When is an object said to be moving in uniform motion? What does its distance-time graph look like?

Express the relationship between speed, distance, and time as an equation.

What is an electromagnet? In an electromagnet, what is the advantage of the iron core?

Kirti and her family were at home during a cyclone. Her little brother wanted to play in the rain, but Kirti said it was not safe. She offered to play indoor games or read to him. Why is it not safe to play in the rain during a cyclone?

Wind energy is a transformed form of the Sun's energy. Justify this statement.