Which of the following is the only requirement for an object to be in projectile motion? a. the horizontal and vertical motions are independent. b. the path of the object follows the curve. c there must be no horizontal acceleration. d. gravity is the only force acting on the object gravity is the only force acting on the object.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

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?

If a star is moving toward earth, it is