Asubmarine sends a signal and receives an echo after 5 seconds. calculate the speed of sound if distance of object from submarine in 3625m.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

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?