Square energy pulse traveling to the right with a speed v=2 m/s is given by the equation: f(x, t)=e if |x-vt|a≤f(x, t)=0 if |x-vt|> awhere e is an energy constant and a a length constant. i) plot this pulse as a funtion of x at t=0.ii) plot this pulse as a function of x at t=4 s. iii) expand this pulse as an infinite superposition of harmonic traveling waves of the type cos(t-kx) where /k=v.

You are sitting on the beach and wondering about the properties of mechanical waves. describe them in terms of ocean waves.

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light