Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is 
Explanation:
From the question we are told that
The depth is 
The time taken for water to fall to below the river is 
The horizontal distance from the base of the vertical cliff is 
Generally the horizontal speed at the top is mathematically represented as
=> 
=>
First we have to convert 6 grams to kg (0.006 kg) and then using the thermal physics formula which is Q=m*c*change in temperature, we get 478,8 joule
(Btw c is the specific heat capacity of water which is 4200 j/kg °C
Tasting or touching solutions to identify whether it is an acid or a base is something that you should always avoid since it can be dangerous and, in some cases, deadly.
<span>Phenolphthalein is typically used to test the pH level of a solution. Since you can determine whether a solution is an acid or a base by identifying the pH level, this is one of the correct answers.
</span>However, the question says to "select all that apply," so let's also check the last option, litmus paper.
Litmus paper is commonly used to identify whether something is an acid or a base. When blue litmus paper is exposed to an acid, it turns red. When red litmus paper is exposed to bases, it turns blue.
This means that the answers you should select are both litmus paper and <span>phenolphthalein.
Hope this helps!</span>
Answer:
The answer would be
A.) Belonging to the modern era
You should check out this website:
https://www.hunker.com/12003706/the-four-and-more-basic-parts-of-an-electrical-circuit
