Lihlooho tsa fisiks tse buang ka liketsahalo tsa tlhaho jj. tse amanang le fisiks.
1. Hlokomela karabelo e latelang ea ho kopanya ha nyutlelie:
1H2 + 1H3 → 2He4 + 0n1 +E
Haeba boima 1H2 = 2,014 amu, boima 1H3 = 3,016 amu, boima ba karoloana ea α = 4,0026 amu le boima ba neutron = 1,0084 amu, joale matla a hlahisoang ke…. (amu e le 'ngoe e lekana le 931 MeV)
A. 18,62 MeV
B. 17,69 MeV
C. 16,76 MeV
D. 15,73 MeV
E. 14,89 MeV
Puisano
Mehlala e 4 ea lipotso tse itseng tsa mocheso le bokhoni ba mocheso
1. Ke eng e futhumatsang kapele ha e omiswa hammoho letsatsing le chesang, aluminium kapa koporo? Mocheso o ikgethang wa aluminium = 900 J/kg o C mme mocheso o ikgethang wa koporo = 390 J/kg o C.
Puisano
Ha mocheso o itseng wa ntho o le moholo, ho nka nako e telele hore ntho e futhumale, ka lehlakoreng le leng, ha mocheso o itseng wa ntho o le monyane, o futhumala kapele.
Mocheso o itseng oa koporo o monyane ho feta mocheso o itseng oa aluminium, ka hona koporo e chesa kapele.
1. Thine e boima ba lik'hilograma tse 2 e na le mocheso o itseng oa 130 J.kg -1 C -1 . Palo ea mocheso o monngoang ke thine ho phahamisa mocheso oa eona ho tloha ho 50 o C ho isa ho 100 o C ke….
Puisano
Hoa tsebahala hore:
Boima (m) = 2 kg
Mocheso o itseng oa thini (c) = 130 J.kg -1 C -1
Phetoho ea mocheso (Δ T) = 100 o C – 50 o C = 50 o C
Mehlala e 5 ea lipotso tsa katoloso ea molumo
1. Bolo e tiileng e entsoe ka aluminium ka karolelano ea katoloso e otlolohileng ea 24 x 10 -6 o C -1 . Haeba mochesong oa 30 o C bophahamo ba bolo e le 30 cm 3 , joale e le hore bophahamo ba bolo bo eketsehe ho fihlela ho 30,5 cm 3, bolo e tlameha ho futhumatsoa mochesong oa….. o C
Puisano
Hoa tsebahala hore:
Koefficient ea katoloso e otlolohileng (α ) = 24 x 10 -6 o C -1
Koefficient ea katoloso ea molumo (γ ) = 3 a = 3 x 24 x 10 -6 o C -1 = 72 x 10 -6 o C -1
3 Mehlala ea lipotso mabapi le katoloso ea sebaka
1. Leqephe la tšepe mochesong oa 20 o C le bolelele ba 50 cm le bophara ba 30 cm. Haeba coefficient ea katoloso e otlolohileng ea tšepe e le 10 -5 o C -1 joale keketseho ea sebaka le sebaka sohle mochesong oa 60 o C ke….
Puisano
Hoa tsebahala hore:
Mocheso oa pele (T 1 ) = 20 o C
Mocheso oa ho qetela (T 2 ) = 60 o C
Phetoho ea mocheso (Δ T) = 60 o C – 20 o C = 40 o C
Sebaka sa qalong (A 1 ) = Bolelele x bophara = 50 cm x 30 cm = 1500 cm 2
Koefficient ea katoloso e otlolohileng ea tšepe (α ) = 10 -5 o C -1
Mehlala e 6 ea Lipotso tsa Mohlala oa Atomo
1. Phapang pakeng tsa mehlala ea athomo ho ea ka Rutherford le Bohr ke…..
Puisano
Mehlala e 5 ea lipotso mabapi le katoloso ea bolelele
1. Setene sa tšepe mochesong oa likhato tse 20oC e bolelele ba 40 cm. Coefficient ea katoloso e otlolohileng ea tšepe ke 10-5 oC-1Keketseho ea bolelele ba tšepe le bolelele ba ho qetela ba tšepe ho suhu 70oC ke…..
Puisano
Hoa tsebahala hore:
Keketseho ea mocheso (ΔT) = 70oC - 20oEA-50-CoC
Bolelele ba qalong (L)1) = 40 cm
Koefficient ea katoloso e otlolohileng ea tšepe (a) = 10-5 oC-1
O botsitse: Keketseho ea bolelele (ΔL) le bolelele ba ho qetela (L)2)
Karabo:
a) Keketseho ea bolelele (ΔL)
ΔL = α L1 ΔT
ΔL = (10-5 oC-1)(40 cm)(50oC)
ΔL = (10-5)(2 x 103) cm
ΔL = 2 x 10-2 cm
ΔL = 2/102 cm
ΔL = 2 / 100 cm
ΔL = 0,02 cm
1. 50oC = ….. oF?
Puisano
Khatellong ea moea ea sepakapaka se le seng, mocheso oa ntlha ea leqhoa bakeng sa thermometer ea Celsius ke 0oC, athe thermometer Sekala sa Fahrenheit ke 32oF. Khatellong ea moea ea sepakapaka se le seng, mocheso oa ntlha ea mouoane bakeng sa thermometer ea Celsius ke 100oC, ha thermometer ea sekala sa Fahrenheit e le 212oF.
Kahoo 0oEA-32-CoF le 100oEA-212-CoF.
Sekaleng sa Celsius, ho na le likhato tse 100 pakeng tsa 0 ° C le 100 ° C. Sekaleng sa Fahrenheit, ho na le likhato tse 180 pakeng tsa 32 ° F le 212 ° F. Ho fumana mocheso oa Fahrenheit (T ° F), qala ka ho atisa mocheso oa Celsius (T ° C) ka 9/5 ebe u eketsa likhato tse 32.
Mehlala e 3 ea lipotso tsa ho lekanya thermometer
1. Phaephe ea khalase e se nang sekala e nang le joala e lokela ho sebelisoa thermometerBophahamo ba kholomo ea joala ha karolo e ka tlase ea phaephe ea khalase e kenngoa ka har'a leqhoa le qhibilihisitsoeng ke 5 cm 'me bophahamo ba kholomo ea joala ha karolo e ka tlase ea phaephe ea khalase e kenngoa ka metsing a belang ke 25 cm. Ha e sebelisoa ho lekanya mocheso oa metsi, bophahamo ba kholomo ea joala ke 15 cm. Suhu metsi ke….. oC
Puisano
1. Sheba setshwantsho se latelang sa potoloho ya motlakase. Boholo ba motlakase o phallang ka hara resistor ya 8 Ohm ke….
A. 1,8 Li-ampere
B. 1,2 Ampere
C. 0,8 Ampere
D. 0,6 Ampere
Puisano