A brick of mass m has sides of lengths a, b and c, where a < b < c. The brick is placed on a horizontal table such that the pressure it exerts on the table is a maximum.

What is the maximum pressure p acting on the table?

The derivation of the pressure equation ∆p = $\rho$ g∆h uses a number of relationships between

quantities.

Which relationship is not used in the derivation of this equation?

A submarine has circular windows of diameter 0.30 m. The windows can experience a maximum external pressure of 660 kPa before they crack.

What is the minimum external force needed to crack the windows?

A giant squid of length 20.0m is vertical in seawater, with the top of the squid at a depth of 8.00 m. The density of seawater is 1,050 kg m^–3.

What is the difference in pressure between the top and the bottom of the squid?

The speed v of a liquid leaving a tube depends on the change in pressure ∆P and the density ρ of the liquid. The speed is given by the equation

where k is a constant and has no units.

What is the value of n?

Which of the following shows the correct base units for pressure?

An object, immersed in a liquid in a tank, experiences an upthrust.

What is the physical reason for this upthrust?

Atmospheric pressure at sea level has a value of 100 kPa.

The density of sea water is 1,020 kg m^–3.

At what depth in the sea would the total pressure be 110 kPa?

A cylindrical block of wood has cross-sectional area A and weight W. It is totally immersed in water with its axis vertical. The block experiences pressures p_t and p_b at its top and bottom surfaces respectively.

Which expression is equal to the upthrust on the block?