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The angle F1 makes with the positive c axis is 30degrees. Given that the resultant force F1+F2 lies in the direction of the X axis, find the magnitude of the resultant force.
A 60 g bullet moving with a speed of 500 m/s strikes a 5 kg block moving in the same direction with a speed of 30 m/s. If the bullet becomes embedded in the block, what is the final velocity and di
A 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation F=1.5t where t is time in units of seconds. What is the speed of the crate after 10 s?
The temperature of the steam entering the turbine is 700 F. Calculate the thermal efficiency of the cycle assuming isentropic expansion in the turbine.
A 20 kg object is pulled across a flat surface with a force of 100 N. The force is applied at a 30° angle to the floor. After 5 s the speed is 8 m/s. What is the speed 5 s later if coefficient
Determine the ratio of gross thrusts (contribution to engine thrust made by the exhaust nozzle only) for: a. The nozzle is converging-diverging with the area ratio for correct expansion to ambient p
However, test conditions limit the available power to 400 kW and 1 m3/s flow of water. Assume model and prototype efficiencies are the same. Find the head and speed of the model.
What is the correct speed at which the compressor must run? If inlet pressure of 90 kPa is obtained at a point where the normal ambient condition mass flow would be 60 kg/s, calculate the mass flow
At what RPM should the model be run? What is the required impeller diameter ratio between the model and prototype and what is the volume flow rate through the model if the efficiency is 0.88?
The water exits the chamber as a saturated liquid at the feedwater pressure. Determine the ratio of the mass flow rates of the incoming liquid water and superheated vapor that flow into this chamber
The speed of the 3500-lb sports car is plotted over 30 s time period. Plot the variation of the traction force F needed to cause the motion. at 10 seconds 60 m/s and at 30s 80 m/s.
An electric wire made of C14500 copper is stretched between two street supports at 20°C so that a stress of 40 MPa is produced.
Calculate the velocity v2 imparted to barge 2 just after the car has come to rest on the barge. Neglect the resistance of the water to motion at the low velocities involved.
A solid shaft of 30mm diameter is to be used, determine the maximum torque that can be applied without exceeding an allowable stress of 100x10kPa
Air is used in a carnot cycle as a working substance. Determine the efficiency of the cycle if as a result of an adiabatic expansion: a) the volume of the gas doubles. b) the pressure of the gas hal
Determine the maximum centric force which can be applied is the allowable normal stress is 160 MPa in the steel and 18 MPa in the concrete where length = 1.5m and Diameter = 450mm.
Air enters a set of these nozzles at 200 psia and 695 degrees F with a velocity of 46 ft/s and exits at 145 psia and 650 F. calculate the velocity at the exit of the nozzles.
Calculate the work in kJ/kg done per unit mass of the steam flowing through the turbine. If the steady state power output of turbine is 5 MW, calculate the mass flow rate in kg/s of the steam.
Determine for the cycle (a.) the rate of heat transfer to the working fluid passing through the steam generator, in kW. (b.) the thermal efficiency. (c.) the mass flow rate of condenser cooling wate
If it suddenly exposed to a convection environment at 50 C with h = 1200 W/m2 K, how long does it take for the center temperature to cool to 80 C? Also calculate the heat loss per unit length.
Determine the maximum power that can be transmitted through a stepped shaft rotating at 60 Hz. Knowing the radius of the fillet is r = 8mm and the allowable shearing stress is 50x10 3rd power kPa.
What is the rate at which radiation is emitted by surface in W? what is the net rate at which radiation is exchanged between the surface and cammer walls in W?
What is the required impeller diameter ratio between the model and prototype and what is the volume flow rate through the model if the efficiency is 0.88?
The plant manager decided to build a model. However, test conditions limit the available power to 400 kW and 1 m3/s flow of water. Assume model and prototype efficiencies are the same. Find the head a