False, it does create pollution form the smoke stacks and after the process is done they have barrels of toxic waste
1. Velocity at which the packet reaches the ground: 121.2 m/s
The motion of the packet is a uniformly accelerated motion, with constant acceleration
directed downward, initial vertical position
, and initial vertical velocity
. We can use the following SUVAT equation to find the final velocity of the packet after travelling for d=750 m:
![v_f^2 -v_i^2 =2ad](https://tex.z-dn.net/?f=v_f%5E2%20-v_i%5E2%20%3D2ad)
substituting, we find
![v_f^2 = 2ad\\v_f = \sqrt{2ad}=\sqrt{2(9.8 m/s^2)(750 m)}=121.2 m/s](https://tex.z-dn.net/?f=v_f%5E2%20%3D%202ad%5C%5Cv_f%20%3D%20%5Csqrt%7B2ad%7D%3D%5Csqrt%7B2%289.8%20m%2Fs%5E2%29%28750%20m%29%7D%3D121.2%20m%2Fs)
2. height at which the packet has half this velocity: 562.6 m
We need to find the heigth at which the packet has a velocity of
![v_f=\frac{121.2 m/s}{2}=60.6 m/s](https://tex.z-dn.net/?f=v_f%3D%5Cfrac%7B121.2%20m%2Fs%7D%7B2%7D%3D60.6%20m%2Fs)
In order to do that, we use again the same SUVAT equation substituting
with this value, so that we find the new distance d that the packet travelled from the helicopter to reach this velocity:
![v_f^2-v_i^2=2ad\\d=\frac{v_f^2}{2a}=\frac{(60.6 m/s)^2}{2(9.8 m/s^2)}=187.4 m](https://tex.z-dn.net/?f=v_f%5E2-v_i%5E2%3D2ad%5C%5Cd%3D%5Cfrac%7Bv_f%5E2%7D%7B2a%7D%3D%5Cfrac%7B%2860.6%20m%2Fs%29%5E2%7D%7B2%289.8%20m%2Fs%5E2%29%7D%3D187.4%20m)
Which means that the heigth of the packet was
![h=750 m-187.4 m=562.6 m](https://tex.z-dn.net/?f=h%3D750%20m-187.4%20m%3D562.6%20m)
The statement: "secondary evidence is the basis for drawing scientific conclusions" is definitely false. Secondary evidence is the body of information obtained to prove the existence of unknown or missing primary evidence. In drawing scientific conclusions, primary evidence is needed.
Answer:
11 kilometers (7 miles) per second, or over 40,000 kilometers per hour (25,000 miles per hour)
Explanation: