
kuis pertemuan 3
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
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%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu mesin memiliki suhu reservoir tinggi 400°C dan suhu reservoir rendah 70°C. Berapakah efisiensi mesin tersebut...
a. 49%
b. 58%
c. 69%
d. 100%
e. 110%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Suatu gas dalam ruang tertutup melepaskan kalor ke lingkungan sebesar 1000 kalori dan melakukan usaha 2000 Joule. 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 J
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
sebuah mesin kalor memerlukan kerja 400 J dalam siklusnya memiliki efisiensi 25% energi yang di ambil oleh reservoir panas adalah
a. 1200 J
b. 1300 J
c. 1400 J
d. 1500 J
e. 1600 J
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
jika sebuah mesin yang memiliki efisiensi terbesar 25% dalam operasinya membuang sebagian kalor ke tandom dingin yang bertempur 0°C maka tandom panasnya bertemperatur..
a. 76°C
b. 91°C
c. 170°C
d. 100°C
e. 354°C
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