Answer:
f = 200[Hz]; L=1500[km]
Explanation:
We know that frequency is the reciprocal of the period, therefore.
And the wavelength is determined using the following equation.
Depends on the weight of the bird.
1) Half a mile is about 800m.
2) 14000 lbs = about 6 tones, same like couple 4WD
3) Fuel consumption is about 20L per 100km or 0.2l each 1km or 0.16L within 800m
4) density of fuel is about 70% of density of water so .... weight of 1.6L of fuel burned would be about 1.6*0.7=1.1 kg
So if birds mass would be below 1 kg - the bridge will not collapse. But if it would be a pelican with the mass of 9kg - it would be a drama :)
Like the law says you can't crest energy
Answer:
A) F=650N
B) W=0J
C)
Explanation:
A) Considering the equation , we can calculate:
B) The work the wall does is 0J, because the fingers of the scater against it do not move. It's the muscles on his arm that do the work.
C)