Recent content by textbooks

Write the following log equations as exponential equations and vice-versa. 1.) ln 0.5 = - 0.6931 Differentiate with respect to x. 2.) y = e^x(sin x + cos x)

thanks but how to post in homework forum? i am new in here

Write the following log equations as exponential equations and vice-versa. 1.) ln 0.5 = - 0.6931 Differentiate with respect to x. 2.) y = e^x(sin x + cos x)

I've been trying (unsuccessfully!) to rearrange the following equation so that H is the subject: mgH = [k(H - L)^2] / 2 (Where ^2 means squared.) I also have some test data which shows that if m = 50, g = 9.8, k = 40 and L = 20, H should equal 57.5, or thereabouts

Consider a 5.430-g mixture of FeO and Fe3O4. You react this mixture with excess of oxygen to form 5.779g Fe2O3. Calculate the percent by mass of FeO in the original mixture.

can you just tell me why KNO3 (aq) and BaCl2 (aq) & Na2SO4 (aq) and KCl (aq) have no chemical change? Why is there no reaction between these?

In the Wolfram Mathworld section on spherical coordinates there's given a list of nine covariant derivatives. The derivatives are given with respect to radius, azmuth, and zenith using the usual symbols r, theta and phi. The question is: what would be examples of the vectors whose derivatives...

If you have a certain number of particles such as a few electrons and protons in an area, how would you determine the electric potential and such if you knew the position and charge of the particles? Can you do that?

Does the existence of the proton neccessitate the existence of the electron? I think it is strange that the number of electrons is exactly equal to the number of protons at every event level of the universe.

U-235 is most suitable for bombardment by slow neutrons 'cause it becomes U-236,providing for a more balanced nucleus. So if the electron shells are arranged something like 2,4,8,16,32,18,8,2 the atomic number only changes, in this case, because of an additional neutron. Is this element in a...

It might be a silly question but I was just wondering if this was unprovable or false... Thanks guys

Neutrons bind Protons in nuclei, and/or the other way around, but why don't Neutrons bind Neutrons, with clumps of neutrons whizzing about? And, I'm guessing this is related: Why is a Neutron unstable outside its nucleus with about a 10.3 minute half-life?

a) Let f:N*N->Q be defined by f(m,n)=(m-3)/n. Determine if f is injective or surjective. b) Show that if f:A->B and g:B->C are both bijective, then the composition (g o f):A->c is also bijective. Solve the recurrence relations a(r)-5a(r-1)+6a(r-2)=2^r+r (r,r-1,r-2 are all subscripts)