Physics: Astrophysics: Units
Muhtasari
Astrophysics uses exactly the same units as the rest of mechanics, but stretched to sizes that no laboratory ever meets. The Sun is a hundred and fifty thousand million metres away, a year is thirty million seconds long, and gravitational field strength changes completely depending on which world you happen to be standing on.
This lesson covers the kilogram, metre, second, metre per second, metre per second squared, newton and newton per kilogram as they are used in astronomy. You will practise standard form, convert astronomical times and distances into SI units, and use unit checks to catch the sort of error that a very large number hides well.
Malengo
- Use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s), newton/kilogram (N/kg)
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Physics: Astrophysics: Units. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- The SI unit of gravitational field strength is the: A) Newton B) Newton per kilogram C) Kilogram per newton D) Metre per second Answer: B
- The distance 384 000 km written in metres in standard form is: A) 3.84 x 10^5 m B) 3.84 x 10^6 m C) 3.84 x 10^8 m D) 3.84 x 10^11 m Answer: C
- A light-year is a unit of: A) Time B) Distance C) Speed D) Brightness Answer: B
- An astronaut of mass 80 kg stands on a moon where g is 2.0 N/kg. Her weight there is: A) 40 N B) 80 N C) 160 N D) 784 N Answer: C
- Approximately how many seconds are there in one year? A) 3.15 x 10^5 s B) 3.15 x 10^6 s C) 3.15 x 10^7 s D) 3.15 x 10^9 s Answer: C
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
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Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Physics: Astrophysics: Units? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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