How would replacing the aluminum core of an electromagnet with an iron core affect the electromagnet A. its strength would stay the same
B. it would become stronger
C. its strength would vary randomly
D. it would become weaker

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.

What is the coldest temperature ever recorded in san antonio?

What do scientists use a scientific law for?