Two cars are racing to an intersection. Car A is driving East at 90km/h and Car B is driving North East at 29m/s. Neither one is committed to stopping so a collision occurs and Car A ends up travelling 18m/s[E30°N]. If Car A has a mass of 2500 kg and Car B has a mass of 1800 kg, what is the final velocity of Car B? Is the collision elastic?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom