Physics Properties Of Matter Level: High School
Pressure
What is the height in cm of the column of mercury barometer when the atmospheric pressure at a certain location is 1 atm ? The density of mercury is 13.55 g/cm3 .73.7 cm
76.1 cm
77.6 cm
75.3 cm
Physics Properties Of Matter Level: High School
Fluids
Which phase (state) of matter has a fixed volume and takes the shape of its container ?Plasma
Gas
Liquid
Solid
Physics Properties Of Matter Level: High School
Pascal’s Law
What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighing 12,000 N that is supported by the piston in a large cylinder that has a diameter of 1.4 m ? Assume that there is an enclosed chamber in common between the two pistons and that the chamber is filled with hydraulic oil .2740 N
4800 N
2740 N
627 N
Physics Properties Of Matter Level: High School
Archimedes’s Principle
A spherical shaped hollow steel shell , with a radius of 2.5 m , containing some instruments , is lowered by a cable into a lake . The shell with its contents weighs 7.2 x 105 N on the deck of the ship from which it is being lowered . What is the tension in the cable when the sphere is completely immersed in the water ?7.9 x 104 N
2.9 x 104 N
7.2 x 102 N
1.8 kg
Physics Properties Of Matter Level: High School
Bernoulli’s Theorem
During level airplane flight at a constant velocity , the pressure created by air flowing over the curved upper surface of the wing compared to the pressure created by air flowing along the flat underside of the wing is ?Insufficient data
The same
More less
Physics Properties Of Matter Level: High School
Archimedes’s Principle A fisherman and his young niece are in a boat on a small pond . Both are wearing life jackets . The niece is holding a large floating helium filled balloon by a string . Consider each action below independently , and indicate which actions leave the level of the water in the pond unchanged .
a) The niece gets in the water , loses her grip on the string , letting the balloon escape upwards .
b) The fisherman lowers himself in the water and floats
c) The niece pops the balloon
d) The fisherman drinks water from the pond
e) The fisherman knocks the tackle box overboard and its sinks to the bottom .
Physics Properties Of Matter Level: High School
Gases
A child’s helium-filled balloon escapes at a sea level and 20.0 degree C . When it reaches an altitude of 2900 m where the temperature is 4.50 degree C and the pressure only 0.720 atm , what is the ratio of the new volume to the original volume at sea level ?a) 7.02
b) 8.21 x 10^-1
c) 9.61 x 10^-1
d) 1.12
e) 1.32
Physics Properties Of Matter Level: High School
Bernoulli’s Theorem
Water flows steadily from an open tank into a pipe . The elevation of the top of the tank is 12.5 m , and the elevation at the pipe is 3.30 m . The initial cross sectional area of the pipe (at point 2) is 6.90 x 10^-2 m^2 , and at where the water is discharged from the pipe (at point 3), it is 3.00 x 10^-3 m^2 . The cross sectional area of the tank is very large compared with the cross-sectional area of the pipe .a) Assuming that Bernoulli’s equation applies , compute the volume of water delta V that flows across the exit of the pipe in the time interval 4.90 s .
Physics Properties Of Matter Level: High School
Gas
The pressure of a gas held at constant temperature is inversely proportional to the volume. Express the pressure P1 of a gas with the volume of 10 liters in terms of the pressure P2 when the volume is only 1 liter ?
Physics Properties Of Matter Level: High School
Fluids-Torricelli’s Theorem The water level in a 15.0 cm diameter cylinder is maintained at a constant height of 0.45 m . If the diameter of the spout pipe is 0.50 cm , how high is the vertical stream of water ? (Assume that water is an ideal fluid.)
Physics Properties Of Matter Level: High School
Bernoulli’s Equation
A horizontal pipe carries water at one point the pipe widens to four times its previous cross sectional area if the speed of the flow in the narrow part of the pipe is 4 m/s find the change in pressure from the narrow to the wider part of the pipe .a) decrease in pressure by 7500 Pa .
b) increase in pressure by 7500 Pa .
c) decrease in pressure by 3000 Pa .
d) increase in pressure by 3000 Pa .
Physics Properties Of Matter Level: High School
Fluids
When the two arms of a U-tube manometer containing mercury are connected to two chambers the difference in the heights of the mercury in the two arms is 4.5 cm what is the difference in pressure between the chambers ? (density of mercury 13600 kg/m^3 and g = 9.8 m/s^2 )a) 1.0 x 10^4 Pa
b) 6.0 x 10^5 Pa
c) 6.0 x 10^4 Pa
d) 1.0 x 10^5 Pa
Physics Properties Of Matter Level: High School
Solids
A cylindrical specimen of steel of cross section area 5 cm^2 is subjected to a tensile force of 800 N the stress in the material is ?a) 1.6 x 106 N/m^2
b) 3.2 x 106 N/m^2
c) 4.0 x 103 M/m^2
d) 8.0 x 103 N/m^2
Physics Properties Of Matter Level: High School
Young’s Modulus
A cable stretched by an amount d when it supports a crate of mass M . The cable is replaced by another cable of same material having the same length but twice the diameter. What is the mass of the load that can be supported by the thicker cable if it stretches by an amount d ?
Physics Properties Of Matter Level: High School
Archimedes Principle
A mountain climber friend with a mass of 80 kg ponders the idea of attaching a helium-filled balloon to himself to effectively reduce his weight by 25% when he climbs . He wonders what the approximate size of such a balloon would be . hearing of your physics skills , he asks you . What answer can you provide , showing your calculations ?