Answer:
I think the answer is ST. Option B
Explanation:
current = velocity/resistance
I = V/R
15/4
current = 3.75A
hope this helps...
Answer:
Phase contrast microscope
Explanation:
It is used for viewing biological structures not visible under the microscope. It is used for viewing microrganisms live
Answer:
Atomic number of calcium is 20.
For the first question you could devise a way to test the question to find the answer. You could create a sample of black cats, a sample of white cats, and a control sample of a both black and white cats.
<span>You would measure how much the cats eat each day. The study could be repeated or reviewed by your peers. </span>
<span>For the second question, there is currently no way to sample a person's thoughts, but even if there was a way, there would be no way to repeat the moment. It is not testable and not repeatable and thus cannot use the scientific method. </span>
<span>Calories can be measured and compared. </span>
<span>The tide can be observed until someone hypothesizes the right testable notion to determine the answer.</span>