Answer: According to the question, the distance traveled by the oscillator in one time period = 4A Where A represents the amplitude of the oscillation Therefore, the required ratio becomes = 4A/A =...
Answer: Suppose that pi represents the pressure inside the balloon and po represents the pressure outside the balloon. Then the excess pressure can be written as: pi – po = 2T/r Where, T represents...
c) 1 g of water in the vapour state at 1 atm occupies 1601 cm3. Estimate the intermolecular distance at boiling point, in the vapour state. d) During vaporisation a molecule overcomes a force F,...
a) Estimate the energy required for one molecule of water to evaporate. b) Show that the inter-molecular distance for water is Answer : a) According to the question, the latent heat of vaporization...
Answer: (c) We know that - $ p={{p}_{0}}{{e}^{\left( -\frac{{{\rho }_{0}}gh}{{{p}_{0}}} \right)}} $ By substituting the known values, we can determine that h = 18.43 km (d) For $ \rho \alpha p $ to...
Answer: (a) The pressure falls as we ascend higher because the thickness of the gas above us diminishes. Let A be the cross-section of the air's horizontal layer, and dh be its height. The pressure...
Answer: According to the question, the surface tension of water is T = 7.28 × 10-2 N/m and the vapour pressure is P = 2.33 × 103 Pa Let r represent the radius of the drop The excess pressure that is...
Answer: The volume of a drop of liquid with a radius of R = (N) (volume of a liquid droplet of radius r) $ \frac{4}{3}\pi {{R}^{3}}=N\times \frac{4}{3}\pi {{r}^{3}} $ $ N=\frac{{{R}^{3}}}{{{r}^{3}}}...
Answer : The two drops should combine to make a larger drop in order to conserve volume. The radius of smaller drop is given as follows: r1 = 0.1 cm = 10-3 m Also, the radius of the bigger drop is...
Answer: Let m be the mass of an elementary oil particle. The balancing forces are angled in the surface's direction. Pseudo force is given by ma mg represents the height of a small part of the oil...
Answer: according to the question, the radius is r = 2.5 × 10-5 m The surface tension is T = 7.28 × 10-2 N/m It is also given that the angle of contact is θ = 0 degrees and the density is ρ = 103...
Answer : Let ρ represent the density of a block and let height of the block be L Then, we can write the expression for the mass of the block as follows: m = Vρ = L3ρ Then, the weight of the block is...
Answer : Let ρ represent the density of a block and let height of the block be L Then, we can write the expression for the mass of the block as follows: m = Vρ = L3ρ Then, the weight of the block is...
Answer: We know that the upthrust of the block is equal to the weight of water displaced. The expression of which can be written as follows Vρwg Let x represent the compression in the spring. So,...
Answer: According to the question, the density of ice is ρice = 0.917 g/cm3 The density of water is ρwater = 1 g/cm3 Let Vi represent the volume of the iceberg and Vw denote the volume of the water...
Answer: Surface tension is a scalar quantity as it has a specific direction. Surface tension is given by the expression : σ = W.D / Change in surface area As it is equal to the work done per unit...
Answer: Viscosity is not a vector quantity. Viscosity is a liquid attribute that's equal to the amount of dragging force per unit area between two liquid layers with the same velocity gradient. As a...
a) high density b) high viscosity c) low density d) low viscosity Answer: The correct options are : b) high viscosity c) low density Explanation: Streamline flow is highly likely for liquids with...
a) gases decreases b) liquids increases c) gases increases d) liquids decreases Answer: The correct options are : c) gases increases d) liquids decreases Explanation : Because the viscosity of...
The distance l and h are shown in the figure. After some time the coin falls into the water. Then a) l decreases b) h decreases c) l increases d) h increases Answer: The correct options are : a) l...
a) it is the ratio of force to the area and both force and area are vectors b) it is the ratio of the magnitude of the force to area c) it is the ratio of a component of the force normal to the area...
a) the net force on it is zero b) there is a net downward force c) the potential energy is less than that of a molecule inside d) the potential energy is more than that of a molecule inside Answer:...
a) water b) ethyl alcohol c) mercury d) methyl iodide Answer : The correct answer c) mercury If the contact angle is obtuse, the liquid meniscus in a capillary tube will be convex upwards. When one...
a) 9:4 b) 3:2 c) √3: √2 d) √2: √3 Answer: The correct answer a) 9:4 $ {{A}_{1}}{{v}_{1}}={{A}_{2}}{{v}_{2}} $ $ \frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{A}_{1}}}{{{A}_{2}}}={{\left(...
a) the velocity of a fluid particle remains constant b) the velocity of all fluid particles crossing a given position is constant c) the velocity of all fluid particles at a given instant is...
The correct answer is d) Lines of flow do not intersect each other.
Answer: The correct answer is c)
Answer : Answer : (a) If dissipative forces exist, some forces in the liquid flow due to pressure difference are expended against dissipative forces, resulting in a high-pressure drop. (b) Due to...
Answer : Given: according to the question, the maximum mass that can be lifted is given as m = 3000 kg and the area of a cross-section of the load-carrying piston is A = 425 cm2 = 425 × 10-4 m2...