Science & Mathematics - 30 November 2007

fifth term of (2x-1)^7
tenth term of (4a+2b)^10

2007-11-30 02:04:50 · 4 answers · asked by lindi 1 in Mathematics

2007-11-30 02:02:02 · 27 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-30 02:01:53 · 10 answers · asked by RoRoStar 1 in Astronomy & Space

If A and B are subsets of a metric space (X, d), the distance between them, d(A,B), is defined as d(A, B) = infimum {d(a, b) | a is in A, b is in B}. Show that:

a) If the closures of A and B intersect, then d(A,B) = 0. Is the converse true?

b) If A is compact, B is closed and A and B are disjoint, then d(A,B) > 0. If, instead of assuming A is compact, we just assume it's closed, then is it still true that d(A,B) > 0?

Thank you

2007-11-30 01:56:24 · 4 answers · asked by Edson 1 in Mathematics

If you heat 1200 grams of water from 22.3'C to 78.9'C, how many joules of heat did it absorb?

2007-11-30 01:50:18 · 4 answers · asked by Anonymous in Chemistry

Multiply. Express each result in scientific notation.
1. (2 times 10^5)(3 times 10^2)
2.(6 times 10^-4)(1.2 times 10^-3)

2007-11-30 01:49:02 · 3 answers · asked by Anonymous in Mathematics

Who did discover the earth's atmosphere for the first time. Also, it is possible a bit more details about the whole subject

2007-11-30 01:48:51 · 6 answers · asked by slm880 1 in Earth Sciences & Geology

2007-11-30 01:44:19 · 3 answers · asked by Anonymous in Physics

Phosphate, Ribose, Uracil

a. in this form , do they represent a (an) amino acid, base, portionof messenger RNA, or deoxyribonucleotide?

b. justify your answer

2007-11-30 01:40:25 · 6 answers · asked by chg 1 in Biology

2007-11-30 01:39:04 · 11 answers · asked by Anonymous in Biology

2007-11-30 01:38:28 · 1 answers · asked by landroval88 1 in Physics

What is mean by decoder? how to design a decoder?(digital logic)

2007-11-30 01:38:18 · 2 answers · asked by L 1 in Engineering

What is 4-bit asynchronous UP counter means?(digital logic)

2007-11-30 01:36:28 · 3 answers · asked by L 1 in Engineering

i know the suare root of 100 is 10

2007-11-30 01:34:00 · 10 answers · asked by thonia 1 in Mathematics

Enthalpy Change?
NaClO + Na2S2O3 . 5H20
Create ionic equation
Calculate the enthalpy change of react

2007-11-30 01:33:24 · 0 answers · asked by Puka 1 in Chemistry

2007-11-30 01:31:39 · 2 answers · asked by Sciman 6 in Mathematics

Ive always wanted to know, if a fly was like, in a car, does it have to work really hard to keep up with the speed of the car or does it just hover like it was in a stationary room. I used to think that it would have to work really hard because the car is moving really fast, and we dont work hard because we are sitting down on seats. I hope it can be solved!?

2007-11-30 01:30:34 · 19 answers · asked by Niallo! 3 in Physics

sunglasses that permit only the passage of light that's

A. polarized in a vertical plane.
B. dispersed in a vertical plane.
C. dispersed in a spherical plane.
D. polarized in a horizontal plane.

2007-11-30 01:29:14 · 1 answers · asked by Anonymous in Physics

And if it erupted what would it do?

2007-11-30 01:27:14 · 10 answers · asked by Anonymous in Earth Sciences & Geology

A 2.86 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.85 m in 1.70 s.

(a) Find the magnitude of the acceleration of the block.
m/s2
(b) Find the coefficient of kinetic friction between the block and the incline.

(c) Find the magnitude of the frictional force acting on the block.
N
(d) Find the speed of the block after it has slid a distance 1.85 m.
m/s

2007-11-30 01:26:32 · 2 answers · asked by Anonymous in Physics

How does the idea of photons of light explain the photoelectric effect?

2007-11-30 01:24:35 · 2 answers · asked by dk 6 in Chemistry

global human food consumption per day & do the planet have resources like organic firtilizer to generate food to meet the requirements of new generation in relation to current & forcasted global birth rate? If not what are the alternatives?

2007-11-30 01:24:05 · 2 answers · asked by upaliwickramathilaka 2 in Botany

y=-x
y=-x-4

next problem:

y=2x + 7
y=2x - 3

ALso show all of your work. please

2007-11-30 01:21:29 · 6 answers · asked by Anonymous in Mathematics

The coefficient of static friction between the 3.01 kg crate and the = 26° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down the incline?

2007-11-30 01:14:04 · 1 answers · asked by Anonymous in Physics

what wedside it is on ?

2007-11-30 01:12:35 · 5 answers · asked by her_lov_him 1 in Biology

2007-11-30 01:12:04 · 5 answers · asked by Anonymous in Weather

What evidence to people have that we did not land on the moon?

2007-11-30 01:10:44 · 14 answers · asked by Anonymous in Astronomy & Space

2007-11-30 01:04:51 · 1 answers · asked by Anonymous in Physics

i want a shape i can make my brochure into. My brochure is about glaciers.

2007-11-30 01:02:48 · 2 answers · asked by Anonymous in Earth Sciences & Geology

how quick and how easily can they locate the supposed remains of lunar surface missions?


I personally dont believe they landed on the moon, judging by the lies they have told for decades about other things, but I will be happy to apologise if the Japs DO send back photographic evidence.

2007-11-30 00:54:50 · 10 answers · asked by dogzrule 2 in Astronomy & Space