Aconstruction worker uses an electrical device to attract fallen nails and sharp objects from a construction site. what is causing the attraction of the metal objects?

an electrical wave oscillating perpendicular to the electrical device.
an electrical charge radiating perpendicular to the wire
a magnetic wave radiating perpendicular to an electrical device
a magnetic wave and electrical current moving in opposite directions

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

The receptor cells that convert light energy into neural signals are called