Science & Mathematics - 30 September 2007

h^8k^3 times 5h

2007-09-30 08:58:41 · 1 answers · asked by Anonymous in Chemistry

2007-09-30 08:58:05 · 1 answers · asked by hog b 6 in Chemistry

My lavendula plant is like brown with no flowers....
what should i do?
ive been watering it once a day.

2007-09-30 08:57:09 · 1 answers · asked by Deanna 3 in Botany

the cost of a lunch of 3 sandwiches, 7 cups of coffee, and 1 donut is $3.15. The cost of a lunch of 4 sandwiches, 10 cups of coffee, and 1 donut was $4.20 at the same cafe. How much will 1 sandwich, 1 cup of coffee, and 1 donut cost?

2007-09-30 08:56:41 · 3 answers · asked by 1234 1 in Mathematics

Roger can paint a room in 6 hrs, Chris can paint the room in 8 hrs. If they begin together and Chris takes a 1 hr break determine the amount of time in hrs and minutes that it will take the room to be painted.

no clue as to how to do the problem

2007-09-30 08:51:41 · 3 answers · asked by Anonymous in Mathematics

2007-09-30 08:51:02 · 2 answers · asked by rmhayden_89 1 in Chemistry

1. Y= sinx+(sin)^2(x) (0,0)

2. Y= sin(sinx) (pie, 0)

2007-09-30 08:49:08 · 1 answers · asked by Kimberly L 1 in Mathematics

how would the properties of density, mass, and volume tend to change with temperature?

2007-09-30 08:48:36 · 3 answers · asked by nate121 1 in Chemistry

2007-09-30 08:43:23 · 1 answers · asked by Asa 1 in Chemistry

A ball thrown vertically upward is caught by the thrower after 4.0 s
1. find the initial velocity of the ball (upwards)
2. find the maximum height it reaches

2007-09-30 08:41:48 · 3 answers · asked by roofchelsea 1 in Physics

2007-09-30 08:39:55 · 7 answers · asked by pickle_411 2 in Biology

2007-09-30 08:39:31 · 7 answers · asked by nutashuh. 1 in Chemistry

A basketball leaves a player's hands at a height of 2.10 m above the floor. The basket is 2.60 m above the floor. The player likes to shoot the ball at a 37.5° angle. If the shot is made from a horizontal distance of 12.50 m and must be accurate to 0.22 m (horizontally), what is the range of initial speeds allowed to make the basket? Enter your answer to at least four significant digits.

lowest initial speed __ m/s
highest initial speed __ m/s

2007-09-30 08:35:04 · 1 answers · asked by Awan 2 in Physics

the equation for the first line is 4y+x=0
the second is y=2x-3
where will these two lines intersect?

i got (1/3,1/3) which im pretty sure is wrong. could someone please show me how to do this

2007-09-30 08:27:36 · 0 answers · asked by Wainwright for Cy Young 3 in Mathematics

I need to know how to solve this problem along with the answer.

2007-09-30 08:20:56 · 2 answers · asked by camille l 1 in Mathematics

A line of 80 squares to have 1/40 shaded. What is the maximum number of ways this can be done. Is there a combination to work this out and if not does someone know the exact answer.
Thanks

Joe

2007-09-30 08:15:17 · 2 answers · asked by Anonymous in Mathematics

i need it for my power of my electronics ok

2007-09-30 08:14:09 · 3 answers · asked by ike e 2 in Engineering

2007-09-30 08:10:50 · 2 answers · asked by jen k 1 in Chemistry

OK I was doing algarithms for A-level further maths, and I want to know how this works (I don't think it has that much to do with algorithms but i may be wrong). Heres a question I had involving it:

A computer takes 1.5 seconds to sort 1000 numbers. If it is a quadratic complexity, how long would it take to sort 100000 numbers?

I think it has something to do with squaring the time whenever the number of numbers, but when I attempted the question I ended up with a huge mess. Please can I have step by step instructions and information on quadratic complexities, what they are used fo etc (anything I might need to know). Thankyou.

2007-09-30 08:09:56 · 2 answers · asked by honourableone 3 in Mathematics

electromagnetic induction ,mutual inductance ,self inductance

2007-09-30 08:08:20 · 1 answers · asked by vijay k 1 in Physics

i heard that ill be able to see mars on oct. 3 on a wensday,is this true or was it last wensday and if it is wat time do i see it and do i need a telescope

2007-09-30 08:06:26 · 8 answers · asked by joanna i 3 in Astronomy & Space

2007-09-30 08:05:49 · 3 answers · asked by JAMES 4 in Engineering

What, when, and why name a volcano apart from all others?
Always enjoy life experiences.

2007-09-30 07:59:56 · 20 answers · asked by Anonymous in Geography

a) carboxylic acids and alcohols
b) carboxylic acids and amines
c) aldehydes and alcohols
d) amines and alcohols

2007-09-30 07:54:26 · 2 answers · asked by Tonnie 1 in Chemistry

Future value. If $50,000 is deposited in a bank account paying 5% compound quarterly, than what will be the value of the account at the end of 18 years? How long will it rake for the investment to double, compound quarterly? How long will it take for the investment to triple, compound continuously?
A=P(1+(r/n))^nt

how do I solve this problem. please show how you got it.
thank you.

2007-09-30 07:53:29 · 3 answers · asked by xyz 1 in Mathematics

What country?

2007-09-30 07:52:36 · 6 answers · asked by Val L 1 in Geography

2007-09-30 07:52:17 · 3 answers · asked by hellokittyishottt 1 in Biology

I had a lab yesterday that involved dumping some copper chloride in water, observing the temp before stirring and stir. then it says add a piece of aluminum that was in a loose ball shape WITHOUT STIRRING. can someone please explain what happens when these things are done? i had lab partners that just dumped everything together and stirred everything the whole time, they finished the lab in about 5 mins with the thermometer out of the beaker half of the time so i don't know what went on and neither did they (not surprisingly)

2007-09-30 07:45:01 · 1 answers · asked by rick 2 in Chemistry

I have a test coming up and I just want to make sure Im clear on something:

Beta particles emit a positive B (positron) and a negative B (similar to the electron in the shells but this one comes from the nucleus) +B decay is proton rich so it turns a proton into a neutron which decreases the atomic number by 1, but the mass remains the same. -B decay is neutron rich so it turns it into a proton thus raising the atomic number by 1, while the mass remains the same. Both are types of isoberic decay and result in the formation of a more stable and different element than that of the parent.

Electron/positron annihalation occurs when an electron and positron collide resulting in 2 gamma rays that travel in opposite direction with 511kev each. this opposite direction is due to the conservation of momentum.

does this seem correct? and should i add anthing else..thanks!:)

2007-09-30 07:42:16 · 2 answers · asked by Kel 1 in Physics

i once read a book that pyramids can stop things from rotting.

2007-09-30 07:41:46 · 2 answers · asked by angel_67 1 in Other - Science