Ametal foil has a threshold frequency of 5.45×1014 hz . which of the colors of visible light have enough energy to eject electrons from this metal?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?