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إظهار المزيد2 026
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لا توجد بيانات24 ساعات
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🔋Chemistry Mnemonics🔋
ACTIVITY SERIES OF METALS
Potassium > Sodium > Calcium > Magnesium > Aluminium > (Carbon) > Zinc > Iron > Tin > Lead > (Hydrogen) > Copper > Mercury > Silver > Gold > Platinum
Mnemonics :
- Please Stop Calling Me A Cute Zebra I Like Her Call Smart Goat
- Please Stop Calling Me A Careless Zebra Instead Try Learning How Copper Miners Save Gold Pit
Note - that Carbon and Hydrogen are non-metals, used as a baseline
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🔹Approximate percentage of elements in Human body-
• Oxygen - 65%
• Carbon - 18%
• Hydrogen - 10%
• Nitrogen - 3%
• Calcium - 2%
• Phosphorous - 1%
• Potassium - 0.35%
• Sodium - 0.15%
• Chloride - 0.15%
• Magnesium - 0.05%
• Iron - 0.0004%
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Dekho ager tumhre marks top 100 me aaye to.. Classroom test series & regular classroom course bilkul free mil skta haii.. ✔+5🛑 Short Notes : P-block (Group -13) The Boron Family
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Q1:-What is the electronic configuration of hydrogen molecule?
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#ShareWithAll There are Many students specially from rular areas who are not aware of scholarship exams which can help them finencially to get their higher education , although they are good in studying but due to financial problems they can't fullfill their dreams and found hopeless at last ...... we are promoting such scholarship exams so that everyone can know about it and can give such exams ......
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📐 त्रिकोणमिति : महत्वपूर्ण सूत्र 📐
🔴 योग सूत्र
➭ Sin(A+B) = SinACosB+CosASinB
➭ Sin(A-B) = SinACosB-CosASinB
➭ Cos(A+B) = CosACosB-SinASinB
➭ Cos(A-B) = CosACosB+SinASinB
🔴 अन्तर सूत्र
➭ tan(A+B) = tanA+tanB/1-tanAtanB
➭ tan(A-B) = tanA-tanB/1+tanAtanB
🔴 C-D सूत्र
➭ SinC+SinD = 2Sin(C+D/2) Cos(C-D/2)
➭ SinC-SinD = 2Cos(C+D/2) Sin(C-D/2)
➭ CosC+CosD = 2Cos(C+D/2) Cos(C-D/2)
➭ CosC-CosD = 2Sin(C+D/2) Sin(D-C/2)
➭ CosC-CosD = -2Sin(C+D/2) Sin(C-D/2)
🔴 रूपांतरण सूत्र
➛ 2SinACosB = Sin(A+B)+Sin(A-B)
➛ 2CosASinB = Sin(A+B)-Sin(A-B)
➛ 2CosACosB = Cos(A+B)+Cos(A-B)
➛ 2SinASinB = Cos(A-B)-Cos(A+B)
🔴 द्विक कोण सूत्र
➛ Sin2A = 2SinACosA
➛ Cos2A = Cos²A-Sin²A = 2Cos²-1 = 1-2Sin²A
➛ tan2A = 2tanA/1-tan²A
➛ Sin2A = 2tanA/1+tan²A
➛ Cos2A = 1-tan²A/1+tan²A
🔴विशिष्ट सूत्र
➛ Sin(A+B)Sin(A-B) = Sin²A-Sin²B
= Cos²B-Cos²A
➛ Cos(A+B)Cos(A-B) = Cos²A-Sin²B = Cos²B-Sin²A
🔴 त्रिक कोण सूत्र
➛ Sin3A = 3SinA-4Sin³A
➛ Cos3A = 4Cos³A-3CosA
➛ tan3A = 3tanA-tan³A/1-3tan²A
🔴 महत्वपूर्ण सर्वसमिकाएं
➛ Sin²θ+Cos²θ = 1
➭ Sin²θ = 1-Cos²θ
➭ Cos²θ = 1-Sin²θ
➛ 1+tan²θ = Sec²θ
➭ Sec²θ-tan²θ = 1
➭ tan²θ = Sec²θ-1
➛ 1+Cot²θ = Cosec²θ
➭ Cosec²θ-Cot²θ = 1
➭ Cot²θ = Cosec²θ-1
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📅 Exam Dates and 🕜 Timing
Online: 5th Nov to 13th Nov, 10 AM - 7 PM
Offline: 6th Nov & 13th Nov, Morning: 10:30 AM - 11:30 AM , Evening: 4 PM - 5 PM
🚀 Win a Trip to NASA
🎓 Get Up To 100% Scholarship
💸 Cash Awards for top performers
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