Magnets and electromagnets can both be used to pick up metal items like iron nails. although they are alike, there is a difference between magnets and electromagnets. an example of this is that increasing the current running through the electromagnet's wire will make it stronger. what is another difference? a)increasing the amount of wire loops will increase the strength of an electromagnet.
b)increasing the amount of wire loops will increase the strength of a magnet.
c)there is no other difference between electromagnets and magnets.
d)electromagnets are always stronger than regular magnets.

theanswer is A)Increasing the amount of wire loops will increase the strength of an electromagnet.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

the inner core.

good luck: )

klicker