Physics Properties Of Matter Level: High School
Archimedes Principle
A 6-kg piece of metal displaces 1 liter of water when submerged . what is its density ?
Physics Properties Of Matter Level: High School
What is the liner density of a string if its length is 5cm and it had a mass of 20 g ?
Physics Properties Of Matter Level: High School
Pressure Law in Gases
A sample of gas is confined at constant volume in a can which can withstand a pressure of 5000 N/m2 . If the gas is initially at a pressure of 2000 N/m2 , and the sun warms the container from 20 degrees C to 80 degrees C , will the container leak ?
Physics Properties Of Matter Level: High School
Elasticity
At 20 degrees C , a steel rod of length 40000 cm and a brass rod of length 30000 cm, both of the diameter, are placed end to end between two rigid supports 70000 cm apart , with no initial stress in the rods . The temperature of the rods is now raised to 60 degrees C .a) What is the stress (the same in both rods) at 60 degrees C ?
b) How far from its old position is the new junction between the rods ?
Physics Properties Of Matter Level: High School
Gases
Suppose that the molecules of a gas actually have five degrees of freedom rather than three . Determine the average molecular kinetic energy of such a gas at 300 degrees C .
Physics Properties Of Matter Level: High School
Gases
What temperature would nitrogen gas molecules possess an rms speed of 25.0 m/s ?
Physics Properties Of Matter Level: High School
Elasticity
A 365 lb crate 1.26 ft high with a squared base 1.00 ft on each side is subjected to a shear force of 25.5 lb . Find the sher stress on the crate .
Physics Properties Of Matter Level: High School
Elasticity
When a 300 N man sits on a chair, each of the four chair legs experiences strain of 5.72*10^-4 , while each leg is compressed by .0552 cm . Assume that the four legs are identical and that they share the load equally , find the initial length of each leg
Physics Properties Of Matter Level: High School
Gases
The inside of the cylindrical can shown at “click here” above has cross sectional area 0.005 m^2 and length 0.15 m . The can is filled with an ideal gas and covered with a loose cap . The gas is heated to 363 K and some is allowed to escape from the can so that the remaining gas reaches atmospheric pressure (1.0 x 10^5 Pa ) . The cap is now lightened and the gas is cooled to 298 K .a) What is the pressure of the cooled gas ?
b) Determine the upward force exerted on the cap by the cooled gas inside the can ?
c) If the cap develops a leak , how many moles of air would enter the can as it reaches a final equilibrium at 298 K and atmospheric pressure ?(Assume that air is an ideal pressure)
Physics Properties Of Matter Level: High School
Use the concept of acceleration , force and yield strength to explain why delicate goods shipped in cardboard box are often fires packed in polystyrene polyurethane foam ?
Physics Properties Of Matter Level: High School
Elasticity A material has a breaking stress of 700 MNm-2 . What mass could be hung from a cable of this material if the diameter of the cable was 4 mm ?
Physics Properties Of Matter Level: High School
Archimedes Principle
A 600 kg weather balloon is designed to lift a 4000 kg package . What volume should the balloon have to after being inflated with helium at standard temperature and pressure (1.013 x 10^5 Pa)
Physics Properties Of Matter Level: High School
Archimedes Principle
A bathysphere has a radius of 1.5 m and a mass of 1.2 x 10^4 kg . In order to dive , the sphere takes on mass in the form of sea water . Determine the mass of the sea water the sphere takes on so it can descend at a constant speed of 1.2 m/s when the resistive force on it is 1100 N upward . The density of sea water is 1.03 x 10^3 kg/m^3 .
Physics Properties Of Matter Level: High School
Archimedes Principle
An empty super balloon has a mass of 0.012 kg . The balloon is filled with He at S = 0.181 kg/m^3 . At this S , the balloon has a radius of 0.5 m . If the balloon is fastened to a vertical line , What is the tension in the line ?
Physics Properties Of Matter Level: High School
Archimedes Principle
A small ferry boat is 4 m wide and 6 m long . When a loaded truck pulls onto it , the boat sinks an additional .04 m into the river . What is the weight of the truck ?