A man standing between two cliffs blew a whistle and heard echoes after
2 s and 2.5 s. Calculate the distance
between the cliffs.
s']
[Speed of sound in air = 340 ms

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?

Which inventor was often called the lady edison