Science & Mathematics - 30 November 2007

1. sqrt.[5x-6]=2
2. 3+sqrt[x+7]=sqrt[x+4]
3. 3+sqrt[x]=sqrt[x-3]
4. sqrt[x-5]-sqrt[x-3]=4
5. sqrt[x+2]=sqrt[4-x]
6. sqrt[x+2]-sqrt[6x]=-1
7. 2x=sqrt[12x-5]
8. 2+sqrt[x]=sqrt[x+4]

2007-11-30 05:15:32 · 1 answers · asked by brock.young 1 in Mathematics

2007-11-30 05:15:17 · 4 answers · asked by bouncing_soul_geuse 2 in Physics

This question has been posted in the Polls section but I want to see if the answers here would be more informative.

2007-11-30 05:15:12 · 11 answers · asked by ItsMeTrev 4 in Astronomy & Space

2007-11-30 05:15:04 · 10 answers · asked by Anonymous in Paranormal Phenomena

O3, O2, CO, CO2, or H2O

2007-11-30 05:12:24 · 3 answers · asked by JoJo 2 in Chemistry

2007-11-30 05:11:39 · 9 answers · asked by nhutnguyen373@yahoo.com 1 in Weather

The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees C is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees C.

2007-11-30 05:07:05 · 3 answers · asked by Anonymous in Chemistry

What molecule is the worst greenhouse gas considering its total impact on the atmoshphere? Please help!!!

2007-11-30 05:00:40 · 7 answers · asked by deebee 2 in Chemistry

s'' - 36s = 0
Give the solution in terms of the variable t. List the smaller root first
C1 = ?
C2 = ?

2007-11-30 04:59:24 · 4 answers · asked by simonkf2002 1 in Mathematics

The specific heat of copper metal is 0.385 J/g·K. How many joules of heat are necessary to raise the temperature of a 1.41 kg block of copper from 27.2°C to 85.2°C?

2007-11-30 04:58:22 · 2 answers · asked by JTOWN 2 in Chemistry

2007-11-30 04:56:59 · 6 answers · asked by ? 1 in Mathematics

A fair coin is tossed 11 times. What is the probability that the coin lands head at least 9 times?

a) 0.0322

b) 0.0654

c) 0.0317

d) 0.0327

e) 0.0269

2007-11-30 04:48:55 · 1 answers · asked by Bella 2 in Mathematics

The four tires of an automobile are inflated to a gauge pressure of 218000 Pa. Each tire has an area of 0.0297 m^2 in contact with the ground.
A. Determine the weight of the automobile. Answer in units of N.

2007-11-30 04:48:06 · 4 answers · asked by Anonymous in Physics

An engine works at 26% efficiency. The engine raises a 5-kg crate from rest to a vertical height of 8 m, at which point the crate has a speed of 4 m/s. How much heat input is required for this engine?

2007-11-30 04:47:31 · 3 answers · asked by Anonymous in Physics

A proton moves with a velocity of v = (2i - 4j + k)m/s in a region in which the magnetic field is B = (i + 2j - 3k)T. What is the magnitude of the magnetic force this particle experiences?

2007-11-30 04:46:57 · 3 answers · asked by andrew w 1 in Physics

In a 47 s interval, 569 hailstones strike a glass window of area 0.624 m^2 at an angle 20 degrees to the window surface. Each hailstone has a mass 3 g and a speed 10.8 m/s.
A. If the collisions are elastic, find the average force on the window. Answer in units of N.
B. Find the pressure on the window. Answer in units of N/m^2.

2007-11-30 04:42:13 · 3 answers · asked by Anonymous in Physics

A 25kg child on a 2.0 m long swing is released from rest when the swing supports make an angle of 30.0 degrees with the vertical.

A) What is the maximum potential energy associated with the child?

B) Disregarding friction, find the child's speed at the lowest position.

C) What is the child's total mechanical engery?

D) If the speed of the child at the lowest position is 2.00 m/s, what is the change in mechanical energy due to friction?

*I would like to see how it is worked and what equations are used. Thanks

2007-11-30 04:42:03 · 1 answers · asked by Cambri 1 in Physics

2007-11-30 04:38:18 · 19 answers · asked by k-monster 1 in Physics

2007-11-30 04:32:31 · 7 answers · asked by Anonymous in Medicine

2007-11-30 04:30:00 · 1 answers · asked by bajju 1 in Botany

In other words, if the Earth's speed of rotation were to slow, would the effects of gravity increase, or does the centrifugal (or centripetal) force caused by the Earth's rotation have no effect on gravity?

2007-11-30 04:27:09 · 6 answers · asked by Andrew M 3 in Astronomy & Space

A wind with speed 45 m/s blows across a roof 20 m long and 12 m wide. The pressure inside the room is 1 atm. What is the net force on this roof due to the pressure difference inside and outside the roof? (The density of air is equal to 1.3 kg/m^3)

2007-11-30 04:24:57 · 1 answers · asked by emuhlee15 2 in Physics

y= what

2007-11-30 04:21:19 · 25 answers · asked by joshua l 1 in Mathematics

y= what

2007-11-30 04:19:53 · 10 answers · asked by joshua l 1 in Mathematics

A movie theater sells tickets for 8.00 each with Seniors receiving a discount of 3.00. One evening the theater sold 605 tickets and took in 3748 in revenue. How many of each type of tickets were sold?

Can't figure that one out.

2007-11-30 04:11:06 · 10 answers · asked by wrongnumber 1 in Mathematics

I created these riddles myself ..so no point Googling for these - big brain power needed here boyz... the first one is a warm up, the second one should prove tougher and the third the toughest yet. (I would post this in the Riddle section, but it seems the minds are over here)

Number 4 is fun for the kiddies - pretty simple

1. What number completes this sequence? Explain? ( 7, 7, 3, 4 )

2. is GOD a BAD IDEA ?

3. If all Plonks are Bewares are all Bewares Heeded? Explain

Fun for the kiddies:
4. What number comes next in the sequence? Explain ( 31, 91, XI, II, 21, III)

2007-11-30 04:09:27 · 3 answers · asked by CubeScience 3 in Mathematics

2007-11-30 04:06:57 · 5 answers · asked by Elijah W 1 in Physics

x+1/3-1/2=3x-3/6

i got this answer
x=4/2=2/1=2

is it right?

2007-11-30 04:02:07 · 11 answers · asked by ihurtmyhand 4 in Mathematics

2007-11-30 04:00:46 · 7 answers · asked by Anonymous in Weather

1st and 2nd are width and height, the 3rd is depth and 4th is time. What is the 5th dimension?

I'll come back and give 10 points to the clearest answer.

2007-11-30 03:52:32 · 6 answers · asked by jack 6 in Physics