A harmonic wave travels in the positive x direction at 11 m/s along a taught strong. A fixed point on the string oscillates as a function of time according to the equation y=0.024 cos(3t) where y is the displacement in meters and the time t is in seconds.
What is the frequency of the wave in hertz? Frequency =

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

What is created when solids,liquids,an gases mix with one another

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather