What are examples of a scientific problem?

What is the use of a powerful microscope? Why does salt or sugar does not dissolve in kerosene? When looking at a specimen for the fir ts time under a microscope do you view with high power objective or lowest objective fir ts? Why is an experiment still valuable even when the hypothesis it is testing is true? When you read this question and consider the different answers in order to compare the answers your brain uses what memory? How is a bent paper clip a physical change? What are the difference between superstitions and scientifically base belief? How many Kilograms is 1 Full Container Load? How many half-lives have passed if 12.5 of a radioactive sample are left? Who is Peter norton? How do you convert 456centilitres to milliliters? How to get fast if slow? What is 21 grams equal to in parts of an ounce? What are some things that magnify? Is a beluga whale a hervivore carnivore or omnivore? Is confidence a noun or common noun answers? What is the smallest mass you can find on a triple beam balance? What is the misuse of dynamite? How is evolution different from natural selection? What is another name for scientific guess?