Number of results: 801
What was the scientific methodlogy Mendel used to go his experiments. Why is it imprant to have carefully thought out procedures when conducting experiments? please read the following page (yes Mendel is in the article): (Broken Link Removed) how molten metal changes into a ...
Sunday, June 18, 2006 at 3:22pm by Anonymous
ionic or covalent
can you check for me? Calcium Chloride: covalent Citric Acid: ionic Phenyl Salicylate: covalent Potassium Iodide: ionic Sodium Chloride: covalent Sucrose: ionic Thanks so much!!!! You must have some reason for picking ionic or covalent. How did you arrive at your answers? Look...
Monday, June 19, 2006 at 1:26pm by Hodgkin
Furthur to my recent question and thank you Bob. Had the 32 feet being 33 feet I would have considered this close enough to 10m. However I now understand there are many answers to the question of the decrease in barometric pressure with height all probably correct. Taking the ...
Tuesday, August 29, 2006 at 10:49am by mike
A SALT IS OBTAINED AS A REACTION BETWEEN A SALT (and water) IS OBTAINED AS A REACTION BETWEEN a base and an acid. See: http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/acidbase.html http://lrs.ed.uiuc.edu/students/erlinger/water/background/ph.html I hope this helps. Thanks ...
Saturday, September 30, 2006 at 12:29pm by CAROLINE
Find the kinetic energy of a particle with a mass of one gram moving with half the speed of light. Compare the answer with the one you would find using the nonrelativistic formula. Ans in units of x 10^13. http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/releng.html
Thursday, October 12, 2006 at 6:54pm by slien
I am in middle school and we are doing a catapult projectile lab. The question is, using knowledge of force, motion and projectiles, can a catapult be built to accurately project a marshmellow toward a designated target. We have to change the angle of release and measure ...
Sunday, October 22, 2006 at 8:39pm by Wendi
During space flight, astronauts often refer to forces as multiples of the force of gravity on Earth's surface. What does a force of 5g mean to an astronaut? If Earth were twice as massive but remained the same size, what would happen to the value of g? http://hyperphysics.phy-...
Saturday, October 28, 2006 at 4:28pm by Ronald
What is the relationship between diffusion and osmosis? http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/diffus.html http://www.mun.ca/biology/Osmosis_Diffusion/tutor2.html http://biology.arizona.edu/sciconn/lessons/mccandless/reading.html http://www.google.com/search?as_q=...
Sunday, November 12, 2006 at 11:33pm by Kim
Calculate the translational kinetic energy of O2 at a) 300. K b) 1000. K Speed is not given. Do I need to find the average speed first? The formula I'm using is Ek= 1/2m v^2 I notice I'm not given mass in the problem either. Would I use molar mass? You are on a tangent. You ...
Saturday, January 6, 2007 at 9:45pm by John
Under what circumstances, if any, will a converging lens form an inverted image of a real object? Under what circumstances, if any, will a diverging lens forms an erect image of a real object? http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/raydiag.html#c1
Thursday, February 1, 2007 at 10:21am by Lacy
Compute the rms speed of a nitrogen molecule at 31.0°C. At what temperature will the rms speed be half that value? At what temperature will the rms speed be twice that value? T = 31 C = 304 K Mass M = 28 g/(6.02*10^23) = 4.65*10^-23 g = 4.65*10^-26 kg The average kinetic ...
Friday, February 23, 2007 at 2:48am by Physics/Math
Science Question 1
If our Sun was Population II, the solar system would contain no ________ planets. Since this is not my area of expertise, I searched Google under the key words "sun population II" to get these possible sources: http://en.wikipedia.org/wiki/Metallicity http://physics.uoregon....
Monday, March 5, 2007 at 12:04pm by Liz
The study of human population patterns is called _________________. Thank you for using the Jiskha Homework Help Forum. Here is what the Online Dictionary says: Main Entry: de·mog·ra·phy Pronunciation: di-'mä-gr&-fE Function: noun Etymology: French dé...
Sunday, March 18, 2007 at 7:44pm by Mack
Physics please check
A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 88 kg. A person pushes on the outer edge of one pane with a force of F = 53 N that is directed perpendicular to the pane. Determine the magnitude of the door's angular ...
Monday, March 26, 2007 at 12:53am by Jim
What causes surface tension? Please and thanks for the help. intermolecular forces, that is , molecules attracting other molecules, and "holding fast" together. Here are a couple of pretty good sites where you can read more about it. http://en.wikipedia.org/wiki/...
Monday, April 9, 2007 at 5:41pm by Julie
What are the 4 nuclear forces? Out of the 4 which one is the strongest and which one is the weakest? Thanks http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html THANK YOU As a side note, these are not nuclear forces. They are the four fundamental forces in nature, ...
Wednesday, April 11, 2007 at 4:04pm by Zach
Physics - SHM
An oscillating block-spring system has a mechanical energy of 1.00 J, an amplitude of 11.2 cm, and a maximum speed of 1.08 m/s. (a) Find the spring constant. ___ N/m (b) Find the mass of the block. ___ kg (c) Find the frequency of oscillation. ___ Hz .. im having difficulty ...
Thursday, April 12, 2007 at 3:42am by COFFEE
Physics - Mechanics
A body is supported by a spiral spring and causes a stretch of 1.5cm in the spring. If the mass is now set in vertical oscillation of small amplitude, what is the periodic time of oscillation Doesn't angular frequency= sqrt (k/m) ? where k= mg/.0015 or 2PI/T= sqrt (g/.0015) ...
Thursday, April 12, 2007 at 9:49am by Febby-1
plz help If you carefully place a steel razor blade flat on the surface of water, the razor blade can be made to float. Explain this result, given that the density of steel is much greater than that of water. I'm not really sure what the answer is. I think it has something to ...
Wednesday, April 18, 2007 at 8:58pm by Natalie
could someone PLEASEE help me? Ive procrastinated and i'm really desperate... I'm supposed to teach the class about "relativistic momentum and mass" in terms of special theory of relativeity. i looked up infomation on google, but i dont understnad because its mostly university...
Monday, April 23, 2007 at 5:24pm by kay