when you work with dimensions, use the fundamental units.
mass : kilogram: [kg]
length : meter : [m]
time : second : [s]
so speed ; [m]/[s]
acceleration : [m]/[s]^2
force in newtons [N] = [kg][m]/[s]^2
work or energy is in joules [J] = [N][m] = [kg][m]^2 /[s]^2
When you have a formula, it...
Hello everybody,
gravitationnal acceleration is g = 9.8 m/s^2.
It is when you analyse a situation let's say that an object is moving upward, you know that its weight is downward, so when you have a situation in which there are two opposite directions, you choose one that is positive (usually the...
a test charge halfway between q2 and q3,call this point M, will experience a repulsion from q2, attraction from q3 with the same intensity. so the electric field at M will have a component along the line joining M and q3.
But the same test charge at M will also experience a repulsion from q1...
Hi flipstyle,
you have an equilateral triangle, so if you trace a line which joint q3 and the midpoint between q1 q2, the lengh of this segment will be d√3/2.
A test charge placed at halfway between q1 and q2 will be affected only by q3 since the influence of q1 and q2 cancel each other. So the...
When you heath water, the water pressure augment at the interface between water and air
The boiling point of water vary with the pressure of the atmosphere.
At sea level the boiling point is 100 ˚C where the air pressure is highest.
At higher altitude the pressure of the atmosphere is getting...
I eltel,
you must analyse two cases:
A negative then B must be positive so that the net force be zero on p.
A positive then B must be negative....
Then use Coulomb's law to complete your reasoning.
there is an error in the calculations of SatusX.
The basic relation with hyperbolic function is
cosh^2 x - sinh^2 x = 1.
Now if
y = sinh-1 x
than
x = sinh y
dx/dy = coshy
but cosh^2 y = 1+sinh^2y =1+x^2.
so
dy/dx =1/sqrt(1+x^2)
where sqrt means square root.
bye
You have to remember the famous equation of Einstein: E = mc^2.
Where m is the mass of the particle when it moves.
the kinetic energie is the difference between the energy of the particle when it is movin and the rest energy (the energy that the particle has when it is at rest).
You must know...
The potential energy is positive. So there is an attraction toward the origin.
The force = - (dW/dx) = -2kx.
So the force is directed from the point P to the point O, the origin.
bye
Suppose that the magnetic field is vertical upward.
Suppose you have a round loop in a horizontal plane.
Now rotate the loop along an axis wich is horizontal.
What will happen to the flux of the magnetic field through the loop?
A current in a wire can be viewed as the two types of charges moving in opposite direction. Say in a horizontal wire, from left to right, negative charges moving to the left and positive charges moving to the right. So for a test test charge at rest outside the wire, the wire will be neutral...