Density
Q1.
A student wants to calculate the density of the two objects shown in the figure below.
 
© Whitehoune/iStock/Thinkstock,      © Marc Dietrich/Hemera/Thinkstock
Describe the methods that the student should use to calculate the densities of the two objects.
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(Total 6 marks)
Q2.
The figure below shows a balloon filled with helium gas.
 
(a)     Describe the movement of the particles of helium gas inside the balloon.
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(2)
(b)     What name is given to the total kinetic energy and potential energy of all the particles of helium gas in the balloon?
 
Tick one box.	 	
External energy	 	
Internal energy	 	
Movement energy	 	
(1)
(c)     Write down the equation which links density, mass and volume.
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(1)
(d)     The helium in the balloon has a mass of 0.00254 kg.
The balloon has a volume of 0.0141 m3.
Calculate the density of helium. Choose the correct unit from the box.
 
m3 / kg                              kg / m3                              kg m3	
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Density = __________________ Unit _________
(3)
(Total 7 marks)