Answer:
MT disc I = 2,752 10-3 kg m²
MB disc I = 2,726 10⁻³ kg m²
Explanation:
The moment of inertia given by the expression
I = ∫ r² dm
for bodies with high symmetry it is tabulated
for a hollow disk it is
I = ½ M (R₁² + R₂²)
let's apply this equation to our case
disc MT = 1,357 kg
I = ½ 1,357 (0.0079² + 0.0632²)
I = 2,752 10-3 kg m²
disk MB = 1,344 kg
I = ½ 1,344 (0.0079² + 0.0632²)
I = 2,726 10⁻³ kg m²
Answer:
d. The length of the string is equal to one-half of a wavelength.
Explanation:
For a standing waves vibrating with Fundamental Frequency will be vibrate in one loop so Length 2 L = λ ⇒ L = 1/2 λ
Answer:
However, the disadvantages are:
1. Many atimes for some motion prolems, free-body diagrams has to be drawn many times so to have enough equations to solve for the unknowns. This is not the same with energy conservation principles.
2. In situations where we need to find the internal forces acting on an object, we can't truly solve such problems using free-body diagram as it captures external forces. This is not the same with energy conservation principles.
Explanation:
Often times the ideal method to use in solving motion problem related questions are mostly debated.
Energy conservation principles applies to isolated systems are useful when object changes their positions in moving upward or downward converts its potential energy due to gravity for kinetic energy, or the other way round. When energy in a system or motion remains constant that is energy is neither created nor destroyed, it can therefore be easier to calculate other unknown paramters like in the motion problem velocity, distance bearing it in mind that energy can only change from one type to another.
On the other hand, free body diagram which is a visual representation of all the forces acting on an object including their directions has so many advantages in solving motion related problems which include finding relationship between force and motion in identifying the force acting on a body.
Answer:
Explanation:
Gauss's Law says that the electric flux 
through a closed surface is directly proportional to the charge 
inside it. More precisely,
This means what is outside this closed surface 
does not contribute to the flux through it because field lines that go in must come out, <em>resulting a zero flux from an external charge. </em>
In our context, this means the charge 
which is outside the sphere will have zero flux through the surface; therefore, Gauss's law will only be concerned with charge 
which is inside the sphere; Hence,
Solving for gives
which is the charge inside the sphere.
