A 1000-kg car collides head-on with a 2500-kg van that is initially traveling at 20 m/s. The two vehicles stick together and come to rest immediately as a result of the collision. Calculate the initial speed of the car. PLS EXPLAIN HOW ALSO

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

=force × distance a. work b. velocity c. pressure d. momentum

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.