What is a scientific theory A. A summary of the data collected during one experiment

B. An explanation of things or events based on knowledge gained from many observations and investigations

C. A statement about what happens in nature that seems to always be true all the time

D. An educated guess about an experiment

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Can someone answer my last question i posted? on my last post? my hw is due tomorrow and i’m confused.

Which statements describe how a machine can make work easier? check all that apply. it can put out more force than the input force by decreasing the distance through which force is applied. it can increase the amount of work performed if the output force is in the same direction as the input force. it can apply a force to an object in a different direction than the force applied to the machine. it can increase the distance through which a force acts by exerting less force than was used on it. it can exert a greater force through a greater distance than the force used on the machine.