A bus traveling with a speed of 54 km/h has a kinetic energy of 2 X 10%J. What is the mass of the bus? a 2.88 x 105 kg b 2.88 x 107 kg C 1.78 101 kg d 1.78 x 10 kg​

1.78 x 10² kg

Explanation:

KE = ½mv²

m = 2KE/v² = 2(2e4)/(54/3.6)² = 177.777...

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.