It is fairly easy to build an electromagnet. All you need to do is wrap some insulated copper wire around an iron core. If you attach a battery to the wire, an electric current will begin to flow and the iron core will become magnetized. When the battery is disconnected, the iron core will lose its magnetism. Follow these steps.
Step 1 - Gather the Materials
One iron nail fifteen centimeters (6 in) long
Three meters (10 ft) of 22 gauge insulated, stranded copper wire
One or more D-cell batteries
Step 2 - Remove some Insulation
Step 3 - Wrap the Wire Around the Nail
Step 4 - Connect the Battery
Answer:
False.
Explanation:
Mass is how much space an object takes up, while weight is how light or heavy an object is.
Answer:
Net capacitance
=
let net capacitance be R
1/R = 1/10+1/10
1/R=2/10
1/R=1/5
cross mutiply
R=5
the net capacitance is 5ohms
Explanation:
The centripetal force 
on the car must equal the frictional force f in order to avoid slipping off the road. Let's apply Newton's 2nd law to the y- and x-axes.
or
Solving for 
,
Answer:
Explanation:
That Universe Consists of Matter
