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velocity (v) = frequency of the wave (f) x wavelength of wave (in metres) (λ)
50cm in metres: 50/100 = 0.5m
Therefore (v) = 680 x 0.5= 340 (m/s)

The glass screen is a brittle material so breaks with little plastic deformation.The aluminium material however shows elastic behavior and will, when the force is removed return to the original shape. Thi...

This question is also applicable to physics mechanics.

Many would think the bullet will hit the monkey because it is travelling much faster than him. However, modelling the monkey as a particle...

Momentum before the collision or separation must equal the momentum afterwards, this is called the conservation of momentum. The situation before had the skateboarder on the skateboard, both stationary. A...

Firstly, we should equate the centripetal force to the force on a moving charge using equations from our formula booklet: (force on a moving charge): F = Bqv(centripetal ...