
babak penyisihan
Authored by Gita adriana
Physics
6th - 8th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
gas helium dengan volume 6x10-2 m3 dinaikkan volumenya menjadi 5 kali lipat pada keadaan isobarik. usaha luar yang dilakukan gas pada sistem sebesar 4x105 J. maka besar tekanan gas adalah...
a. 17,21 x 105 N/m2
b. 18,11 x 105 N/m2
c. 12,63 x 105 N/m2
d. 16,67x105 N/m2
e. 17,17x105 N/m2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada termodinamika, gas ideal mengalami proses isotermik jika
a. perubahan keadaan gas suhunya selalu tetap
b. semua molekul bergerak dengan kecepatan berbeda
c. semua keadaan gas suhunya selalu berubah
d. pada suhu tinggi kecepatan molekulnya lebih tinggi
e. tekanan dan volume gas tidak mengalami perubahan
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
perhatikan gambar dibawah ini.
a. isokhorik
b. isobaris
c. isotermik
d. adiabatik
e. siklus tertutup
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sebuah mesin panas menyerap panas 250 J dari tandom panas, kemudian melakukan usaha dan membuang 150 J panas ke tandom dingin. Berapakah efisiensi mesin
a. 10%
b. 15%
c. 20%
d. 25%
e. 30%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
suatu gas dalam ruang tertutup melepaskan kalor ke lingkungan sebesar 1000 kalori dan melakukan usaha 2000 J. berapakah perubahan energi dalam gas jika (1 kalori = 4,2 J)..
a. 6200 J
b. -6200 J
c. 7600 J
d. -7500 J
e.- 7600
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