Answer:
2.8 m/s
Explanation:
Energy of a system cannot be destroyed . It can only be transfer to another form of energy.
when the pendulum is at rest in a height 0.4 m , it has a potential energy due to the height it is. but no kinetic energy since ni movement (velocity)
at the time it reach the lowest point of the path , we can say that it is in the minimum potential level , therefore it now does not have any potential energy , but has a kinetic energy
energy at rest = energy at lowest point
KE1 + PE1 = KE2 + PE2
0 + 1.5 * 9.8 *0.4=
V=√(2*9.8*0.4)
V = 2.8 m/s
Explanation:
For this problem we have to take into account the expression
J = I/area = I/(π*r^(2))
By taking I we have
I = π*r^(2)*J
(a)
For Ja = J0r/R the current is not constant in the wire. Hence
and on the surface the current is
(b)
For Jb = J0(1 - r/R)
and on the surface
(c)
Ja maximizes the current density near the wire's surface
Additional point
The total current in the wire is obtained by integrating
and in a simmilar way for Jb
And it is only necessary to replace J0 and R.
I hope this is useful for you
regards
Answer:
8200 N
Explanation:
F=ma where F is force, m is mass and a is acceleration
where s is distance, t is time and u is initial velocity
Answer:
Energy
A wave is a disturbance that carries energy from one place to another through matter and space.
Explanation:
A wave can be defined as a form of disturbance that carries energy from one place to another through matter and space.
The energy of wave depends on the frequency of the wave and the wavelength (lambda) of that particular wave.
Mathematically,
V = f × lambda