7×(-2)+13-(-5)=

Watch these videos (link attached), and answer the following questions! Work with your porther! What Causes Wind Blow? https://youtu.be/edsNPCwU9ios-28ZWP9f5-DhAw213 How Do Maglev Trains Work? https://youtu.be/m-rNILc/TKMP-60K4No3A5 K305 1. What happens to air molecules when air heats them up? 2. Why do air molecules move? And from where to where? 3. In summary, what causes wind to blow? 4. Why do cold air molecules sink? 5. What makes Maglev trains float above the track? 6. How to make Maglev trains run faster? 7. How to make Maglev trains move forward? 8. What is the advantage of Maglev trains compare to regular trains? 9. If Maglev use magnet to float, how to keep it on the track? 10. What technology is being used to make powerful magnet and switch the poles electronically?

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1. Hitunglah nilai pH dari larutan asam berikut: CHCOOH 0,1 M dengan Ka = 1 * 10 ^ - 5 : HCI 0,01 M 2. Sebanyak 0,37 gram Ca(OH)2 (Ar Ca = 40 O-16, H = 1 ) dilarutkan dalam air hingga volume larutan menjadi 500 mL.. Tentukan pH larutan basa kuat tersebut.

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Tolong bantu jawab🙏🏻

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help me! buat soal ujian sekolah

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tolong dibantu dong cara ngerjainnya gimana

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