A box with a total surface area of 1.47 m2 and a wall thickness of 3.91 cm is made of an insulating material. A 15.9 W electric heater inside the box maintains the inside temperature at 8.4 ◦C above the outside temperature. Find the thermal conductivity of the insulating material. Answer in units of W/m · ◦ C.

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?