What is the wavelength of a 2.0 mhz ultrasound wave traveling through aluminum? assume that the speed of sound in aluminum is 5100 m/s. express your answer using two significant figures. λ = 2.6 mm submitprevious answers correct part b what frequency of electromagnetic wave would have the same wavelength as the ultrasound wave of part a?

The wavelength and the frequency  is mathematically given as

a)w= 2.55 mm

b)f=0.13 MHz

Question Parameters:

the wavelength of a 2.0 mhz ultrasound wave traveling through aluminum

. λ = 2.6 mm submitprevious

the speed of sound in aluminum is 5100 m/s.

Generally the equation for the wavelength  is mathematically given as

w=v/f

Therefore

w= 5100 / 2*10^6

w= 2.55 mm

b)

f=v/w

Therefore

f= 333 / 0.00255

f=0.13 MHz

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less than, more

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.