September 2018 1 88 Report
Termasuk reaksi rduksi atau oksidasikah perubahan berikut?
a. MnO _{4} - -------> Mn ^{2} ^{+}
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Sebuah pegas di gantungi beban bermasa 50 g. Saat digetarkan dapat terjadi getaran dengan frekuensin 36 hz. Frekuensi ertarannya jika bebannya diganti dengan benda bermassa 200 g adalah...
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Rewrite the sentences below using the verb in the brackets into a correct sentence! 1. We will have dinner. (let) 2. I will go home in the night. (dare) 3. We feel uncomfortable because of the wather. (make) 4. Could you lift this table with me? (help) 5. The guest jumped backwards because of the loud noise. (make) 6. They won’t allow you to go home early. ( let) 7. She cried because of the sad film. (make) 8. Nobody is talking in the room. (dare) 9. He didn’t allow me to read her letter. (let) 10. Everybody must clean up the room together with the committee. (help)
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Read the text and find the meaning of the bold type words. Then, answer the following questions! Zebras are among the most beautiful animals on earth. With their bold black-and-white setripes, they stand apart form other African animals. They roam freely over the large African plains. Many people don’t know it, but the zebra is one of the few wild horses left in the world today. All horses belong to the same animal group, known as Equus. Zebra are shorter than most other horses, their ears are larger, and same of them make a barking sound! Most importantly, only zebras have stripes-even their manes are striped! Many zebrasave been killed for their beautiful skins. Fortunately, things are being done to protect zebras now. African governments and wildlife groups have set up nature preserves, where zebras can live without the risk of being hunted. Questions: 1. Where do all the world’s will zebras live? 2. What is teh animal group to which zebras belong? 3. Lis three things you learned about zebras by reading the selection! 4. How are people trying to help protect zebras? 5. What kind of information that you get from the text?
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Diketahui energi ikatan N = N = 163 kJ/mol dan H–H = 436 kJ/mol. Pada reaksi: ½ N2(g) + 3/2 H2(g) NH3(g) ΔH = –438 kJ/mol energi ikatan rata-rata N–H adalah … A. 1.173,5 kJ B. 735,5 kJ C. 391 kJ D. 195,5 kJ E. 130 kJ Pakai Cara!
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Bila luas penampang yang dikenai gaya 4 cm² menimbulkan tegangan sebesar 100 N, maka bila gaya tersebut bekerja pada luas penampang 5 cm², tegangan yang di timbulkannya sebesar...
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A. outside b. this morning c. ever d. on the bus e. clearly f. all day g. in old clothes h. For a week i. Already j. Every day 1. His face was dirty and he was dressed in old clothes. (manner) 2. Have you....been in a plane? (frequency) 3. She was so ill that she missed school....(duration) 4. I did some homework last night and finished it....(time) 5. We went to play......(place) 6. Dad takes the dog for a walk....(frequency) 7. Sally left her pencil case....(place) 8. Speak.... so everyone can hear you (manner) 9. It was fine day and the children played in the garden....(duration) 10. “ Go and do your homework! I’ve....done it. ”(duration)
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Sebuah batu dilempar dengan kecepatan awal 10 m/s pada saat sudut elevasi α (cos α = 3/5) dan g = 10 m/s². Pada suatu saat kecepatan batu ke arah sumbu y adalah 3 m/s. Ketinggian batu pada saat itu adalah..
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Sebuah batu dilempar dengan kecepatan awal 10 m/s pada saat sudut elevasi α (cos α = 3/5) dan g = 10 m/s². Pada suatu saat kecepatan batu ke arah sumbu y adalah 3 m/s. Ketinggian batu pada saat itu adalah...
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Batu dilemparkan dengan kecepatan awal 25 m/s dari tanah dan sudut elevasinya 45 Percepatan gravitasi 10 m/s. Kecepatan batu pada 1 sekon pertama adalah...
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Proses masuknya zat dari luar melalui membran sel dengan cara......
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