Number of results: 110,449
Physics Newton law
A 10O0Kg elevator is hoisted upward from rest by a cable. In the first two seconds there is an 1100N tension force in the cable hoisting the elevator. What is the speed after two seconds and how far has it travelled ? Get the acceleration first. Tension=mg + m*acceleration. ...
Sunday, November 5, 2006 at 2:03pm by harry
Please confirm/tidy up my fragile understanding as follows: Boyles Law is apparently now known by another name???? If I compressed the air in a room into a cylinder obviously everything that was in the room is now in the cylinder including the heat. As the heat out of a large ...
Friday, October 12, 2007 at 1:47am by Mike
The effect of temperature rising when gases are compressed, and cooling when expanded is true, but for a very different reason than you suggested. What you have done is mix the concepts heat and temperature. One does not imply the other. There are many good physics books which...
Friday, October 12, 2007 at 1:47am by bobpursley
I need help with the following questions from my homework. thanks! How does one coulomb of charge compare with the charge of a single electron? How is coulombs law similar to Newton's law of gravitation? How is it different?
Monday, November 5, 2007 at 8:13pm by Whit
On a), don't forget that the force on the valence electron includes the attractive force of the nuclues, and the repulsive forces from the inner electrons. So, for a gross simplification, assume a net charge of +1e at the nucleus. Yes, this is a gross simplifiation, but ...
Thursday, February 7, 2008 at 8:44pm by bobpursley
You have to assume the small spherical insulator is a point charge. The force horizontal is given by coulombs law, so looking at the diagram, TanTheta=horizontalforce/vertical force. Of course, the vertical force is mg. Tension in the wire? SinTheta=horizonalforce/tension.
Sunday, March 23, 2008 at 10:36am by bobpursley
1. If a surface is a 10 meter by 10 meter plane lying in the y-z plane, what is the vector representing the area of the plane? 2. If a sphere of radius 2 meters is placed in a uniform electric field of 3 N/C, what is the net flux through the sphere? 3. Show how Gauss's Law can...
Sunday, March 23, 2008 at 6:11pm by Bobby
Physics-Gauss' Law, hard
2. A long, insulating cylinder has a uniform charge density, ro=-2*mu*C/m^3, and a radius, R=15cm. a) What is the total charge on a 40cm length of that cylinder? volume of .4 m length = pi r^2 L = pi (.15)^2 (.4) = .02827 m^3 Q = ro * volume = -.05655 *10^-6 = -5.66*10^-8 C b...
Sunday, March 23, 2008 at 6:29pm by Damon
Physics-Gauss' Law, hard
Thank you Damon for answering my first questions fast and accurately. Do you or anybody else know how to do these harder Gauss' Law Problems? 1. A solid metal sphere of radius R has charge +2Q. A hollow spherical shell of radius 3R placed concentric with the first sphere has ...
Sunday, March 23, 2008 at 6:29pm by Bobby
physics gauss law
In a spherical region, the voltage is measured to be spherically symmetrical, with V = VCr) = wrg • The constants, wand g, are positive. a. Find the radial electric field. b. Use Gauss' Law to find the charge enclosed in a sphere of radius r. c. Find the charge enclosed by a ...
Monday, October 20, 2008 at 6:03pm by Eric
You can do this... Coulombs law Newton's law of gravity.
Monday, February 2, 2009 at 9:41pm by bobpursley
Look up Coulombs law. http://en.wikipedia.org/wiki/Coulomb%27s_law
Monday, April 6, 2009 at 8:35pm by bobpursley
Find the distance to the point from the origin. d=sqrt (x^2+y^2) working it in meters Then coulombs law.
Thursday, August 13, 2009 at 11:06am by bobpursley
Your attempt to cut and paste your assignment failed. Use Coulombs law: F=kQ1*Q2/distance^2 you need to be careful with units, you did not specify dimentsions. acceleration= force/mass
Monday, August 29, 2011 at 6:09pm by bobpursley
There is a figure with a +2.0 UC charge on the left and a -2.0 uC charge on the right. P is in the center between the two charges. They are 5.0 cm apart. 1) Find the electric field 5.0 cm to the left of P. 2) Find the electric filed 5.0 cm directly above P. 3) Find the ...
Wednesday, August 19, 2009 at 12:07am by Sammy
2) you have the x distance, and the y distance to each charge. Use that distance in coulombs law. Now above P, you can simplify Ey greatly by using symettry arguments (Eydue to the rigth will be downward, Ey due to left will be upward, such that the vertical components cancel...
Wednesday, August 19, 2009 at 12:07am by bobpursley
Physics - Coulombs Law
Two identical objects have charges 6.0*10^-6 and -2.0*10^-6 respectively. When placed a distance d apart, their force of attraction is 2.0N If the objects touched together, then moved to a distance of separation of 2d, what will be the new force between them. Ans: I tried the ...
Sunday, October 17, 2010 at 8:52am by Anonymous
physics coulombs law
a negative charge 5.0 X 10^-4 C exerts a repulstio force of 7.0 N .on second charge away 0.05 m away. what is the sign and magnitude of the second charge
Wednesday, December 5, 2012 at 4:37am by adithya
physics (coulombs law)
a charge +6 C experiences a force of 2mN in +x direction. a)what was the electric field there before charge was placed ? b)describe the force which a -2c charge would experience if it is located at the point in place of the +6c for a) i assumed the charge is 0 'cos there's no ...
Saturday, December 8, 2012 at 9:48pm by lola
physics (coulombs law)
2m N/ 6 C = E in Newtons/coulomb (-2/6) (2m N) ==================================== for a) i assumed the charge is 0 'cos there's no charge placed before that.is it correct? NO! E is force experienced by test charge of one coulomb
Saturday, December 8, 2012 at 9:48pm by Damon