43. which temperature change would cause a sample of an ideal gas to double in volume while the pressure is held constant? (1) from 400.k to 200.k
(2) from 200.k to 400.k
(3) from 400.oc to 200.oc
(4) from 200.oc to 400.oc

Which suspect most likely committed the robbery and how do you know

Light waves travel than sound waves.

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?