Science & Mathematics - 31 August 2007

Where is f(x)=cot(x) discontinuous?

2007-08-31 05:39:56 · 2 answers · asked by discovolante 1 in Mathematics

1)There are approximately 250 million passenger vehicles registered in the United States. Assume that the battery in the average vehicle stores 440 watt-hours (Wh) of energy. Estimate (in gigawatt-hours) the total energy stored in US passenger vehicles
2) A hand-held video player displays 320x240 picture elements in each frame of the video. Each pixel requires 2 bytes of memory. Videos are displayed at a rate of 30 frames per second. How many minute of video will fit in a 30 gigabyte memory?

2007-08-31 05:37:40 · 3 answers · asked by Anonymous in Mathematics

As many of you know, there are thousands of people who die each year in the United States while they wait for some good person to donate an organ. The only way for most organs to be donated is when someone dies, and he or his relative has authorized the harvesting of the organ. The single biggest problem is that not enough people sign donor cards. Here's the plan. If a person signs a donor card, and if the person dies (suicide excluded), he is entered into a million dollar lottery conducted each year. There is not just a million dollars given out, but perhaps 20 or 50 million dollars. Therefore, the chances of his beneficiaries getting a million dollar inheritance would be quite high. The money could easily be generated through wealthy benefactors. The organ donor would not benefit financially, but would sign the donor card for altruistic reasons - to help strangers as well as his family. This is a win-win situation that would literally save thousands of lives per year.

2007-08-31 05:36:26 · 2 answers · asked by The Oracle of Omigod 7 in Medicine

2007-08-31 05:33:00 · 2 answers · asked by K-Diz 3 in Astronomy & Space

2007-08-31 05:27:22 · 6 answers · asked by MAEGATAR@!#$% 1 in Earth Sciences & Geology

1. You are given a piece of paper that is 12 inches in length and 6 inches wide. The lower right-hand corner is folded over so as to reach the leftmost edge of the paper. Find the minimum length of the resulting crease.
2. A 40ft ladder is leaning against a 40ft inclined plane with an angle of elevation of 30 degrees with respect to the horizontal. If the foot of the ladder is pulling away the inclined plane at a rate of 5ft/s when the distance of the top of the ladder is 10ft from the top of the inclined plane, how fast is the top of the ladder sliding down the inclined plane?

2007-08-31 05:26:03 · 2 answers · asked by Anonymous in Mathematics

True or False?

The layer of clay enriched in iridium between the sediments of the Mesozoic and Cenozoic eras is indicative of volcanic activity.

If false please correct the statement. Thank you.

2007-08-31 05:19:14 · 6 answers · asked by Anonymous in Biology

Mass=4kg(M), which is immobile and is standing on the equillibrium point,is attached on a spring and it is h=2 m away from the floor.We shoot from the floor another mass m=4 kg to the mass M with a velocity U= 7 m/s.The two masses collide (headon collision) elastically.After the collision the mass m returns to the floor the moment the mass M passes from the equilibrium point for the first time after the collision.

Find:
1.the momentum of the mass M hardly after the collision.
2.the spring constant k
3.the maximum height from the floor of the mass M during the oscillation

2007-08-31 05:18:30 · 1 answers · asked by Joey 1 in Physics

In triangle ABC, tan (angle CAB) = 22/7 and the altitude from A divides BC into segments of length 3 and 17. what is the area of triangle ABC?

2007-08-31 05:17:53 · 2 answers · asked by Anonymous in Mathematics

A company charges a $60 per day plus $0.50 per mile for truck rentals. If mark rents a truck for three days anddrives it a total of 150 miles, what will the company charge?

2007-08-31 05:16:59 · 11 answers · asked by Anonymous in Mathematics

2007-08-31 05:16:28 · 7 answers · asked by janja 2 in Zoology

I will be using excel, for one. But the main problem I have is that I'm not sure how to divide the data. Here is the question, "Make a pie chart for each airline, each representing the percent of flights from each city for that airline." I have a list of five cities, each with two different airlines going to them. I know the total number of flights, the number of one time flights, and the number of delayed flights. Any ideas?

2007-08-31 05:14:37 · 2 answers · asked by Kiko 3 in Mathematics

integration answer is wanted

2007-08-31 05:09:16 · 2 answers · asked by Anonymous in Mathematics

1.A picture on a wall is 2ft high and 1ft above the eye’s observer. At what distance from the wall should the observer position in order to have a maximum subtended angle on the picture?

2.Approximate sin(3.14159) using differentials correct to 5 decimal places.

2007-08-31 05:09:02 · 1 answers · asked by Anonymous in Mathematics

2007-08-31 05:04:19 · 19 answers · asked by puppy 1 in Physics

When human DNA is hybridized with both chimpanzee and orangutan DNA, which hybrid DNA would you expect to have the lowest melting temperature?

a. human - chimp
b. human - orangutan
c. chimp - orangutan
d. human DNA
e. They would all be the same.

My guess is B but I am really not sure. Any input would be helpful.

2007-08-31 04:56:29 · 3 answers · asked by Anonymous in Biology

(x^3-6x-5)=0

2007-08-31 04:53:30 · 6 answers · asked by Jan1ce 1 in Mathematics

Hello I've been reading and watching on TV about space and stuff,and i was wondering what is out side of space?Where is the end of the Universe?Does anyone know or has a clue or something?

2007-08-31 04:48:24 · 9 answers · asked by Anonymous in Astronomy & Space

what tike was required to travel that distance?

2007-08-31 04:46:58 · 7 answers · asked by Azeez A 1 in Mathematics

2007-08-31 04:46:08 · 6 answers · asked by ♥kenz♥ 2 in Astronomy & Space

2007-08-31 04:43:10 · 9 answers · asked by Azeez A 1 in Mathematics

4 log 3 - 3 log 4


I forgot how to do these! Also what buttons do you press on a TI-84 calculator to figure this out? Thanks.

2007-08-31 04:38:30 · 4 answers · asked by footballgrl 3 in Mathematics

can we keep up fighting harm.... everyday i another threat to the human race how long can we do this ...even survive?

2007-08-31 04:34:17 · 11 answers · asked by JAEKOB V 1 in Astronomy & Space

1. (2x^2+5x-1)-(8x-3)
2. X axis is? 3x+2y= -10 and x-4y=6
3. Solve x^2+10=7X

Please help

2007-08-31 04:32:25 · 2 answers · asked by severedangel1776 1 in Mathematics

Why do we die from natural causes, and why do we die from man-made causes?

2007-08-31 04:32:01 · 22 answers · asked by Anonymous in Biology

2007-08-31 04:30:42 · 5 answers · asked by Anonymous in Mathematics

i read russia plans a manned misson to the moon by 2025. why would it take so long if we did it in 1969. i believe the first lunar landing was a hoax , i'm not as sure about the next 5. something is fishy at nasa. only a non thinking person would believe what were told about the moon landings.

2007-08-31 04:25:42 · 4 answers · asked by doc_of_three 2 in Astronomy & Space

i have been told this can only be done with three phase motors .
single phase dont handle it.

2007-08-31 04:21:41 · 8 answers · asked by Anonymous in Engineering

PLEASE GIVE ME THE ANSWER OF THIS QUESTION

2007-08-31 04:14:27 · 6 answers · asked by Puneet W 1 in Earth Sciences & Geology

2007-08-31 04:13:56 · 8 answers · asked by Anonymous in Mathematics