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2006-12-01 10:54:04 · 1 answers · asked by rlhmedispa 1 in Chemistry
One that's always puzzled me... three pins in a plug, the earth, the live and the neutral. The live is the fused one and even sounds like it's going to hurt you, but the neutral one doesn't have a fuse - does that mean you wouldn't get a shock if you touched the neutral wire? Here's the real puzzler - as mains is Alternating Current shouldn't the neutral be just as hazardous as the live?
2006-12-01 10:53:57 · 11 answers · asked by go_on_tell_us 1 in Physics
1. Write three questions you would ask yourself in order to understand the problem below. Consuelos target heartrate is 140 beats per minute. Her normal heart rate is 60 beats per minute. After running for ten minutes, her heart rises by 65 beats. It drops by 32 beats after a 5 minute rest period and then rises by 50 beats after another 15 minute run. Did she reach her target heart rate?
2.Explain whether an equation is a type of formula or a formula is a type of equation
3. Write a problem that uses the formula for the area of a rectangle, A=lw
4.Find any gift box. Measure each side. Use the formula S=2(wh+lh+lw) to fin its surface area, including the lid
Translate the following sentence into an equation, inequality, or formula.
5. The sum of twice x and three times y is equal to 13
6. The perimeter P of a parallelogram is twice the sum of the lengths of two adjacent sides, a and b
7. The quotient of x and y is at least 18 more than five times the sum of x and y.
2006-12-01 10:47:13 · 2 answers · asked by rbd fan 1 in Mathematics
2006-12-01 10:46:52 · 4 answers · asked by Anonymous in Mathematics
How do you convert inches to feet. For eample, 6ft to inches
2006-12-01 10:46:38 · 7 answers · asked by Anonymous in Mathematics
What is the pH of a solution with pOH = 3.75?
a. 3.75
b. 10.25
c. -10.25
d. 1.8X10-4
2006-12-01 10:44:55 · 5 answers · asked by Paul T 1 in Chemistry
NaOH completely dissociates into Na+ and OH- in aqueous solution. If the molar concentration of NaOH is M = 0.025 mol/L, what is the pOH of the solution?
a. 1.6
b. -1.6
c. 3.5
d. 2.0
2006-12-01 10:44:33 · 2 answers · asked by Paul T 1 in Chemistry
If the pH of a solution is 4.5, what is the molar concentration of H+ ions?
a. 3.2X10-5
b. 0.65
c. -0.65
2006-12-01 10:44:09 · 3 answers · asked by Paul T 1 in Chemistry
HCl completely dissociates into H+ and Cl- in aqueous solution. If the molar concentration of HCl is M = 0.01 mol/L, what is the pH of the solution?
a. 0
b. 1
c. 2
d. 3
2006-12-01 10:43:04 · 2 answers · asked by Paul T 1 in Chemistry
2006-12-01 10:41:33 · 3 answers · asked by techie_101 2 in Biology
I Need Alot of help for my statics homewrok
2006-12-01 10:41:13 · 1 answers · asked by Blah 2 in Engineering
Came up in a maths challenge.
You only needed to find four, and they all have to be less than 100.
also i don't know how to do modular arithmetic so a solution without it would be nice. thanks.
2006-12-01 10:39:55 · 3 answers · asked by mongrel73 1 in Mathematics
and see people walk around? If so can anyone give me a link?
2006-12-01 10:39:45 · 8 answers · asked by Anonymous in Other - Science
can you help me with my two problems the second one is.
___,___,___,24,36,42.
thank you this is for my sons homework.
2006-12-01 10:39:21 · 7 answers · asked by sally-jo m 2 in Mathematics
Find an equation of the parabola in standard for with vertex (-3,3), axis of symmetry y=3, and passing through the point (3,-1) Do not need answer, just how to do.
2006-12-01 10:38:09 · 2 answers · asked by Anonymous in Mathematics
2006-12-01 10:34:24 · 17 answers · asked by Kyla 4 in Astronomy & Space
2006-12-01 10:32:57 · 11 answers · asked by Alex 2 in Biology
2006-12-01 10:31:41 · 10 answers · asked by Stephanie B 1 in Weather
A pair of bumper cars in an amusement park ride collide in a perfectly elastic collision as one approaches the other directly from the rear. One has a mass of m1 = 439 kg and the other m2 = 546 kg, owing to differences in passenger mass. The lighter one approaches at v1 = 4.36 m/s and the other is moving at v2 = 3.62 m/s.
What is the velocity of the lighter car after collision, the heavier car after collision, and the change in momentum of both the heavier and lighter car?
How would you determine the solution?
2006-12-01 10:31:18 · 2 answers · asked by gunder53534 2 in Physics
A cylinderical shaped metal rod is used to conduct heat. When the temperature at one end is 100 degree Celsius and at the other end is 20 degree Celsius, heat is transferred at a rate of 16 J/s. The rod is then stretched uniformly to twice its original length. If again it has ends at 100 degree Celsius and 20 degree Celsius, at what rate will heat be transferred between it ends?
The answers that are given to me are:
4 J/s
8 J/s
32 J/s
2 J/s
64 J/s
16 J/s
1 J/s
2006-12-01 10:31:07 · 2 answers · asked by jay s 1 in Physics
2006-12-01 10:30:25 · 6 answers · asked by Laura A 1 in Mathematics
1. Find an equation of the parabola in standard for with vertex (-3,3), axis of symmetry y=3, and passing through the point (3,-1) Do not need answer, just how to do.
2. Graph the parabola y = -(x-2)^2 + 2 Do not need answer, just how to do
3. Graph: x^2 + 4x + y^2 + 6y = 0 Do not need answer, just how to do
4. Find the center, vertices, and foci for the ellipse: x^2 + Y^2 = 1
36 81
Do not need answer, just how to do
5. Obtain an equation for an ellipse with major axis of length 8 and foci at (7,1) and (1,1)
Graph (x-4)^2 + (y-2)^2
9 4 = 1
6. Simplify the equation and graph: -x^2 + 9y^2 – 4x + 18y – 31 = 0
7. Determine the vertices, asymtotes, and foci of the hyperbola defined by
4(y+3)^2
(x+3)^2 - 25 = 1
2006-12-01 10:30:24 · 2 answers · asked by Anonymous in Mathematics
if a city was nuked say 20 miles away would it be safe to go outside? or how long?
2006-12-01 10:30:14 · 8 answers · asked by genius 2 in Other - Science
2006-12-01 10:28:46 · 2 answers · asked by Anonymous in Mathematics
2006-12-01 10:26:14 · 16 answers · asked by Alexandra J 1 in Mathematics
These new fuel cell things.
Water is H2O right? They separate the hydrogen from the oxygen by electrolysis then burn the hydrogen.
Say a car uses 5 litres of water. Is that 5 litres less of the total water on earth?
I thought there was a set amount of water on earth and nothing could change that...
2006-12-01 10:21:19 · 5 answers · asked by Anonymous in Chemistry
2006-12-01 10:20:49 · 15 answers · asked by Kylie E 1 in Zoology
2006-12-01 10:20:26 · 2 answers · asked by Anonymous in Engineering
2006-12-01 10:19:44 · 3 answers · asked by Anonymous in Medicine
An Aerosol spray can with a volume of 250mL contains 2.70g of propane gas (C3H8) as a popellant.?
(a) if the can is at 18degrees C, wt is the pressure in the can? ____atm
(b) What volume would the propane occupy at STP?_____L
(c) The can says that exposure to temperatures above 130 degrees F may cause the can to burst. What is the pressure in the can at this temperature? ______atm
2006-12-01 10:18:45 · 8 answers · asked by lsubetty 2 in Chemistry
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