Assuming that the pressure of the air remains constant, what is the volume of the air at a temperature of 87 °C? A fixed mass of gas is trapped in to a syringe. The gas has a pressure of 1.63 x 105 Pa when it has a volume of 3.0 cm3 and a temperature of 22 °C. The gas is then heated it has a uniform temperature of 57 °C. What will be the pressure of the gas if the volume of the gas is increased to 5.0 cm3? Answers Weight (p4 5) (a) 30 N (a) 372 N – 1 N 2418 N Mass is a measure of how 650 N 372 N much of an object is there. 12 000 N 0 N It is measured in kg. Weight is a downward The weight of the space 75 kg force caused by gravity. shuttle decreases. It is measured in N. This is because: Saturn There is less mass due to (a) 30 N fuel being used up. (a) 13 N kg-1 2.25 N The shuttle is getting 30 kg further away from the Person pushes down on 30 kg surface of the Earth. scales. Scales push back 8 N kg-1 up on person. 26 N kg-1 85 kg Work Done (p6 7) –
Assuming that the pressure of the air remains constant, what is the volume of the air at a temperature of 87 °C? A fixed mass of gas is trapped in to a syringe. The gas has a pressure of 1.63 x 105 Pa when it has a volume of 3.0 cm3 and a temperature of 22 °C. The gas is then heated it has a uniform temperature of 57 °C. What will be the pressure of the gas if the volume of the gas is increased to 5.0 cm3? Answers Weight (p4 – 5) Mass is a measure of how much of an object is there. It is measured in kg. Weight is a downward force caused by gravity. It is measured in N. (a) 30 N 2.25 N 30 kg 30 kg 8 N kg-1 26 N kg-1 (a) 30 N 1 N 650 N 12 000 N The weight of the space shuttle decreases. This is because: There is less mass due to fuel being used up. The shuttle is getting further away from the surface of the Earth. 85 kg (a) 372 N 2418 N 372 N 0 N 75 kg Saturn (a) 13 N kg-1 Person pushes down on scales. Scales push back up on person. Work Done (p6 – 7)
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