<span>A. Rocket A will travel farther horizontally than rocket B.
This is because from the x axis, 40 m/s at 90 degrees travels directly vertical. 40 m/s at 70 degrees is slightly horizontal, so it will travel further horizontally.</span>
Answer:
![v_2=29.13\ m/s](https://tex.z-dn.net/?f=v_2%3D29.13%5C%20m%2Fs)
Explanation:
It is given that,
Dimension of the rectangular roof, (6.17 m × 5.92 m)
The maximum net outward force, ![F=2\times 10^4\ N](https://tex.z-dn.net/?f=F%3D2%5Ctimes%2010%5E4%5C%20N)
The density of air, ![\rho=1.29\ kg/m^3](https://tex.z-dn.net/?f=%5Crho%3D1.29%5C%20kg%2Fm%5E3)
The Bernoulli equation is used to find wind speed of this roof blow outward. It is given by :
![P_1+\dfrac{1}{2}\rho v_1^2=P_2+\dfrac{1}{2}\rho v_2^2](https://tex.z-dn.net/?f=P_1%2B%5Cdfrac%7B1%7D%7B2%7D%5Crho%20v_1%5E2%3DP_2%2B%5Cdfrac%7B1%7D%7B2%7D%5Crho%20v_2%5E2)
Here,
(since air inside the roof is not moving)
![v_2=\sqrt{\dfrac{2(P_1-P_2)}{\rho}}](https://tex.z-dn.net/?f=v_2%3D%5Csqrt%7B%5Cdfrac%7B2%28P_1-P_2%29%7D%7B%5Crho%7D%7D)
Since, ![F=(P_1-P_2)A](https://tex.z-dn.net/?f=F%3D%28P_1-P_2%29A)
![v_2=\sqrt{\dfrac{2F}{\rho A}}](https://tex.z-dn.net/?f=v_2%3D%5Csqrt%7B%5Cdfrac%7B2F%7D%7B%5Crho%20A%7D%7D)
![v_2=\sqrt{\dfrac{2\times 2\times 10^4}{1.29\times 6.17\times 5.92 }}](https://tex.z-dn.net/?f=v_2%3D%5Csqrt%7B%5Cdfrac%7B2%5Ctimes%202%5Ctimes%2010%5E4%7D%7B1.29%5Ctimes%206.17%5Ctimes%205.92%20%7D%7D)
![v_2=29.13\ m/s](https://tex.z-dn.net/?f=v_2%3D29.13%5C%20m%2Fs)
So, the wind speed of this roof blow outward is 29.13 m/s. Hence, this is the required solution.
The angle of reflection is "60°".
Here we apply the law of the concept of reflection then we get the final answer easily.
The angle of incident = angle of reflection
Then, the Angle of the incident =60°
What is reflection?
- Reflection is the phenomenon of light rays returning to the source after striking an obstruction.
- It resembles the way a ball bounces when we toss it on a hard surface.
- Some of the light rays that strike an item are reflected, some of them travel through it, and the remainder are absorbed by the object.
- The given values are:Light from a monochromatic source,= 560 nm
- The angle of incidence,= 60°
- The surface of fused quartz (n),= 1.56
- When a light ray does exist on a flat surface, the law or idea of reflection should apply since it includes both the reflected and "normal" light rays at the mirror surface.
- According to the above law,Angle of incident = angle of reflection
- Then, Angle of incident =60°.
To learn more about reflection visit: brainly.com/question/15487308
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The third statement is true:
A neap tide can occur for position A but not position B
Position B is a Spring tide