Couldn’t really read or see the problem clearly, but from what I think I saw I would say B
Many animals rely on their sense to alert them about changes in temperature. <span>Some ways that animals adapt for the seasons include migration, hibernation and physical changes that help them survive the differences in the weather. Hope this helps.</span>
Answer:
117.88m
Explanation:
We can use the formula [ s = ut + 1/2at^2 ] to solve this problem.
We know that constant acceleration is a = 9/8m/a^2, the initial velocity is 0, and the height is 87 so the only variable we need to solve for is "t".
87 = 0t + 1/2(9.8)(t^2)
t = √174/9.8
t = 4.21s
Now multiply the time by the speed given.
28m/s * 4.21s = 117.88m
Best of Luck!
Answer:
a) Magnitude = 1.03 m/s², Direction: south
b) ![V_{f} = 8.16 m/s](https://tex.z-dn.net/?f=V_%7Bf%7D%20%3D%208.16%20m%2Fs%20)
Explanation:
a) The magnitude and direction of the acceleration can be calculated using the following equation:
(1)
Where:
: is the final speed = 9.40 m/s
: is the initial speed = 13.0 m/s
t: is the time = 3.50 s
Solving equation (1) for a, we have:
![a = \frac{V_{f} - V_{0}}{t} = \frac{9.40 m/s - 13.0 m/s}{3.50 s} = -1.03 m/s^{2}](https://tex.z-dn.net/?f=%20a%20%3D%20%5Cfrac%7BV_%7Bf%7D%20-%20V_%7B0%7D%7D%7Bt%7D%20%3D%20%5Cfrac%7B9.40%20m%2Fs%20-%2013.0%20m%2Fs%7D%7B3.50%20s%7D%20%3D%20-1.03%20m%2Fs%5E%7B2%7D%20)
Hence, the magnitude of the acceleration is 1.03 m/s² and the direction of the bird's acceleration is the opposite of the initial velocity direction, which means that the bird is decelerating.
b) The final velocity of the bird can be found using the same equation 1:
![V_{f} = V_{0} + at](https://tex.z-dn.net/?f=%20V_%7Bf%7D%20%3D%20V_%7B0%7D%20%2B%20at%20)
![V_{f} = 13.0 m/s + (-1.03 m/s^{2})*(3.50 s + 1.20 s) = 8.16 m/s](https://tex.z-dn.net/?f=%20V_%7Bf%7D%20%3D%2013.0%20m%2Fs%20%2B%20%28-1.03%20m%2Fs%5E%7B2%7D%29%2A%283.50%20s%20%2B%201.20%20s%29%20%3D%208.16%20m%2Fs%20)
Therefore, the bird’s velocity after an additional 1.20 s has elapsed is 8.16 m/s.
I hope it helps you!
Answer: A,B, and E
Explanation: Just checked I got them right:)