Explanation:
Total time of flight T = 2u/g => u = gT/2 = 10×6/2 = 30 m/s. Max height H = u²/(2g) = 900/20 = 45 m. Alternatively, time to max height = 3 s, H = ½g t² = ½×10×9 = 45 m.
Explanation:
Boiling occurs when vapour pressure equals atmospheric pressure. At high altitude, atmospheric pressure is lower, so water boils at lower temperature. Pressure cooker increases pressure to raise boiling point for faster cooking.
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