Abird watcher meanders through the woods, walking 1.46 km due east, 0.123 km due south, and 4.24 km in a direction 52.4° north of west. the time required for this trip is 1.285 h. determine the magnitudes of the bird watcher's (a)displacement and (b) average velocity.

(a). The displacement is 3.11 m.

(b). The average velocity is 2.42 km/hr.

Explanation:

Given that,

A bird watcher meanders through the woods, walking 1.46 km due east, 0.123 km due south, and 4.24 km in a direction 52.4° north of west.

(a). We need to calculate the displacement

Using Pythagorean theorem

(b). We need to calculate the average velocity

Using formula of average velocity

Where, D = displacement

T = time

Put the value into the formula

Hence, (a). The displacement is 3.11 m.

(b). The average velocity is 2.42 km/hr.

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

the total distance traveled by the car is

30km + 49km = 79 km .