Physical Quantities And Measurement Techniques
Bayani Gaba-gaba
Every number in physics is only as good as the measurement behind it. Before you can talk about speed, force or energy, you have to be able to measure length, volume and time reliably, and know whether a quantity carries a direction or not. This is the toolkit the whole subject is built on.
In this lesson you will choose the right instrument for a length, a volume and a time interval, use a clever multiple-measurement trick to pin down a tiny distance or a short time accurately, and sort quantities into scalars and vectors. You will also learn to combine two vectors at right angles, a skill examiners test again and again.
Manufura
- Describe the use of rulers and measuring cylinders to find a length or a volume
- Describe how to measure a variety of time intervals using clocks and digital timers
- Determine an average value for a small distance and for a short interval of time by measuring multiples (including the period of oscillation of a pendulum)
- [Supplement] Understand that a scalar quantity has magnitude (size) only and that a vector quantity has magnitude and direction
- [Supplement] Know that the following quantities are scalars: distance, speed, time, mass, energy and temperature
- [Supplement] Know that the following quantities are vectors: force, weight, velocity, acceleration, momentum, electric field strength and gravitational field strength
- [Supplement] Determine, by calculation or graphically, the resultant of two vectors at right angles, limited to forces or velocities only
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Taswirar tunani
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Katunan tunawa
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Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Physical Quantities And Measurement Techniques. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which instrument is most suitable for measuring the volume of a liquid? A. metre rule B. measuring cylinder C. stopwatch D. balance Answer: B
- A student times 20 swings of a pendulum as 24.0 s. The period is: A. 24.0 s B. 4.8 s C. 1.2 s D. 0.83 s Answer: C
- Which of these is a vector quantity? A. mass B. temperature C. velocity D. energy Answer: C
- Forces of 6 N and 8 N act at right angles on a point. The resultant is: A. 2 N B. 10 N C. 14 N D. 48 N Answer: B
- Timing many swings instead of one mainly improves the measurement by: A. increasing the period B. removing parallax C. sharing the reaction-time error over many swings D. changing the pendulum length Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Relative Motion, Distance, and Displacement
Describe motion in different reference frames
"Physics: Relative Motion, Distance, and Displacement" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/2-1-relative-motion-distance-and-displacement. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Sashen littafi
Measurements
Explain the process of measurement
"Chemistry: Measurements" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/1-4-measurements. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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