OK, so you know how the normal formula is y=Asin(wt-kx) but now they've given an equation with cos. I need to find the propagation speed of the wave following this equation: y=2cospi(x-2t) Help

A plane is flying at 140km/h in a wind blowing 60km/h (S20*E) in which direction should the plane fly to go 1000km directly North? How long will it take? Help me I'm lost!! :

How a Karate player is able to break a pile of bricks with a single blow?

I am doing a school project on the physics behind motion detectors. I have done some research but only found some info on "Smart detectors." Can anyone help me?? I have ordered a motion detector kit, and must put it together, but I also am required to know the science behind motion detection...

Hi. I have 2 animals a cheetah and an antelope. From previous question set for me I have been given the following information: The cheetah accelerates from rest (0ms-1) to 20ms-1 in 2 seconds It has a top speed of 30ms-1 It can only maintain this speed for 450m before it has to rest An...