1. hydraulic shears are used in manufacturing are used to cut large sheets of metal. using hydraulic pressure, the machine pushes a wedge to cut the metal. the wedge has a 0.25 inch thick cutting blade and the length of the blade is 5 inches. hydraulic pressure applies an effort of 2000 ib to the wedge. what's the ideal mechanical advantage to the wedge?

2. how much resistance force can ideally be generated by the 2000 ib efforct force?

3. a wheelchair ramp has a height of 4 feet. the base of the ramp measures 11 feet. what is the slope of the ramp?

4. what is the idea mechanial advantage is the ramp?

5. if a person and a wheelchair have a combined weight of 150 ib, how much effort force is required to travel up the ramp?

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet