Vectors have magnitude and direction, scalars only have magnitude, t<span>here are some </span>quantities<span>, like speed, which have very special definitions</span>
<u>Answer:</u>
"Where friction or rubbing results in the transfer of electrons between particles, objects can become negatively or positively charged."
<u>Explanation:</u>
The motion resistance of one moving object with respect to another is called as "Friction". It isn't a basic force, like gravity or electromagnetism. Alternatively, scientists believe it is the product of the electromagnetic attraction in two touching surfaces between charged particles.
The friction have formula:
Friction force (<em>f </em>) = coefficient of friction × normal force (N)
For an instances when one ride a bicycle, an example of rolling friction is the contact between the wheel and the way.
Just took the quiz on k12 and the answer is A. compressional waves
Answer:
0.567 Weber
Explanation:
side, a = 0.31 m, B = 5.9 T
Area, A = (0.31)^2 = 0.0961 m^2
Magnetic flux, ∅ = B x A
∅ = 5.9 x 0.0961 = 0.567 Weber
Answer:
Explanation:
The electric force between two point charges can be calculated by Coulomb's Law:
We have to calculate the distance between two points; (0,0) and (0.3 m, 0.2 m).
Now we can apply Coulomb's Law
The minus sign in front of the force means that the force is attractive.
The direction of the force can be calculated as follows:
where θ is the angle between F and the x-axis. This angle can be calculated by the triangle with edges 0.3 m, 0.2 m, and 0.36 m.
So, sin(θ) = 0.2/0.36 = 0.55 and cos(θ) = 0.3/0.36 = 0.83.
Finally,