The platform P, shown in Fig. has negligible mass and is tied down so that the 0.4 m long cords keep a 1m long spring compressed 0.6 m when nothing is on the platform. If a 2-kg block is placed on the platform and released from rest after the platform is pushed down 0.1 m, determine the maximum height h the block rises in the air, measured from the ground.

The standard atmosphere in meters of gasoline (Y = 6660 N/m3) is nearest take Patm= 101300 N/m2 * O 24.9 m O 15.2 m O 18.3 m O 21.2 m A cubic meter of a liquid has a weight of 9800 N at a location where g = 9.79 m/s2. What is its weight at a location where g 9.83 m/s2? * O 9780 N O 9840 N O 9820 N O 9800 N The pressure at a point where the gage pressure is 70 cm of water is nearest take Patm =100 KPa. * O 169 kPa O 69 kPa O 107 kPa O 30 kPa Calculate the weight of a body that occupies 200 m3 if its specific volume is 10 m3/kg. * O 132 N O 196 N O 20 N O 921 N 10-kg body falls from rest, with negligible interaction with its Surroundings (no friction). Determine its velocity after it falls 5 m. * O 9.9 m/s 19.8 m/s O 12.8 m/s O 15.2 m/s D

a) A wind turbine generates power by transferring the kinetic energy of the wind to rotational energy used to spin a generator, generating electrical power. Wind travelling at 7 m/s contacts the turbine blades and is slowed to 1.75 m/s. The wind turbine has a blade diameter of 41 m, and the air has a density of 1007 kg/m³. What is the power generated in MW if the efficiency is 58%? Round your answer to 3 significant figures. b) What is the torque acting on the shaft if the blades are rotating at 9.3 rpm? Give your answer in kNm. Round your answer to 4 significant figures.

1

An 8 kg and a 2 kg block are attached to a pulley system as shown in the picture and a force is being applied to the left. If the 2 kg block is accelerating upward at 1.2 m/s2 , what is the force used to pull the blocks? There is no friction between the 8 kg block and the surface its moving across and you can assume the rope is massless and the pulley is massless and frictionless.  a) 78.4 N b) 19.6 N c) 31.6 N d) 98.0 N

Q 5 please

please solve the termodynamics question.

A 5 cubic meter tank contains chlorine at 300 kPa and 300K after 3 kg of chlorine has been used. If the original temperature was 315K.   Determine:   a) the original mass in kg   CHOICES   55.66   50.66   45.66   b) the original pressure in kPa gage   CHOICES   337.1   235.775   327.1