How much heat is released when 30 g of water at 96 °C cools to 16 °C ? The specific heat of water is 4184 J/kg°C

10 041.6 J

Explanation:

The equation for heat (energy) lost or gained by a system is

Q=mcΔT

Where Q is heat

m is the mass in kilograms

c is the specific heat of a substance

and T is the change in temperature

To start we convert 30g to kg by dividing by 1000

30/1000=0.03kg

We can now plug in all our values

Q= 0.03×4184×(96-16)= 10 041.6J

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