32. two cyclists who weigh the same and have identical bicycles ride up the same mountain, both starting at the same time. joe rides straight up the mountain, and bob rides up the longer road that has a lower grade. joe gets to the top before bob. ignoring friction and wind resistance, which one of the following statements is true? a) the amount of work done by joe is equal to the amount of work done by bob, but the average power exerted by joe is greater than that of bob. b) the amount of work done by joe is greater than the amount of work done by bob, and the average power exerted by joe is greater than that of bob. c) bob and joe exerted the same amount of work, and the average power of each cyclist was also the same. d) the average power exerted by bob and joe was the same, but joe exerted more work in getting there.

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) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

ice to water 1 water to vapour 2 latent heat

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