A bus driver slams on the brakes to avoid an accident. The tread marks of the tires are 0.075 km long. If the coefficient of kinetic friction uk =0.8, what was the speed of the bus before applying brakes?

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day