Planck's law led to a fundamental change in our thinking about nature of light, what is it? 12. what is "ultraviolet catastrophe"? 13. what the classic physics predicted to be the relation between frequency of black body radiation and its intensity?

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Which one of the following research methods can show cause and effect

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water