Merry-go-round at an amusement park is initially at rest. It begins to rotate at time t = 0 . The angle through which it rotates is defined by θ(t) = ( t + ke−t/k) , where k is a positive constant, t is in seconds, and θ is in radians. Find the angular velocity of the merry-go-round at t = T.

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.

reserve is the answer

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.