If b humans cannot see ultraviolet waves how can ultraviolet light be used to gather evidence of a crime?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

What is the coefficient of kinetic friction μk between the block and the tabletop?

What is the relationship between globular clusters and the milky way?