The vertical displacement of an ocean wave is described by the function, y = A sin(ωt - kx). k is called the wave number (k = 2π/λ) and has a value of k = 17.5 rad/m. The remaining values are A = 5.5 m and ω = 17.5 rad/s. a) Using y = A sin(B), input an expression for B where the wave would be traveling in the -x-direction. sig. gif?t
b) What is the wave's velocity in m/s?
c) What is the wave's amplitude in m?

c.the charges if the proton and electron and gravity

d. air pressure decreases as altitude increases.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

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