Advertisements
Advertisements
प्रश्न
It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.
पर्याय
True
False
Advertisements
उत्तर
False.
It is not easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.
APPEARS IN
संबंधित प्रश्न
A plane is in level flight at a constant speed and each of its two wings has an area of 25 m2. If the speed of the air is 180 km/h over the lower wing and 234 km/h over the upper wing surface, determine the plane’s mass. (Take air density to be 1 kg m–3).
Water in a lake exerts pressure only at its bottom.
The unit of thrust is ..........
A gum bottle rests on its base. If it is placed upside down, how does the thrust change?
A boy weighing 60 kgf stands on platform of dimensions 2.5 cm x 0.5 cm. What pressure in pascal does he exert?
A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will
Water flows through a horizontal tube of variable cross section. The area of cross section at A and B are 4 mm2 and 2 mm2 respectively. If 1 cc of water enters per second through A, find (a) the speed of water at A, (b) the speed of water at B and (c) the pressure difference PA − PB.
The pressure in mines is ______ than the sea level.
The force exerted by liquid perpendicular to the surface of the body is equal to the product of ______ at that point.
Iceberg floats in water with part of it submerged. What is the fraction of the volume of iceberg submerged if the density of ice is ρi = 0.917 g cm–3?
