Question

In the past, salmon would swim more than 1130 km (700 mi) to spawn at the headwaters of the Salmon River in central Idaho. The trip took about 22 days, and the fish consumed energy at a rate of 2.0 W for each kilogram of body mass. Part A What is the total energy used by a 2.0-kg salmon while making this 22-day trip?

Answer 1

Answer:

$E_t_o_t_a_l=7.603MJ$

Explanation:

The salmon's total energy use , which is equivalent to work done,$W$, by swimming upstream, is related to the specific mechanical power. $Mechanical \ power$ per unit mass is defined by the equation:

$\frac{p}{m}=\frac{1}{m}|\frac{dW}{dt}|=2W/kg\\\frac{1}{2}|\frac{W}{22\times 24 \times 60\times 60}|=2\\\\W=7.603MJ$

Hence, the energy total for the 22-day trip is 7.603MJ