What is the r value of material with a thermal conductivity of 2.0 and is 4 inches thick?

What fluid that reduces the size of fat droplets? Can a black light detect seamen? What energy transformation is it when sunlight shines on a tree? What is the work done by the field of a nucleus in a complete circular orbit of the electron. what if the orbit is elliptical? What parts failed at Three Mile Island? What do you call a circuit that has only one path? How does size affect free falling? How much did the Romans shield weigh? The three types of radiation were first identified by? Convert 9.0eV into joules? What is linin why is it done? What is an object's overall change in position called? What is the definition of vaccume? Adding energy to a solid gold bar may result in what outcome? How do you make fossil fuels create heat? What does perspiritation mean? When dropped why does your 1963 quarter dollar sound different from other quarters? What does and .38 brass casing weigh? Is electrostatic force a vector quantity? a passenger elevator travels from the first floor to the 60th floor, a distance of 210 m, in 35 s. what is the elevator’s speed?

What is the r value of material with a thermal conductivity of 2.0 and is 4 inches thick?