List of top Physics Questions on Density and Pressure

Equal masses of two substances of densities _1 and _2 are mixed. Density of mixture is:
A submarine is designed to withstand an absolute pressure of 100 atm. How deep can it go below the water surface? (Consider the density of water = 1000 kg m⁻³, 1 atm = 1 $\times$ 10⁵ Pa and g = 10 m/s²)

एक गतिपालक चक्र (फ्लाई व्हील) की कोणीय चाल 10 s में 600 rpm से 1200 rpm तक बढ़ाई जाती है। इस समय के दौरान, गतिपालक चक्र द्वारा पूर्ण (पूरे) किए गए परिक्रमणों की संख्या है: 
 

5.580 kg द्रव्यमान के धात्विक घन की प्रत्येक भुजा 9.0 cm मापी गई है। सार्थक अंकों को ध्यान में रखते हुए, घन के पदार्थ का घनत्व सबसे अच्छी तरह से x x \(10^3\) kg m\(^{-3}\) में अभिव्यक्त किया जा सकता है, जहाँ X का मान है: 
 

The coefficient of volume expansion of glycerine is $ 49 \times 10^{-5} \, \text{K}^{-1} $. The percentage change in its density for a $ 50^\circ \text{C} $ rise in temperature is
The density of a substance is 4 g/cc. In a system in which the unit of length is 5 cm and the unit of mass is 20 g, the density of the substance is:
Whales can dive undersea to depths of 2 km. The pressure on the whale at this depth (ignoring atmospheric pressure) is _____ $× 10^6 Pa$. (Density of sea water = $1 g cm^{-3}$ and $g =10 m s^{-2}$)
Given below are two statements:
Statement - I: The zero-air curve is non-linear.
Statement - II: The dry density at 100% saturation is non-linear function of void ratio.
In the light of the above statements, choose the correct answer from the options given below :
The change in density of mercury when it is heated from 10 °C to 60 °C. (The coefficient of volume expansion of mercury is \(18.2 \times 10^{-5} \, \text{K}^{-1}\))
Water flows in a horizontal pipe in a streamlined manner at an absolute pressure of \(4 \times 10^5 \, \text{Pa}\) and speed of \(6 \, \text{m/s}\). If it exits the pipe at a pressure of \(10^5 \, \text{Pa}\), the speed of water at the exit point is .......... m/s (Round off to 1 decimal place).
(The density of water is \(1000 \, \text{kg/m}^3\))
Find density of ethanol
Find density of ethanol
In the given (V-T) diagram, what is the relation between pressures $P_1$ and $P_2$ ?