Answer:
upper motor neurons in the premotor cortex
Explanation:
Motor neurons are a type of nervous system cells that are located in the brain and in the spinal cord. They have the function of producing the stimuli that cause the contraction of the different muscle groups of the organism. They are therefore essential for daily activities that require muscle contraction: walking, talking, moving hands and in general all body movements.
Answer:
3.6 x 10^8 V
Explanation:
Q = 4 m C = 4 x 10^-3 C
r = 5 cm = 0.05 m
The formula for the potential at the surface is
Vs = K Q / r = (9 x 10^9 x 4 x 10^-3) / 0.05 = 7.2 x 10^8 V
The formula for the potential at the centre is
Vc = 3/2 Vs
Vc = 1.5 x 7.2 x 10^8 V = 10.8 x 10^8 V
The difference in potential is
V = Vc - Vs = 10.8 x 10^8 - 7.2 x 10^8 = 3.6 x 10^8 V
Answer:
The electron is 5.88 m far from origin when it momentarily stops.
Explanation:
The position of electron on x-axis is given by the equation:
x = 16 t m __________ eqn(1)
The speed of particle can be found out by taking derivative of "x" with respect to "t"
V = dx/dt = 16[-t + ]
V = 16(1 - t)
Now, when the electron stops, its velocity becomes zero.
V = 0 = 16(1 - t)
(1 - t) = 0
<u>Either</u>: = 0
-t = ln(0)
t = infinity (Since, time can not be infinite, thus this answer is rejected)
<u>Or</u>: 1 - t = 0
<u>t = 1 sec</u>
Therefore, at t= 1 sec, the electron will stop momentarily.
Using t = 1 sec in eqn (1), we find the position of electron.
x = 16(1) m
<u>x = 5.88 m</u>
<u></u>
Answer:
Explanation:
Given that
Stored energy ,
Angular speed ,
Lets take moment of inertia of the flywheel = I
As we know that stored energy in the flywheel is given as
Now by putting the values in the above equation we get
Therefore the moment of inertia of the flywheel will be
The answer will be C.
YOUR ANSWER IS:
When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
Hope this helps. :)