Science & Mathematics - 8 November 2007

(ln(x+1))^(cosx)

ln(x^2+y^2)

x^y=y^x

2007-11-08 13:27:12 · 1 answers · asked by Lauren A 2 in Mathematics

2007-11-08 13:24:11 · 4 answers · asked by Tland 3 in Astronomy & Space

How many grams of steam at 100 deg. C would be required to raise the temperature of 43.6 g solid benzene (C6H6) from 5.5 deg. C to 30.0 deg. C?
Hfus for benzene: 9.87 kj/mol
specific heat for benzene: 1.63 J/g x deg
Hvap for steam at 100 deg. C: 40.7 kj/mol

Could you explain how I would go about solving this?
Thanks!

2007-11-08 13:23:52 · 1 answers · asked by Anonymous in Chemistry

If so, how does their activities differ during sleep and during the time they are "awake"?

2007-11-08 13:21:47 · 1 answers · asked by Johnny Ben 1 in Biology

2007-11-08 13:17:53 · 3 answers · asked by jordanx1977 2 in Weather

2007-11-08 13:17:14 · 3 answers · asked by Anonymous in Zoology

2007-11-08 13:16:05 · 3 answers · asked by Robert R 2 in Physics

I'm trying to find out how much 1 atom of gold is worth at todays market price.

2007-11-08 13:15:31 · 3 answers · asked by ital_leprikon 1 in Chemistry

2007-11-08 13:14:55 · 3 answers · asked by Cooley 1 in Chemistry

I have a chapter test tomorrow and I cannot understand how to find the maxinum profit using linear programming. Here's a similar question to the one on the test. It's not homework. Please help. Thanks.

A lunch stand makes $.75 profit on each chef's salad and a $1.20 on each Caesar salad. On a typical weekday, it sells betwween 40 to 60 chef's salads and between 35 and 50 Caeser salads. The total number has never exceeded 100 salads. How many of each type should be prepared in order to maximize profit?

2007-11-08 13:14:43 · 1 answers · asked by ♫MizzUnderstood♫ 3 in Mathematics

Can you help me with this: Solve the differential eq:

2(dy/dx) - 4xy = 5x ; (y=10 when x=1)

This is what i have so far:

dy/dx - 2xy = 5/2x

so, e^(-x^2)(dy/dx) - 2xye^(-x^2) = 5/2xe^(-x^2)

Dx (e^(-x^2)y) = 5/2xe^(-x^2)

I'm stuck. I know the next step involves substitution but I don't know how to proceed.

2007-11-08 13:13:55 · 4 answers · asked by Anonymous in Mathematics

2007-11-08 13:13:36 · 1 answers · asked by doggypup_catluvr 2 in Biology

How do viruses and eukaryotes relate?

please provide sources.

2007-11-08 13:12:52 · 1 answers · asked by Anonymous in Biology

2007-11-08 13:10:02 · 2 answers · asked by Anonymous in Chemistry

-2
_____
√a^3

Is what in simpliest form. I got this can you check if this is correct:

-2
___
a^2

IF not explain the steps you used. Thanks

2007-11-08 13:07:41 · 3 answers · asked by Grid 7 in Mathematics

Please explain, im confused. Thanks

2007-11-08 13:07:16 · 2 answers · asked by Anonymous in Chemistry

It's almost like keeping a suspect in custody despite all the evidence being disputed repeatedly. How does one search for a complete theory?

2007-11-08 13:05:48 · 10 answers · asked by Dreamer 1 in Astronomy & Space

It is said that Galileo discovered a basic principle of the pendulum-that the period is independent of the amplitude-by using his pulse to time the period of swinging lamps in the cathedral as they swayed in the breeze. Suppose that one oscillation of a swinging lamp takes 5.5 s. How long is the lamp chain? What maximum speed does the lamp have if its maximum angle from vertical is 3.0 degrees?

2007-11-08 13:03:57 · 1 answers · asked by rochesmk 2 in Physics

use pascal's triangle

2007-11-08 13:01:58 · 2 answers · asked by Anonymous in Mathematics

2007-11-08 13:01:22 · 3 answers · asked by briceboo@verizon.net 1 in Biology

the middle pearl is the largest and most expensive of all. Starting from one end, each pearl is worth $100 more than the one before, up to the middle. From the other end, each pearl is worth $150 more than the one before, up to the middle.What is the value of the middle pearl?

2007-11-08 12:57:16 · 3 answers · asked by tables 2 in Other - Science

I need to know ASAP because I'm writing a paper on it.

2007-11-08 12:56:39 · 1 answers · asked by ... 2 in Biology

is refusing to give me medicine for nausea because i wont go to her surgery for a blood test what can i do? can i buy meds online without prescription?

2007-11-08 12:54:58 · 8 answers · asked by Anonymous in Medicine

Can someone give me 3 thing Lithium is used for.

2007-11-08 12:54:33 · 5 answers · asked by JerBear 3 in Engineering

Can someone give me 3 thing Lithium is used for.

2007-11-08 12:54:18 · 2 answers · asked by JerBear 3 in Engineering

plz!

2007-11-08 12:52:02 · 1 answers · asked by Anonymous in Biology

What is the difference between the two?

What are these [listed below], covalent or ionic bonds?

Oxygen-
Nitrogen-
Carbon-
Sulfur-
Phosphorus-
Chlorine-
Potassium-
Calcium-

I really need help with this, it is extremely confusing for me. Please and thank you. I truly do appreciate it.

2007-11-08 12:51:21 · 4 answers · asked by michaela. 2 in Biology

1.80g of water contains how many moles of hydrogens?

2007-11-08 12:51:10 · 2 answers · asked by Mio 2 in Chemistry

41. A sample of gas is collected over water at a temperature of 35.0 degrees C. When the barometric pressure reading is 742.0 torr. What is the partial pressure of the dry gas?

2007-11-08 12:48:24 · 2 answers · asked by loveme 1 in Chemistry

in many animals, glucose, rather than starch, is transported by the blood through the body to all the cells. Starches in many foods are digested to yield glucose. explain why the digestion of starch to glucose is necessary.

2007-11-08 12:47:45 · 7 answers · asked by Anonymous in Biology