A small toy cart equipped with a spring bumper rolls toward a wall with a speed of vv. The cart rebounds from the wall, with the same speed vv. The sketch below shows the initial velocity vector v⃗ iv→i, final velocity vector v⃗ fv→f, and the initial momentum vector p⃗ ip→i. Using the initial momentum vector as a basis, draw the change in momentum vector Δp⃗ Δp→ for the cart. You can obtain each vector's length and orientation by clicking on it to select it.

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90