Science & Mathematics - 11 October 2006

that seven divides 5^(2n)+3*2^(5n-2)
dont use induction
use congruence

2006-10-11 09:55:58 · 3 answers · asked by Anonymous in Mathematics

2006-10-11 09:55:51 · 6 answers · asked by twinkie 1 in Mathematics

when i was little i would see my dad cut a branch, stick a leaf of another tree in the space where the branch was, and seal it wit wax, and get a fruit mix.....is it possible?..

2006-10-11 09:54:49 · 8 answers · asked by ha h 1 in Botany

2006-10-11 09:53:45 · 6 answers · asked by punkMOM 1 in Astronomy & Space

What is it like?

2006-10-11 09:51:30 · 15 answers · asked by cucumis_sativus 5 in Zoology

What did tornadoes sound like before the invention of the freight train.

2006-10-11 09:51:14 · 3 answers · asked by Anonymous in Weather

2+1/a all over 2/a-a

2006-10-11 09:51:06 · 3 answers · asked by Anonymous in Mathematics

Can anyone please help with the following problem? We are studing solving exponential equations.

2^(3x+1) = 3^9x-2)

2006-10-11 09:48:36 · 7 answers · asked by ctjarig 1 in Mathematics

2006-10-11 09:47:28 · 10 answers · asked by bubbabtheone2 1 in Geography

Mixture by Acid-Base Titration?
A 1.00-g solid sample containing a mixture of table salt (NaCl) and citric acid (H3C6H5O7, a triprotic acid) is dissolved in 15 mL of water.

Titration of the acid solution requires 13.40 mL of 0.7318 M NaOH solution to reach the endpoint.

Calculate the mass percent H3C6H5O7 in the solid mixture.

_______%

Can Anyone Figure This Out For Me & Explain How They Derived The Answer

2006-10-11 09:46:27 · 2 answers · asked by Magnitudex 2 in Chemistry

2006-10-11 09:46:02 · 2 answers · asked by marpiesharker 1 in Mathematics

In an exothermic chemical reaction, how is energy released? Usually it is simply expressed as reactants -> product + energy. But how is that energy emitted?

I understand the release of electromagnetic energy through photons, but what other vehicles are there? Do the molecules gain random kinetic energy? Is it vibrational energy (phonons)?

2006-10-11 09:45:07 · 2 answers · asked by AskBrian 4 in Physics

Find:
(a)
the centripetal force
(b)
the coefficient of friction if there is no banking to the curve
(c)
the banking angle if there is no friction

2006-10-11 09:44:57 · 3 answers · asked by Anonymous in Physics

2006-10-11 09:44:45 · 2 answers · asked by hmmm 1 in Physics

find the slope of the line passing through the points (-7,-4) and (-1, -10).

2006-10-11 09:44:40 · 6 answers · asked by Malina 1 in Mathematics

Antimony is alloyed with lead to increase the rigidity of components used in the construction of lead storage batteries.
2.778 g of a particular metallic alloy, compounded of only Pb and Sb, can be quantitatively converted into a 3.234-g mixture of the oxides PbO2 and Sb2O4.

What was the percentage (by mass) of antimony in the alloy?

__________ %

Also Explain Answer And Show Steps...

2006-10-11 09:44:35 · 1 answers · asked by Magnitudex 2 in Chemistry

The present ages of a husband and wife are in the ratio of seven to six. Five years ago the ratio was six to five. What are their ages now?

The choices are:
h: 35 yrs and w: 30 yrs
h: 41 yrs and w: 35 yrs
h: 49 yrs and w: 42 yrs
h: 56 yrs and w: 49 yrs

2006-10-11 09:43:40 · 6 answers · asked by Anonymous in Mathematics

Find the orbital velocity of a satellite at this altitude....

any help is appreciated....

2006-10-11 09:42:04 · 1 answers · asked by Anonymous in Physics

It says to find the height of a trapozoid with bases equal to 10ft and 18ft, I don't know to find the height though!
Can anyone give me a formula?

2006-10-11 09:41:26 · 7 answers · asked by Anonymous in Mathematics

y^2-y+5/y+4

2006-10-11 09:40:27 · 3 answers · asked by Anonymous in Mathematics

It is a question for a homework assiment!

2006-10-11 09:40:24 · 1 answers · asked by Spring 2 in Biology

passed over a frictionless pulley.
Find the acceleration of the system and the tension in the string if the surface is:
(a)
smooth, and
(b)
the coefficient of friction is 0.190

2006-10-11 09:38:19 · 3 answers · asked by Anonymous in Physics

2006-10-11 09:37:35 · 5 answers · asked by dawn h 1 in Mathematics

can someone explain to me in depth how to preform the combined gas laws i dont also know what p1 v1 = p2 v2
-------- -------
t1 t2

2006-10-11 09:37:12 · 2 answers · asked by sdrebo131 1 in Mathematics

this is another math problem my child is trying to answere. can you help?

2006-10-11 09:36:55 · 8 answers · asked by G'smom 1 in Mathematics

Find:
(a)
The force parallel to the plane,
(b)
The acceleration if there is no friction,
(c)
The coefficient of friction if the object is just at the point of sliding,
(d)
The acceleration of the block if the coefficient of sliding friction is 0.280

2006-10-11 09:35:53 · 2 answers · asked by Anonymous in Physics

i am looking for anyone that has information or experiences on the concept of time travel, healing, energy vs matter - wherever you are - that is what i want to know about. thank you for the light.

be playful and open with your answers. can you see the dolphins?

2006-10-11 09:35:10 · 2 answers · asked by annie - rainbow goddess 4 in Physics

i need 2 kno wat a phylum and a kingdom is i just want 2 make sure if im rite can u give an example. like a phylum is a ........ and a kingdom is an .....................

2006-10-11 09:32:09 · 4 answers · asked by i FOUND MA PRiNCE CHARMiNG♥ 3 in Other - Science

What is the largest piece of matter that will exibit wave/partical dualality in a double slit experiment? I know a photon, electron, neutron, proton, and ion, an atom, well how bout an molecule? I heard it stated in a documentary that even mulitple atom molecules exhibit duality....so it is not just light or e.m. energy or quanta that exihibit w.p.d. as is usually taught...what are the implications of this distinction. Thanks ya'll I am a shadetree quantum mechanic and its probably a good thing particle accelerators are so hard to build!

2006-10-11 09:32:01 · 5 answers · asked by akamadscientist 1 in Physics

earth, our home planet

2006-10-11 09:31:56 · 10 answers · asked by san9202004 1 in Earth Sciences & Geology