modern phyics
Harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different
all of these
U-235 and Pu-239 are both
all of these
If a 1-microgram antimatter meteor were to strike the Earth, the amount of energy of forms other than mass that would be produced would be
180 billion joules.
A uranium atom is 238 times as massive as a hydrogen atom. The diameter of a uranium atom the diameter of a hydrogen atom times about
3.
Refer to the figure above. Suppose that an electron makes a transition from n 3 to n 2 and emits a photon of frequency 4 x 1014 Hz. Then an electron that makes a transition from n 3 to n 1 may emit a photon with a frequency of
4)9 x 1014 Hz.
This is consistent with the fact that the most energetic photon results from a transition from n 3 to
5) n-1
Which of the following isotopes is radioactive?
Carbon-14
Suppose two spaceships approach each other at the speed of light, and each sends a beam of light to warn the other of its approach. From the frame of reference of either spaceship, the light will reach the other ship
before they collide.
Present-day research in nuclear fusion uses
both of these
quantum level to the second, of the single photon that would be emitted if the Two photons are emitted as an electron de-excites from the third and then to the ground state. The sum of the frequencies of the two photons equals the frequency de-excitation were from the third to the ground state directly. This is according to
both of these
A nuclcon is either
a proton or a ncutron
According to the correspondence principle, a new theory is valid if it
all of these
An atom with an imbalance of electrons to protons is
an ion
A beam of electrons has
both of these
Deuterium and tritium are both
both of these
In the Bohr model of hydrogen, discrete radii and energy states result when an electron circles the atom in an integral number of
de Broglie wavelengths.
The operation of a cloud chamber relies on
condensation.
The origin of cosmic rays is the
cosmos
The ether theory of light propagation is
discredited
When an element undergoes nuclear tragsmutation, the result is a completely different
element.
A spaceship that is traveling very fast with respect to your frame of reference, fires a photon beam that travels at speed c with resct to the spaceship. You measure the photon beam' speed to be
equal to c.
When you approach a blinking light source which in turn is moving towards you, you perceive an increase in
frequency of the light, but not speed.
When a nucleus emits a beta particle, its atomic number
increases by 1
The energy release in both fission and fusion is mainly in the form of
kinetic energy of fragments.
The fate of the world's uranium supply is to eventually become
lead.
In nuclear fission and nuclear fusion reactions, the amount of mass converted to energy of other forms is
less than 1 % .
An excited hydrogen is capable of emitting radiation of
many more than 3 frequencies.
According to the well-known equation, energy equals mass times the speed of light squared
mass and energy are related.
According to the special theory of relativity, events that are simultaneous in one frame of reference
may or may not be simultaneous in other frames of reference.
remains? The half life on an isotope is one day. At the end of three days, how much of the isotope
one-cighth
Electric forces within an atomic nucleus tend to
push it apart.
The high temperature of the Earth's interior is due mostly to
radioactivity
You and a friend share the same spacetime when there is no
relative velocity between you.
If the sun collapsed to a black hole, the time required for Earth to orbit the collapsed sun would
stay the same.
present time is Pure elements can be transformed into entirely different elements. This statement at the
true.
a breeder reactor
uranium is converted into plutonium.
Quantization of electron energy states in an atom is better understood in terms of the electron's
wave nature.
When Rutherford had a stream of alpha particles hit a gold foil, most of the particles
went almost straight through.
A nuclear process that has relatively few radioactive by-products is
fusion.
Which radiation has no electric charge associated with it?
gamma rays.
X-rays are similar to
gamma rays.
When an object is pushed to relativistic speeds, its momentum is
greater than mv
According to the principle of equivalence, observations made in a Newtonian gravitational field are indistinguishable from observations made in
none of these
The Schrödinger equation is restricted to
none of these
In bubble chambers, charged particles move in spirals because
of energy dissipation.
A nucleon has more mass when it is
outside the nucleus.
A woman standing on the ground sees a rocket ship move past her at 95 % of the speed of light. Compared to when the rocket is at rest, the woman measures the rocket's length as
shorter
Compared to clocks in a stationary reference frame, clocks in a moving reference frame run
slower.
When uranium emits a beta particle, the result is a
transuranic element.
A hypothetical how many spectral atom has four distinct energy states. lines can this atom produce? Assuming all transitions are possible
6
When'thorium (A 90) emits a beta particle, the resulting nucleus has atomic number
89.