Density
Muhtasari
Lead is called heavy and cork is called light, yet a tiny lead pellet weighs far less than a whole cork life-ring. What we really mean is that lead packs much more mass into each unit of volume. That idea, mass per unit volume, is density, and it lets you predict whether a pebble sinks, why an iron ship floats, and which liquid settles on top when two will not mix.
In this lesson you will define density, learn the equation that links mass, volume and density, and measure it for a liquid, a regular solid and an awkward irregular solid using displacement. You will then use density data the way examiners ask: to decide whether an object floats or sinks, and whether one liquid floats on another.
Malengo
- Define density as mass per unit volume; recall and use the equation m ρ = V
- Describe how to determine the density of a liquid, of a regularly shaped solid and of an irregularly shaped solid which sinks in a liquid (volume by displacement), including appropriate calculations
- Determine whether an object floats based on density data
- [Supplement] Determine whether one liquid will float on another liquid based on density data given that the liquids do not mix
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 Density. 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.
- Density is defined as A. mass times volume B. mass divided by volume C. volume divided by mass D. weight divided by area Answer: B
- A block has mass 240 g and volume 30 cm3. Its density is A. 0.125 g/cm3 B. 8 g/cm3 C. 80 g/cm3 D. 7200 g/cm3 Answer: B
- A stone of mass 75 g raises the water in a measuring cylinder from 40 cm3 to 65 cm3. Its density is A. 1.15 g/cm3 B. 3.0 g/cm3 C. 1.88 g/cm3 D. 25 g/cm3 Answer: B
- An object will float in a liquid if the object's density is A. greater than the liquid's density B. equal to its own weight C. less than the liquid's density D. equal to the liquid's mass Answer: C
- The density of water is 1.0 g/cm3. In kg/m3 this is A. 0.001 B. 1 C. 100 D. 1000 Answer: D
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 Density? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
