Notes, summaries, assignments, exams, and exercises for Physics for Secondary education

Physics and Chemistry

The scientific method is the process used to investigate natural phenomena. It involves observation, research, hypothesis formulation, experimentation, result interpretation, law formulation, theory and model development, and finally, a scientific report.

Magnitude: A measurable quantity. A crucial magnitude is defined independently; a derived magnitude is defined from other key magnitudes.

Measurement: Comparing a quantity with a unit. The result is often expressed numerically.

Unit: A standard quantity used for comparison. Units must be constant, universal, and reproducible. The International System of Units (SI) is an agreed-upon system.

Accuracy: The smallest variation a tool can measure.

Substance: Anything that has...

rReference point system or set of points in space about which describes the motion of a body.
movement is the change in position of a body co l respectoa reference system, otherwise we say that is at rest.
point position of the space occupied by a mobile in an instant
path formed by successive fucking line holding a mobile in motion.
Deplazes vector is the vector that joins two points on a trajectory.
distance is the length, averaged over the path, which exsist in tween the initial and final pisiciones.
rapid speed with which a mobile changes its position.
cocientre average speed between the distance traveled by the mobile and the time spent on ecoregions.
intantania speed has a mobile speed at any given time.
uniform rectilinear motion

Defining Science and Technology

Science is the study of the laws governing various aspects of nature, aimed at establishing a set of systematized knowledge distinct from common sense. It utilizes the scientific method for its inquiries. Technology is the body of knowledge used to create objects and machines that adapt to the environment and meet human needs. These technologies can be used to protect the environment and prevent the exhaustion of material and energy resources on our planet.

Key Roles in Science

• Scientist: A person who dedicates their time to studying science.
• Coach: An expert in a specific science, craft, or field, particularly one who understands the necessary appliances.

The Fundamentals of Physics

Physics is a natural science that...

Waves transfer energy without mass transfer.
Mechanical waves such as sound or waves on a string require a medium for the propagation, electromagnetic waves like light and radio, not require a medium to spread.
In transverse waves, particles of the medium move perpendicular to the direction of wave propagation. In a longitudinal wave the particles move parallel to the direction of the wave. On the surface waves, the particles move both parallel and perpendicular to the direction of wave movement.
The wave frequency f, is the number of vibrations per second from any point on a wave. The wave period is the time interval between successive peaks or valleys.
The shortest distance between points where the same pattern is repeated wave is called

Item 1. Kinematics and Reference Systems

Referral System

A reference system is a point or set of points we use to determine if a body moves. If a moving body changes its position with respect to the reference as time passes, it is moving; if it does not change its position, it is at rest.

Path and Displacement

• Path: The path (e.g., Path A) describes the trajectory of the object on its way; that is, the set of points through which it passes in its movement.
• Displacement: A vector that originates at the starting point of the movement and ends at the final point of movement.

Speed and Velocity

• Speed: The magnitude of displacement per unit time. It is measured in m/s.
• Instantaneous Speed: The speed value at any given moment, often measured in a speedometer.

Application of Atomic Structure to Static Electricity

• All material objects are composed of atoms.
• An atom consists of a nucleus and a vast region of space outside the nucleus.
• The nucleus of the atom contains positively charged protons and neutral neutrons.

Charging by Friction

The frictional charging process results in a transfer of electrons between the two objects which are rubbed together.

Triboelectric Series: materiales ordenados según la capacidad de tendencia de atraer electrones.

Electrizar: cargar una sustancia/cuerpo que era neutra.

Charging by Induction

Is a method used to charge an object without actually touching the object to any other charged object.

The Electroscope

An electroscope is a device which is capable of detecting the presence...

The oil hydraulic controls and actuators have become increasingly important in team building.
There are numerous machines and plants of modern design and greater efficiency that allow the use of oil-hydraulics in systems of command and control.
Today it is not possible without the oleohidráulica which to develop large forces with small volumes of fluid, laden movements from rest, the easy realization of continuous monitoring of speed and thrust, in addition to the versatile use of cycles.
Currently the technology is applied in hydraulic rigs, Cargie, excavators, farm equipment, telescopic legs, drive presses, valves, etc..
This development forces us to knowledge of this area and gain some degree of control over oil hydraulic systems so...

Energy

Energy is the capacity of bodies to produce transformations in themselves or other bodies.

Energy Sources

Energy sources are natural resources from which humans can obtain usable energy.

Types of Energy Sources

• Non-renewable: Found in limited quantities and are depleted with use.
• Renewable: Considered inexhaustible as they are continuously renewed.

Energy Principles

• Conservation of Energy: The total energy in the universe remains constant in any process.
• Degradation Principle: With each transformation, energy loses quality and produces new transformations.

Work and Power

Work (W) is done when a constant force (F) is applied to a body, causing a displacement (d) in the same direction as the force: W = F * d.

Power is the rate at which work is done....

Understanding Pendulums

State the following terms:

• Pendulum
• Simple pendulum
• Conical pendulum

Ans: A tiny mass (assumed to be a point object and called a bob) connected to a long, flexible, massless, inextensible string, and suspended to a rigid support is called a pendulum.

If a tiny mass (assumed to be a point object and called a bob) connected to a long, flexible, massless, inextensible string, and suspended to a rigid support is made to oscillate in a single vertical plane, it is said to be a simple pendulum.

A tiny mass (assumed to be a point object and called a bob) connected to a long, flexible, massless, inextensible string, and suspended to a rigid support revolves in such a way that the string moves along the surface of a right circular cone...

1. What is Electric Charge?

Electric Charge is a fundamental property that all objects possess.

2. True or False: Atomic Structure and Current

• a. The atom is comprised of bigger particles.
  FALSE. The atom is comprised of smaller particles.
• b. Protons have a negative charge.
  FALSE. Protons have a positive charge.
• c. Neutrons have a positive charge.
  FALSE. Neutrons do not have an electric charge.
• d. An electric current is a continuous movement of electrons from the positive pole to the negative pole.
  FALSE. An electric current is a continuous movement of electrons from the negative pole to the positive pole.

3. Why is Matter Neutral?

Matter is neutral because it does not have a net electric charge; the number of electrons is equal to the number of protons....