A man pushes a box against the Wall just hard enough to keep it from sliding down. He pushes on the bottom corner of the box opposite of the wall. His arms are angled up at 15° while he
applies a 90N force. The static friction coefficient between the box and the wall is .05. What is
the mass of the box?

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

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.