Which phenomenon caused scientists to rethink their understanding of light as a wave?
O A. Blackbody radiation
B. Quantum mechanics
O C. Doppler effect
D. Emission spectra

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.

Look at the diagram of the food web. the arrows mean “eaten by.” what will happen if the number of snakes goes down?