Science & Mathematics - 13 November 2006

How much hear in Joules is required to boil away .5kg of water initially at 50C?

2006-11-13 13:40:20 · 3 answers · asked by lubna h 1 in Physics

When we use the equation e=mc**2 to calculate the energy of an atomic reaction. Let's say if one gram of matter is used up. So the numbers would be:

e= 1 x 3 x 10**8 x 3 x 10**8
= 9 x 10**16 gm meter**2/sec**2

Pardon my ignorance. What is this unit of energy called?

Also how would that convert to the English units.

thanks

rm

2006-11-13 13:40:03 · 3 answers · asked by rm 1 in Physics

Given that an object has an emissivity of .75 and an area of .20m^2 , how much energy does it radiate outward per second at 20C?

2006-11-13 13:39:13 · 1 answers · asked by lubna h 1 in Physics

Also what determines there speed of rotation?

2006-11-13 13:37:24 · 18 answers · asked by Anonymous in Astronomy & Space

i need this for a serious project. I need to know how to sorta "melt" the newspaper in water. You need to put some special material(fluid) in but i dont know what to put it. please help me!

2006-11-13 13:37:14 · 5 answers · asked by Euin C 1 in Other - Science

If the heat required for a process is 250.3J, with a temperature difference of 5C, and the amount of the material is doubled, with the same temperrature difference, what will be the amount of heat transferred? Consider only conduction.

2006-11-13 13:35:34 · 1 answers · asked by First L 1 in Physics

2006-11-13 13:35:13 · 8 answers · asked by Sh0rtii 1 in Mathematics

2006-11-13 13:35:04 · 6 answers · asked by Anonymous in Medicine

Which design is better?

2006-11-13 13:34:39 · 3 answers · asked by Anonymous in Weather

Solve for X and Y ..s
show me the steps. please

2006-11-13 13:33:34 · 7 answers · asked by NoNome 2 in Mathematics

Plz help!!! Need answer quick!!

2006-11-13 13:32:26 · 9 answers · asked by ThisHotty 1 in Geography

if u have any theory etc please tell me i'm interested because i don't know why, i'm just curious but i want to know why, it is fasinating =)

2006-11-13 13:32:16 · 7 answers · asked by Ledzeppelin324 4 in Zoology

2006-11-13 13:32:15 · 3 answers · asked by goodbye say bye 1 in Chemistry

Which of its sides is the hypotenuse? Which side is opposite the 37 degree angle? Which side is opposite the 53 degree angle?

2006-11-13 13:31:34 · 4 answers · asked by theedrunkenclam 1 in Physics

2006-11-13 13:30:16 · 2 answers · asked by hwt_275 1 in Physics

2006-11-13 13:28:02 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Evolution says that all life comes form one single cell at the beginning of creation. That single cell became every type of fish in the ocean and every anamal on the earth. This means even you and me. Is evolution true?

2006-11-13 13:27:54 · 13 answers · asked by Anonymous in Biology

There are specific transports for specific biological compounds and what not. So I was wondering if there were specific protein transport for each specific amino acid, or just one protein transport for all.

2006-11-13 13:26:50 · 2 answers · asked by Anonymous in Biology

help need it for trivia test.

2006-11-13 13:26:04 · 5 answers · asked by z 2 in Physics

How fast would the train have to travel over a distance of another 30 miles, in order to average a speed of 60 MPH for the total distance. clue use your calculator.

2006-11-13 13:23:19 · 6 answers · asked by niddlie diddle 6 in Geography

Volume of a cube?
in my science project i had to find the volume of an ice cube and i measured length x width x height and i got 40.5 cm.does that make sense??? because i turned my project in already and i need to make a presentation tommorow....did i mess up ?


would it make sense if i just added cubic centimeters?

2006-11-13 13:21:39 · 2 answers · asked by sylviacutie06 1 in Physics

Steps.....pleaseee and thank you

2006-11-13 13:21:28 · 13 answers · asked by NoNome 2 in Mathematics

J.P,L's Mars Global probe solar panel motor malfuntion..Default sleep mode. A rotaion in a orbit at a time when panel can catch some solar rays would be the only chance for the probe. This is where a Hydro-Magnetic Energy would be best for these types of Satellites and probes on board systems and propulsion systems would work better.

2006-11-13 13:21:06 · 1 answers · asked by Anonymous in Astronomy & Space

Why isn't Pluto a planet?-- I'm infuriated.

2006-11-13 13:20:06 · 11 answers · asked by Jesus C 1 in Astronomy & Space

Plant and animal cells both undergo Mitosis, a duplicating cell process. However, they both go through the reproduction process differently. Perhaps in one phase of Mitosis, do they react in a different way from each other? How? Name two differences between plant cells and animal cells in how they go through it.

2006-11-13 13:18:32 · 1 answers · asked by Hikaru 1 in Biology

Compare the radius of a positive ion to the radius of its neutral atom.

They dont metion this on my book, i've been looking for 30 min.

Also, compare the radius of a negative ion to the radius of its neutral atom.

2006-11-13 13:18:00 · 5 answers · asked by Ballerina 1 in Physics

2006-11-13 13:17:17 · 3 answers · asked by HoTtIe_WiTh_a_BoDy 2 in Astronomy & Space

2006-11-13 13:16:51 · 7 answers · asked by doc m 1 in Engineering

2006-11-13 13:09:22 · 7 answers · asked by Larson D 1 in Chemistry

2006-11-13 13:07:22 · 4 answers · asked by eastarcher 1 in Astronomy & Space