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Larutan nikel(II) sulfat dielektrolisis dengan arus searah sebesar 1,93 A. Jika pada katoda diendapkan logam nikel sebesar 0,58 gram, maka waktu yang diperlukan untuk proses tersebut adalah …. (Ar Ni = 58, dan 1 F = 96.500C)
A. 200 detik
B. 500 detik
C. 1000 detik
D. 1.930 detik
E. 9.650 detik
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PTS 1 Ganjil PKn SD Kelas 3 › Lihat soalBerani karena benar ,adalah arti dari ….
A. Bendera merah Putih
B. Bhinneka tunggal Ika
C. Pancasila
D. Tri Darma
Ujian Semester 1 (UAS) Bahasa Inggris SMP /MTs Kelas 9 › Lihat soal
Dolphins
Dolphins are sea-mammals.
They have to breathe air or they will die. They are members of the Delphinidae family. Dolphins have smooth skin. Only baby dolphins are born with a few bristly hairs on their snouts. The hairs soon fall out. They have a long tail and the fin on the top of their backs keeps the dolphin from rolling over. The female dolphins have a thick layer of fat under their skin to keep them warm when they dive very deep. The dolphin’s front fins are called flippers. They use them to turn left and right. Dolphins grow from 2 to 3 meters long and weigh up to 75 kilograms.
Dolphins hunt together in a group. A group of dolphins is called a pod. They eat fish, shrimps and small squid. They live in salt water oceans. Dolphins can hold their breath for six minutes.
When dolphins hear or see a ship close by they go near it and follow it from many kilometers. Dolphins can leap out of the water and do some somersaults. Sometimes they invent their own tricks and stunts after watching other dolphins perform.
Dolphins are very friendly to people and have never harmed anyone. They are very playful animals.
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What is the purpose of the text above?
a. To show how to be friend with dolphins.
b. To describe particular dolphins.
c. To tell about one’s experience with dolphins.
d. To explain dolphins in general.
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