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According to the Scientific Method, in order to make a controlled experiment you NEED to have an hypothesis.
A controlled experiment consists of a test done by a scientist in which only one or a few variables are changed while the others remain constant in order to prove or disprove a hypothesis. This hypothesis is key to said experiment because it provides the starting point from which the professional can begin the procedure, as it helps focus on the subject that one is trying to get results from. Without a clear hypothesis, the outcome of the experimentation will not be valid nor specific.
Answer:
1) Don’t join the team unless you are willing to work hard, run hard, and play hard.
4) I won’t go home until I’ve finished all my work.
5) Julio finished the box of crackers; therefore, there was nothing left for his brother.
6) No one is at the midwinter dance because everyone went to a concert.
Ohh!! i have read this book!! He is quite a weird guy and he represents savagery
Answer: The answer is (B) microphone and speakers are not example of visual channels
Explanation: Visual communication is the practice of graphically representing information to create meaning effectively and efficiently. Visual channels are means of conveying ideas, emotions, knowledge, data that can be seen
Hand gesture and body language is a good example of visual channels in public speaking. Hand gesture and body language can help communicate better. It aids visual channels in public speaking. A hand gesture is whenever you move your hand or head to express an idea. It helps describe what you’re talking about.
Furthermore, Charts, graphs and projected images are substantial example of visual channels in public speaking. They are used in creating meaning to a target audience.