Aball is released at the point x = 2 m on an inclined plane with a nonzero initial velocity. after being released, the ball moves with constant acceleration. the acceleration and initial velocity of the ball is described by one of the following cases: case 1 a > 0 v0 > 0; case 2 a > 0 v0< 0; case 3a< 0 v0 > 0; case 4a < 0 v0 < 0
(a) in which of these cases will the ball definitely pass x = 0 at some later time?
(b) in which of these cases is mo/re information needed to determine whether the ball will cross x = 0?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Which of the following characteristics is fixed, or definite, for all states of matter?