First, J.J Thompson experimented with cathode ray tubes: sealed glass tubes at vaccum (without air inside), with two electrons (cathode and anode). When a high voltage was applied a beam of particles left from the cathode and passed throuhg two charged plates (one negative and one positive).
The beam of particles was deflected toward the positively-charged electric plate, which indeicatedd that the particles were negatively charged.
Given that Thompson experimented with different materials (cathode electrodes), that the results were always the same, and that the mass of the electrons were a small fraction (approximately 1/2000) of the hydrogen atom, he concluded that the negatively particle was part of the atom (a subatomic particle).
Also, given that the atom is neutral, he concluded that there were negative and positive particles in any atom, and he speculated that the negative particles (electrons) were scattered into the positive particles which were way more massive.
Answer:
Explanation:
As with all atoms known, electrons moves in discrete energy levels round a well defined orbit.
Protons are restricted to the nucleus of an atom. They occupy this small and massive position along with the neutrons.
Metals, have a large dense cloud of electrons.
- Every atom is made up of three fundamental particles.
- Protons, neutrons and electrons are these particles.
- Protons are positively charged and they occupy the tiny nucleus. Neutrons are found in the nucleus with them. They do not carry any charge.
- It is correct to infer their position as being fixed.
- Electrons occupies the bulk of the volume of the atom.
- They orbit round the tiny nucleus.
Therefore, it is safe to conclude that in metal conductors, electrons move but protons do not just like in every other atom.
Think of the cell membrane as a net and the nutrients are the perfect fit to fall through it. Where the waste is not the right size and will not fit through the holes of the net.
We can find the acceleration as follows:
Answer:
D. 2 m/s^2
Additional Information:
I couldn't get your question very clearly. In order to solve the question, I will define moment of inertia, state the formula and factors that the moment of inertia of a body depends and does not depend on.
Answer:
<u>Moment of inertia depends on;</u>
1. Mass of the body
2. Axis of rotation and
3. Distribution of the body
<u>Moment of inertia does not depend on;</u>
1. Angular velocity of the body.
Explanation:
The moment of inertia is defined as a quantity that determines the torque needed for a desired angular acceleration or a property of a body due to which it resists angular acceleration about a rotational axis.
Moment of Inertia, I = ∑mr²
Where,
I is the moment of Inertia
m is the mass
r is the distance from the axis of the rotation
The moment of inertia of a body depends on distribution of body, axis of rotation and mass of the body. However, the moment of Inertia of a body is not dependent on angular velocity of the body.
