Science & Mathematics - 9 January 2007

2007-01-09 09:19:26 · 18 answers · asked by Anonymous in Chemistry

there are 16 workers employed on a highway project, some at $200 per day and some at $165 per day. The daily payroll is $2745. Find the number of workers employed at each wage. could u tell me how u did it too if u just happen to figure this out. Thanx so much!

2007-01-09 09:18:31 · 8 answers · asked by ♥kimbo141232 2 in Mathematics

Subtract and Simplify:
(sinx-1 / cosx) - (cosx / sinx-1)

2007-01-09 09:18:03 · 1 answers · asked by virginiawahoo13 1 in Mathematics

Lexapro has been very effective for social anxiety for the past several years. No panic attacks, no more headaches or backaches, better self esteem...but I need to nap now & then & I've gained about 10 lbs of belly fat...yuk!

2007-01-09 09:17:41 · 5 answers · asked by birdie 6 in Medicine

2007-01-09 09:16:33 · 15 answers · asked by mac 1 in Medicine

Consider the four charges in Figure P25.46 http://i137.photobucket.com/albums/q208/infinitbelt/p25-46.gif , in which d = 3 cm, q = 4 nC, the +x-axis points to the right, and the +y-axis points up. What is the force on the 1 nC charge at the bottom? Give your answer in component form, using i and j for and , respectively.

I am confused as how to start such problems. Any ideas?


Thanks!

2007-01-09 09:16:10 · 1 answers · asked by Anonymous in Physics

My 12 year old son has this math problem that I can not for the life of me figure out. Can someone please help, just so that I know how to help him? I'd be forever grateful!

What different items can Julio buy to come close as possible to spending $5.00? (My son says that his teacher said they should come up with the answer of $4.98....)

Milk $2.47

Eggs $1.09

Cheese $1.95

Bread $0.68

Honey $1.19

Cereal $3.25

Avocado $0.50

Chipotles $1.29


He and I have worked out various addition problems with different items from the above list and never could come up with anything higher than $4.94 and it's driving me nuts. It's probably a very obvious answer and going to make me feel even more stupid than I am right now once I see it but oh well.....

HELP ME PLEASE!

2007-01-09 09:15:23 · 6 answers · asked by Jen 5 in Mathematics

2007-01-09 09:14:37 · 13 answers · asked by proudirish33 1 in Mathematics

this is about vocabulary so it is the one you have to use words like orbit,solar,constellation,marveled,and universe and so i need to make a paragraph that is supposed to be about a new planet and i kinda dont know what to do so i need it by friday please people answer this question make up your own name for the planet but use this words orbit,solar,universe,marveled,constellation and i need it so just make up a name for the planet that you made up and the planet cant be one of the planets we have you have to make your own so plz help!

2007-01-09 09:14:36 · 6 answers · asked by ashley a.k.a twizzler missy a 1 in Astronomy & Space

2007-01-09 09:13:14 · 18 answers · asked by Anonymous in Biology

why do muntain climbers need to carry oxygen to breathe at very high altitudes?

asap thanks

2007-01-09 09:13:10 · 6 answers · asked by nargis 2 in Biology

Prove the identities?
1) cos^6 + sin^6 = 1-3sin^2x +3sin^4x
2)tan(x+y)tan(x-y) = (sin^2x- sin^2y)/(cos^2x-sin^2x)
3)sin(5x) = sinx[ cos^2(2x) - sin^2 (2x)] + 2 cosx cos(2x)sin(2x)
4) sin^2 + cos^4 = cos^2+sin^4

2007-01-09 09:12:54 · 5 answers · asked by niki 1 in Mathematics

2007-01-09 09:11:59 · 4 answers · asked by Georgette W 1 in Mathematics

Please show out the steps. I'm stuck

2007-01-09 09:11:56 · 3 answers · asked by lpkegirl 3 in Chemistry

How much work is done in pumping all the water over the edge of the trough? Assume the water weighs 62.5lb/ft^3

2007-01-09 09:09:38 · 2 answers · asked by Georgette W 1 in Mathematics

2007-01-09 09:08:41 · 8 answers · asked by Anonymous in Biology

Can the conductors to the gas and water be left with a csa of 6mm and also electrode conductor be left at 6mm . no cables go underground and are in capping in walls. consumer unit has 100mA rcd with split load 30mA rcd for sockets

2007-01-09 09:08:23 · 2 answers · asked by GARRY G 1 in Engineering

2007-01-09 09:07:44 · 8 answers · asked by JEFF D 2 in Astronomy & Space

The area of a rectangle is 45 square inches. One dimension is 5 inches.What is the perimeter?

2007-01-09 09:07:08 · 22 answers · asked by Makayla 1 in Mathematics

Simplify x^5/2 x sqr x

2007-01-09 09:07:05 · 1 answers · asked by Anonymous in Mathematics

2007-01-09 09:07:02 · 4 answers · asked by lincolngomes301 2 in Physics

i need to make some writing that doesnt show up without a black light. what works?

2007-01-09 09:05:53 · 4 answers · asked by Ayame 1 in Other - Science

2007-01-09 09:05:00 · 5 answers · asked by mazza 1 in Mathematics

AND...If u r at work, Will u get in trouble, if caught???

2007-01-09 09:04:07 · 8 answers · asked by Anonymous in Other - Science

2007-01-09 09:03:13 · 6 answers · asked by j j 1 in Biology

1.For more practice with naming ionic compounds complete the chart below.
Cation (+)Ion (-) Chemical Formula Name
NH4+ CO32-
Li+ S2-
Na+ Cl-
Ca2+ PO43-
Ba2+ F-
Ag+ NO3-
Fe2+ Br -
Fe3+ SO42-
Al3+ CO32-
Pb2+ OH-
2.How can you determine if a cation has more than one positive charge? (HINT: take a look at the Periodic Table of Elements)

2007-01-09 09:02:38 · 5 answers · asked by Anonymous in Chemistry

Fruit blossoms are permanently damaged when the temperature drops below about -4 Celcius (a hard freeze). Orchard owners sometime spray a film of water over the blossoms to protect them when a hard freeze is expected. From hte point of view of phase changes, give a resason for the protection?

2007-01-09 09:01:55 · 2 answers · asked by bhangraking777 1 in Physics

is it true that a percentage of tap water is a recyclement of bodily fluids???

2007-01-09 08:59:03 · 12 answers · asked by trout 2 in Chemistry

2007-01-09 08:55:42 · 17 answers · asked by Anonymous in Mathematics

Global warming has aquired a bandwagon effect which attracts movie stars and ex-vice presidents, all of which have no scientific specialty or ability to interpret data. I was curious if anyone has taken the time to truly investigate the data or studies to see if they are flawed.

I have heard that warming has slowed in the last 25 years in comparison to the first 25 years after 1950. I have seen a graph (can't remember where) but it looked like it was curving almost parabolically as if there was an ice age approaching. I have also read an article that talks about how the temperature readings for most studies are conducted near major cities. The growth of these cities in the last 50-75 years can explain the minute temperature increases.

2007-01-09 08:55:20 · 7 answers · asked by n_m_young 4 in Weather