What is a Coal ?
Which way do twin screw props on a boat rotate when propelling the boat forward?
Why does bluing make things whiter ?
Explain the Work, Power and Energy ?
Why does a piece of ice make drink colder?
Does weight affect how far you jump?
What is the difference between dynamic strain aging and strain aging?
Why does heat cause matter to expand?
How can you save the sea from oil and sound polution?
How much does sea salt weigh per cubic foot?
What does hull speed mean?
Explain the Machines ?
How is specific gravity defined?