Dokumen tersebut membahas tentang magnetisme dan elektromagnetisme. Secara singkat, dibahas tentang tiga jenis bahan berdasarkan sifat magnetiknya (ferromagnetik, paramagnetik, diamagnetik), sifat-sifat magnet, teori medan dan kemagnetan bumi, serta elektromagnet dan aplikasinya seperti bel listrik dan telepon.
1. Makalah ini membahas tentang bola langit dan tata koordinat, termasuk penjelasan tentang bola langit, tata koordinat horison, tata koordinat ekuator, gerak langit dilihat dari berbagai tempat di Bumi, trigonometri bola, dan hubungan antara tata koordinat horison dan ekuator.
2. Diberikan penjelasan tentang unsur-unsur bola langit seperti zenith, nadir, ekuator langit, dan lingkaran jam.
3. Dij
The document discusses concepts of time, the solar system, Earth's movements, and how these relate to measuring and standardizing time. It covers three key points:
1) Earth's rotation on its axis and revolution around the sun cause day/night cycles and seasons. Kepler's laws describe planetary motion.
2) Time is measured using solar time, mean solar time, time zones, and Coordinated Universal Time (UTC). Conversion methods allow determining time in different locations.
3) Daylight saving time, international date line, and sunrise/sunset variations depend on factors like latitude and solar declination. Twilight durations are longest at high latitudes and when the sun's declination is highest
Het this is Vedika Agrawal
the topic covers magnetism keeping in mind students of physiotherapy for there subject elecrotherapy.
Well it covers magnet of class 10th and 12th and also college level to some extent.
the ppt includes diagrams for almost everything for better visual understanding.
hope you find it helpfull and elaborative.
Oersted discovered that electric currents create magnetic fields by observing that a compass needle deflected when placed near a wire with a current. He established that a moving electric charge produces a circular magnetic field around the conductor. The right-hand rule determines the direction of this magnetic field based on the direction of current flow. Oersted's findings led to new technologies like motors and generators by demonstrating the control of magnetic fields using electricity.
9.4 - Orbital Motion & Kepler's third lawsimonandisa
Kepler's 3rd law describes the relationship between the orbital period of a planet and the semi-major axis of its orbit. The square of the orbital period is directly proportional to the cube of the semi-major axis. This relationship can be derived from the fact that centripetal force due to gravity must equal the gravitational force for an object to maintain a stable orbit. Graphs of the kinetic energy, potential energy, and total energy of an orbiting object help illustrate this relationship.
Dokumen tersebut membahas tentang magnetisme dan elektromagnetisme. Secara singkat, dibahas tentang tiga jenis bahan berdasarkan sifat magnetiknya (ferromagnetik, paramagnetik, diamagnetik), sifat-sifat magnet, teori medan dan kemagnetan bumi, serta elektromagnet dan aplikasinya seperti bel listrik dan telepon.
1. Makalah ini membahas tentang bola langit dan tata koordinat, termasuk penjelasan tentang bola langit, tata koordinat horison, tata koordinat ekuator, gerak langit dilihat dari berbagai tempat di Bumi, trigonometri bola, dan hubungan antara tata koordinat horison dan ekuator.
2. Diberikan penjelasan tentang unsur-unsur bola langit seperti zenith, nadir, ekuator langit, dan lingkaran jam.
3. Dij
The document discusses concepts of time, the solar system, Earth's movements, and how these relate to measuring and standardizing time. It covers three key points:
1) Earth's rotation on its axis and revolution around the sun cause day/night cycles and seasons. Kepler's laws describe planetary motion.
2) Time is measured using solar time, mean solar time, time zones, and Coordinated Universal Time (UTC). Conversion methods allow determining time in different locations.
3) Daylight saving time, international date line, and sunrise/sunset variations depend on factors like latitude and solar declination. Twilight durations are longest at high latitudes and when the sun's declination is highest
Het this is Vedika Agrawal
the topic covers magnetism keeping in mind students of physiotherapy for there subject elecrotherapy.
Well it covers magnet of class 10th and 12th and also college level to some extent.
the ppt includes diagrams for almost everything for better visual understanding.
hope you find it helpfull and elaborative.
Oersted discovered that electric currents create magnetic fields by observing that a compass needle deflected when placed near a wire with a current. He established that a moving electric charge produces a circular magnetic field around the conductor. The right-hand rule determines the direction of this magnetic field based on the direction of current flow. Oersted's findings led to new technologies like motors and generators by demonstrating the control of magnetic fields using electricity.
9.4 - Orbital Motion & Kepler's third lawsimonandisa
Kepler's 3rd law describes the relationship between the orbital period of a planet and the semi-major axis of its orbit. The square of the orbital period is directly proportional to the cube of the semi-major axis. This relationship can be derived from the fact that centripetal force due to gravity must equal the gravitational force for an object to maintain a stable orbit. Graphs of the kinetic energy, potential energy, and total energy of an orbiting object help illustrate this relationship.
IB Astrophysics - stellar radiation and types - Flippingphysics by nothingnerdyNothingnerdy
This document discusses stellar radiation and stellar classification. Stars are classified based on their temperature, which is determined from their blackbody spectrum. Hotter stars have shorter peak wavelengths and are classified as O, B, A types while cooler stars like K and M types have longer peak wavelengths. A star's luminosity and temperature are correlated on the Hertzsprung-Russell diagram, with the main sequence containing the bulk of stars.
Dokumen tersebut berisi solusi soal olimpiade astronomi tingkat provinsi tahun 2009 yang ditulis oleh Mariano N. Dokumen tersebut memberikan penjelasan singkat tentang latar belakang pendeklarasian tahun 2009 sebagai Tahun Astronomi Internasional dan solusi untuk beberapa soal olimpiade astronomi.
Dokumen tersebut membahas tentang konsep kemagnetan dan penerapannya dalam kehidupan sehari-hari. Terdapat penjelasan mengenai standar kompetensi, indikator pencapaian kompetensi, asal usul kemagnetan, pengelompokan magnet, sifat-sifat magnet, cara membuat dan menghilangkan sifat magnet, kemagnetan bumi, dan medan magnet di sekitar arus listrik.
Newton's universal law of gravitation states that every point mass in the universe attracts every other point mass with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The gravitational field strength is defined as the gravitational force per unit mass experienced by a small test mass in the field. Field lines illustrate the direction of acceleration due to gravity and indicate that the field strength is greater nearer the surface of spherical masses.
Semiconductor.pdf description ki last lin...KALPESH-JNV
Semiconductors (SC) are a class of materials that exhibit intermediate electrical conductivity between conductors (such as metals) & insulators (such as ceramics / plastics). They are used extensively in modern electronics, as the basis for the design & fabrication of transistors, diodes, integrated circuits.
The discovery of the SC properties dates back to the late 19th century, when experiments were carried out on the electrical conductivity of various materials. In 1874, Edwin Hall discovered the phenomenon of Hall effect, which led to the discovery of SC. The Hall effect occurs when a magnetic field is applied perpendicular to the flow of electric current in a conductor, resulting in a voltage difference across the conductor. This effect was found to be more pronounced in certain materials, such as Si & Ge, which led to further investigations into their electrical properties.
SC are characterized by their unique band structure, which determines their electrical conductivity. In an ideal SC crystal, the valence band (the highest occupied energy band) is separated from the conduction band (the lowest unoccupied energy band) by a bandgap. The bandgap is a measure of the energy required to move an electron from the valence band to the conduction band, and determines whether a material is a conductor, an insulator, or a SC.
At absolute zero temperature, all electrons in a SC crystal occupy the valence band, and there are no electrons in the conduction band. However, as the temperature increases, some of the electrons gain enough energy to jump across the bandgap and move to the conduction band, where they are free to move and conduct electricity. This process is called thermal excitation, and it is responsible for the temperature dependence of the electrical conductivity of SC.
SC can be classified into two main types based on their doping properties: intrinsic and extrinsic. Intrinsic SC are pure materials such as Si or Ge, which have no impurities or dopants added to them. Intrinsic SC have a relatively low electrical conductivity at room temperature due to the presence of the bandgap. Extrinsic SC, on the other hand, are doped with impurities to modify their electrical properties.
Doping is the process of intentionally introducing impurities (also called dopants) into a SC crystal to modify its electrical properties. The impurities can either donate or accept electrons, creating excess or deficient electrons, respectively, in the crystal lattice. This alters the band structure and conductivity of the SC, making it more useful for electronic applications.
Extrinsic SC can be further classified into two types: n-type and p-type. N-type SC are doped with impurities that have excess electrons (such as phosphorus)
Jane se phele niche vali video dekh lo (VERY IMP)
https://www.youtube.com/watch?v=V5qMCRAZTN8
This ppt is as per class 12 Maharashtra State Board's new syllabus w.e.f. 2020. Images are taken from Google public sources and Maharashtra state board textbook of physics. Gif(videos) from Giphy.com. Only intention behind uploading these ppts is to help state board's class 12 students understand physics concepts.
El campo magnético terrestre se extiende desde el núcleo interno de la Tierra hasta el límite con el viento solar y varía en magnitud de 25 a 65 μT en la superficie terrestre. Este campo magnético puede considerarse como el creado por un dipolo magnético inclinado 11 grados respecto al eje de rotación de la Tierra.
Cahaya merupakan gelombang elektromagnetik yang dapat dipantulkan, dibiaskan saat melewati medium dengan indeks bias yang berbeda, dan mengalami lenturan saat melewati celah sempit. Cahaya juga merambat lurus dalam satu garis.
Dokumen tersebut memberikan penjelasan singkat soal-soal olimpiade astronomi tingkat provinsi tahun 2010 beserta jawabannya. Dokumen tersebut memberikan informasi mengenai konsep-konsep dasar astronomi seperti gerhana, orbit planet, bintang variabel, dan lainnya.
Dokumen tersebut membahas tentang magnet dan kemagnetan. Magnet adalah benda yang dapat menarik bahan tertentu lainnya. Ada tiga jenis kemagnetan yaitu ferromagnetik, paramagnetik dan diamagnetik. Magnet memiliki dua kutub, utara dan selatan, yang memiliki sifat berlawanan menarik dan tolak. Magnet juga dapat menimbulkan medan magnetik di sekitarnya.
Dokumen tersebut membahas tentang fisika optika yang mencakup pemantulan cahaya, pembiasan cahaya, cermin datar, cermin cekung, cermin cembung, lensa cekung, lensa cembung, dan alat-alat optik seperti mata, kamera, teropong, dan mikroskop.
1) Constellations are groups of stars that appear to form patterns in the night sky, though the stars within a constellation are often very far apart in reality.
2) Many early cultures saw patterns among the stars and associated them with myths and stories from their traditions, with most modern constellations derived from Greek mythology.
3) While constellations shift positions in the sky throughout the night and seasons due to Earth's rotation, they have been used for navigation, to map the sky, and bring order to observations of space.
Neptuno es el séptimo planeta del Sistema Solar y el más lejano. Está compuesto principalmente de hidrógeno, helio y agua. Tiene una rotación de aproximadamente 16 horas y posee cinco anillos débiles y satélites como Tritón.
Exoplanets are planets that orbit stars other than our sun. The Kepler space telescope discovered thousands of exoplanets since 2009. The first confirmed exoplanet, 51 Pegasi b, was discovered in 1995 orbiting a star similar to our sun. It is a gas giant that orbits very closely, allowing its orbit to be easily detected. Future missions like TESS, launching in 2018, aim to discover Earth-like exoplanets to search for life elsewhere. Direct imaging techniques are also being used to image exoplanets rather than detecting them through their star's wobble. Thousands of exoplanets have been found, but most so far are gas or ice giants, though some rocky planets exist, leaving the possibility of life unknown.
The document provides information about uniform circular motion and gravitation. It begins by defining uniform circular motion and describing it using polar coordinates and key terms like angular velocity and centripetal acceleration. It then discusses how centripetal force allows an object to travel in a circular path and maintains its speed. Finally, it introduces Newton's law of universal gravitation, defining gravitational force as directly proportional to the product of two masses and inversely proportional to the square of the distance between them.
The document discusses the density of states in two-dimensional systems. It explains that the density of states function describes the number of available energy states in a system and is essential for determining carrier concentrations and distributions. In semiconductors, carrier motion is limited to two, one, or zero spatial dimensions, requiring the density of states to be known in quantum wells (2D), quantum wires (1D), and quantum dots (0D). The document then focuses on the density of states in 2D systems, noting that it is independent of energy and depends on the number of quantized levels in the confined dimension.
La brújula es un instrumento que contiene una aguja imantada que flota en un líquido e indica el norte magnético, no el norte geográfico. La brújula se basa en el magnetismo terrestre y se usa principalmente junto con un mapa topográfico para orientarse y trazar itinerarios mediante la medición de rumbos y distancias.
IB Astrophysics - stellar radiation and types - Flippingphysics by nothingnerdyNothingnerdy
This document discusses stellar radiation and stellar classification. Stars are classified based on their temperature, which is determined from their blackbody spectrum. Hotter stars have shorter peak wavelengths and are classified as O, B, A types while cooler stars like K and M types have longer peak wavelengths. A star's luminosity and temperature are correlated on the Hertzsprung-Russell diagram, with the main sequence containing the bulk of stars.
Dokumen tersebut berisi solusi soal olimpiade astronomi tingkat provinsi tahun 2009 yang ditulis oleh Mariano N. Dokumen tersebut memberikan penjelasan singkat tentang latar belakang pendeklarasian tahun 2009 sebagai Tahun Astronomi Internasional dan solusi untuk beberapa soal olimpiade astronomi.
Dokumen tersebut membahas tentang konsep kemagnetan dan penerapannya dalam kehidupan sehari-hari. Terdapat penjelasan mengenai standar kompetensi, indikator pencapaian kompetensi, asal usul kemagnetan, pengelompokan magnet, sifat-sifat magnet, cara membuat dan menghilangkan sifat magnet, kemagnetan bumi, dan medan magnet di sekitar arus listrik.
Newton's universal law of gravitation states that every point mass in the universe attracts every other point mass with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The gravitational field strength is defined as the gravitational force per unit mass experienced by a small test mass in the field. Field lines illustrate the direction of acceleration due to gravity and indicate that the field strength is greater nearer the surface of spherical masses.
Semiconductor.pdf description ki last lin...KALPESH-JNV
Semiconductors (SC) are a class of materials that exhibit intermediate electrical conductivity between conductors (such as metals) & insulators (such as ceramics / plastics). They are used extensively in modern electronics, as the basis for the design & fabrication of transistors, diodes, integrated circuits.
The discovery of the SC properties dates back to the late 19th century, when experiments were carried out on the electrical conductivity of various materials. In 1874, Edwin Hall discovered the phenomenon of Hall effect, which led to the discovery of SC. The Hall effect occurs when a magnetic field is applied perpendicular to the flow of electric current in a conductor, resulting in a voltage difference across the conductor. This effect was found to be more pronounced in certain materials, such as Si & Ge, which led to further investigations into their electrical properties.
SC are characterized by their unique band structure, which determines their electrical conductivity. In an ideal SC crystal, the valence band (the highest occupied energy band) is separated from the conduction band (the lowest unoccupied energy band) by a bandgap. The bandgap is a measure of the energy required to move an electron from the valence band to the conduction band, and determines whether a material is a conductor, an insulator, or a SC.
At absolute zero temperature, all electrons in a SC crystal occupy the valence band, and there are no electrons in the conduction band. However, as the temperature increases, some of the electrons gain enough energy to jump across the bandgap and move to the conduction band, where they are free to move and conduct electricity. This process is called thermal excitation, and it is responsible for the temperature dependence of the electrical conductivity of SC.
SC can be classified into two main types based on their doping properties: intrinsic and extrinsic. Intrinsic SC are pure materials such as Si or Ge, which have no impurities or dopants added to them. Intrinsic SC have a relatively low electrical conductivity at room temperature due to the presence of the bandgap. Extrinsic SC, on the other hand, are doped with impurities to modify their electrical properties.
Doping is the process of intentionally introducing impurities (also called dopants) into a SC crystal to modify its electrical properties. The impurities can either donate or accept electrons, creating excess or deficient electrons, respectively, in the crystal lattice. This alters the band structure and conductivity of the SC, making it more useful for electronic applications.
Extrinsic SC can be further classified into two types: n-type and p-type. N-type SC are doped with impurities that have excess electrons (such as phosphorus)
Jane se phele niche vali video dekh lo (VERY IMP)
https://www.youtube.com/watch?v=V5qMCRAZTN8
This ppt is as per class 12 Maharashtra State Board's new syllabus w.e.f. 2020. Images are taken from Google public sources and Maharashtra state board textbook of physics. Gif(videos) from Giphy.com. Only intention behind uploading these ppts is to help state board's class 12 students understand physics concepts.
El campo magnético terrestre se extiende desde el núcleo interno de la Tierra hasta el límite con el viento solar y varía en magnitud de 25 a 65 μT en la superficie terrestre. Este campo magnético puede considerarse como el creado por un dipolo magnético inclinado 11 grados respecto al eje de rotación de la Tierra.
Cahaya merupakan gelombang elektromagnetik yang dapat dipantulkan, dibiaskan saat melewati medium dengan indeks bias yang berbeda, dan mengalami lenturan saat melewati celah sempit. Cahaya juga merambat lurus dalam satu garis.
Dokumen tersebut memberikan penjelasan singkat soal-soal olimpiade astronomi tingkat provinsi tahun 2010 beserta jawabannya. Dokumen tersebut memberikan informasi mengenai konsep-konsep dasar astronomi seperti gerhana, orbit planet, bintang variabel, dan lainnya.
Dokumen tersebut membahas tentang magnet dan kemagnetan. Magnet adalah benda yang dapat menarik bahan tertentu lainnya. Ada tiga jenis kemagnetan yaitu ferromagnetik, paramagnetik dan diamagnetik. Magnet memiliki dua kutub, utara dan selatan, yang memiliki sifat berlawanan menarik dan tolak. Magnet juga dapat menimbulkan medan magnetik di sekitarnya.
Dokumen tersebut membahas tentang fisika optika yang mencakup pemantulan cahaya, pembiasan cahaya, cermin datar, cermin cekung, cermin cembung, lensa cekung, lensa cembung, dan alat-alat optik seperti mata, kamera, teropong, dan mikroskop.
1) Constellations are groups of stars that appear to form patterns in the night sky, though the stars within a constellation are often very far apart in reality.
2) Many early cultures saw patterns among the stars and associated them with myths and stories from their traditions, with most modern constellations derived from Greek mythology.
3) While constellations shift positions in the sky throughout the night and seasons due to Earth's rotation, they have been used for navigation, to map the sky, and bring order to observations of space.
Neptuno es el séptimo planeta del Sistema Solar y el más lejano. Está compuesto principalmente de hidrógeno, helio y agua. Tiene una rotación de aproximadamente 16 horas y posee cinco anillos débiles y satélites como Tritón.
Exoplanets are planets that orbit stars other than our sun. The Kepler space telescope discovered thousands of exoplanets since 2009. The first confirmed exoplanet, 51 Pegasi b, was discovered in 1995 orbiting a star similar to our sun. It is a gas giant that orbits very closely, allowing its orbit to be easily detected. Future missions like TESS, launching in 2018, aim to discover Earth-like exoplanets to search for life elsewhere. Direct imaging techniques are also being used to image exoplanets rather than detecting them through their star's wobble. Thousands of exoplanets have been found, but most so far are gas or ice giants, though some rocky planets exist, leaving the possibility of life unknown.
The document provides information about uniform circular motion and gravitation. It begins by defining uniform circular motion and describing it using polar coordinates and key terms like angular velocity and centripetal acceleration. It then discusses how centripetal force allows an object to travel in a circular path and maintains its speed. Finally, it introduces Newton's law of universal gravitation, defining gravitational force as directly proportional to the product of two masses and inversely proportional to the square of the distance between them.
The document discusses the density of states in two-dimensional systems. It explains that the density of states function describes the number of available energy states in a system and is essential for determining carrier concentrations and distributions. In semiconductors, carrier motion is limited to two, one, or zero spatial dimensions, requiring the density of states to be known in quantum wells (2D), quantum wires (1D), and quantum dots (0D). The document then focuses on the density of states in 2D systems, noting that it is independent of energy and depends on the number of quantized levels in the confined dimension.
La brújula es un instrumento que contiene una aguja imantada que flota en un líquido e indica el norte magnético, no el norte geográfico. La brújula se basa en el magnetismo terrestre y se usa principalmente junto con un mapa topográfico para orientarse y trazar itinerarios mediante la medición de rumbos y distancias.
1. Il sestante e la
trigonometria
Liceo scientifico di Carsoli
Docente: Grazia Cotroni classe IV A
2. Problema
Se vogliamo conoscere l’altezza di un
lampione, di un albero o della nostra casa
o della nostra scuola senza poterla
misurare direttamente, come facciamo?
5. COME SI COSTRUISCE
Procedimento
Per costruire un sestante con materiale povero,
1) Abbiamo preso un’asta dritta e abbiamo posizionato al
centro di essa un goniometro, in modo da formare da
una parte un angolo di 180° e dall’altra un angolo di 0°
2) abbiamo preso un filo, lo abbiamo inserito nel buchino
del goniometro e abbiamo posto all’estremità del filo un
pesetto. (come nelle figure)
6. Come si usa?
• Si poggia il sestante su un treppiedi ad
un’altezza nota,
• si mira verso l’estremità dell’oggetto di cui
si vuole misurare l’altezza,
• quando il pesetto smette di oscillare si
guarda l’angolo indicato dal filo sul
goniometro, prendendo 90° come zero.
7. La matematica che c’è dietro
2° teorema sui triangoli rettangoli:
In un triangolo rettangolo un cateto è
uguale al prodotto tra l’altro cateto e
la tangente dell’angolo opposto al
cateto di partenza oppure uguale al
prodotto tra l’altro cateto e la
cotangente dell’angolo adiacente
all’angolo di partenza.
In formule
𝑎 = 𝑐 ∙ 𝑡𝑔𝛼
oppure
𝑎 = 𝑐 ∙ 𝑐𝑡𝑔𝛽
8. Un esempio di utilizzo
Misuriamo l’altezza
della nostra scuola
Ogni ragazzo
calcola con il
proprio sestante
l’angolo per
misurare l’altezza
della scuola
misure dell'angolo
28 media
38 31,75
37
34
30
24
28
45
29
29
29
30
ℎ = ℎ0 + 𝑑𝑡𝑔𝛼 = 1.38 𝑚 + 13,88 ∙ 𝑡𝑔 31,75 = 9,96 𝑚
9. E se siamo su una nave?
In questo caso il nostro sestante
non funziona!
A bordo di una nave, anche con il
mare più calmo, gli strumenti
terrestri per la misura della
posizione di un astro in cielo
funzionano male, perché non c'è
nulla di veramente stabile da
usare come riferimento, filo a
piombo e livella oscillano
continuamente attorno ad
un'irraggiungibile posizione di
equilibrio.
10. E se siamo su una nave in mare aperto di notte?
Durante la notte le
stelle si muovono tutte
in senso antiorario
(verso considerato
positivo per gli angoli)
eccetto la stella polare.
(o laCroce del Sud
nell’altro emisfero).
Perchè?
12. Ma conoscere il nord non basta. Perché?
Non basta guardare la stella polare o seguire una bussola, perché i venti e le
correnti possono farci cambiare rotta senza che noi ce ne accorgiamo.
Quindi cosa occorre?
13. L'unico riferimento stabile è l'orizzonte marino che viene utilizzato dal
sestante. Esso rappresenta il punto di arrivo dell'evoluzione degli strumenti
utilizzati in mare.
Lo strumento permette di misurare l'angolo di cui deve essere ruotato uno
specchio mobile affinché la luce proveniente dall'astro risulti, dopo una doppia
riflessione, tangente all'orizzonte marino. In pratica basta puntare il mare in
lontananza, là dove sembra toccare il cielo e, ruotando la parte mobile dello
strumento, portare sull'orizzonte la stella o il disco solare o lunare.
15. Perché si chiama «sestante»
La scala di un sestante è di 60°,
pari ad 1/6 di circonferenza; è da
qui che deriva il suo nome.
16. un App per il nostro cellulare…
Grazie a Smart Measure potremo utilizzare la fotocamera
dei nostri dispositivi Android per calcolare la distanza di
un determinato oggetto e, fatto ciò, anche la sua
altezza! Il programma è disponibile sia in versione free
che a pagamento. La versione gratuita permetterà di
misurare solo l’altezza e la distanza dell’oggetto che
stiamo inquadrando con la fotocamera.
19. Alla fine di questa attività
I ragazzi coinvolti scrivono:
• «Prima della realizzazione e dell’introduzione di tale strumento, nessuno nella mia classe era
consapevole del fatto che ,utilizzando soltanto un’asta, un goniometro, un filo e un pesetto, si
potesse realizzare uno strumento che in modo così semplice possa permetterci la misurazione di
altezze elevate.»
• È stato un metodo molto utile per riuscire a vedere la matematica da un’altra prospettiva più
vivace e non solo come una materia del tutto teorica
• Questo esperimento di costruzione e di utilizzo di un sestante artigianale ci dà un esempio di uso
pratico della matematica e quindi ci permette di dare una risposta concreta alla fatidica domanda
«a cosa serve la matematica?». Nel caso del sestante nonostante sia un’invenzione di secoli fa
rimane tutt’oggi uno strumento di grande utilità perché permette di fare calcoli e misurazioni
senza l’uso di elettricità e strumenti tecnologici
• Prima della realizzazione e dell’introduzione di tale strumento, nessuno nella mia classe era
consapevole del fatto che, utilizzando soltanto un’asta, un goniometrico un filo e un pesetto, si
potesse utilizzare uno strumento che in modo così semplice possa permetterci la misurazione di
altezze elevate.
• Questo esperimento è stato molto utile e ci ha permesso di tornare indietro nel tempo dove con
un clic non potevi ricevere una risposta a tutto, questo ci ha spinto a ragionare.