Suppose that a piece of polystyrene insulation board has a thermal conductivity of k= 0.04 W/m. K.
In comparison, copper has a thermal conductivity of about 400
W/m. K. If you want to make a wall of copper
that provides the
insulation as a 4-cm polystyrene board, how thick does the
wall have to be (in meters)?
same
copper

Evaluate this exponential expression,8. (2 + 3)2 – 42

Listen base your answer to the question on the information below. propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below. c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol. what is the correct structural formula for a molecule of methanethiol

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2