Atmospheric pressure at sea level in pascal is approximately
A. 1.01 × 10⁵ Pa
B. 1.01 × 10⁷ Pa
C. 1.01 × 10³ Pa
D. 1.01 × 10⁹ Pa
Answer: Option A
Solution (By JKSSB Mock Tests)
Standard atmospheric pressure 1 atm = 1.01325 × 10⁵ Pa ≈ 1.01 × 10⁵ Pa = 101 kPa. Also equals 760 mm of Hg. This is an important conversion for pressure units.
Explanation:
Watt is unit of power (J/s). Kilowatt-hour is energy (power × time). Joule is SI unit of energy. Electron volt is energy unit (1.6×10⁻¹⁹ J). Remember: power = energy/time. So watt is not energy.
Explanation:
Sound travels to cliff and back. Total distance = speed × time = 340 × 2 = 680 m. So distance to cliff = 680/2 = 340 m. Use formula d = (v × t)/2. Time for round trip. Minimum distance for echo 17 m (approx) for 0.1 s persistence.
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