Answer:
The actual elevation angle is 12.87 degrees
Explanation:
In the attachment you can clearly see the situation. The angle of elevation as seen for the scuba diver is shown in magenta, we conclude that 
.
Using Snell's Law we can write:
,
Let's approximate the index of refraction of the air (medium 1 in the picture) to 1.
We thus have:
![\implies\theta_1=\arcsin[n_2\sin(\theta_2)]=\arcsin[1.333\sin(47)]\approx 77.13](https://tex.z-dn.net/?f=%5Cimplies%5Ctheta_1%3D%5Carcsin%5Bn_2%5Csin%28%5Ctheta_2%29%5D%3D%5Carcsin%5B1.333%5Csin%2847%29%5D%5Capprox%2077.13)
. Calling 
the actual angle of elevation, we get from the picture that 
Answer:
The answer is choice A.
Explanation:
Assuming you are in a situation with a gravitational field. You can divide the motion of the bullet into two components. One horizontal and the other in the vertical.
The advantage of using a solar cooker is that it is Eco-friendly and the disadvantage is that it can be used only under certain conditions.
<h3><u>
Explanation:</u></h3>
A solar cooker is used for cooking food without having to use electricity or gas. Instead, the appliance uses heat from the sun to cook food. It is used widely in by people who travel in remote areas or go on trips. But the appliance has limitations of its own too.
ADVANTAGES
- Using it is friendly to the environment
- It can be easily assembled without expert assistance
- No compromise on the quality and taste of foo
DISADVANTAGES
- Requires sun to function and prepare food
- Cannot function in winters or monsoon when the sun isn't present
- Does not retain heat as efficiently and quickly as compared to other cooking appliances
There isnt enough information to answer the question, the missing variable is "distance from said falling spot and ground"
