In bulbs 93 percent Argon and 7 percent Nitrogen is filled because both these are generally heavy gases so they reduce transfer of heat between panels in bulb.... also both are colourless and dry gases....
Only nitrogen and argon is used in bulbs because these gases get heat up very fast and they are easily available in large quantity in nature to us in sufficient cost.
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Nitrogen and argon are used in light bulbs because they are inert gases that prevent reactions with the filament, thereby increasing bulb lifespan. Argon aids in heat dissipation, while both gases are cost-effective to use. Their properties ensure the safety, stability, and quality of light produced by the bulb.
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Jawaban: It's 4 o'clock. The children are coming from class.Pembahasan:"from" digunakan untuk menyatakan asal atau tempat keberangkatan.Karena mereka baru selesai mengikuti kelas, maka mereka datang dari kelas.Contoh lain penggunaan “from”:She came from school.They are returning from the market.Jika yang ditanyakan arah ke kelas, maka kata yang digunakan adalah "to":The children are going to class.Tapi dalam soal ini mereka datang dari kelas, jadi jawabannya adalah "from."