A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
Energy consumed by the household = 250 units
1 unit of energy = 1 kWh = 3.6 x 106 J
∴ 250 units of energy = 250 x 3.6 x 106
= 9 x 108 J.
Convert the following temperature to Celsius scale.
300K
Convert the following temperature to Celsius scale.
573 K
Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
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