Physics Properties Of Matter Level: High School
In the Netherlands , a dike holds back the sea from a town below sea level . The dike springs a leak 3.0 m below the water surface . If the area of the hole in the dike 1.0 cm squared , what force must the Dutch boy exert in order to save the town ?
Physics Properties Of Matter Level: High School
At the surface of a freshwater lake the air pressure is 1.0 atm . At what depth under water in the lake is the pressure 4.0 atm .
Physics Properties Of Matter Level: High School
What is the average pressure on the soles of feet of a 90 kg person due to the contact force with the floor ? Each foot has a surface area of 0.020 meters squared .
Physics Properties Of Matter Level: High School
Pascal’s Law
In a hydraulic lift , the diameters of the pistons are 5 cm and 20 cm . A car weighing W = 10.0 Kn is to be lifted by the force of the large piston .a) What is the force F(a) that must be applied to the small piston ?
b) When the small piston is pushed in by 10.0 cm , how far is the car lifted ?
c) Find the mechanical advantage of the lift for which the ratio is W/F (a) .
Physics Properties Of Matter Level: High School
Newly refined gasoline (p = 0,70 * 10 to the third Kg/m cubic ) is being pumped from the refinery into storage tank 15 m above the pump . At the pump , a pressure gauge reads 2.7 * 10 to the fifth Pa and a rate meter reads 2.5 m/s .a) Is a pressure gauge at eh storage tank reads 1.4 * 10 to the fifth Pa , use Bernoulli’s Law to find the gasoline speed as it enters the tank .
b) Use equation of sontinuity to determine the ratio of the pipe system’s cross-sectional are at the pump to that at the tank .
c) Do we have enough information to find the mass flow rate ? If not , explain why if so, calculate it .
Physics Properties Of Matter Level: High School
Gases
Assuming water molecules in the gas phase act as an ideal gas . how many times greater is the rms speed of water molecules in the gas phase at the boiling temperature of water compared to the freezing temperature of water
Physics Properties Of Matter Level: High School
Gases
If a certain amount of gas fills a 1.0 liter container and exerts a pressure on the walls of 2.0 N/m^2 at 2.0 N/m^2 at 20 degree Celsius . What would the pressure theoretically be at absolute zero . Assume it is an ideal gas and the container size remains constant .
Physics Properties Of Matter Level: High School
Archimedes Principle
An object ,weighing 720 N in air , has an apparent weight of 34.3 N when completely immersed in a tank of water (density of water is 10^3 kg/m^3). Keep three significant figures , find :a. The object’s volume V .
b. The object’s density .
Physics Properties Of Matter Level: High School
Liquids
A small Dutch boy, Hansel and his little sister Gretel were walking home from school along a polder when they saw a stream of water squirting horizontally from a hole in the dyke . Hansel used a meter stick and found that the hole was a distance Y1 = 116.3 cm above the polder and that the water landed a distance X1 = 1.52 meters from the base of the dyke. Hansel sent Gretel running from help and stuck his finger. (cross sectional area A1 = 1.00 cm^2) into the hole . While Hansel waved for help , he used the physics he learned in Kindergarten to calculatea) Time, T, the water is in the air .
b) The distance of the hole , Y2, below the surface of the North sea .
c) The velocity , V0, x, of the water as it exits the hole .
d) The velocity ,V, of the water as it hits the polder .
e) The cross sectional area , A, of the stream of water as it hits the Polder .
Physics Properties Of Matter Level: High School
A hunting knife weighing 2-Newtons and occupying a volume of 2.5 x 10^-4 m^3 is accidentally dropped in a lake . Which statement is true ?a. The buoyant for is 0.45 Newton .
b. The knife will sink to the bottom and stay there .
c. Both a and b are true .
d. The knife will float .
e. Insufficient data .
Physics Properties Of Matter Level: High School
Archemedes Principle
A block of unknown density is hung from a spring scale. The scale reads 2 Newtons. Then a beaker of water is brought up under the block. The block floats on the water. Which of the following is true statements ?a. The density of the block is greater than the density of water.
b. The scale will read slightly less than 2 Newtons but more than 1 Newton.
c. The buoyant force of the water is 2 Newtons.
d. The scale will read zero Newtons.
e. Both c and d are true.
f. Both a and c are true.
g. None of the above.
Physics Properties Of Matter Level: High School
A man is swimming 2-meters below the surface of a pool . The pool is 6 meters deep. What is the pressure the man experiences ? Assume the pool is at sea level.a. 1.96 x 10^4 N/m^2
b. 1.40 x 10^5 N/m^2
c. 1.39 x 10^4 N/m^2
d. 1.21 x 10^5 N/m^2
Physics Properties Of Matter Level: High School
Gases
The root mean square speed of O2 molecule at 25 degree Celsius is 480 m/sec(a) Predict the rms speed of CO2 molecules at 25 degrees Celsius
(b) To what temperature must the CO2 sample be changed to double its rms speed .
Physics Properties Of Matter Level: High School
A U-tube of uniform cross-sectional area and open to the atmosphere is partially filled with mercury . Water is then poured into both arms . If the equilibrium configuration of the tube is as shown in the figure at “click here” With h2 = 1.00 cm , determine the values of h1 .
Physics Properties Of Matter Level: High School
A large tank is partly full of pure water , and gauge pressure of 3.0 at m is maintained in the upper part of the tank by compressed air . A small hole is drilled in the tank 8.0 m below the free surface of the water . Calculate the velocity of the water emerging from the hole . (Note : The pressure given above the water is a gauge pressure , not an absolute pressure . The pressure outside the tank is , of course , different from the pressure inside the tank .)