Recent Homework Questions About Physics
In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of a free charged particle. A changing magnetic field can, and this is one way particle beams are accelerated. Consider free protons following a ...
Thursday, December 5, 2013 at 8:36am
A standing wave is set up in a string of variable length and tension by a vibrator of variable frequency. Both ends of the string are fixed. When the vibrator has a frequency fA, in a string of length LA and under tension TA, nA antinodes are set up in the string. (a) Write an...
Thursday, December 5, 2013 at 5:00am
Can you give me the summary of work,force,potential & kinetic energy,power?
Thursday, December 5, 2013 at 12:22am
F = m a G m M/r^2 = m V^2/r m, the mass of the satellite, is irrelevant, cancels. G M = V^2 r distance around circumference = 2 pi r so t = 2 pi r / V or V = 2 pi r/t so G M = (2 pi)^2 (r^3/t^2) or t^2 = (2 pi)^2 r^3/ (G M) here G = 6.67*10^=11 M = 5.98 *10^24 Kg r = 6.38*10^6...
Wednesday, December 4, 2013 at 11:09pm
What part of an object follows a smooth path when the object is made to spin through the air or across a flat smooth surface?
Wednesday, December 4, 2013 at 11:06pm
An unknown material has a normal melting/freezing point of -20.4 °C, and the liquid phase has a specific heat capacity of 179 J/(kg C°). One-tenth of a kilogram of the solid at -20.4 °C is put into a 0.130-kg aluminum calorimeter cup that contains 0.198 kg of ...
Wednesday, December 4, 2013 at 10:32pm
At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches its maximum speed at the bottom. If the ...
Wednesday, December 4, 2013 at 10:00pm
This speed is the maximum possible speed attained by the roller coaster, or the theoretical speed. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster design can be ...
Wednesday, December 4, 2013 at 9:57pm
Physics I Newton's 2nd Law
excuse me? One of the most fundamental identities is F = ma
Wednesday, December 4, 2013 at 9:42pm
There are two things in life, physics and everything else is stamp collecting.
Wednesday, December 4, 2013 at 7:29pm
y= -0.42 The region isn't between the wires
Monday, December 2, 2013 at 9:07pm
Physics Classical Mechanics
Wednesday, November 27, 2013 at 3:38pm
Physics Classical Mechanics
Tuesday, November 26, 2013 at 10:25am
Sunday, July 14, 2013 at 3:57pm
Everyone loves 69.. I did it last night with Barney
Tuesday, April 10, 2012 at 4:41pm
E.p is equal to mgh 8 mutiply by 10 multiply by 100 is equal to 800joules
Sunday, January 22, 2012 at 1:20am
Thursday, November 18, 2010 at 5:19pm
mass of ice
Monday, April 26, 2010 at 12:16am