Notes, summaries, assignments, exams, and exercises for Physics for Baccalaureate

Native American Literature

The Notion of the Indian

Indian / Native American - Stereotypes - Homogenizing / great diversity (over 500 tribes) - Othering - A non-presence, a void to be occupied.

The American Indian Movement

«Red Power» Influenced by the black civil rights movement - Pan-Indian identity - Occupation of Alcatraz Island (1969) «Trail of Broken Treaties» - march on Washington, 1972 - Native American Demands the 20-point proposal

Native American Literature

Originally oral cultures: myths and rituals, songs, poems, narrative tales, legends, parables. Oral works translated into English by ethnologists. First novels: John Rollin Ridge’s The Life and Adventures of Joaquín Murieta (1857); Wynema, by Sophia Alice Callahan (1891).

Literary

Sound Intensity and Loudness

The intensity of a sound wave, often referred to as volume, depends on the square of its frequency and the square of its amplitude. The human ear can detect sounds with an intensity starting from 10^-12 W m^-2, known as the threshold of hearing. At an intensity of 1 W m^-2, the pain threshold is reached. To quantify the sensation of loudness, we define the sound intensity level:

Where I is the sound intensity and I₀ is the threshold of hearing. The unit used to measure the level of loudness is the decibel (dB).

Wave Absorption and Intensity Decay

Beyond the decrease in intensity due to distance, waves also experience a reduction in energy caused by the medium through which they travel. This phenomenon, known as absorption,...

The Compound Microscope: Function and Structure

The microscope is fundamentally a system designed to enhance the image of objects. The compound microscope, also known as the optical microscope, is an instrument featuring several lenses. It allows the observation of objects smaller than 0.1 mm, magnifying them up to 1500 times.

Key Systems of the Compound Microscope

The compound microscope is structurally divided into three primary systems:

• The Mechanical System (Support and Movement)
• The Optical System (Magnification)
• The Lighting System (Illumination)

The Mechanical System: Support and Movement

This system includes all parts that provide support and allow for movement and precise adjustment of the microscope components.

• Base or Foot: Provides stability

The Electromagnetic Spectrum

In a vacuum, electromagnetic waves move at the same speed and differ from each other by their frequency. They are classified by the frequency of the electromagnetic spectrum.

Frequency Classifications

• Radio Waves: Thousands of Hertz (kHz) are considered very low frequency.
• AM Radio: One million Hertz (MHz).
• TV Band: Very high frequency (VHF) waves begin at about 50 MHz.
• FM Radio: Operates between 88-108 MHz.
• UHF: Ultra-high frequency waves.
• Microwaves and Infrared: Often referred to as heat waves.

Visible Light and Higher Frequencies

Visible light constitutes less than a millionth of 1% of the electromagnetic spectrum. The minimum frequency visible to the human eye is red, while the maximum frequency is nearly twice that...

1. Energy Transmission at a Distance

Energy can be transferred from one body to another. There are processes that transmit energy even when bodies are separated, such as the emission of sound or light.

Sound

Sound is a mechanical vibration that propagates through material media. For example, the noise from a truck can cause a distant window to vibrate.

Light

Light is radiant energy consisting of particles called photons that propagate through a vacuum and transparent materials like air and water. Sunlight travels through the vacuum of space, heating the Earth after traversing 150 million kilometers.

This form of energy propagation is often referred to as sound waves and light waves. Optics and acoustics are the two branches of physics responsible...

Understanding Light: Key Optical Concepts

Index of Refraction

We define the index of refraction (n) of a medium as the ratio between the speed of light in a vacuum (c) and the speed of light in that medium (v):

n = c / v

Laws of Reflection of Light

When light rays strike a surface, they undergo a rebound that follows these laws:

1. The incident ray, the normal to the surface, and the reflected ray all lie in the same plane.
2. The angle of incidence (i) is equal to the angle of reflection (r), and they are on opposite sides of the normal: i = r.

Laws of Refraction of Light

When light passes from one transparent medium to another where the speed of light changes, its direction also changes. This phenomenon is known as the refraction of light, governed by these...

Wave Phenomena: Reflection and Refraction

The study of wave phenomena, such as reflection and refraction, is fundamental to understanding how waves interact with different environments.

When a wave encounters a boundary between two media, part of its energy is reflected, continuing to spread within the original environment. The other part of the wave passes through the boundary, undergoing refraction.

To analyze these phenomena, we establish the concept of a normal: an imaginary line perpendicular to the surface at the point of incidence. Key angles involved are:

• (I) Incidence Angle: The angle between the incident ray and the normal.
• (r) Reflection Angle: The angle between the reflected ray and the normal.
• (R) Refraction Angle: The angle between

What are New Year's resolutions?

New Year's resolutions are a person's (good) intentions for the coming year.

Why does Adrian think that his spot is growing?

Adrian thinks that his spot is growing because his mother doesn't know about vitamins.

When the dog has the operation, what does the vet find? Why?

The vet finds many things in the dog's stomach. There were even plastic pirates from Adrian's father's model ship. The dog had eaten these things.

Exactly how old is Adrian at the beginning of his diary?

Adrian is 133/4 years old at the beginning of his diary.

Why did Adrian think Nigel was being polite when he told him that he was going to the doctor?

Adrian thought that Nigel was being polite because Nigel said he couldn't see Adrian's spot.

Why did

Understanding Physical Forces

A force is the interaction of a body with something external to it and is capable of:

• Modifying its state of motion or rest (we will focus on it).
• Causing deformation.

The Normal Force

The normal force (N) is a reaction force; it is a force resulting from the application of Newton’s third law, which must have exactly the value required for the net force along its axis to be null.

Newton’s Laws of Motion

Newton’s First Law

Newton’s first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This tendency to resist changes in a state of motion is inertia.

Newton’s Second Law

Newton's second law of motion can...