9 A room's temperature is 20 degrees C. The pressure on the barometer states it is at 109KPa. The room is 20m by 20m by 5m. Find the number of moles of gas that are in the room. Answer in kilomoles and to two decimal places. Answer 89.49 Answer range +/- 0.1 10. A piece of glass is 1.5m by 2m that is 2.4cm thick. One side is exposed to a room at 18 degrees Celsius, the other is exposed to the outside air at 28 degrees Celsius. Thermal conductivity of glass is 0.8 Find the time it takes for the glass to allow 36,000 Joules of heat to enter the room. Answer 36 seconds. 11. A cube with dimensions of 10cm per side has a mass of 720g. It is placed in a liquid of density 900Kg/m3 Find how far below the liquid line the bottom the cube is. Answer in cm and to two decimal places. Answer 8 Answer range +/- 0.1 12. Water flows through a pipe on the ground with a pressure of 300KPa with a velocity of 3 m/s, it then travels up to a height of 10 meters where it has a velocity of 1.5m/s. Water has a density of 1000kg/m3. Find the pressure of the water in KPa at the final height. Answer 205.375KPa 13. A mass of 4Kg is attached to a spring that is stretched and released. The block takes (pi/2) seconds for one full oscillation. Find the value of the spring constant necessary for this to be true. Answer in N/m and to two decimal places. Answer 64 Answer range +/- 0.1