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. a. what is the total energy used by a 3.5-kg salmon while making this 22-day trip? b. about 80% of this energy is released by burning fat and the other 20% by burning protein. how many grams of fat are burned? c. if the salmon is about 15% fat at the beginning of the trip, how many grams of fat does it have at the end of the trip?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w

What is a carrier wave and how does it affect what you hear on the radio