50 questions · timed · auto-graded
A metal in which even iron can float is:
Consider the following information in respect of four objects A, B, C and D:
| Object | Density (kg/m3) | Volume (m3) | Mass (kg) |
| A | - | 2 | 4000 |
| B | 8000 | 4 | - |
| C | 2000 | - | 1000 |
| D | - | 4 | 2000 |
Which object would float on water?
The atmosphere consisting of a large number of gases is held to the earth by:
The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid?
An object weighs 10N in air. When immersed fully in a liquid, it weighs only 8N. The weight of liquid displaced by the object will be:
The value of g on the surface of the moon:
The force of attraction between two unit point masses separated by a unit distance is called:
An object weighs 10 N in air. When immersed fully in water, it weighs only 8N. The weight of the liquid displaced by the object will be:
According to one of the Kepler's laws of planetary motion:
The atmosphere is held to the earth by:
Four balls, A, B, C and D displace 10mL, 24mL, 15mL and 12mL of a liquid respectively, when immersed completely. The ball which will undergo the maximum apparent loss in weight will be:
Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become:
A rectangular wooden block has length, breadth and height of 50 cm, 25cm and 10cm, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?
A girl stands on a box having 60cm length, 40cm breadth and 20cm width in three ways. In which of the following cases, pressure exerted by the brick will be:
The value of acceleration due to gravity: