• Q : Angular velocity and acceleration in trains and wheels....
    Mechanical Engineering :

    An engine flywheel initially rotating at 24 rev/min is accelerated uniformly for 3.8 seconds whilst rotating through 41 revolutions.

  • Q : Rigid bodies and newtons second law of motion....
    Mechanical Engineering :

    The mass is initially a distance of 2.16m above the floor level when it is released causing the mass to hit the floor 6.2s later.

  • Q : Maximum shearing stress on beam....
    Mechanical Engineering :

    Two full-size 2x6 inch planks are connected as shown by lag screws to form a beam which is subject to a vertical shear of 400 lb.

  • Q : Turbine thermal efficiency....
    Mechanical Engineering :

    Steam @ 10 MPa, 600 degrees celcius enters the first-stage turbine of an ideal Rankine cycle with reheat.

  • Q : Determining final velocity....
    Mechanical Engineering :

    An object whose mass is 1 lb has a velocity of 100 ft/s. How to determine the final velocity, in ft/s, if the kinetic energy of the object decreases.

  • Q : Findingtemperature of refrigerant....
    Mechanical Engineering :

    A closed vessel with a volume of 2 ft^3 contains 5 lb of Refrigerant 134a. A pressure sensor in the tank wall reads 71.39 lbf/in.^2 (gage).

  • Q : Determining mass of ammonia....
    Mechanical Engineering :

    Ammonia is stored in a tank with a volume of 0.21 m^3. How do I determine the mass, in kg, assuming saturated liquid at 20 deg C.

  • Q : Determining feasibility....
    Mechanical Engineering :

    If the cycle operates between reservoirs at 2400 and 1000 deg R, is the claim feasible?

  • Q : Problem on ideal rankine cycle....
    Mechanical Engineering :

    The enthalpy of the steam entering the turbine is 2509.1 kJ/kg and of the steam entering the pump is 151.53 kJ/kg.

  • Q : Heat pump for household....
    Mechanical Engineering :

    Ever wonder if you can build a machine to heat up your house using the heat from the outside environment? Well you'll need to start with the heat pump concept.

  • Q : Hazen-williams formula....
    Mechanical Engineering :

    The length of cast-iron pipe is to be 4200 ft., and the head causing flow is to be 12.6ft. After the pipe has been in service 5 years.

  • Q : Multi degree of freedom....
    Mechanical Engineering :

    There is no friction between m and m1. How would you determine the coordinates to describe the system and the equations of motion?

  • Q : Workout velocity and range of shell fired....
    Mechanical Engineering :

    Why is it possible to consider the vertical and horizontal motion of a projectile independently of each other.

  • Q : Compressive stress analysis....
    Mechanical Engineering :

    A circular cross sectional bar with a diameter of 3.25 inches is loaded with a uniform axial compressive load of 22,750 pounds.

  • Q : Motor coming to rest....
    Mechanical Engineering :

    A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.

  • Q : Working speed in rpm....
    Mechanical Engineering :

    A transmission shaft is fitted with a coupling that is secured by eight 20 mm diameter bolts pitched on a circle with a diameter of 225 mm.

  • Q : Newton laws and conveyer belt....
    Mechanical Engineering :

    A package is at rest on a conveyer belt which is initially at rest. The belt is started and moves to the right for 1.5s with a constant acceleration.

  • Q : Carbon content of steel....
    Mechanical Engineering :

    A steel contains 55% alpha-ferrite and 45% gamma-ferrite or austenite at 750 degrees Celsius. What is the carbon content of steel?

  • Q : Determining linear acceleration of crate....
    Mechanical Engineering :

    A brake on the drum is accidentally partially released and the crate accelerates uniformly, reaching the ground after 2.20 seconds.

  • Q : Aircraft acceleration and time....
    Mechanical Engineering :

    An aircraft accelerates uniformly from rest down a runway. After a distance of 800m, the aircraft reaches its take-off speed of 288 km/h.

  • Q : Linear equations and outputs....
    Mechanical Engineering :

    An object is thrown horizontally from the top of a building from an elevation of 64 feet above ground level.

  • Q : Stress due to axial force....
    Mechanical Engineering :

    A circular cross section solid steel shaft 3” in diameter and 4 feet long is fixed at one end and free at the other.

  • Q : Deriving equation of motion....
    Mechanical Engineering :

    Determine the equation of motion of the system in terms of the generalized co-ordinates shown in the drawing and described above.

  • Q : Deceleration caused by braking action....
    Mechanical Engineering :

    A brake is applied to a car traveling at a constant speed of 25 m/s. If the deceleration caused by the braking action is 5 m/per second squared.

  • Q : Theoretical compressor power input....
    Mechanical Engineering :

    A gas turbine takes in air at 300 K and discharges it to the combustion chamber at 620 K. See attached file for full problem description with diagram.

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