Mass of the proton Mass the neutrons and is MeV ()pmen≈ () ~,1
000 ()≈×21001−27 kg ≈ amu
● Most people have probably previously encountered Einstein's mass energy
conversion in the context of atomic and hydrogen bombs.
PAGE 10
● Einstein's happiest thought was about something falling freely under gravity, and
he never explained why the thought occurred to him. It has been suggested that
he might have been thinking about a patent application for an elevator.
● Special Relativity is based upon the same physical principles as General
Relativity.
● The predictions and results arising from Special Relativity are widely publicized,
yet General Relativity is much less widely known.
PAGE 11
● General Relativity is a theory of gravity, and will one day be replaced by some
other ideas that match experiment and observation better.
● Physicists are constantly testing the predictions of General Relativity, and one
day someone will find a chink in its armour.
● Inertial and non-inertial frames of reference are defined as above, and real forces
can occur in both. Pseudo forces occur in non-inertial frames of reference, and
arise because the frame of reference is moving in a way that causes the object's
movement to diverge from Newton's first law of motion.
● Pseudo (inertial) forces result from non-inertial frames of reference, real forces
exist in both, and pseudo forces disappear within the correct frame of reference.
PAGE 12
● If you are now thoroughly bewildered, a practical example may help: when your
car broke down, you felt a pseudo force from the car seat pushing you forward.
● If you pushed on the steering wheel and the seat pushed back on you, the forces
were in balance and you did not accelerate within the frame of reference given by
the inside of the car.
000 ()≈×21001−27 kg ≈ amu
● Most people have probably previously encountered Einstein's mass energy
conversion in the context of atomic and hydrogen bombs.
PAGE 10
● Einstein's happiest thought was about something falling freely under gravity, and
he never explained why the thought occurred to him. It has been suggested that
he might have been thinking about a patent application for an elevator.
● Special Relativity is based upon the same physical principles as General
Relativity.
● The predictions and results arising from Special Relativity are widely publicized,
yet General Relativity is much less widely known.
PAGE 11
● General Relativity is a theory of gravity, and will one day be replaced by some
other ideas that match experiment and observation better.
● Physicists are constantly testing the predictions of General Relativity, and one
day someone will find a chink in its armour.
● Inertial and non-inertial frames of reference are defined as above, and real forces
can occur in both. Pseudo forces occur in non-inertial frames of reference, and
arise because the frame of reference is moving in a way that causes the object's
movement to diverge from Newton's first law of motion.
● Pseudo (inertial) forces result from non-inertial frames of reference, real forces
exist in both, and pseudo forces disappear within the correct frame of reference.
PAGE 12
● If you are now thoroughly bewildered, a practical example may help: when your
car broke down, you felt a pseudo force from the car seat pushing you forward.
● If you pushed on the steering wheel and the seat pushed back on you, the forces
were in balance and you did not accelerate within the frame of reference given by
the inside of the car.
