When methane combines with oxygen, carbon dioxide and water are produced. how many methane molecules are needed to complete this model and obey the law of conservation of matter? conservation of matter?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Does heating a metal wire increase or decrease its electrical resistance? why?

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.