Aball is dropped from a 150-m tall building. neglecting air resistance, what will the speed of the ball be when it reaches the ground 5.5 second later ?

The big glowy thing is called the sun it is a star in our galaxy and is over 1 million degrees

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other