Science & Mathematics - 19 November 2007

the specific heat of ice is 0.48cal/g degree Celsius. how much heat will it take to raise temp. of 10 g of ice frm -30 C to -20 C?

a. 0.48 cal

b. 48 cal

c. 10 cal

d. 4.8 cal

2007-11-19 04:27:28 · 6 answers · asked by Anonymous in Chemistry

Does catalase( the enzyme in the liver and potato which catalyzed the reactions ) change hydrogen peroxide into none-toxic materials ? Explain

2007-11-19 04:21:15 · 1 answers · asked by LIZA 4 in Chemistry

2007-11-19 04:20:08 · 9 answers · asked by Tzone 1 in Physics

If a 1:1 dilution is an mix of equal parts, what is a 1:2 dilution? I always thought you subtracted the volume of the concentrated part from the final total volume. For instance, to make a 1:20 dilution, take one part of the concentrate and add 19 parts of the diluent so you'd have 1 part in a total volume of 20. Or do you add 1 part to 20 making the total volume 21?

2007-11-19 04:18:55 · 1 answers · asked by debodun 2 in Chemistry

2007-11-19 04:17:21 · 1 answers · asked by Anonymous in Engineering

the heat fusion for zinc chloride is 40.4 calories per gram at the melting point of 275 Celsius. How much heat is required to melt 500 g of zinc chloride at its melting point.

a. 11.1 kcal

b. 1.80 cal

c. 12.4 cal

d. 20.2 kcal

could you please explain how you got the answer too.thanks a lot.

2007-11-19 04:17:04 · 4 answers · asked by Anonymous in Chemistry

A. all Hs are equivalent

B. 12

C. 2

D. 6

2007-11-19 04:16:30 · 2 answers · asked by student217 1 in Chemistry

Does the quality of your life decrease? How much does it affect your amune system?

2007-11-19 04:15:58 · 12 answers · asked by Lady Louisa 4 in Biology

This is a set of pictures I saw in a book I read once by Alwyn Scarth. I want to get larger pics of the two images that are in the book for a report, but when I looked at the source he cited in the book, they were not there. The pics are on p. 220-221 of the book Vulcan's Fury.

2007-11-19 04:13:16 · 2 answers · asked by Jeff D 1 in Earth Sciences & Geology

if you have 10.8 meters per second, how do you convert that to radians per second?

i know that it is 2.7 rad/s but i cant figure out how it was done

2007-11-19 04:04:14 · 5 answers · asked by Nick S 2 in Physics

Modern medicine now saves the lives of many people who would have died before coming to child-bearing age. Therefore, people who throughout history would not have procreated are doing so now. Does this weaken (or even spell the end of) the ability of humans to evolve?

2007-11-19 04:04:01 · 5 answers · asked by Anonymous in Biology

2007-11-19 04:03:10 · 1 answers · asked by Anonymous in Physics

Can someone explain to an 11 year old boy what a polar shift is and how we'd die if a polar shift happened?

2007-11-19 03:57:10 · 2 answers · asked by Bongo 2 in Earth Sciences & Geology

If we made a model of the Milky Way that had the diameter of the Earth, how big would the Earth itself be in this shrunken model? (Assume that the Milky Way's diameter is 50 kpc for this problem.)

2007-11-19 03:56:55 · 9 answers · asked by djstylez1987 1 in Astronomy & Space

2007-11-19 03:47:16 · 5 answers · asked by Anonymous in Engineering

It's bloody pissing down with rain, and freezing cold!
Ughh!

2007-11-19 03:47:06 · 3 answers · asked by I ♥ Christmas. 3 in Weather

2007-11-19 03:46:42 · 4 answers · asked by slice014 1 in Engineering

A 8 kg block is pushed by an external force against a spring with spring constant 173 N/m until the spring is compressed by 2.1 m from its uncompressed length (x = 0). The block rests on a horizontal plane that has a coefficient of kinetic friction of 0.56. The acceleration of gravity is 9.8 m/s^2. Remember: The block is not attached to the spring.

After all the external forces are removed (so the compressed spring releases the mass) how far D along the plane will the block move before coming to a stop? Answer in units of m.

2007-11-19 03:45:23 · 2 answers · asked by grouchy187 2 in Physics

i was reading up on time travel and this guy said we have 4 dimensions we have macroscopic control over i was just wondering which ones they were

2007-11-19 03:43:46 · 3 answers · asked by Anonymous in Physics

Could someone please give me a formula to convert mg/l or the E in beer lambert law into a percentage.
Thank you to anyone in advance for answering this question.

2007-11-19 03:36:55 · 3 answers · asked by Richard R 1 in Chemistry

2007-11-19 03:36:11 · 2 answers · asked by symia87 1 in Botany

Here's are some examples:

"What's outside the universe?"
"What happened before the big bang?"
"How many stars are there?"
"Do you believe in aliens?"
"Did we really go to the moon?"

How many others can you think of?

2007-11-19 03:35:12 · 8 answers · asked by elohimself 4 in Astronomy & Space

Has anyone seen comet Holmes? And if recently how does it look? Can you see a tail? It is very cloudy in my area of the country and I can't get a good look at it. I saw it twice when it was basically just a small fuzzy patch of light.

2007-11-19 03:33:08 · 5 answers · asked by Anonymous in Astronomy & Space

The Myth of Dangerous Human-Caused Climate Change


Author/s: R M Carter
Paper ID: 702012
Year of Publication: 2007
Volume Title
Conference Proceedings - New Leaders' 2007


Abstract:

Human-caused global warming has become the environmental cause celebre of the early 21st century. The strong warming alarmist camp currently includes the United Nations, most Western governments, most of the free press, many large corporations (including Enron, before it failed), the major churches, most scientific organisations and a large portion of general public opinion. This phalanx of support notwithstanding there is no scientific consensus as to the danger of human-induced climate change. There is, therefore, a strong conflict between the level of public alarm and its scientific justification. How can this be?

In a democracy, the media serve to convey to the public the facts and hypotheses of climate change as provided by individual scientists, governmental and international research agencies, and NGO and other lobby groups. In general, the media have promulgated an alarmist cause for climate change; they have certainly failed to convey the degree of uncertainty that is characteristic of climate science, or a balanced summary of the many essential facts that are relevant to human causation.

Climate change is as much a geological as it is a meteorological issue. Natural climate changes, both warmings and coolings, are indeed a societal hazard. We usually deal with geological hazards by providing civil defence authorities and the public with accurate, evidence-based, general information about events like earthquakes, volcanic eruptions, tsunamis and floods, and then by adapting to the effects when a damaging event occurs. As for other major natural disasters, the appropriate preparation for extreme climate events is to mitigate and manage the negative effects when they occur, and especially so for dangerous coolings. Attempting instead to ‘stop climate change’ by reducing human carbon dioxide emissions is a costly exercise of utter futility. Rational climate policies must be based on adaptation to dangerous change as and when it occurs, and irrespective of its sign or causation.

The issue now is no longer climate change as such, the reality of which will always be with us. Rather, the issues are, first, the failure of the free press to inform the public about the true facts of human-caused climate change and of the dangers posed by natural climate change. And, second, the vested interests held by many of the groups of warming alarmists. These interests include not only the obvious commercial ones, but also the many scientists and science managers who have discounted or remained silent about the huge uncertainties of the human-caused global warming hypothesis because it suited them to do so. Public opinion will soon demand an explanation as to why experienced editors and hardened investigative journalists, worldwide, have melted before the blowtorch of self-induced guilt, political correctness and special interest expediency that marks the sophisms of global warming alarmists.

2007-11-19 03:30:00 · 8 answers · asked by truthsayer 6 in Weather

I know these 2 questions are stupid but I really stuck here and can not move on...............

2007-11-19 03:28:36 · 1 answers · asked by Anonymous in Medicine

2007-11-19 03:27:43 · 5 answers · asked by hudi 1 in Physics

2m = n - 3
3m = 2n - 9

2007-11-19 03:27:34 · 4 answers · asked by everthesame17 1 in Mathematics

what d you think about this video. have a good look at it, its not made up because when the guys starting running and the date time,, and do you actually believe in aliens??
i dont know is this fake, but i dont think so.
thanks

2007-11-19 03:27:14 · 5 answers · asked by Okano-Irl 5 in Astronomy & Space

2007-11-19 03:23:05 · 2 answers · asked by nathan 2 in Mathematics

1) Is there any proof that indicates that the sizes of objects actually change size as the objects travel at speeds approaching c (the speed of light)?

2) If an object would travel at a speed close to c, then slow to a stop, would the object retain its original size?

Please explain length-contraction, I don't understand it!

2007-11-19 03:21:20 · 5 answers · asked by Michael n 2 in Physics