The specific heat and temperature change are related by the equation, the smaller the specific heat, then_________________
The less quickly the temperature can change.
No significant variation in temperature change.
The more quickly the temperature can change.
No such related equation.
Some spark plugs in cars are nothing more than metal contacts shaped like a letter ‘C’ separated by a specific distance. A spark jumps the distance, called the gap between the electrodes. When the engine heats up, including the spark plug, what happens to the size of the gap?
It increases
It decreases
It increases at first, then decreases effectively cancelling out any change once the engine reaches the operating temperatures.
It decreases at first, then increases effectively cancelling out any change once the engine reaches the operating temperatures
The relation between α : β : γ is _______________.
2: 3 : 1
1: 2: 3
2 : 1: 3
3 : 2 : 1
When mechanical work is done on a system, there can be an increase in
Its temperature
Its internal energy
Both temperature and internal energy
Neither temperature or internal energy.
Specific heat and calorific value of a substance are usually ________________
Same
Not same
Cannot be compared
None of these
When you touch a cold piece of ice with your finger, energy flows______________
From the ice to your finger
From your finger to the ice
Actually both way
From surroundings.
The mass of ice at 00C that can be melted using 1 gram of steam at 1000C is__________________
8 grams
0.125 gram
0.148 gram
6.75 grams
The food in a refrigerator is cooled by__________________
Vaporization of the refrigerating fluid.
Condensation of the refrigerating fluid.
The ice in your nearby freezer.
Liquidation of the refrigerating fluid
Pour a liter of water at 40oC into a liter of water at 20oC and the final temperature of the two becomes _____________
More than 30oC
Less than 30oC
At or about 30oC
May be less or more than 30oC
12.9 gram of an unknown metal at 26.5oC is placed in a cup containing 50.0 grams of water at 88.6oC. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1oC. Assuming all the heat lost by the water is gained by the metal and that the cup is perfectly insulated, determine the specific heat capacity of all the unknown metal. Sp. heat of water = 4.18 J/g/oC
2.49 J/g/oC
0.40J/g/oC
0.39J/g/oC
2.56J/g/oC
