What is the alumanady?

A broom is an example of machine where are the input and output forces applied? Whats a general rule for a strong base? How long does it take a pillow to decompose? What is the difference between external ventilation and internal ventilation? How do you write recycle in present perfect tense? How much is silver per ounce in 2012? What is the difference between can and could? 90 cm equals how many meters? Would it be possible for something to initially be regarded as pseudoscience and then later be supported science? Should scientist repeat experiments to compare results? Why might steps in scientific methods be skipped or changed? How can you conserve cotton? Youngs modulus for wood? Is toasted bread a physical change? How many cm in 48 mm? What is the important of einglish? What is a man made device that floats on air because the air inside if it is heated? Which force is bigger between air resistance and gravity? Is seawater a solution mechanical mixture or pure substance? All objects have momentum?