C-05 — State of Matter and Pressure

What is the SI unit of pressure?

Pressure is defined as —

The dimension of pressure is —

Pressure is a —

1 Pascal equals —

If the same force is applied through a smaller area, the pressure will —

Why can a sharp nail penetrate wood easily?

A person of mass 50 kg lies down on a floor with back area $0.5\,m^2$. What pressure is exerted? (Take $g = 9.8\,N/kg$)

The same person standing on legs of total area $0.03\,m^2$ exerts a pressure of —

Why should a person trapped in quicksand lie down?

Vector representation of pressure–force relation is given by —

The direction of the area vector is —

Density is defined as —

The SI unit of density is —

The dimension of density is —

Density of water is —

When temperature of a substance increases, its density usually —

0.25 kg salt dissolved in 1 kg water makes total volume 1200 cc. Density of the solution is —

Density of Dead Sea water is $1.24\,kg/L$. Volume of 1 kg Dead Sea water is —

The approximate density of nucleus is —

Radius of an atom compared to its nucleus is approximately —

The process by which water in a pot heats up uniformly is called —

Why does heated water rise to the top of a pot?

In summer, why is pond surface water hot but the bottom water cold?

Hot air balloons rise because —

Which gas is safest to fill a flying balloon though it is expensive?

A bad/rotten egg floats in water because —

Pressure at depth $h$ in a liquid of density $\rho$ is —

In a liquid of fixed density, pressure —

Approximately for every 10 m increase in depth in water, pressure increases by —

1 atm pressure equals —

A whale dives to 2100 m. Approximately how much pressure does it sustain? (1 atm per 10 m)

Divers descended 305 m. Pressure they had to tolerate —

Pressure at depth 50 cm in water (density $1000\,kg/m^3$) is —

Pressure at depth 50 cm in mercury (density $13600\,kg/m^3$) is —

At what depth of water will pressure equal 1 atm?

The depth of kerosene at which pressure is 1 atm is approximately —

Archimedes' principle states that a body immersed in a liquid loses weight equal to —

The upward force on a body immersed in a liquid is called —

For a cylinder of cross-section $A$ and height $h$ submerged in liquid of density $\rho$, the buoyant force equals —

Why is there no net horizontal force on a submerged cylinder from the surrounding liquid?

The buoyant force on a submerged body is directed —

A potato hanging on a rubber band is dipped in water. The rubber band —

Archimedes' crown weighs 10 kg in air and 9.4 kg in water. Density of crown is —

An object floats in liquid when —

An object will sink completely if —

A piece of wood (density $0.5 \times 10^{3}\,kg/m^3$) floats in water. What percent is immersed?

A wood half-immersed in river water. In sea water (density $1.03 \times 10^{3}\,kg/m^3$), what fraction is immersed?

If displaced water weight equals object weight, the object —

A piece of ice floats in a glass of water. After it melts, the water level —

Pascal's law states that pressure applied on a confined fluid —

In a hydraulic press, $A_2/A_1 = 100$. If $F_1 = 50\,N$, force on the bigger piston is —

In a hydraulic press, energy on the larger piston is —

Pascal's law is the principle behind —

If smaller piston (area $A_1$) moves $l_1$, the larger piston (area $A_2$) moves —

Pascal's law primarily multiplies —

Atmospheric pressure on Earth's surface is approximately —

Why don't we feel atmospheric pressure normally?

Astronauts wear pressure-protected suits in space because —

The weight of an air column on $1\,m^2$ at the surface is roughly —

After evacuating air from a thin tin casket, it gets twisted from all sides because —

Air pressure becomes half the surface value at a height of approximately —

Why can high planes not fly in space even though friction is less there?

At the peak of Mount Everest (≈8.85 km), oxygen is approximately —

Torricelli performed his air pressure experiment in —

In Torricelli's experiment, the mercury column stops rising at —

With water instead of mercury, the column would rise approximately —

Mercury rises 13.6 times less than water because —

The instrument used to measure atmospheric pressure is the —

When you sip a drink through a straw, the drink rises because —

The mercury barometer column rises above 76 cm when atmospheric pressure —

A "depression" in the sea in weather news means —

Wind flows from —

Molecular mass of water (18) compared to nitrogen (28) and oxygen (32) is —

Why does air density decrease when water vapor content increases?

A low barometer reading suggests —

The property that allows a substance to regain its shape after deformation is called —

Strain is —

The unit of strain is —

Stress is defined as —

The SI unit of stress is —

Hooke's law states that within elastic limit —

The constant of proportionality between stress and strain is called —

The unit of Young's modulus is —

If a substance has a higher Young's modulus, for the same applied stress its strain will be —

The point beyond which a substance does not return to its original shape is called —

Bulk modulus relates —

Steel is more elastic than rubber because —

Among the three states of matter, which can flow?

Liquids and gases together are called —

Which state has both definite shape and definite volume?

Which has definite volume but no definite shape?

Gas has —

In which state are molecules closest and almost in contact?

In gases, molecules —

According to molecular kinetic theory, gas pressure on container walls is due to —

When gas molecules hit a wall and rebound, they exert force because of —

Which Newton's law explains the wall pushing back on a gas molecule?

If temperature of a gas in a closed container increases, pressure —

Consider the following statements:

The fourth state of matter is —

Plasma is essentially —

Plasma can be created by —

A common everyday example of plasma is —

Plasma can be confined into a fixed shape using —

Stars contain matter mostly in which state?

Plasma is being researched for energy production through —

What is the name of the apparatus used to measure the atmospheric pressure?

The amount of liquid pressure is —

What is the name of the fourth state of matter?

If force F is applied on the free surface of a liquid container, this force —

A container of water has a column of height 0.1 m. The pressure at the bottom (taking $\rho_w = 1000\,kg/m^3$, $g = 9.8\,N/kg$) is —

Why is the density of a substance temperature dependent?

Why does strain have no unit?

A rubber band of natural length $L_0 = 10\,cm$ stretches to 25 cm with mass M, and returns to 10 cm after removal. Beyond what loaded length does the rubber band start showing permanent deformation, based on the table?

From the data table for the rubber band, the elastic limit corresponds to the load at which —

To determine density of a solid using a spring balance and water, after immersion the apparent decrease in mass (in grams) gives —

Is the vacuum above mercury in Torricelli's barometer truly a perfect vacuum?

The density of gold is $19.3\,g/cm^3$ means —

At the same depth, which liquid exerts more pressure: water or mercury, and why?

The reason behind an object floating or sinking is determined by —