Which projectiles will be visibly affected by air resistance when they fall? balloon, leaf, brick or rock?

LEAF

BALLOON

Explanation:

Air resistance depends on different factors

few of the factors are

1. speed or velocity of object

2. surface area of the object

3. density of object

So here we will notice the effect of air resistance in those type of objects very easily which have less density or which are light enough.

Also the surface area must be good enough

If above two conditions are given then air resistance will be more and the object will go slow due to air resistance.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

a sonic boom is a loud boom that breaks the sound barrier

explanation: