A student built a simple electromagnet with copper wire, an iron bolt, and a 1.5-volt battery. The electromagnet was able to lift a paper clip from 3 centimeters away. Select THREE ways the student can increase the strength of his electromagnet.
A.
He can use a thicker piece of copper wire.
B.
He can reverse the orientation of the battery.
C.
He can replace the iron bolt with a wooden rod.
D.
He can add a switch between the battery and the iron bolt.
E.
He can replace the 1.5-volt battery with a battery of higher voltage.
F.
He can use a longer piece of wire that wraps more times around the bolt.
The three ways the student can increase the strength of his electromagnet are:
A. He can use a thicker piece of copper wire.
E. He can replace the 1.5-volt battery with a battery of higher voltage.
F. He can use a longer piece of wire that wraps more times around the bolt.
A bowling ball is moving down a flat bowling lane at a constant speed. Which statements best describe the movement of this bowling ball? Select all that apply.
A.
Its movement is caused by unbalanced forces.
B.
Its movement changes without a force acting upon it.
C.
Its movement shows Newton's first law of motion.
D.
Its movement shows Newton's third law of motion.
E.
Its movement shows Newton's second law of motion.
F.
Its movement remains the same unless a force acts upon it.
C. Its movement shows Newton's first law of motion.
F. Its movement remains the same unless a force acts upon it.