Calculate the force off earth's gravity on a spacecraft 12,800 km above the earth's surface if its mass is 1350 kg

Which agents contribute to erosion? sunlight. shorelines. moving water. ice and glaciers. humans and animals.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Hurricanes a. usually form over land b. usually intensify over land c. gain strength from ocean heat d. usually form over the poles