會合週期
Authored by 光正 王
Science
9th - 12th Grade
Used 15+ times
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6 questions
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1.
FILL IN THE BLANK QUESTION
3 mins • 2 pts
參考附圖，某行星系統中，甲、乙兩行星繞中央恆星運行的週期分別是80天和120天(地球日)，請問甲星每日繞行的圓心角是 ？ 度。
Answer explanation
360÷80=4.5
2.
FILL IN THE BLANK QUESTION
3 mins • 2 pts
參考附圖，某行星系統中，甲、乙兩行星繞中央恆星運行的週期分別是80天和120天，請問乙星每日繞行的圓心角比甲星每日繞行的圓心角少 ? 度。
Answer explanation
甲每日繞行4.5度，乙每日繞行3度，故乙日繞行比甲少1.5度
3.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
參考附圖，某行星系統中，甲、乙兩行星繞中央恆星運行的週期分別是80天和120天，承上題內容，請問乙星繞行的圓心角比甲星至少要少 ? 度時，甲星和乙星都會回到圖中同一位置。
120
240
360
480
Answer explanation
甲繞回同一位置時，乙星落後80x1.5=120度，甲再繞一圈回同一位置時乙星落後120x2度，甲繼續再繞一圈，乙星落後360度，但剛好與甲星都回到同一位置。
4.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
參考附圖，某行星系統中，甲、乙兩行星繞中央恆星運行的週期分別是80天和120天，承上題內容，請問至少要 ? 天，甲星和乙星都會回到圖中同一位置，此天數即為兩星的會合週期。
200
240
360
400
5.
MULTIPLE CHOICE QUESTION
15 mins • 2 pts
附圖中假若甲星為金星，乙星為地球，而金星的會合週期為583.9 天(地球日)，亦即由地球看金星位於遠方某星座上，下次再見此現象需經583.9 天(地球日)，試計算金星的公轉週期為 ？ 天(地球日)?（地球公轉週期以365天計算）
224.2
224.6
225.0
225.2
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
參考附圖，某行星系統中，甲、乙兩行星繞中央恆星運行的週期分別是80天和120天(地球日)，若乙星與中央恆星的距離為R，請問甲星與中央恆星的距離約為 ？ R。
0.62
0.68
0.76
0.84
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