|
What is pasteurization?
|
|
2
|
218
|
January 3, 2019
|
|
Why is it difficult to run fast on sand?
|
|
3
|
517
|
January 3, 2019
|
|
Why do we slip on a rainy day?
|
|
3
|
235
|
January 3, 2019
|
|
If the sun somehow collapsed to form a black hole, what effect would this event have on the orbit of the earth?
|
|
2
|
215
|
November 10, 2018
|
|
What do you mean by geo-stationary satellite? Explain?
|
|
2
|
169
|
November 10, 2018
|
|
Explain why the moon has no atmosphere?
|
|
2
|
183
|
November 10, 2018
|
|
How does ‘g’ at a point vary with distance from the centre of the earth? Where is the highest value of ‘g’? Explain
|
|
2
|
170
|
November 10, 2018
|
|
Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness?
|
|
2
|
152
|
November 10, 2018
|
|
What will happen to the value of ‘g’ if the earth stops rotating?
|
|
2
|
171
|
November 10, 2018
|
|
Why are roads banked on curved path?
|
|
2
|
214
|
November 10, 2018
|
|
Explain why a cyclist bend while going along curved road?
|
|
2
|
236
|
November 10, 2018
|
|
A solid tied at the end of a string is revolved in vertical. At what point the tension in the string will be the greatest?
|
|
2
|
170
|
November 10, 2018
|
|
When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why?
|
|
2
|
245
|
November 10, 2018
|
|
How will you justify that stone is more rigid than iron?
|
|
2
|
206
|
November 10, 2018
|
|
If a cork is released from the bottom of a jar filled with water, what will happen and why?
|
|
2
|
195
|
November 10, 2018
|
|
How will you make difference between density and specific gravity of a body?
|
|
2
|
160
|
November 10, 2018
|
|
A cork is floating in water. What is the apparent weight of the cork?
|
|
2
|
167
|
November 10, 2018
|
|
A helium filled balloon rises to a certain height and then halts. Why?
|
|
2
|
179
|
November 10, 2018
|
|
What are centre of buoyancy andmetacentre?
|
|
2
|
139
|
November 10, 2018
|
|
State the laws of flotation
|
|
2
|
168
|
November 10, 2018
|
|
Does a ship sink more in river water or in sea water? Explain
|
|
2
|
140
|
November 10, 2018
|
|
Why is the bottom of a ship made heavy?
|
|
2
|
145
|
November 10, 2018
|
|
Why does ice float in water?
|
|
2
|
184
|
November 10, 2018
|
|
The earth moving round the sun in an orbit is acted upon by a force; hence the work must be done on the earth by this force
|
|
2
|
214
|
November 8, 2018
|
|
How does K.E. of an object change if its momentum is doubled?
|
|
2
|
145
|
November 8, 2018
|
|
Distinguish between conservative and non-conservative force
|
|
2
|
146
|
November 8, 2018
|
|
Differentiate between conservation of kinetic energy and conservation of linear momentum
|
|
2
|
182
|
November 8, 2018
|
|
What is meant by elastic and inelastic collision?
|
|
2
|
144
|
November 8, 2018
|
|
In a siphon, water is lifted above its original level during its flow from one container to another, where does it get the needed potential energy from?
|
|
2
|
374
|
November 8, 2018
|
|
Why is it easy to pull a lawn roller than to push it?
|
|
2
|
149
|
November 8, 2018
|
