From a branch 35 m high, a 0.75 kg bird dives into a small fish tank containing

50 kg of water. What is the maximum rise in temperature of the water if the bird

gives it all of its mechanical energy?

ΔT = 1.22*10^-3 °C

Explanation:

First, you calculate the potential energy of the bird when it is at 35 m high. The potential energy is also the mechanical energy of the bird in this case.

m: mass of the bird = 0.75kg

g: gravitational constant = 9.8m/s^2

h: height = 35m

All this energy is given to the water. You use the following formula in order to calculate the change in temperature:

m: mass of the water = 50kg

c: specific heat of water = 4186 J/kg°C

Q is equal to U (potential energy of the bird) because the bird gives all its energy to water. By doing ΔT the subject of the formula you obtain:

hence, the maximum rise in temperature is 0.00122 °C

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.