
Hanner oes
Authored by Thomas Nelson
Physics
10th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pa fath o niwclews sydd yn rhyddhau ymbelydredd?
Ansefydlog
Sefydlog
Bach
Llydan
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mae dadfeiliad ymbelydrol yn digwydd:
Yn aml
Ar hap
Yn araf
Yn rheolaidd
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hanner oes yw'r amser mae'n cymryd i hanner y niwclysau ymbelydrol i _________
Ymbelydredd
Tyfu
Dadfeilio
Troi'n ansefydlog
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
"Mae hanner oesau yn gallu amrywio o eiliadau i filoedd o flynyddoedd." Ydy hyn yn wir?
Ydy
Nac ydy
Weithiau
Sai'n siwr
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Actifedd yw y nifer o niwclysau sy'n dadfeilio
Pob un eiliad
Pob un munud
Pob un awr
Pob un blwyddyn
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unedau mesur actifedd yw:
Becamelau (Bl)
Hertz (Hz)
Hurts (Hs)
Becquerelau (Bq)
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Mae hanner oes isotop ymbelydrol yn 27 mlynedd. Pa mor hir fydd ei fàs yn ei gymryd i leihau o 2g i 0.5g?
27 mlynedd
54 mlynedd
81 mlynedd
13.5 mlynedd
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