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WorksheetsSHC and Energy transfers
Total questions: 21
Worksheet time: 17mins
The energy store in stretched or compressed objects
Elastic
Kinetic
Chemical
Thermal
The energy store in food and fuel
Chemical
Thermal
Potential
Calories
This quantity is a measure of the average kinetic energy of the individual particles in the object
specific heat capacity
temperature
volume
heat
What causes the transfer of thermal energy?
temperature difference
temperature
radiation
conduction
If two objects have different temperatures, energy is transferred from the warmer object to the cooler one UNTIL ...
one reaches a temperature of zero
they both have an equal temperature
one runs out of energy
When energy is transferred from one particle of matter to another without the movement of the matter it is called
conduction
convection
radiation
When energy is transferred by the movement of currents within a fluid it is called
conduction
convection
radiation
The transfer of energy by electro-magnetic waves is called
conduction
convection
radiation
What is the formula to calculate the energy (Q) required to raise the temperature (T) of a mass (m) of a substance?
Q=mc∆T
Q=mc
Q= ½mv2
m=QC
What is the unit of specific heat capacity?
J/ kg/ oC
J kg oC
J/ kg
J/ oC
When a piece of aluminium foil is taken out of the oven and cools from 100°C to 50°,C What is the change in temperature?
-50 °C
0 °C
50 °C
150 °C
The shc of a substance is 1000 J/ kg/ oC. If 0.5 kg is heated so its temperature increases from 20 oC to 220 oC. Calculate the energy needed for this temperature increase.
100 J
100 kJ
100 000 KJ
200 000 J
Two ice cubes of equal mass and surface area are taken out of the freezer at the same time: one is placed on a plastic tray and one on an aluminium tray. In which direction is energy transferred?
tray to ice cube
ice cube to tray
Two ice cubes of equal mass and surface area are taken out of the freezer at the same time: one is placed on a plastic tray and one on an aluminium tray.
Why does the ice on the aluminium melt more quickly?
Aluminium is a better conductor than plastic
The plastic tray is colder than the aluminium tray
The aluminium tray is colder than the plastic tray
To measure the rate of transfer of energy to the immersion heater, which two quantities do you need to measure?
Current through the heater and voltage across the heater
Current through the resistor and voltage across the resistor
Temperature and mass
Current through the heater and time heating
The metal block is heated and its temperature is plotted against time. What is the gradient of the line of best fit?
19.2
0.028
25/200
Calculate the energy transferred to the heater in 1 second if there is a voltage of 8.0 V across the heater and a current of 2.0 A flows through it.
16 J
4.0 J
0.25 J
32 J
4000 J of energy is supplied to the metal block causing its temperature to rise by 8 oC. Calculate the specific heat capacity of the metal if its mass is 500 g.
1000 J/ kg/ oC
10 J/ kg/ oC
16 000 000 J/ kg/ oC
1000 J/ kg
What is the most significant source of error in this method?
Energy losses to the atmosphere
Fluctuations in the current and voltage
Parallax error when reading the temperature
Energy losses in the wires and resistor
Why is there a cool sea breeze?
Water has a lower specific heat capacity than land
Water has a higher specific heat capacity than land
Which has more thermal energy? A cup of freshly made tea or the school swimming pool?
Swimming pool
Freshly made tea
