You throw a softball (of mass 300 g) straight up into the air. it reaches a maximum altitude of 10.1 m and then returns to you. what is the gravitational potential energy of the softball at its highest position? assume the ball departed from and returned to ground level.
assume no energy is lost by the softball while it is in the air. what is the kinetic energy of the softball as soon as it leaves your hand? answer in units of j.
what is the kinetic energy of the softball when it returns to your hand? answer in units of j.
what is the speed of the ball? answer in units of m per s.

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 statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these