!! H2SO4(aq) ---> 2H+(aq)+(SO4^2-)(aq) A 0.21 g sample of sulfuric acid is dissolved completely in sufficient water to make 0.25 litre of final solution...
Monday, February 5, 2007 at 6:25pm by Billy
sorry mr bob purlsey again to annoy you. so i did all my calculations and read about hooke's law yesterday and presented to my teacher. however i was not allowed to used hooke's law because we haven't learned it yet and i did not know how to connect potential energy to force ...
Thursday, June 14, 2007 at 11:16pm by physics(sorry)
What is Zimmerman Reagent made of? (I know it is acidic b/c I was told after it burned a hole in my jeans) acid? You must mean Zimmermann-Reinhardt reagent (79 g MnSO4, 100 mL of concentrated H2SO4, and 200 mL of concentrated H3PO4, diluted to 1 L) Zimmerman reagent is equal ...
Monday, July 16, 2007 at 4:23pm by christina
Why would a potato cook faster if you poke holes in it with a fork before microwaving it? ~My thinking is that it would increase the surface area..but this could be just partially why it cooks faster. Thank You =D I dont know in a microwave it cooks faster. If you poke holes ...
Tuesday, August 21, 2007 at 6:07pm by ~christina~
ap chemistry please BOB HELP ME
This doesn't change Bob Pursley's answer but let me try to help so you will "get the question." The idea in any analytical scheme is to start with a known mass of substance and convert it to something else that is known. You started with brass and converted the Zn in the brass...
Sunday, September 9, 2007 at 8:00pm by DrBob222
I believe Bob Pursley answered this question earlier. I don't remember the exact quote but it went something like this. "There is the possibility of a busted oil line." That should answer your question.
Tuesday, October 9, 2007 at 10:18pm by DrBob222
science Dr. Bob /Pursley
this is the chart we were given S = empty square 13 columns Question which elemnts are classified as metals. K S S S S S J S S F S S S S S S S S S D S S R S S S S S S
Sunday, November 4, 2007 at 3:01pm by liz
science Dr. Bob /Pursley
I don't get how it is devised. My periodic chart has 18 columns.
Sunday, November 4, 2007 at 3:01pm by DrBob222
Bob Pursley has given you the correct definition of an atomic mass unit. The atomic mass of a particular isotope is very close to an integer that equals the total number of protons and neutrons in the nucleus. There are differences between the actual value and an integer that ...
Sunday, November 4, 2007 at 9:04pm by drwls
right on calcium phosphate. No on monocalcium phosphate. It CAN'T be the same thing because you just wrote Ca3(PO4)2 which would be tricalcium phosphate, would it not? As Bob Pursley suggested in an earlier response, monocalcium phosphate is another name for monocalcium ...
Sunday, December 16, 2007 at 8:09pm by DrBob222
Chemistry - Bob Pursley
Posted by Sarah H on Friday, May 23, 2008 at 8:10pm. Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87...
Saturday, May 24, 2008 at 11:23am by Sarah H
Chemistry - Bob Pursley
Yes, that's where you're getting screwed up. The mole ratio you want is 0.266 mol FeS x (2 mol Fe2O3/4 mol FeS) = 0.133 as Bob Pursley wrote. You don't need to worry about a ratio of oxygen since it's the percent yield of Fe2O3 you want.
Saturday, May 24, 2008 at 11:23am by DrBob222
Bob Pursley is correct. To convert volume to mass, you need to know the density. To know the density to seven significant figures requires knowing the temperature. The density of PURE water is exactly 1000 kg/m^3 at 4 degrees C. At 20 degrees C ("room temperature") it is 998....
Sunday, September 7, 2008 at 12:00am by drwls
Mathmate, Reiny, Bob Pursley
I'm not good at counting these things. You really need a math man to answer this; however, I count 9. Maybe Mathmate, Reiny, or Bob Pursley will do this right.
Saturday, October 23, 2010 at 6:29pm by DrBob222
Writeacher, now that the grammar is OK, I just want to know if everything is correct from a scientific point of view. Could you please ask your science teacher, Bob Pursley? 1) After meeting with the engineer ......... we became interested in exploring the problems of water ...
Wednesday, February 15, 2012 at 12:51pm by Henry2