Science & Mathematics - 5 October 2007

1)What is the acceleration of a car that goes from rest to 71 mi/hr in 12.0 seconds?

2) At Cedar Point, you can win a prize if you predict your throwing speed. Tony decides to get an advantage and measure his throwing speed beforehand. He throws a baseball straight up as hard as he can and it comes back down to him 6.5 seconds later. At what velocity did he throw it upward?



Please solve and explan how you solved.
Thank you

2007-10-05 09:15:19 · 2 answers · asked by Anonymous in Physics

I am trying to decide which microswitches I can use on my electronic circuit and have noticed a value in the component catalogs for 'maximum current' how do I work out if ttey are compatable with my circuit. For example if I want to use a relay with a maximum current of 2A how do I work out if this fits within the current rating of my circuit -- I assume I need to work out the current/ampage of the circuit?? Thanks in advance

2007-10-05 09:12:10 · 8 answers · asked by fnordcorps 1 in Engineering

usually they say it on the weather channel in the morning but i missed it, so im just wondering.

this is for mississauga/toronto...ontario..canada.

2007-10-05 09:08:42 · 5 answers · asked by Anonymous in Weather

Like when he is floating in outer space beside the spaceship, and then he really needs to. Is the fart gonna float around in that little space so he can bask in his own glory, or does it get separated from the air he breaths in somehow?

2007-10-05 09:06:32 · 7 answers · asked by amateurgrower 3 in Astronomy & Space

If 26.24 mL of a standard 0.1650 M NaOH solution is required to neutralize 33.03 mL of H2SO4, what is the molarity of the acid solution?

Please explain your answer step by step. Thanks!

2007-10-05 09:01:55 · 3 answers · asked by Charleen 4 in Chemistry

Jose has savings accounts for each of his five children. They contain $215, $156, $318, $75, and $25. Find the median and the mean amount of money per account.

2007-10-05 08:57:30 · 5 answers · asked by Anonymous in Mathematics

Solve for x and then check your answers? Will someone help me out with this?

1.) -3x = 27


2.) 3/7x = 15

(Second problem is a fraction 3/7 with x right behind it)

2007-10-05 08:55:29 · 8 answers · asked by Anonymous in Mathematics

suppose that the sum of the squares of two complex numbers x and y is 7 and the sum of their cubes is 10. What is the largest real value that x+y can have?

thx.

2007-10-05 08:54:07 · 1 answers · asked by Meow* 2 in Mathematics

2007-10-05 08:54:06 · 11 answers · asked by Anonymous in Medicine

2007-10-05 08:53:14 · 8 answers · asked by Silence, I kill you 2 in Astronomy & Space

From this article today: http://news.yahoo.com/s/ap/20071005/ap_on_re_us/odd_shared_birthday

A couple in Ohio gave birth to their third child, each born on Oct. 2. The odds of a family having three children born on the same date in different years are about 7.5 in 1 million, said Bill Notz, a statistics professor at Ohio State University.

I don't understand why the answer wouldn't be (1/365) to the third power, or 1 in 48,627,125?

2007-10-05 08:52:53 · 4 answers · asked by Wheels 4 in Mathematics

Find the quotient:

(14y+8y^2+y^3+12) / (6+y)

Thanks for the help!

2007-10-05 08:51:25 · 6 answers · asked by John 1 in Mathematics

if it looks blue under tanning lights and none of the others do?

2007-10-05 08:49:06 · 13 answers · asked by valerino539 4 in Earth Sciences & Geology

There is an owl outside my window every night. I have finally decided to take it out tonight. I think that I would like to eat it.

2007-10-05 08:44:44 · 6 answers · asked by Anonymous in Zoology

a. long chain fatty acid
b. micelle
c. short chain alcohol
d. long chain ester

2007-10-05 08:43:13 · 2 answers · asked by Anonymous in Chemistry

A) protons.
B) neutrons.
C) electrons.
D) isotopes.

2007-10-05 08:40:21 · 5 answers · asked by mary h 1 in Biology

A 4.10 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 37.0 N. Figure 6-26 gives the block's speed v versus time t as the block moves along an x axis on the floor. What is the coefficient of kinetic friction between the block and the floor?

for the table
the speed is 5m/s.

2007-10-05 08:38:59 · 2 answers · asked by Anonymous in Physics

The roots of maple suck in water from underground, and pump it into the trunk. If we cut the bark, we can collect the syrup at significatly higher level of altitude. Does not it violate conservation of energy, and if not, what is the mechanism behind this phenomenum?

2007-10-05 08:38:46 · 3 answers · asked by Alexander 6 in Physics

i need a link for an article or somethingg about the Fundamental Theorem of Algebra in an easy way!! and please explain what it is because i do not understand it AT ALL!!

2007-10-05 08:37:55 · 2 answers · asked by ? 1 in Mathematics

2 9 5 13 10 19 17?

2007-10-05 08:36:26 · 7 answers · asked by yvonnah 2 in Mathematics

How much energy is released or consumed if 16.0g N2O5 of is completely decomposed as described?

Equation: 2N2O5 -> 4NO2 + O2

So this is what I have so far..

13.3kj/mol = N2O5
33.2kj/mol = NO3
0 kj/mol = O2

Then total h = 4(33.2kj/mol) - 2(13.3kj/mol) = 39.8kj/mol

What do I do now?

2007-10-05 08:33:36 · 1 answers · asked by Anonymous in Chemistry

a) H--H
b) O--Cl
c) Ca--F
d) Ca--O
e) Cl--F

2007-10-05 08:33:35 · 4 answers · asked by Got a quick Question.... 2 in Chemistry

please hurry

2007-10-05 08:29:05 · 3 answers · asked by ilovedstny 1 in Mathematics

[H-C=N-H] +
(there are two dots on the top of the N!)


a) For this Lewis structure the number of valence electrons shown is correct
b) All of the atoms have an octet of electrons
c) In this Lewis structure the formal positive charge is on the carbon atom
d) This is the best Lewis structure for the molecule [HCNH]+

2007-10-05 08:28:05 · 2 answers · asked by Anonymous in Chemistry

The explosion of the Hindenberg was a quirk... it happened because at that point in the pre-war, the US cut off the supply of helium to the rest of the world. The germans switched hydrogen... this led to inevitable disaster.

However, the dirigible technology was very promising; the ability to move large loads of freight and passengers over land and sea, without need for roads, bridges and other terrain infrastructure, was a great idea; brilliant actually.

Trucks and trains require extensive infrastructural upkeep... and a look around at that infrastructure shows it has been impossible to sustain. Also the roads and rails chew up the landscape.

Modern engineering could make dirigibles of great load bearing effectiveness, that would use far less fuel than trucks
and not require the massive upkeep of railroads...
It's a real answer to a lot of our problems.

Why not look that way again? It would be a greener solution than the contining expansion of highways and rail.

2007-10-05 08:26:11 · 8 answers · asked by Anonymous in Engineering

If it were possible to drill a hole big enough for a small man, maybe gary coleman, to go through, what do you think would happen?

2007-10-05 08:25:51 · 5 answers · asked by Anonymous in Physics

1. 12 - 6x = 18 - 7x

2. x + 3/4 = -9/2

3. 8 ( y + 3 ) =3(2y + 12)

4. x/2 + 2x/3 + 3 = x+3

5. x-2/3 - 4 = x +1/4

2007-10-05 08:24:18 · 6 answers · asked by Anonymous in Mathematics

Is there a relationship between pressure and temperature(direct or inverse) of a canned liquid at its freezing point or even after(given that it is exposed only to ambient conditions after freezing). Would there be any equation (or approximation) like the gas law pv=rt for a canned liquid relating pressure and temperature

2007-10-05 08:23:51 · 5 answers · asked by pavan s 1 in Engineering

is 2 right?

2007-10-05 08:23:13 · 8 answers · asked by Terri L 2 in Biology

2007-10-05 08:22:58 · 2 answers · asked by Anonymous in Mathematics