Physics Relativity Level: High School
Mass Energy Equivalent
Suppose one gallon of gasoline produces 1.1 108 J of energy , and this energy is sufficient to operate a particular car for 38 miles .An aspirin tablet has a mass of 320 mg . If the aspirin could be converted completely into thermal energy , how many miles would this car go on a single tablet ? Answer in units of miles .
Physics Relativity Level: High School
Mass Energy Equivalent
An electron and a positron each have a mass of 9.11 10-31 kg . They collide and both vanish , with only electromagnetic radiation appearing after the collision . If each particle is moving at a speed of 0.35 c relative to the laboratory before the collision . determine the energy of the electromagnetic radiation .
Physics Relativity Level: High School
A .110 nm photon collides with a stationary electron . After the collision the electronic moves forward and the photon recoils backwards . Find the momentum and kinetic energy of the electron . (The KE should be expressed in eV) .
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 Relativity Level: High School
Time dilation
The star is 50 light years distant from earth . If we traveled on a spacecraft whose speed is 1/10 the speed of light , how long would a round trip to the star and back take ?
Physics Relativity Level: High School
Time dilation
There are a pair of identical twin astronauts. One remains on the earth while the other goes on an extended trip through the galaxy. During this trip, she avgs, a speed of .95 times the speed of light. Suppose this trip lasts for a period of 1 year, as measured by the traveling astronaut . What is the age difference between the twins when the traveler returns to earth ?
Physics Relativity Level: High School
The fundamental interaction responsible for the stability of a nucleus is thea) Gravitational interaction
b) Newton’s laws
c) Strong gor nucleus interaction
d) Weak interaction
Coulomb force
Physics Relativity Level: High School
According to Einstein’s special theory of relativity , when compared to an identical clock at rest, a clock moving with constant velocity will runa) slow
b) fast
c) at the same rate
d) alternately fast and