Physics, 19.11.2019 05:31 jessica28757

During convection, hot substances while cooler substances
a. rise; sink
b. sink; rise
c. rise; remain stationary
d. sink; remain stationary

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Answer from: kkmwkk031

When convection is taking place, there will be rise of hot substance, while the cooler substance sink.

Convection happens as result of particles having a lot of heat energy in a liquid or gas which rise and move to the part where there is less heat energy to take their place.During convection, Heat energy is been transferred from hot places to cooler places. When Liquids and gases are been heated up, they expand, The denser cold substance then moves into the warm areas.Convection can be regarded as transfer of heat in a fluid through a a current. these fluid could be air or water . As the fluid been heated up, the particles becomes less dense and then spread out. The warm water that is present at the bottom of the pot will then rises up then it will display the cold fluids as result of this the cold substance will sink.Example of convection is rising of hot air.

Therefore, convection involves of transfer heat.

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Answer from: Quest

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

Answer from: Quest

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

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During convection, hot substances while cooler substances
a. rise; sink
b. sink; ris...

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