Physics Properties Of Matter Level: High School
Gas, Charles’s Law
The temperature of an ideal gas increases from 2 degree C to 4 degree C while remaining at constant pressure. What happens to the volume of the gas ? Which of the following statements are true ?a) It increases slightly
b) It increases to twice its original volume
c) It decreases slightly
d) it decreases half its original value
e) it does not change at all
Physics Properties Of Matter Level: High School
Pressure Exerted by a Gas
A sealed cubical container 18.7 cm on a side contains five times Avogadro’s number of molecules at a temperature of 20.0 degree C . Find the total force (in Newton’s) exerted by the gas on one of the walls of the container .a) 6.51 x 10^4
b) 8.14 x 10^4
c) 1.03 x 10^5
d) 1.27 x 10^5
e) 1.59 x 10^5
Physics Heat & Thermodynamics Level: High School
Thermal Expansion
The pendulum in a grandfather clock is made of brass and keeps perfect time at 18.6 degrees C . How much time (in minutes) is gained or lost in a year if the clock is kept at 25.9 degree C ?(you may consider the clock to be a simple pendulum) (coefficient of linear expansion for brass is 1.9 x 10^-5)a) -19.5
b) -22.8
c) -26.7
d) -31.2
e) -36.5
Physics Properties Of Matter Level: High School
Pressure
On an airplane flight , you look out the window of the jet and wonder about the forces exerted on the window . Suppose the air outside the window moves with a speed of approximately 147 m/s shortly after takeoff , and that the air inside the plane is at atmospheric pressure . If the window has a 23.5 cm by 42.5 cm rectangular shape , Calculate the net force (in Newton’s) exerted on the window by air pressure .a) 7.13 x 10^2
b) 8.91 x 10^2
c) 1.11 x 10^3
d) 1.39 x 10^3
e) 1.74 x 10^3
Physics Properties Of Matter Level: High School
Pressure
At ground level , you get into an elevator with a glass of water that is ¾ filled . You push the button for the 4th floor and the elevator moves upward with constant acceleration . During this period of acceleration , how does the pressure on the bottom of the glass compare to the pressure when the elevator was at rest , Which of the following statements are true ? (Give ALL correct answers : B, AC, BCD…. Or None) .a) Pressure is the same
b) Pressure is less
c) Pressure is zero
d) It depends on the depth of the water in the glass
e) Pressure is greater
Physics Properties Of Matter Level: High School
Archimedes’s Principle
An object weighing 313 N in air is immersed in water after being tied to a string connected to a balance . The scale now reads 282 N . Immersed in a less dense unknown liquid ,the object weighs 296 N . Calculate the density of the unknown liquid (in kg/m^3)a) 336.3
b) 380.1
c) 429.5
d) 485.3
e) 548.4
Physics Properties Of Matter Level: High School
Archimedes’s Principle
Imagine that you have a solid cube made of Compound Y . You put the cube into a beaker filled with water . The cube floats to the top of the water and remains there , at rest , with the top quarter of the cube sticking out of the water . Which of the following statements are true ?a) The density of Compound Y must be equal to 750 kg/m^3
b) The buoyant force on the cube is equal to its own weight
c) The cube of Compound Y weighs the same as a cube of water of the same size
d) The substance must be more dense than water .
e) The cube displaces an amount of water less than its own volume .
Physics Properties Of Matter Level: High School
Hydrostatic Pressure
A very tall container (height = 125 cm)contains mercury up to a certain depth 78 cm , and the rest of the container is filled with alcohol . What is the absolute pressure (in atm) at the bottom of the container ? (Densities in kg/m^3 : mercury (13600) , water (1000) ,oil (920, alcohol(800)).a) 1.06
b) 1.32
c) 1.65
d) 20.7
e) 2.58
Physics Properties Of Matter Level: High School
Archimedes’s Principle
Imagine that you have a solid cube made of Material X, You put the cube into a beaker filled with water. The cube sinks to the bottom of the beaker and sits there , at rest , on the bottom . Which of the following statements are true ?a) The buoyant force on the cube is equal to its own weight .
b) The cube displaces an amount of water less than its own weight .
c) The cube of Material X weighs more than a cube of water the same size .
d) The normal force exerted by the bottom of the beaker on the cube is equal to the weight (in air) of the cube .
e) The substance must have the same density as water .
Physics Properties Of Matter Level: High School
Archimedes’s Principle
A piece of lead shaped like a hockey puck is floating in a mercury bath . The lead has a diameter of 9 cm and height of 2.9 cm . How deep below the surface of the mercury (in cm) is the bottom of the lead puck ? (Densities in kg/m^3 : mercury (13600), lead (11300) , silver (10500) , iron (7860))a) 2.41
b) 2.72
c) 3.08
d) 3.48
e) 3.93
Physics Waves And Oscillations Level: High School
Interference
Consider two sources of sound , each of which emits a sound wave of the SAME frequency and SAME intensity . The sources are located on a straight road , relative close to each other . You (the listener) are also located on the same road , about 200 meters away . All 3 objects (source A , source B and you) are in a straight line . Which of the following statements are true ?a) If you hear an intensity level of 10 dB from one source alone , then the two sources combined will give a level of 20 dB
b) If the two sources are separated by 3/2 wavelengths , there will be destructive interference at your position.
c) If you hear an intensity level of 10 dB from one source alone . then the two source combined will give a level of less than 20 dB .
d) For beats to occur , the sound waves from the two sources must have different amplitudes.
e) If the sources are separated by 4 wavelengths , there will be constructive interference at your position .
Physics Waves And Oscillations Level: High School
Interference
Two loudspeakers are located on one wall of a room and are separated by a distance of 8 m along the wall . The speakers are in phase with each other . A listener sits in a chair directly in front of the speakers ,at a distance of 11.2 m from that speaker . If the listener hears destructive interference at this point , what is the minimum frequency (in Hz) of the sound emanating from the two speakers ? Consider the speed of sound in air to be 343.0 m/s .a) 31.8
b) 46.1
c) 66.9
d) 97.0
e) 140.6
Physics Waves And Oscillations Level: High School
Simple Harmonic Motion
Consider an ideal pendulum consisting of a “bob” of mass m hanging from a light (massless) string of length L . The pendulum swings back and the forth in simple harmonic motion (SHM) . You may assume that the oscillations are small ,so that the motion is “ideal” SHM . Which of the statements below are true ?a) If the initial amplitude doubles , the frequency will increase by a factor of 1.4
b) If the pendulum is moved to Jupiter , the frequency will decrease
c) In order to deduce the value of g (accel ,due to gravity ) , you would need to measure the length and the period of the pendulum .
d) If the string length is changed to 4L , the frequency will increase by a factor of 2
e) If the mass of the pendulum bob is changed to 4m , the frequency will increase by a factor of 4 .
Physics Waves And Oscillations Level: High School
Intensity of Sound
You are a rock concert , standing 10.0 m from one of the loudspeakers . You measure the decibel level to be 109.9 dB at this location . You are worried that this intensity level may be harmful to your ears , so you want to move farther away from the loudspeaker to reduce the sound to a “dull roar” at a decibel level of 84.0 dB . What distance (in meters) would you have to be from the loudspeaker to reach this reduced decibel level ?a) 130
b) 152
c) 178
d) 208
e) 243
Physics Waves And Oscillations Level: High School
Standing Waves
We are going to examine standing waves on a string in the familiar context of a guitar . Which of the statements below are true ? (Give ALL correct answer: B,AC,BCD…., or None).a) If a guitar string is out of tune by being too low in frequency , then you should loosen that frequency .
b) To tune a guitar ,you change the actual length of the strings .
c) The middle of a string must always be an anti-node in this standing wave .
d) For a given string ,the shorter the vibrating part , the higher the frequency of the sound .
e) In general , the lighter (thin) strings make lower frequencies than the heavier (thick) strings .
