Retracting cylinder - FOR OTA 103642

A 2" diameter hydraulic ram piston supports an elevator in a 2 story building. When the elevator car is at the first floor, the piston is fully retracted into the cylinder. The piston extends 15 feet to place the empty car at the second floor. Eight passengers who each weigh exactly 150 lb. enter the car. If the bulk modulus ...continues

Air compression

Air is used at a rate of 30 cfm from a receiver at 102 degress Farenheit and 155 psi. If the atmospheric conditions are 14.7 psia and 75 degrees farenheit, how many cfm of free air must the compressor provide? NOTE: Moved to Physics by BrainMass Admin.

Cylinder design

Design a cylinder to compress 68 degree farenheit air from atmospheric pressure to 200 psig without increasing the temperature more than 25 degrees farenheit. Show cylinder dimensions and discuss how far the piston must travel. *An autocad file would be preferable when designing and labeling the cylinder.

Kinetic Energy and Work

1. A luge and its rider, with a total mass of 85 kg emerges from a downhill track onto a horizontal straight track with an initial speed of 37 m/s. If they stop at a constant deceleration of 2.0 m/s^2, (a) What magnitude F is required for the deceleration force, (b) what distance "d" do they travel while decelerating (c) what wo ...continues

Net force 2

The sensor in the torso of a crash-test dummy records the magnitude of the net external force acting on it. If the dummy is thrown forward with a force of 130.0 N while simultaneously being hit from the side with a force of 4500.0 N, what force will the sensor report? I would like the formula used to solve this problem a ...continues

physical science lab questions

A volume of gas is decreased by half while the temperature remains constant. How much does the gas pressure change? (2) State the relationship between the volume and pressure of a gas when the temperature is held constant (boyles law). (3)does data taken in an experiment support the idea that the pressure times the volume ...continues

Raising a yacht by attaching filled air bags to it

a largy yacht has a mass of 305 tonnes. the yacht sinks and is ofund lying on the sea bed at a depth of 40m. It is estimated that the volume of teh yacht is such that it displaces 0.8m3 of water when it is totally submerged under water. a salvage team decide to aise the yacht tot eh surface by fixing large bags to the yacht ...continues

calculating tension in a steel wire under water

a spherical buoy is tied to the sea bed by a steel wire so that exactly half the buoy is above the water surface. if the diameter of the buoy is 1.3m and the mass of the buoy is 20kg a) determine the tension in the wire b) if this tension produces an extension in the steel wire of 4.0mm, calculate the length of the wire. ...continues

Tension of a spring with two masses on it.

There are two masses hanging down off the sides of a table connected with a spring between them. Describe what will happen and what value the spring scale S will read (a spring scale will read the tension in the wire.) in fig.1 below if m 1 = m 2 = 1 kg and if m 1 = 1.2 kg, m 2 = 1 kg. For the second case show your work and ...continues

Coplanar Forces acting on an object at different magnitudes and directions.

Three coplanar forces act on a 75000.0 kg object in outer space, where there is no gravity: 14.2 kN directed at 357°, 25.6 kN at 138°, and 16.4 kN at 255°. What is the magnitude and direction of the acceleration? If the object has an initial velocity of 17.5 miles/h directed at 58.6° in the same plane as all three forces, ...continues