Complete the following sentence:
When ice melts its volume ______ and density _______.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
Equal volumes of alcohol and mercury are heated uniformly in identical containers separately from 10°C to 50°C. Will both the liquids occupy the same volume? Give reason.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
Name two substances which expand on heating.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
Describe an experiment to demonstrate the thermal expansion of solids.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
'The coefficient of linear expansion for metal is 0.000016 per °C'. Explain the meaning of the statement.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
Show by an experiment that the real expansion of a liquid is equal to the sum of its apparent expansion of a liquid is equal to the sum of its apparent expansion and the volume expansion of the vessel containing the liquid.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
State the volume changes that you will observe when a given mass of water is heated from 0°C to 10°C. Sketch a temperature-volume graph to show the behavior.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
State three advantages of using mercury in a thermometer liquid.
[5] Heat and Energy
Chapter: [5] Heat and Energy
Concept: undefined >> undefined
What do you understand by the average speed of a body?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Do speed and average speed of a body have the same meaning?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Which is greater?
(i) 60 km/hr
(ii) 15 m/s
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Convert 20 m/s into km/hr.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Which is greater?
(i) 36 km/hr
(ii) 8.5 m/s
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Arrange the following speeds in the increasing order:
(i) A bicycle moving with a speed of 36 km/h.
(ii) A car moving with a speed of 2 km/min.
(iii) An athlete running with a speed of 7 m/s.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
A boy covers half of his journey with a uniform speed of u and the other half with a uniform speed of v. What is the average speed for the whole journey?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
Does uniform speed mean constant speed?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
A body goes from P to Q with a uniform speed of u and immediately returns back to P at a uniform speed of v. What is the average speed for the whole journey?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
A car travels from P to Q at a uniform speed of 20 ms-1 and immediately turns back and travels towards Q with a uniform speed of 30 ms-1. What is the average speed for the whole journey?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
The relation S= v x t can easily be used to find the tota l distance covered by a body moving with non -uni form speed. (Yes/ no)
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
A quantity is measured to be -30 m/s. Is it speed or velocity?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
Concept: undefined >> undefined
