When object 1 came into contact with object 2, object 2 got warmer. what can be concluded about the objects before they came into contact with each other?

object 2 did not have thermal energy.
object 1 had faster-moving particles
object 1 had less thermal energy
object 2 had fewer particles

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

How many neutrons does plutonium -196 with an atomic number of 78.