High School   Science


Topic Replies Activity
What do you mean by geo-stationary satellite? Explain? 2 November 10, 2018
Explain why the moon has no atmosphere? 2 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 November 10, 2018
Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness? 2 November 10, 2018
What will happen to the value of ‘g’ if the earth stops rotating? 2 November 10, 2018
Why are roads banked on curved path? 2 November 10, 2018
Explain why a cyclist bend while going along curved road? 2 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 November 10, 2018
When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why? 2 November 10, 2018
How will you justify that stone is more rigid than iron? 2 November 10, 2018
If a cork is released from the bottom of a jar filled with water, what will happen and why? 2 November 10, 2018
How will you make difference between density and specific gravity of a body? 2 November 10, 2018
A cork is floating in water. What is the apparent weight of the cork? 2 November 10, 2018
A helium filled balloon rises to a certain height and then halts. Why? 2 November 10, 2018
What are centre of buoyancy andmetacentre? 2 November 10, 2018
State the laws of flotation 2 November 10, 2018
Does a ship sink more in river water or in sea water? Explain 2 November 10, 2018
Why is the bottom of a ship made heavy? 2 November 10, 2018
Why does ice float in water? 2 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 November 8, 2018
How does K.E. of an object change if its momentum is doubled? 2 November 8, 2018
Distinguish between conservative and non-conservative force 2 November 8, 2018
Differentiate between conservation of kinetic energy and conservation of linear momentum 2 November 8, 2018
What is meant by elastic and inelastic collision? 2 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 November 8, 2018
Why is it easy to pull a lawn roller than to push it? 2 November 8, 2018
When a large heavy truck collides with a passenger car, the occupants of the car are more likely to be hurt than the truck driver. Why? 2 November 8, 2018
Coin over cardboard, under glass falls in glass when cardboard is pulled 2 November 8, 2018
Why is the kinetic friction less than the limiting friction? 2 November 8, 2018
Explain how Newton’s first law of motion follows from the second law 2 November 8, 2018