Science & Mathematics - 17 October 2006

Three salesmen goes to Las Vegas. They arrive at the hotel and each of them has to pay $10 each for the night. Later the manager comes by and says they have a special going on this weekend. He told the receptionist to take $5 and devide it between the three salesmen, they paid too much. The receptionist then goes to give them the $5 and thought "It's too difficult to devide $5 between three, I'm gonna keep $2 and give them each $1 back". If he gives back each salesman $1, hom much did each pay for the night? What is the total of the three all together? Now plus the $2 the receptionist kept? What happened to the other dollar?

2006-10-17 06:54:30 · 2 answers · asked by Moonfairy 2 in Mathematics

What was it like?

2006-10-17 06:53:44 · 4 answers · asked by cucumis_sativus 5 in Zoology

a) Article of the notice of the astrophysical Marcelo Gleiser: It says in the fantastic one that the moon appeared for the breaking above of colliding asteroid with the land. b) Disagreement of the designer and the scientist self-taught Tarcísio Brito: All the physical theory is always provisory in the direction of being only a hypothesis: But the moon and the land, well the all the bodies that with them if interactive in the these mechanics of the universe; it always existed and always it will exist - for all the lives of the cycle of our alternating history the lives of the cycle of daily pag-History. It donates who to finds it, consequently is fact, to the exception of the unconscious ones, or demagogues that they ignore this truth.

2006-10-17 06:53:17 · 2 answers · asked by britotarcisio 6 in Astronomy & Space

Once that dehydration has been ruled out for cause of very dark urine, and if other such indicators for possible kidney, bladder infection do exist (nausea, recurring fever over 2-3 days, lower back and sides ache) is the dark urine also common?

2006-10-17 06:49:08 · 6 answers · asked by Bobbie Joe 2 in Medicine

2006-10-17 06:47:03 · 1 answers · asked by L M 1 in Physics

If you stand on a bathroom scale, the spring inside the scale compresses 0.60mm, and it tells you your weight is 710 N. Now if you jump on the scale from a height of 1.0m, what does the scale read at its peak?

2006-10-17 06:46:54 · 1 answers · asked by Anonymous in Physics

2006-10-17 06:46:23 · 5 answers · asked by connie 1 in Astronomy & Space

A pump is to lift 18.0kg of water per mminute through a height of 3.60m. What output rating (watts) should the pump motor have?

2006-10-17 06:45:36 · 20 answers · asked by Anonymous in Physics

2006-10-17 06:44:33 · 3 answers · asked by Anonymous in Biology

At an accident scene on a level road, investigators measure a car's skid mark to be 88m long. THe accident occurred on a rainy day, and the coefficient of kinetic friction was estimated to be 0.42. Use these data to determine the speed of the car when the driver slammed on (and locked) the breaks. (Why does the car's mass not matter?)

2006-10-17 06:44:24 · 7 answers · asked by Anonymous in Physics

I'm doing a science fair at school, and i need ideas. I'm in seventh grade honors courses, so an 8th grade-level project would be totally perfect. I don't need guidelines or instructions or anything, just the ideas. If anyone has anything like this, I'd love it if you'd share it with me!!!

2006-10-17 06:43:28 · 6 answers · asked by emmy1024 2 in Other - Science

If the KE of an arros is doubled, by what factor has its speed increased?
If its speed is doubled, by what factor does its KE increase?

2006-10-17 06:42:29 · 4 answers · asked by Anonymous in Physics

Can you tell me which is better: a refractor telescope or a reflector telescope and why? It would be a first telescope for an eight year old child.

2006-10-17 06:41:45 · 13 answers · asked by krisaquarius 4 in Astronomy & Space

2006-10-17 06:40:38 · 10 answers · asked by Cute B 1 in Mathematics

Suppose that X is an uncountable set and d is any metric on X
which produces the discrete topology.
(such a metric d does not have to be a constant multiple of the discrete unit metric!)
Show that for some e>0 there is an uncountable subset A of X
such that d(x,y)>=e for all x,y in A.

2006-10-17 06:38:07 · 1 answers · asked by KYP 1 in Mathematics

i need tough question on maths
as i m preparing for iit
is there any good and useful site on net related to this.

2006-10-17 06:36:10 · 8 answers · asked by NITISH K 2 in Mathematics

Check my answer, also check sig figs.

Determine the mass of sodium carbonate decahydrate necessary to make 500.00 mL of a solution with a pH = 11.50.

first we change pH to [H+] 10^-11.50= 3.16x10^-12 this is the molarity to get the mols we multiply this by the volume in liters so,

3.16x10^-12 x .500L = 1.58x10^-12 mol

now to get the pass we take the mol and multiply by the molar mass. the formula is Na2CO3 * 10H20

Im not sure if you add the 10H20 but I did, can anyone tell me?

1.58x10^-12 * 285 = 4.52 x 10^-10g is the mass

2006-10-17 06:35:29 · 2 answers · asked by farxfromxlonelyx 1 in Chemistry

a) Article of the notice of the astrophysical Marcelo Gleiser: It says in the fantastic one that the moon appeared for the breaking above of colliding asteroid with the land. b) Disagreement of the designer and the scientist self-taught Tarcísio Brito: All the physical theory is always provisory in the direction of being only a hypothesis: But the moon and the land, well the all the bodies that with them if interactive in the these mechanics of the universe; it always existed and always it will exist - for all the lives of the cycle of our alternating history the lives of the cycle of daily pag-History. It donates who to finds it, consequently is fact, to the exception of the unconscious ones, or demagogues that they ignore this truth.

2006-10-17 06:35:26 · 3 answers · asked by britotarcisio 6 in Astronomy & Space

2006-10-17 06:34:32 · 8 answers · asked by Anonymous in Mathematics

Going out laughing sounds like the way to go!

2006-10-17 06:33:01 · 14 answers · asked by Anonymous in Biology

2006-10-17 06:30:37 · 2 answers · asked by pankaj s 3 in Engineering

"In the cytoplasm the typical (ATP)/(ADP)(P) ratio is 5.53 x 10 squared. Calculate the delta G (free energy change) required to synthesise ATP in the cytoplasm". My problem is that I dont see how 5.53x 10squared is a ratio. Once I understand that I may e able to finish my assignment. I asked my tutor but he didnt explain it any clearer. HELP!!!

2006-10-17 06:30:07 · 22 answers · asked by sparkyy2k2001 2 in Mathematics

2006-10-17 06:27:24 · 2 answers · asked by vls 1 in Engineering

2006-10-17 06:26:43 · 5 answers · asked by mustang.pass 2 in Mathematics

2006-10-17 06:26:32 · 1 answers · asked by rajjoshua 1 in Weather

A ramp leading to a building has an incline of 4.5°. The length of the ramp is 50 m. How high is the ramp and what is the horizontal length?


and if you can also help with this one as well
b)Solve the following triangle, given ÐX = 90°, y = 2.5 cm and z = 8.3 cm

2006-10-17 06:23:44 · 5 answers · asked by Anonymous in Mathematics

2006-10-17 06:19:44 · 6 answers · asked by Rawkus 3 in Astronomy & Space

and how we can separate iron filingsfrom sand. experimental or physically or chemically.

2006-10-17 06:11:44 · 14 answers · asked by NOTHEMBA M 1 in Chemistry

If light is having birth then it is dying also. What is the time gap
between its birth and re-birth.

2006-10-17 06:08:27 · 13 answers · asked by Anonymous in Astronomy & Space

Soon all lighting house and street will be by LEDs which is much more controlable. My idea is the light unit has a sensor so the light is only on if the room is occupied or a person or car is in that section of the road. Not only are LEDs more effective but this plan would save a great deal of energy

2006-10-17 06:03:44 · 15 answers · asked by bwadsp 5 in Engineering