Quantum mechanics, eigenfunctions!
Determine if the function sin(x)*e^(ax) where a=constant is an eigenfunction of the operators d/dx and d^2/(dx)^2 Okay. My understanding is that you use the operator and perform its "thing" on the function. In this case, you will have to find the 1st derivative of ...
Thursday, October 8, 2009 at 9:30pm
I'm completely stuck on this question.. Trade barriers only work when..? -infant industries receive the protection. -the United States does not have a trade deficit. -American money is kept in the United States. -other countries do not use trade barriers. I want to say the...
Thursday, October 8, 2009 at 2:48pm
In a fifth grade class of 16 students, one-half of the students arrived at school early,one-fourth arrived on time, and one-eight arrived late. On that day how many were absent? Solve using comparison bars.
Wednesday, September 30, 2009 at 8:06pm
what is the precipitate formed when HCl is added? I believe the answer is NaCl, but I am not sure and this precipitate only formed in the first NaOH extract, as precipitate was essentially nonexistent in the 2nd extract? Below is what was done in the experiment. Also, does the...
Monday, September 21, 2009 at 10:38pm
list each of the activities that follow under the appropriate heading. base your decisions on whether the activity promotes or jeopardizes good health. i think i get this but . can anyone please help me on the 2nd part where it says base your decisions on whether the activity ...
Sunday, September 20, 2009 at 9:42pm
charles I and the civil war 2 1642-49 name a parliamentary victory of 1644 on july 2nd 1644 when the royalist forces were busy cooking their suppers, the roundheads made a surprise attack , scattered the royalist forces and won the vital battle of marston moor. is this right, ...
Saturday, September 19, 2009 at 10:29pm
Sue is able to make six beaded bracelets each month. If Sue begings on January 1st, how many bracelets will she be able to finish in time for the craft sale on May 2nd? What strategy might work to solve this problem
Thursday, September 17, 2009 at 10:19pm
A student threw a ball directly upward from the balcony of a building. The height of the ball as measured from the ground "t" seconds after it was thrown, is given by the expression h= -16t(2nd power) + 64t + 768 When does the ball reach the ground?
Monday, September 14, 2009 at 1:25pm
My teacher is averaging up our grades in one area instead of including them all on our report card. For example, he is putting in one grade for the tests (the average of the grades) instead of including each individual grade for all of the tests. Are these two the same thing, ...
Tuesday, September 8, 2009 at 3:48pm
1. - What's wrong? - I have an important exam tomorrow. - Don't worry too much. (Is the short dialogue grammatical?) 2. Food also can help people's feelings. 3. Food can also help people's feelings. (Which one is correct between 2 and 3? Are both OK?) 4. You ...
Monday, September 7, 2009 at 6:02am
i am wanting to make sure this is correct. the complete subject and the simple subjects of the following. The two-and-a-half-month-old child received 2nd degree burns across the bridge of his nose. Complete: The two-and-a-half-month-old child simple is child? It was suggested ...
Tuesday, August 11, 2009 at 2:53pm
What percent by mass does the water constitute in Na2SO4*10H2O? Determine the formula for the hydrate of cobalt (II) acetate from the following data. Mass of crucible and lid= 28.945g Mass of crucible, lid, and hydrate= 29.986g Mass of crucuble, lid, and anhydrous salt= 29....
Sunday, August 2, 2009 at 7:48pm
Sara sets up an experiment with a control group and an experimental group to study how reading to preschool children may improve their first-grade reading achievement scores. In her study, the independent variable will be a. first- grade reading achievement scores. b. reading ...
Saturday, July 4, 2009 at 6:04pm
In a competition, only the top 3 horses recieve prizes. How many possible ways can a 1st, 2nd, and 3rd prize be awarded if the competition has 12 horses? A. 36 B. 220 C. 440 D. 1320 Also, is this a permutation or a combination? Please Help!! Thank you.
Wednesday, June 10, 2009 at 9:11pm
In a competition, only the top 3 horses recieve prizes. How many possible ways can a 1st, 2nd, and 3rd prize be awarded if the competition has 12 horses? A. 36 B. 220 C. 440 D. 1320 Please Help!! Thank you.
Wednesday, June 10, 2009 at 8:27pm
I am hoping to receive help getting started with this problem, possibly some steps in the correct direction. Here is the question: 5.0mLs of a 6.0M solution of HCl was transferred to a 1000ml volumetric flask and diluted to volume w/ water. 50mLs of this solution was then ...
Tuesday, June 9, 2009 at 6:31pm
9th grade classes
I'm choosing which classes I want to take for freshman year but I'm not sure what I need to take. Right now I've only decided on Geometry and English 1. What science do I take for 9th grade? I'm looking for the easiest courses available. Thanks -MC
Tuesday, May 26, 2009 at 1:42pm
compare the two quantities and determine whether the first one is the greatest, the second is the greatest, the two are equal, or the relationship cannot be determined from the information given... 1st: the slope of the line that contains A(2,4) and B(-1,3) 2nd: the slope of ...
Monday, May 18, 2009 at 10:01pm
algebra I need immediate help with this question T
The 2nd question has a fraction and I think this is confusing me on this one f(x)=1/5(x+7)^2+7 I need to find the vertex line of symmetry max/min and is the value f(-7)=7 a minimum or a maximum?
Sunday, May 10, 2009 at 2:35pm
help me with sequences problem.So if the sequence is 2,5,10,17,26 +3 +5 +7 +9 1st difference +2 +2 +2 2nd difference then the nth term can be worked out by writing out : n 1 2 3 4 n squared 1 4 9 16 original sequence 2 5 10 17 nth term= n squared+1 but what about this question...
Saturday, May 9, 2009 at 10:02am
CAN SOMEONE PLEASE HELP ME AND TELL ME IF IM RIGHT Explain which statement is correct: energy is lost when water is boiled or the energy used to boil water is present, but it is no longer in a usable form unless you use work or heat to make it usable. i think that the 2nd one ...
Tuesday, April 28, 2009 at 8:37pm
CAN SOMEONE PLEASE HELP ME AND TELL ME IF IM RIGHT OR WHAT ????!!!!!!!!! Explain which statement is correct: energy is lost when water is boiled or the energy used to boil water is present, but it is no longer in a usable form unless you use work or heat to make it usable. i ...
Tuesday, April 28, 2009 at 7:52pm
Suppose you buy flour and cornmeal in bulk to make flour tortillas and corn tortillas. Flour costs $1.50/lb. Cornmeal costs $2.50/lb. You want to spend less than $9.50 on flour and cornmeal, and you need at least 4 lb altogether. Write a system of inequalities that describes ...
Thursday, April 23, 2009 at 5:39pm
6th grade vocab
What does the word "predominant" mean? Oh and please don't give me a website with some big def. I am in 6th grade so I won't understand if the def. is big and long. It also helps if you use it in a sentence . . . just saying. :-D Thanks so much!
Monday, April 13, 2009 at 5:45pm