Pressure
Muhtasari
A sharp knife slices easily while a blunt one tears, a camel crosses soft sand on its broad feet, and a deep-sea diver feels the water squeeze harder the deeper they go. All three are about pressure: how a force is shared over an area, and how a liquid presses on whatever is beneath its surface.
In this topic you will define pressure, use the equation linking force and area, and explain everyday examples where changing the area changes the effect of a force. You will then look beneath a liquid surface, see qualitatively how pressure grows with depth and density, and use the Supplement equation for the change in pressure in a liquid.
Malengo
- Define pressure as force per unit area; recall and use the equation F p = A
- Describe how pressure varies with force and area in the context of everyday examples
- Describe, qualitatively, how the pressure beneath the surface of a liquid changes with depth and density of the liquid
- [Supplement] Recall and use the equation for the change in pressure beneath the surface of a liquid ∆p = ρg∆h
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Pressure. 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.
- A force of 40 N acts on an area of 0.5 m^2. The pressure is: A. 20 Pa B. 80 Pa C. 0.0125 Pa D. 40 Pa Answer: B
- The SI unit of pressure is the: A. newton B. joule C. pascal D. watt Answer: C
- Pressure beneath a liquid surface increases with: A. depth and density B. width of container only C. surface area only D. colour of the liquid Answer: A
- A diver is 10 m deep in water of density 1000 kg/m^3 (g = 9.8 N/kg). The increase in pressure is: A. 980 Pa B. 9800 Pa C. 98000 Pa D. 100 Pa Answer: C
- Why does a sharp knife cut more easily than a blunt one? A. it has more mass B. its small edge area gives higher pressure C. it is heavier D. it has lower density Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
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
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Pressure? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
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