A boy throws a ball vertically upward with velocity 20 m/s. Time after which ball returns to his hands (g=10) is MCQ with Answer and Explanation

Explanation:
Silicon and germanium are semiconductors.

Explanation:
Time of ascent = u/g = 4 s. Distance in last second (4th) = ½g(1)²? Actually, during last second of upward journey, velocity becomes zero. Distance = ½g(1)² = 5 m. Formula: s = u - g/2 (2n-1) with n=4? Let's compute: s_nth = u - (g/2)(2n-1). For n=4 (4th second), s = 40 - 5×7 = 40 - 35 = 5 m. Yes.

Explanation:
Least count = 1 MSD - 1 VSD = 0.1 - 0.09 = 0.01 cm (common).