Billy tapped the ruler and it made a funny noise. Billy heard the sound because the ruler vibrated
forth.
molecules back and
the air
his ear
the table
his finger

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Atomic nuclei of almost all elements consist of