A cell makes an electric current flow through a lamp. Two ammeters are connected to measure the current flowing to and from the lamp. a) what can you say about the readings on both of the ammeters? b) an ammeter is removed and a voltmeter is added- draw the new circuit diagram

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). light from a hydrogen lamp illuminates a diffraction grating with 520lines/mm , and the light is observed on a screen 1.5m behind the grating. part a what is the distance between the first-order red and blue fringes? express your answer to two significant figures and include the appropriate units.

Phase changes are chemical changes. true or false

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.