# Search results

1. ### Bernoulli's Equation- on a jet nozzle

Homework Statement A jet of liquid of density ρ surrounded by air flows vertically downwards from a nozzle of area Ao. The stagnation pressure of the jet at exit from the nozzle is po and the surrounding air is at pressure B. The acceleration due to gravity is g. If the jet flow is...
2. ### Momentum and continuity equation

Homework Statement Follow the link to see the question, http://img507.imageshack.us/img507/2246/fluidquestion.png [Broken] Homework Equations The Attempt at a Solution currently I can't do part a) but from using part a) I can obtain the forces acting on the cone by using...
3. ### Heat transfer- determine heat of chip using convection

Homework Statement A silicon chip measuring 5mm by 6mm and of thickness 1mm is embedded in a ceramic substrate. At a steady state, the chip has an electrical power input of 0.3W. The top surface of the chip is exposed to a coolant whose temperature is 20°C. The heat transfer coefficient for...
4. ### Fluid mechanics- Dimensional analysis

Homework Statement The drag force F on a car depends upon its speed V, length L, the density ρ of the air and the dynamic viscosity of the air µ . Show that this statement regarding five physical quantities can be re-written in terms of two independent non-dimensional groups...
5. ### No Idea how to work this out! - Charging and discharging an iPod

No Idea how to work this out! -- Charging and discharging an iPod Homework Statement It takes about 5 hours for a fully charged ipod nano to run out of power when its screen is left on and all other functions are switched off. Subsequently, it takes about 90 minutes to recharge the ipod...
6. ### Help needed for this question - Air pressure in a bike tire

Help needed for this question -- Air pressure in a bike tire Homework Statement The Pressure gauge on a bike pump reads 8 bar at sea level on a day when the temperature is 21°C. Assume that the gas constant for air is 286.9 J/Kg K a) What is the density of the air in the tyre? b) What is the...