The longest pipe found in most medium size pipe organs is 4.88 (16 ft) long. what is the frequency of the note corresponding to the fundamental mode if the pipe is open at one end and closed at the other?
a) 17.6 hz
b) 14.3 hz
c) 19.8 hz
d) 25.1 hz

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.