Modules Daily Challenge Dashboard
📅 2026-03-19

Daily Math Challenge

📚 Science ⭐ Hard 🎓 Grade 6-8
Water has a heat capacity of 4.18 J/g°C. How much energy is needed to heat 500g of water by 20°C?
Answer
41800 joules

📝 Step-by-Step Solution

1
Mass: 500 g
2
Temperature change: 20°C
3
Heat capacity: 4.18 J/g°C
4
Energy: 500 × 4.18 × 20 = 41,800 joules
💡 Helpful Hints
• Use formula: Q = mcΔT
• Multiply mass × heat capacity × temperature change