Gaseous Pressure

Q. How does the atmospheric pressure change with altitude?

1. altitude increases, pressure decreases
2. altitude decreases, pressure decreases
3. altitude is independent of pressure
4. altitude increases, pressure increases

Q. How does atmospheric pressure change with the change in altitude

1. pressure increases
2. pressure decreases
3. pressure remains same
4. cant say

Q.

A hydrogen balloon rises in air because :

1. Density of hydrogen > density of air.

2. Density of hydrogen = density of air.

3. Density of hydrogen < density of air.

4. None of the above

Q. Fill in the blank.

1. increases
2. decreases
3. may increase or decrease
4. remains constant

Q. An object of specific gravity $\rho$ is hung from a massless string. The tension of a string is T. The object is immersed in water so that one half of its volume is submerged. The new tension in the string is

1. $\left(\frac{2\rho +1}{2\rho }\right)r$
2. $\left(\frac{2\rho -1}{2\rho }\right)r$
3. $\left(\frac{\rho -1}{\rho }\right)r$
4. $\left(\frac{\rho +1}{\rho }\right)r$