Physics Work,Power & Energy Level: High School
A small bubble is released from a depth of 6.00 m with a d = 0.35 mm, how large will the bubble be when it reaches the surface ? Temperature is constant .
Physics Modern Physics Level: High School
Which one of the following is demonstrated by the Compton Effect ?a) Time dilation
b) Length contraction
c) The uncertainty principle
d) Electrons have wave properties.
e) Electromagnetic radiation has particle properties
Physics Modern Physics Level: High School
Dual Nature
Which one of the following quantities is the same for all photons in vacuum ?a) Speed
b) Frequency
c) Kinetic energy
d) Wavelength
e) Total energy
Speed
It 3 x 10^8 m/s in vaccum for all photons .Physics Quantum Mechanics Level: High School
Four which one of the problems did Max Planck make contributions that eventually lead to the development of the “quantum’ hypothesis ?a) Photoelectric effect .
b) Uncertainty principle .
c) Black body radiation curves .
d) The motion of the earth in the ether .
e) The invariance of the speed of light through vacuum .
Physics Relativity Level: High School
Rocket A travels with a speed 0.800c relative to the earth . Rocket B passes rocket A with speed 0.500 c relative to rocket A . Determine the speed of rocket B relative to the earth . Assume that the earth is an inertial reference frame .a) 0.714 c
b) 0.929 c
c) 1.30 c
d) 1.40 c
e) 1.70 c
Physics Relativity Level: High School
The temperature of a 5.00 kg lead brick is increased by 225 degree Celsius . If the specific heat capacity of lead is 128 J/(kg *C degree) , what is the increase in the mass of the lead brick when it has reached if final temperature ?a) 4.33 x 10^-11 kg
b) 9.66 x 10^-11 kg
c) 1.60 x 10^-12 kg
d) 2.40 x 10^-12 kg
e) 4.80 x 10^-4 kg
Physics Relativity Level: High School
Total Energy
Determine the total energy of an electron traveling at 0.98 c .a) 0.25 MeV
b) 0.51 MeV
c) 0.76 MeV
d) 1.8 MeV
e) 2.6 MeV
Physics Relativity Level: High School
Length contraction
The Milky Way galaxy is a part of a group of galaxies called the Local Group . The proper distance from the Milky Way , on one side of the Local Group ,to the M31 galaxy on the other side is approximately 2.4 x 10^6 light years . How long (in years) would it take a spaceship traveling at 0.999 c to travel this distance according to travelers onboard ?a) 2.4 x 10^6 years .
b) 8.4 x 10^5 years .
c) 1.1 x 10^5 years .
d) 5.6 x 10^4 years .
e) 2.0 x 10^4 years .
Physics Relativity Level: High School
Length contraction
Which one of the following statements concerning the proper length of a meter stick is true ?a) The proper length is always one meter .
b) The proper length depends upon the speed of the observer .
c) The proper length deepens upon the acceleration of the observer .
d) The proper length depends upon the reference frame in which it is measured .
e) The proper length is the length measured by an observer who is moving with respect to the meter stick .
Physics Relativity Level: High School
Time Dilation
In the year 2100 , an astronaut wears an antique , but accurate , “quartz” wristwatch on a journey at a speed of 2.0 x 10^8 m/s . According to mission control in Houston , the trip lasts 12 hours . How long was the trip as measured on the watch ?a) 6.7 hr
b) 8.9 hr
c) a2.0 hr
d)16.2 hr
e) 21.6 hr
Physics Relativity Level: High School
Time Dilation
Which one of the following statements concerning time dilation is true ?a) It is predicted by special relativity , but has never been observed .
b) It has been observed only in experiments involving radioactive decay processes .
c) It has been observed in experiments involving both atomic clocks and radioactive decay processes .
d) It was demonstrated by the Michelson-Morley experiment .
e) It has been disapproved in experiment with atomic clocks .
Physics Relativity Level: High School
Relativity
Danielle is moving in a spaceship at a constant velocity away from a group of stars . Which one of the following statements indicates a method by which she can determine he absolute velocity through space ?a) She can measure her increase in mass .
b) She can measure the contraction of her ship .
c) She can measure the vibration frequency of a quartz crystal .
d) She can measure the change in total energy of her ship .
e) She can perform no measurement to determine this quantity .
Physics Force & Laws Of Motion Level: High School
Conservation of Momentum
At time t = 2.3 s , a 4 kg block that initially moves with a constant speed of 6 m/s undergoes an inelastic collision with another block . Any two inertial observations must agree that .a) The event took place at t = 2.3 s .
b) The initial speed of the block is 6 m/s .
c) The initial speed of the block has magnitude 24 kg*m/s .
d) The second block is moving after the collision .
e) The momentum of the two block system is conserved during the collision .
Physics Rotational Mechanics Level: High School
Rotational Kinetic Energy
Rigid rods of negligible mass lying along the y axis connect three particles (see figure at “click here) . If the system rotates about the x axis with an angular speed of 2.00 rad/s . finda) the moment of inertia about the x axis and the total rotational kinetic energy evaluated from ½ Iw^2 .
b) The tangential speed of each particle and the total kinetic energy evaluated from sigma ½ mivi^2 .
Physics Rotational Mechanics Level: High School
A common demonstration illustrated in the figure at “click here” consists of a ball resting at one end of a uniform board of length l , hinged at the other end , and elevated at an angle theta . A light cup is attached to the board at ‘re’ so that it will catch the ball when the support stick is suddenly removed .a) show that the ball will lag behind the falling board when theta is less than 35.3 degree .
b) If the board is 1.00 m long and is supported at this limiting angle , show that the cup must be 18.4 cm from the moving end .
