Recent content by Mech. Engineer

  1. M

    Can temperature be expressed in terms of mass, displacement, time, and charge?

    can you express length unit (m) in terms of the other units? the same with temp.
  2. M

    Newbie Needs Help: If F=ma, what gives?

    that means zero mass is accelerated... ok i have another tricky question in the same issue for you... and it tests your understanding in this subject... if you drive your car with constant speed 120 km/h...with zero acceleration... that means you have zero force... is not...
  3. M

    Calculate Water Flow in 10mm Pipe w/ 5 Bar Pressure

    the velocity is taking care of pressure here... flow=area*velocity Bernoulli relates the velocity with the pressure...
  4. M

    Flow through a pipe along a reduced diameter

    actually the flow rate will be constant if it is one stream... the velocity will increase in the 40...pressure will reduced... then velocity will come back to its normal... but with very long pipes the pressure will drop due to friction... so it is not a must that the velocity and...
  5. M

    Calculating Fan Power Using an Ohm Meter: Is it Possible?

    Power=I*U this will give you the power produced by the motor but it will not give the real power of the fan... which is power=Tw fan power will be a little less than motor power and this due fraction(energy conv.)
  6. M

    How can you calculate density from : altitude temperature and absolute humidity

    from humidity u can find due point due point and temp u can find pressure if the fluid is ideal u can find volume by PV=nRT if u know pressure and temp u can find spc. volume from spc.volume and volume u can find mass from mass and volume u can find density...
  7. M

    Does friction increase with rpm in an engine?

    I think the increasing in temp is due the shortage in time to release the heat...so you will not have the enough time to release the heat because of the high velocity! so heat will build up! so you feel that it is hotter... that is mean, no more losses in energy is happing actually! it...
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