The energy in water pooled behind a dam is converted to _ energy as gravity causes the water to surge through tunnels in the dam. The energy in the moving water is then converted to hydroelectric power as the water spins turbines inside the dam.

Answers

Answer 1

Answer:

Still water behind the dam has potential energy which is converted to kinetic energy by gravity.

C. 400 J

Explanation:

In physics, work is defined as

$W=F * \Delta d$

Where $W$ is the word done, $F$ is the force that move the object and $\Delta d$ is the change of the position of the object.

In this case, we have

$F= 100 \ N$

$\Delta d= 6m - 2m = 4m$ , remember that the difference refers to the actual subtraction between the final point and the initial point of the object.

Replacing these values, we have

$W= 100 \ N * 4m\nW=400 \ Joules$

Therefore, the right answer is C. The work done is 400 Joules

Answer:

400 J

Explanation:

I just took the test and can confirm this.

What is an example of a light mediem wave.

Answers

Speed of light is an example of a light medium wave.

Most famous Michelson-Morley (1887) demonstrated that light travels at the same speed regardless of whether it was measured in the direction of the Earth's motion or at right angles to it. When the light travels through a vacuum: It moves from medium to medium (example: air to glass) speed can change depending of the new medium's index of refraction and the "bending" of light is essentially how lenses work.

Hey there

An example of a light medium wave is Speed of light.

What must you do before you make a hypothesis?

Answers

Answer:

Before you make a hypothesis, you have to clearly identify the question you are interested in studying. A hypothesis is a statement, not a question. Your hypothesis is not the scientific question in your project. The hypothesis is an educated, testable prediction about what will happen

Explanation:

Final answer:

Before you make a hypothesis, you need to do preliminary research to understand the subject and define the problem. Collect and analyze relevant data and then based on your observations, you can create an educated guess or hypothesis to be tested.

Explanation:

Before you make a hypothesis, there are several important steps you should undertake. Firstly, you need to do some preliminary research. This research can involve reading books, scholarly articles, or trustworthy digital resources about the subject of interest. It is key to understand the subject well before developing a hypothesis. Secondly, you need to clearly define the problem or question you are interested in answering.

Next, make observations and gather data related to the problem. This is often called data collection and may involve conducting surveys, experiments, or fieldwork. After collecting and analyzing all the relevant data, you can formulate a hypothesis. A hypothesis is an educated guess about how things work or a tentative explanation that you will test in your experiment.