The drawing shows a version of the loop-the-loop trick for a small car. The radius of the loop = 0.48 m. What is minimum initial speed () that the car needs to have in order to remain in contact with the circular track at all times?

The air that we breath is made mostly of which gaseous molecule

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.

Macy always thought there were only a few hair colors blonde brown and black however when she actually began looking around she saw varying shades of these hair color what is a possible reason for so many different hair colors