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 for an ideal gas is constant when the temperature remains at the same temperature?

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 and filling the bgs with air. The total mass of the empty bags is 100kg. determine A) the volume that the air filled bags will need to be so that teh yacht and bags system is exctley balanced, (it doesn't rise to the surface, but doesn't sink back to the sea bed) b) the number of moles of air needed to fill the bags to teh required volume. data: temperat... click for more

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. data: density of sea water is 1030kg/m^3 youngs modulus for stell is E = 2.0x10^11 N/m^2 Diameter of the steel wire = 8.0mm (assume the wire remains in its elastic deformation region. also assume that the mass of the wire is negligible.)

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 obtain an acceleration numerically, if you think there will be one, along with the spring scale reading. (Ignore the mass of the scale, the pulleys, and the string.)

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, what will its velocity and position be after the force has been applied for 65.5 s? What will the objects direction from the origin be and in what direction will it be moving assuming the force was applied at the origin of coordinates? All directions are with respect to the x direction. Please show all work.