Which of the following would help you move a heavy object across a concrete floor?

Group of answer choices

foam rubber

steel rods

ball bearings

soap suds

oil

water

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

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

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud