Kuwanda kwevanhu - matambudziko nemhinduro

Kuwanda kwevanhu - matambudziko nemhinduro

1. Vhoriyamu yechinhu i8 cm ³ uye huremu hwechinhu i84 magiramu. Kuwanda kwechinhu chacho chii?

Zvinozivikanwa:

Vhoriyamu (V) = 8 cm ³

Huremu (m) = magiramu makumi maviri

Zvinodiwa: kuwanda (ρ)

Solution:

ρ = m / V = ​​​​84 magiramu / 8 cm ³ = 10.5 magiramu/cm ³

2. Vhoriyamu yebhokisi i5 cm ^3. Kana huwandu hwebhokisi iri 250 g/cm ³ , huremu hwebhokisi hupi?

Zvinozivikanwa:

Vhoriyamu (V) = 5 cm ³

Kuwanda (ρ) = 250 g/ ^cm3

Zvinodiwa: Huremu hwebhuroko

Solution:

ρ = m / V

ρ = kuwanda, V = vhoriyamu, m = uremu

Huremu hwebhuroko:

m = ρ V = (250 g/cm ³ )(5 cm ³ ) = 1250 magiramu

3. Vhoriyamu yemvura i35 cm ³ uye huremu hwemvura i60 magiramu, huwandu hwemvura hwakaita sei?

Zvinozivikanwa:

Huwandu hwemvura (V) = 35 cm ³

Huremu hwemvura (m) = magiramu makumi matanhatu

Zvinodiwa: kuwanda (ρ)

Solution:

kuwanda kwevanhu:

ρ = m / V = ​​​​60/35 = 1.71 magiramu/cm ³

4. Huremu hwesimbi hunosvika magiramu zana nemakumi maviri uye vhoriyamu yesimbi hunosvika 60 cm ^3. Huremu hwesimbi hwakaita sei?

Zvinozivikanwa:

Huremu (m) = magiramu makumi maviri

Vhoriyamu (V) = 60 cm ³

Zvinodiwa: kuwanda

Solution:

ρ = m / V

ρ = 120 magiramu / 60 cm ³

ρ = 2 magiramu/ ^cm3

5.

Zvichibva patafura, chinhu chine density yakafanana ndicho…

Solution:

Fomura yekuwanda kwehuwandu:

ρ = m / V

ρ = kuwanda, m = uremu, V = vhoriyamu

6. Zvichibva pamufananidzo uri pazasi, kana huremu hwechinhu huri magiramu mazana matatu, huwandu hwechinhu chacho hunosvika papi?

Zvinozivikanwa:

Huremu (m) = magiramu makumi maviri

Vhoriyamu (V) = vhoriyamu yemvura yakadururwa = 20 cm ³

Zvinodiwa: kuwanda

Solution:

ρ = m / V = ​​​​300 magiramu / 20 cm ³ = 15 magiramu/cm ³

7. Huremu hwechinhu hunosvika magiramu mazana matatu negumi nematanhatu, hwakaiswa mumudziyo sezvakaratidzwa pamufananidzo. Huremu hwechinhu chacho hwakaita sei?

Zvinozivikanwa:

Huremu (m) = magiramu makumi maviri

Vhoriyamu (V) = vhoriyamu yemvura yakadururwa = 40 ml

Zvinodiwa: kuwanda

Solution:

Huremu = 316 magiramu = 316/1000 kg = 0.316 kg

Vhoriyamu = 40 ml = 40/1000 marita = 4/100 marita = 0.04 marita

1 litre = 1 dm ³ = 1/1000 m ³ = 0.001 m ³

0.04 marita = (0.04)(0.001) m ³ = 0.00004 m ³

Kuwanda:

ρ = m / V = ​​0.316 kg / 0.00004 m ³ = 316 kg / 0.04 m ³ = 7900 kg/m ³

8.

Kuwanda kwematombo zvichibva pamufananidzo ndekwekuti…

Zvinozivikanwa:

Huremu (m) = magiramu zana + magiramu makumi maviri = magiramu zana nemakumi maviri = 120 / 1000 makirogiramu = 0.120 makirogiramu

Vhoriyamu (V) = 80 ml – 60 ml = 20 ml = 20 / 1000 marita = 2/100 marita = 0.02 marita

1 litre = 1 dm ³ = 1/1000 m ³ = 0.001 m ³

0.02 marita = 0.02 x 0.001 m ³ = 0.00002 m ³

Zvinodiwa: kuwanda

Solution:

Kuwanda:

ρ = m / V = ​​0.120 kg / 0.00002 m ³ = 120 kg / 0.02 m ³ = 6000 kg/m ³

1. Chii chinonzi kuwanda kwevanhu?
   • mhinduro: Kuwanda kwehuwandu hwe ... Kuwanda = Huremu / VhoriyamuDensity=vhorumuMisa​.
2. Kuwanda kwechinhu kunoenderana sei nekukwanisa kwacho kuyangarara kana kunyura mumvura?
   • mhinduro: Zvinhu zvine huwandu hwakakura kupfuura mvura zvichanyura, nepo zvinhu zvine huwandu hushoma pane mvura zvichayangarara.
3. Sei zvimwe zvinhu zvinoita sezvikuru, zvakaita sengarava hombe, zvichiyangarara mumvura?
   • mhinduro: Zvese zvine chekuita nehuwandu hwakabviswa. Ngarava, kunyange zvazvo ichirema, ine chimiro chinobvisa huwandu hwakawanda hwemvura. Kana huremu hwemvura yakabviswa hwakakura kupfuura kana kuti hwakaenzana nehuremu hwengarava, ngarava ichayangarara.
4. Tembiricha inowanzo kanganisa sei kuwanda kwechinhu?
   • mhinduro: Kazhinji, sezvo tembiricha ichiwedzera, huwandu hwechinhu hunoderera nekuti mamorekuru anofamba zvakanyanya uye anowanzo gara huwandu hwakakura. Kune zvimwe zvisingawanzoitiki, zvakaita sekuwedzera kusingawanzoitiki kwemvura pasi pe4°C.
5. Chii chinorehwa nehuwandu hwemvura 1 g / cm³?
   • mhinduro: Kuwanda kwehuwandu hwe 1g / cm³ nekuti mvura ndiyo nzira iri nyore yekushandisa. Zvinhu zvine huremu hwakakura kupfuura uhwu zvinonyura mumvura, asi izvo zvine huremu hushoma zvinoyangarara.
6. Sei zvinhu zviviri zvingava nehuremu hwakafanana asi huremu hwakasiyana?
   • mhinduro: Zvinhu zviviri izvi zvinogona kugadzirwa nezvinhu zvakasiyana (uye nekudaro zvine maatomu akasiyana kana kuti mamorekuru) kana kuti zvinogona kuva nemavhoriyamu akasiyana. Chinhu chine vhoriyamu yakakura uye huremu hwakafanana nehwechinhu chidiki chichava nehuremu hwakaderera.
7. Kudzvanya gasi kunokanganisa sei kuwanda kwaro?
   • mhinduro: Kudzvanya gasi kunoderedza huwandu hwaro. Sezvo huremu hwaro huchiramba hwakafanana, kuderedza huwandu hwegasi kunowedzera huwandu hwegasi.
8. Sei dzimwe simbi dzinorema, dzakadai semutobvu, dzichinzwa "dzichirema" kupfuura dzimwe dzine saizi imwe chete?
   • mhinduro: "Kurema" kwaunonzwa ndiko kuwanda kwesimbi. Lead ine kuwanda kwakanyanya kupfuura dzimwe simbi dzakawanda, saka chidimbu chelead chinorema kupfuura chimwe simbi chine huwandu hwakafanana.
9. Chinhu chingava sei chakaoma kupfuura mvura asi chisinganyuri pakarepo kana chaiswa pamusoro pemvura yacho?
   • mhinduro: Dzimwe nguva kusimba kwenzvimbo kunogona kutsigira zvinhu zvakawandisa kupfuura mvura, kunyanya kana chinhu chacho chiri chidiki kana kuti chine chimiro chinogona "kuvharwa" nepamusoro pemvura. Zvisinei, nekufamba kwenguva, kana huwandu hwechinhu chacho hwakakura, chingangonyura.
10. Ko huwandu hwechinhu chakafanana hunogona kusiyana here panzvimbo dzakasiyana mukati mechinhu chacho?

• mhinduroKwete. Pachinhu chakafanana, huwandu hwezvinhu hwakaenzana, zvichireva kuti hune kukosha kwakafanana panzvimbo imwe neimwe iri mukati mechinhu chacho.