Tutors Answer Your Questions about expressions (FREE)
Question 188789: I started the problem, but not sure if i did it right and I'm not exactly sure what the question is asking me to do. I was given a formula and guessed how to get the answer. Any help is much appreciated!
Problem as stated on homework:
1.) A simple model for the mutual potential energy, V, of a pair of inert gas atoms is the Lennard-Jones function, , where r is the distance between the atonms and E and a are positive constants (E having units of energy, while a has units of distance).
a.) At what distance between the atoms is the potential enery a minimum?
I looked up some info on Wikipedia and found that
F.Y.I.in the numerators r is regular size and 'min' is subscript.
then where is the distance at the minimum of the potential.
b.)What is the value of the potential energy?
If if i did the first part wrong, my answer will be wrong here. Also, i don't know how to get a number value from the equation above...
Thank you very much for any help! If anyone could please send this to me by the sometimes tonight. I have to turn it in by 3:15pm on monday.
Click here to see answer by Alan3354(69443)  |
Question 190842: We are working on logarithms. This was added to our prefinal homework. I am so confused at this point.
Given F(x) = 3x-2, evaluate the following.
a. F(-4)
b. F(-1)
c. F(0)
Here is what i've done so far after several attempts I keep doing it different and confusing myself. I need to understand as finals are next week. Thank you for any help.
f(F,x)=3^(x-2),F(-4)
Evaluate F(-4) by replacing x with -4 in the function.
F(-4)=3^((-4)-2)
F(-4)=(1)/(729)
((1)/(729))
Click here to see answer by jim_thompson5910(35256) |
Question 191041: Every time I work these I get lost. I'm working out review of a crash class (7weeks) to take a final Friday and my confidence of understanding these is still not good.
Given f(x) = e-2x + 1, evaluate the following. Round to the nearest ten-thousandth.
f(-1)
f(3)
f(-2)
Show your work here:
f(-1)=e -2(-1)+1=x-1
f(-1)=e^2+1
f(-1)=7.389+1
f(-1) = 8.389
Click here to see answer by solver91311(24713)  |
Question 192680: How do I solve 2t squared minus 6t minus 20 equal zero
How do I solve y=(2x + 3)(minus 5)?
how do I solve x squared + 2x=8
What is the factored form of 3x squared plus 11x-4
The Teacher did not hand out Math books. Therefore, I cannot provide you with an ISBN
Click here to see answer by stanbon(75887) |
Question 196970: A food store makes a 9-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50 per pound, cashews cost $2.00 per pound, and raisins cost $1.00 per pound. The mixture calls for twice as much peanuts than cashews. The total cost of the mixture is $13.00. How much of each ingredient did the store use?
Click here to see answer by Edwin McCravy(20060)  |
Question 197141: a strawbroom is made up a broom handle and broom shafts attached to the end of the broom. if the total length of the straw broom is broom is 63 inches. write and expression for the length of the handle if the broomcorn shafts are x inches long.
Click here to see answer by stanbon(75887) |
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