What is an example of reflection?

a.)a jet plane creating a sonic boom

b.(a straw appearing bent in water

c.)a sound wave echoing in a valley

d.)a sound wave traveling around a
corner

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

The metric unit of electrical power is the watt volt ampere ohm

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?