Buoyant force is caused by the displacement of the fluid and is proportional to the density of the fluid. A vacuum is the absence of matter, and therefore, there is no fluid to exert a buoyant force.
An object weighs maximum in
Asked in JPSC CS Prelims 2011 · Topic: Mechanics (Fluid Statics and Dynamics (Continuity Equation, Bernoulli's Theorem))
More Physics questions
- Consider the following statements : Statement-I: Assertion (A) : The stream of water flowing at high speed from a garden hose pipe tends to spread like a fountain when held vertically up, but tends to narrow down when held vertically down. Statement-II: Reason (R) : In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant. Choose the correct answer from the options given below :
- $\frac{p}{\rho} + hg + \frac{1}{2} = \text{constant}$ is the mathematical statement of ___.
- A deep sea diver may hurt his ear drum during diving because of
- A container is first filled with water and then the entire water is replaced by mercury. Mercury has a density of 13·6 × 10³ kg/m³. If X is the weight of the water and Y is the weight of the mercury, then
- Whether an object will float or sink in a liquid, depends on
- Which of the following statements about a fluid at rest in a cup is/are correct ? 1. Pressure is same at all the points in the fluid. 2. Pressure is exerted on the walls. 3. Pressure exists everywhere in the fluid. Select the correct answer using the code given below :
- All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is
- A wooden box of mass 2 kg and dimensions (30 cm $\times$ 15 cm $\times$ 10 cm) is placed on a table with sides 30 cm and 10 cm touching the tabletop. Which one of the following is the approximate pressure exerted on the table?