Answer:
(a) The magnitude of the bird watcher's displacement is: 1.739 Km and (b) Average Velocity is: 0.863 Km/h.
Explanation:
To know the magnited of the bird watcher's displacement, we need to use cartesian coordinates. The distance that the bird watcher walked is the vector addition of all movement from the start point. So East = 1.4 - 3.26*Cos(78.6) = 0.756 Km and North = -1.63 + 3.26*Sen (78.6) = 1.566 Km when we have got result of both components axles, we use the pythagorean theorem to get the displacement that the bird watcher walked; R^{2}=x^{2}+y^{2} =\sqrt{0.756^{2}+(1.566)^{2}}=1.739(Km). Then we are going to calculate average velocity as: where delta_x is the displacement traveled by the bird watcher and delta_t is the total time using during the movement, so .
The action is the child sticking his/her hand out of the window of the moving car.
The reaction is getting yelled at by his/her parents as soon as they notice it.
the answer is true because i think its true not 100 percent sure
<span> Ok, so slope of the lane gives the ball a constant acceleration of 1.8 m/s for 2.5 s
[lane slope = arcsine (1.8/9.8) = 10.6°]
which increases speed of the ball by
1.8(2.5) = 4.5 m/s
The ball reaches the pins with a speed = 7.6 m/s, so it must have left Josh's hand with a speed of
7.6 - 4.5 = 3.1 m/s ANS</span>
Answer: 8 or 9
Explanation: they are so many ocean water in the world