Science & Mathematics - 19 November 2007

Y=-2(3^[6-x])+16 whats the domain?
and range and what is the answer for the x int in a decimal

2007-11-19 15:04:47 · 1 answers · asked by Anonymous in Mathematics

what unit is used to measure the mass of an atom?

2007-11-19 15:04:12 · 7 answers · asked by Anonymous in Physics

2007-11-19 15:02:42 · 2 answers · asked by binu 1 in Engineering

Where andhow do I buy a star?

2007-11-19 15:01:18 · 7 answers · asked by markjaradeh1 2 in Astronomy & Space

A rectangular fish pond is 7ft longer than it is wide. A wooden walk is 1ft wide and is placed around the pond. The area covered by the pond and the walk is 58ft (squared) greater than the area covered by the pond alone. What are the dimensions of the pond?

2007-11-19 14:57:59 · 2 answers · asked by daniella26 2 in Mathematics

distance b/w two front supports is 1.m (distance while still on surface).

2007-11-19 14:56:56 · 2 answers · asked by oiuyt 1 in Engineering

Please explain the formulas so I will be able to understand.

4) Ann Tick runs up the "down" escalator in 12 seconds and back down again in 8 seconds. The escalator is 48 feet long. How fast does Ann run? How fast does the escalator move?

6) Deep Though Granola is 25% nuts and dried fruit. Oat Dream Granola is 10% nuts and dried fruit. How much of Deep Though ands how much of Oat Dream should be mixed to form a 20 LB batch of franola that is 19% nuts and dried fruit?

7)Etch Clean Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each should be mixed to get a 10L of solution that is 40% acid?

8) Lomasi's two student loans totaled $12,000. One of her loans was at 6% simple interest and the other at 9%. After one year, Lomasi owed $855 in interest. What was the amount of each loan?

9) The rectanglular ground floor of the John hancock building has a perimiter of 860 ft. The length is 100 ft more than the width. Find the length and w

2007-11-19 14:56:51 · 2 answers · asked by iMarty 4 in Mathematics

So, I'm doing a science paper for class on comets, and I'm stuck,im not sure what to look up, so Ill just ask here, about the answer, How far do comets travel into space, and where do they travel? I know it varies, but im not quite sure what Im looking for.

2007-11-19 14:55:57 · 2 answers · asked by kaiiiiit<3 2 in Astronomy & Space

Please?!

2007-11-19 14:54:32 · 1 answers · asked by Ge Y 2 in Physics

Could you please explain how to do this problem?

Find the tangent to the curve y=4+cotx-2cscx
at the point (pi/2,2)
thankyou

2007-11-19 14:52:37 · 2 answers · asked by jkl;;khg 3 in Mathematics

2007-11-19 14:50:52 · 1 answers · asked by Dung N 1 in Biology

2007-11-19 14:49:39 · 1 answers · asked by Anonymous in Other - Science

A pitcher throws a curveball that reaches the catcher in 0.49 s. The ball curves because it is spinning at an average angular velocity of 360 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in radians) as it travels from the pitcher to the catcher?

2007-11-19 14:48:15 · 1 answers · asked by Anonymous in Physics

the distance, mass, and initial & final velocities are given!

2007-11-19 14:44:36 · 5 answers · asked by tj.spiffy 1 in Physics

A hiker, who weighs 1180 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3840 N, and rests on two concrete supports, one at each end. He stops one-fifth of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge at each end?

2007-11-19 14:43:51 · 1 answers · asked by Anonymous in Physics

2007-11-19 14:42:27 · 1 answers · asked by Kaley 2 in Physics

does anybody know a website that i could go to for a science project??

2007-11-19 14:36:56 · 2 answers · asked by VAl 1 in Engineering

2007-11-19 14:34:57 · 3 answers · asked by Delicia S 1 in Engineering

I got 2, but the book says 0. Can anyone help?

2007-11-19 14:31:30 · 6 answers · asked by Anonymous in Mathematics

2007-11-19 14:30:46 · 6 answers · asked by *click* 3 in Physics

How can a Bumble Bee fly if it defies all known scientific laws?

This is one that even graduates of MIT cannot answer!

2007-11-19 14:29:45 · 3 answers · asked by E. Paul S 3 in Physics

and range and what is the answer for the x int in a decimal

2007-11-19 14:28:37 · 2 answers · asked by Anonymous in Mathematics

Can't find the answer in the book or my notes. =[

2007-11-19 14:27:49 · 2 answers · asked by Anon E. Mous A 1 in Chemistry

can you give me an example of why studying kinetics is important in life??

for example, studying how a certain chemical reaction is effected by temperature, concentration and determining rate reaction and such, you can decrease chances of explosion in a lab.

I want a better example than this, hehe

thanks!!

2007-11-19 14:27:28 · 1 answers · asked by Anonymous in Chemistry

I was wondering if there is Lipids in DNA or Chromosones. Human, instinct species or not, is there lipids in DNA or Chromosones?

If you could provide your source that would be graciously apreciated!

2007-11-19 14:26:12 · 6 answers · asked by Anonymous in Biology

added to 135 mL of a 1.00 M potassium sulphate solution. The total heat capacity of the calorimeter including all the contents was 1.75 kJ oC-1. The temperature in the calorimeter rose from 24.50oC to 28.70 oC.

Calculate the enthalpy change, in kJ, for the reaction:
Me2+ (aq) + SO42- (aq) = MeSO4 (s).
Me is the alkaline earth metal in question.

2007-11-19 14:25:29 · 1 answers · asked by Anonymous in Chemistry

i have to answer that why is the lysosome important?

2007-11-19 14:25:28 · 9 answers · asked by = ) 4 in Biology

2007-11-19 14:25:28 · 4 answers · asked by ♥♫_jasmine_♫♥ 2 in Biology

my assignment is to make different equations and plot them so that they form some sort of picture using different functions such as absolute value function, peicewise function... please help i have no idea what i am doing!!

2007-11-19 14:25:15 · 2 answers · asked by help91 1 in Mathematics

What considerations are required such as
-weight of the vehicle
-direct drive vs pulleys or gears
-anticipated maximum speed
-vehicle shape
-wheels/tyres
-expected terrain
etc etc etc

Is there a mathematical formula that I can use to calculate what motor is required for eg. 2kg or 10 kg or 100kg vehicle to travel at various speeds, and how can I calculate the effect of other factors of the vehicle. How much extra power is required if some form of alternator/generator is added?

2007-11-19 14:23:29 · 1 answers · asked by goodinthecrib 2 in Physics