Advertisements
Advertisements
प्रश्न
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
Advertisements
उत्तर
It is easier to cut with a sharp knife because even a small thrust causes great pressure at the edges and cutting can be done with less effort.
APPEARS IN
संबंधित प्रश्न
The weight of a body floating in a liquid is ........
What is the unit of relative density?
How does the density of a body and that of a liquid determine whether the body will float or sink into that liquid?
Why does it happen?
A ship dips to a larger depth in fresh water as compared to marine water.
In what direction and at what point does the buoyant force on a body due to a liquid act?
What is meant by the term buoyancy?
Define upthrust and state its S.I. unit.
Two spheres A and B, each of volume 100 cm3 is placed on water (density = 1.0 g cm−3). The sphere A is made of wood of density 0.3 g cm−3 and sphere B is made of iron of density 8.9 g cm−3.
- Find:
- The weight of each sphere, and
- The upthrust on each sphere.
- Which sphere will float? Give reason.
Figure shows the same block of wood floating in three different liquids A, B and C of densities ρ1, ρ2 and ρ3 respectively. Which of the liquid has the highest density? Give a reason for your answer.
