two simple pendulums of lengths 1.44 m and 1.21 m start swinging at the same time from a location. after how much time , they will be (a) out of the phase and (b) again? take g=10ms

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island