An ‘anti-drowning’ bracelet is a water safety device. It contains a CO2 cartridge that can quickly inflate an airbag to help a diver rise to the surface in an emergency situation. Robert Irwin (son of "The Crocodile Hunter" Steve Irwin) is snorkeling at the Great Barrier Reef (rhoseawater = 1029 kg/m3). He swims 5.0 m below the surface of the water when there is an emergency and he activates the bracelet. The mass of Robert and his gear is 69.2 kg and the volume of salt water he displaces is 0.07 m3 before the safety device is activated. Once he activates the device, it inflates to a volume of 0.01 m3.

How long would it take him to get to the surface assuming he starts from rest (ignore any drag forces from the water)?

i sometimes feel that way too. i feel that i should hurt someone because they hurt me, but i wouldnt do it. that would make things so much worse i have so much experience with this stuff

explanation:

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

total distance/total time

(85 + 82)/(5+3)

167/8

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