A box with a mass of 6.0 kg is lifted (without acceleration) through a height of 2.0m, in order to place it upon the shelf of a closet. a) What is the increase in potential energy of the box? b) how much work was required to lift the box to this position?

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

Astudent is working in the lab to determine how time affect impulse the student keeps the force the same in each row but changes impact the time some data is shown witch trial has the greatest a student is working in the lab to determine how time affect impulse the student keeps the fours the same in each row but change is the impact time some data shown witch trial has the greatest impulse

Write down two additional questions about earth's magnetic field that will make your presentation more informative.