The graph below shows the motion of a ball rolling on a straight track. What was the ball's average speed during the time represented in the graph?

Which is mostly likely why many scientists reject the cold fusion theory

What shape would a molecule with two bound groups and two lone pairs have?

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?