35 Questions
| Total Attempts: 39

Questions from Test I-II

Questions and Answers

- 1.Einstein was runner-up to Ghandi for Time's Man of the 20th Century?
- A.
False

- B.
True

- 2.The Fifth Postulate of Euclidean Geometry can be proven from the other four postulates?
- A.
No

- B.
Yes

- 3.What group of scientists helped create the Maxwell Equation?
- A.
Unknown Greek Scientists

- B.
Ampere, Coulomb, Faraday, and Gauss

- C.
No group, just Maxwell

- 4.What is the main conclusion of Einstein's disription of Brownian Motion?
- A.
Direct proof of the existence of a black hole at the center of all galaxies

- B.
Direct evidence of the existence of atoms

- C.
Gazelles should e placed on the endangered species list.

- 5.What was Einsteins Miraculous year?
- A.
1905

- B.
1918

- C.
1915

- 6.Einstein described the photoelectric effect and Brownian moion, and created special realitivity in different years.
- A.
True

- B.
False

- 7.Which object of spacetime physics led to the conclusion E=mc^2
- A.
The pressure of laser lights acting on mirrors

- B.
Objects moving at the speed of light are so dense they turn into energy

- C.
The union of energy and momentum into a four-dimensional vector

- 8.How can one represent four-dimensional spacetime as a drawing in three demensions?
- A.
A lattice-work of rulers

- B.
A lattice-work of rulers and one clock

- C.
A lattice-work of rulers, with a clock at each point of the lattice where the rulers connect.

- 9.After Maxwell completed the equations that are named after him, what was he able to predict?
- A.
Electromagnetic waves move at the speed of light

- B.
Electromagnetic waves move at the speed of sound

- 10.Einsteins description of the photoelectric effect is able to explain which two phenomena?
- A.
The energy of emitted electrons is independent of the intensity of the incident light, and the number electrons emitted is independent of the frequency of the incident light.

- B.
The energy of emitted electrons is dependent on the intensity of the incident light, and the number of electrons emitted is depend of the frequency of the incident light.

- 11.When the magnetic flux through a circle of conducting wire changes with time, what is the main responce of the wire
- A.
To develop and electric current

- B.
Balckbody radiation

- 12.There are magnetic charges that can act as soruces or sinks of magnetic flux?
- A.
No

- B.
Yes

- 13.Chose the most correct statement.
- A.
Pythagoras Theorem can be used to calculate distances in space-time with no modifications

- B.
Pythagoras Theorem can be used to calculate distances in space-time, bt the time park has a minus sign in front of it.

- 14.Intertial observers always observe the same acceleration of an object as non-intertail observies
- A.
True

- B.
False

- 15.Weight W is given by mass m times the accleration due to gravity g; i.e. W= m*g. For the Earth the accleration due to gravity has the value 9.8 m/s^2 but on the Moon it is 1/6 thatt of earths. Determine the weight of a person on the moon whose weight on earth is 600 Newtons.
- A.
110 N

- B.
83.7 N

- 16.Are there lines that can be drawn in spacetime that violate cause and effect
- A.
No

- B.
Yes

- 17.The First Law of Newtonian Mechanics can be proven from the Second Law of Newtonian Mechanics.
- A.
No

- B.
Yes

- 18.What is the angle tat a light-cone makes with the spacial axes, x,y, or z assuming that the time axis is labeled by c(t) where c is the speed of light
- A.
0

- B.
45

- 19.The classical model of the atom does not work since it decays because of electromagnetic radiation
- A.
Yes

- B.
No

- 20.The bohr model of the atom can be used to describe the spectral properties of all atoms of the periodic table.
- A.
True

- B.
False

- 21.Which of the following describes best electrons and positirons
- A.
There are no differences

- B.
Electrons are matter and positrons are their anti-matter partners

- C.
Positirons are the positive charges in atomic nuclei of the periodic table whereas the electrons are in the orbitals of atoms

- 22.When Dirac combined special relativity with quatum mechanics he made a startling discovery. Which of the following is Dirac's discover
- A.
Quantum mechanics is invalidated

- B.
Special relativity is invalidated

- C.
The existence of anti-matter

- 23.What is a photon
- A.
A particle associated with the electromagnetic radiation

- B.
Another form of the electron

- 24.The standard model does not incorporate all currently known fundamental forces of nature at a quantum level: strong, weak, elctromagnetic, and gravity
- A.
No

- B.
Yes

- 25.Temperature plays no role in the shape of a blackbody's spectrum
- A.
False

- B.
True