Preston pushes a wheelbarrow weighing 500 n to the top of a 50.0-m ramp, inclined at 20.0° with the horizontal, and leaves it. tamara accidentally bumps the wheelbarrow. it slides back down the ramp, during which an 80.0-n frictional force acts on it over the 50.0 m. what is the wheelbarrow's kinetic energy at the bottom at of the ramp

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

What is created when solids,liquids,an gases mix with one another

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?