ASTRONOMY OSK 2019
Quiz
•
Physics
•
10th Grade
•
Practice Problem
•
Hard
Ririn Wijiastuti
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11 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Bagi pengamat di dekat ekuator, kedudukan titik Aries tertinggi saat Matahari terbenam akan berlangsung pada…
21 Maret
21 Juni
22 Desember
21 Juni
25 September
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Andaikan orbit Matahari mengelilingi pusat Galaksi Bima Sakti berbentuk lingkaran. Jarak Matahari ke pusat Galaksi adalah 2×109 sa. Jika waktu yang diperlukan Matahari untuk satu kali mengelilingi pusat Galaksi adalah 200 juta tahun, serta dengan mengabaikan pengaruh dari materi gelap/dark matter, maka massa Galaksi yang terkandung di dalam orbit Matahari yang dinyatakan dalam M adalah
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Sebuah lensa konvergen dengan panjang fokus f untuk membuat bayangan dari sebuah objek yang berjarak 10 m dari lensa. Bayangan yang terbentuk berada pada jarak 10 cm. Berapakah f dalam cm?
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Assuming constant luminosity of the Sun for about 10 billion years since zero age main sequence, the percentage of the solar mass which was converted to energy through fusion reaction in its core during that time is
0, 02 %
0.2 %
0, 07 %
0, 7 %
0, 34 %
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Nilai x dari persamaan berikut (ax)2 explna - 1 adalah
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Terdapat tiga titik P(1,1,1), Q(2,3,4), dan R(5,6,7) yang membentuk sebuah bidang. Jika terdapat titik S(-2,5,10), maka jarak minimum titik S ke bidang PQR adalah
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Terdapat dua vektor gaya→− F 1 = 10(ˆ i,2ˆ j,3ˆ k) N dan→− F 2 = 5(ˆ i,3ˆ j,5ˆ k) N yang bekerja pada suatu benda. Hal ini mengakibatkan benda berpindah dengan vektor perpindahan →− r = (10ˆ i,10ˆ j,5ˆ k) m. Usaha yang dilakukan gaya tersebut, dalam satuan Nm, adalah
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