If an object moved in the same direction and at a constant speed for 4 hours, which of the following is true?
a. the object's speed changed during the 4 hours
b. the object; s velocity did not change
c. the object accelerated during the 4 hours
d. the object decelerated during the 4 hours

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

The flow of electrons from one atom to another is called

Consider the phase change taking place in the picture. you could use all but one statement to describe what is happening here. that is: a) temperature is increasing. b) kinetic energy is increasing. c) the space between the particles remains the same. d) the attractive force between the particles is decreasing.