Answer:
1 and 4, 2 and 3, 5 and 9, 6 and 8
Explanation:
7 would not have a pair because there is not enough statements
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:
It is called force of friction
Explanation:
The force of friction is a force that acts between two objects whose surfaces are in contact with each other.
Consider the typical case of an object sliding along a certain surface. There are two types of frictions:
- Static friction: this is the force of friction that acts when the object is not in motion yet. If you push the object forward with a force F, the object will not move immediately, but it will "oppose" to this motion with a force of static friction exactly equal to the push applied:
However, this force of static friction has a maximum value, which is given by
where
is the coefficient of static friction
N is the normal reaction exerted by the surface on the object
So, when becomes greater than , the static friction is no longer able to balance the push applied, and the object will start sliding forward.
- Kinetic friction: this is the force of friction that acts when the object is already in motion. Its magnitude is given by
where
is the coefficient of kinetic friction, and its value is generally smaller than . The direction of this force is also opposite to the direction of motion of the object.
It's B.
It's never going to be true UNLESS you cooled the entire thing to below zero then it could be true.
Ionic bonds with electrostatic attractions