Ian walks 2km to his best friends house, the. walks .5km to the library. then makes a 2.5 km walk home. the entire walk took 3 hours. what is his average speed in km/h?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

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.

Explain why electric current cannot exist if a current doesn't have a voltage source.