Year 12 Test 1 Almiis

The average kinetic energy E of a gas molecule is given by the equation

E = ³/₂ kT

where T is the absolute (kelvin) temperature.

What are the SI base units of k ?

• kg^–1m^–1s²K

• kg^–1m^–2s²K

• kgms²K

• kgm^–2s²K

Which diagram does not represent R as two perpendicular components?

• 
• 
• 
• 

What is the value of n ?

• 0.5

• 1

• 3/2

• 2

What are the SI base units of Q?

• kg m²s^–3

• kg m^-3s^–1

• kg m^-4s^–1

• kg m^-2s^–2

Which diagram represents the vector (P – Q)?

• 
• 
• 
• 

What is a possible unit for the product VI, where V is the potential difference across a resistor

and I is the current through the same resistor?

• newton per second (N s^–1)

• newton second (N s)

• newton metre (N m)

• newton metre per second (N m s^–1)

.

• 0.6 ms^-1

• 2 ms^-1

• 4 ms^-1

• 6 ms^-1

What is the percentage uncertainty in the calculated value of W ?

• 6%

• 10%

• 16%

• 32%

If systematic errors cause t and h to be measured incorrectly, which error must cause g to

appear greater than 9.81 m s^–2?

• A h measured as being smaller than it actually is and t is measured correctly

• B h measured as being smaller than it actually is and t measured as being larger than it actually is

• C h measured as being larger than it actually is and t measured as being larger than it actually is

• D h is measured correctly and t measured as being smaller than it actually is

What is the cross-sectional area of the rod?

• 3.81 mm²

• 11.4 mm²

• 22.8 mm²

• 45.6 mm²