ntaexam

A force is anything that can change an object’s state of motion, such as a push or pull. You use force when you press a letter on a computer keyboard or when you kick a … Read more

Alaska is a state located in the northwest extremity of the United States West Coast, just across the Bering Strait from Asia. An exclave of the U.S., it borders the Canadian province of British Columbia … Read more

Stegosaurus is a dinosaur that lived about 150 million years ago in the late Jurassic period. Stegosaurus fossils have been found in western North America and Europe. It was first named and discovered by Othniel … Read more

Magnetism is an invisible force or field caused by the unique properties of certain materials. In most objects, electrons rotate in different random directions. This causes them to cancel each other out over time. However, … Read more

Absorption – Absorption occurs when part of the wave energy is removed when the wave encounters the medium. Amplitude – A measure of the displacement of a wave from its resting position. The higher the … Read more

We constantly use electricity in our daily lives. It is one of the most important types of power and energy we use. Electricity goes to our house via power lines from a large power plant … Read more

Aluminum is the 2nd element in the 13th column of the periodic table. It is classified as a post-conversion metal and as a “poor metal”. The aluminum atom contains 13 electrons and 13 protons. There … Read more