WorksheetsPHYSICS 2_RECITATION
Total questions: 50
Worksheet time: 2hrs 53mins
The speed of light (c) =
3 x 108 miles/hour
3 x 108 meters/second
3 x 108 kilometers/hour
none of these
The special theory of relativity was derived by:
Galileo
Newton
Einstein
Maxwell
One of the consequences of time dilation is that a moving clock ______________ relative to a stationary observer.
Speeds up
Slows down
Compared to clocks in a stationary reference frame moving clocks run
faster
slower
at the same rate
Why is Special Relativity "special"?
It's for all cases
It's only for objects moving at a constant velocity
It's only for accelerating objects
It's for objects rotating
To which of the following can the concepts of Newtonian mechanics be applied to?
Objects with speed twice the speed of light.
Objects with speed much greater than the speed of light.
Objects with speed equal to the speed of light
Objects with speed much smaller than the speed of light.
At what rate do the EM waves travel according to Maxwell's eelectromagnetic wave theory?
3 x 10^-8m/s
6x10^8 m/s
3x10^8m/s
6x10^-8 m/s
Which of the following shows the conflict between Newtonian mechanics and Maxwell's electromagnetic theory? Choose all that apply
Maxwell's electromagnetic theory proposed that speed of light is not constant.
Newtonian mechanics tells that the speed of light depends on the speed of the observer.
Newtonian mechanics tells that the speed of light is constant.
Maxwell's electromagnetic theory tells that the speed of light depends on the speed of the observer.
Which of these resolves the conflict between Newtonian mechanics and Maxwell's electromagnetic theory?
Theory of General Relativity
Theory of Universal Gravitation
Theory of Special Relativity
Law of Conservation of Energy
Einstein's theory of special relativity is based on what two postulates? Choose all that apply.
The laws of physics are the same in all inertial frames of reference moving with constant velocity relative to one another.
The speed of light is constant in all inertial frame of reference.
The laws of physics application change based on the condition of the observer.
The speed of light depends on the speed of the observer.
Which of the following characteristics did Einstein explain the problems that involve frames of reference ?
constant linear speed
constant direction
constant linear velocity
constant acceleration
Which of the following describes the speed of light according to Newtonian mechanics?
The speed of light is constant.
The speed of light depends on the speed of the observer.
The speed of light depends on its source.
The speed of light is infinite.
In resolving the conflict between Newtonian mechanics and Maxwell's electromagnetic theory, what concepts of transformation was used?
Einstein transformation
Maxwell transformation
Lorentz transformation
Galelian transformation
What expression was added to Galilean transformation to make it into Lorentz transformation?
1−c2v1
1−cv21
1−c2v21
1−cv1
What does Hubble's law states?
It states that speed of distant galaxy is inversely related to its distance from earth.
It states that the color of distant galaxy and its distance from earth has an inverse square law relationship.
It states that speed of distant galaxy and its distance from earth has an inverse square law.
It states that the speed of distant galaxy is directly related to its distance from earth.
Hubble base on his observation stated that the universe is expanding. What were his bases of saying this?
Distance of galaxies from earth.
Recessional velocities of distant galaxies.
Doppler shift of distant galaxies.
Color of the stars in the distant galaxies.
Which of the following statements regarding the center of the universe is correct?
The universe has no center for its boundaries are beyond reach to be measured.
Milky way is the center of the universe for Hubble observed that everything in the universe is moving away from it.
The universe has no center and everything in it is moving away from each other in all directions.
Andromeda galaxy is the center of the universe for everything in the universe in moving away from it.
What two quantities define the end of the expanding universe?
The average density of the matter contained by the universe and the distances of the galaxies from earth.
The distance of galaxies from earth and the rate of how fast they move away from earth.
The velocities of the galaxies and the average density of matter contained by the universe.
The average density of matter contained by the universe and the rate at which the universe expands.
What is an extrasolar planet?
A planet that is big and gaseous.
It is also called exoplanets.
All planets in the universe.
A planet that is small and gaseous.
Doppler shift and transit are what type of method in detecting extrasolar planets?
advanced methods
indirect methods
direct methods
simple methods
What is Doppler Effect?
It is the change in the color of a wave due to the movement of the source.
It is the change in the speed of the wave due to the movement of the source.
It is the change in the distance of a wave due to the movement of the source.
It is the change in the wavelength of a wave due to the movement of the source.
When light source moves toward an observer what happens to its wavelength?
The wavelength is said to be red shifted.
The wavelength is said to be blue shifted.
The wavelength tends to move to the red end of the spectrum.
The wavelength tends to compress producing shorter wavelength.
When a planet passes across its parent star, it causes the brightness of the star to slightly decrease. This method is used to detect extrasolar planets and this method is called
indirect method
direct method
transit
Doppler Effect
What type of extrasolar planets can be detected by Doppler shift and transit?
small and gaseous planets
big and gaseous planets only
small planets only
gaeous planets only
How is Doppler shift used in detecting extrasolar planets?
Scientists observed those stars which do no have Doppler shifts.
Scientists observed those stars which have red shift only.
Scientists observed whose stars which have blue shift only.
Scientists observed those stars which have blue and red shifts periodically.
Why can small planets like earth cannot be detected by either Doppler shift or transit method?
Small planets cannot decrease the star's brightness significantly to be observed.
Small planets cause too much change in the parent star's path of orbit.
Small planets are undetectable.
Small planets do not cause significant change in the parent star's path of orbit.
What method can be used to determine the distance of stars that are less than 300 light years away?
photometry
spectroscopy
parallax
parsec
Which of the following correctly defines one astronomical unit?
the distance of the Earth from the nearest galaxy
the distance of the Earth to the nearest planet in the solar system
the distance that the Earth travels in a year
the distance of the Earth from the Sun
If the distance of the star is increased three times what will happen to its brightness according to the inverse square law?
The brightness of the star will increase 8 times.
The brightness of the star will decrease 3 times.
The brightness of the star will increase 9 times.
The brightness of the star will decrease 9 times.
Which of the following correctly describes the luminosity of a star?
Measure of the absolute brightness of a star.
Total amount of energy emitted by a star per unit time.
Measure of the apparent brightness of a star.
Does not depend on the temperature of the star.
What does the inverse-square relationship between star's brightness and distance mean?
the star's brightness decreases proportionally to the square of distance
the star's brightness decreases proportionally when distance is doubled
the star's brightness increases proportionally when the distance is doubled
the star's brightness increases proportionally to the square of distance
Given a celestial body that is round and big enough to dominated everything on its orbit, can it be called a planet? Why?
No, because its size and mass were not yet known.
No, because it was not mentioned that it orbits the sun.
No, because the reason for it being round was not given,
Yes, because it satisfies the criteria which Pluto failed to have.
A dwarf planet is any celestial body that is round and orbits the sun. Which of the following dwarf planets is found between Mars and Jupiter?
Makemake
Ceres
Eris
Haumea
Bodies that are round and orbit around the sun but are not able to clear their path from other celestial bodies are called
star
asteroid
comet
dwarf planet
Which among the criteria for being a planet did Pluto fail to satisfy?
The celestial body should be round.
The celestial body should be hundred times heavier than its moon.
The celestial body should be able to clear its path from other celestial bodies.
The celestial body should orbit around the Sun.
Which celestial body was discovered that caused the demotion of Pluto into a dwarf planet?
Haumea
Ceres
Eris
Makemake
What made scientists review the classification of Pluto as a planet?
Pluto's orbit around the Sun that is tilted by 17 degrees.
The biggest moon of Pluto, Ceres, is almost half of its mass.
The discovery of bigger and heavier celestial bodies than Pluto.
The orbit of the Pluto around the Sun was elliptical
It is the shift in the wavelength of the emitted light which occurs when the source of light is moving relative to an observer.
Parallax
Astronomical Unit
Light years
Doppler Effect
Derive the mass from E=mc2
cE
cE
c2E
mE
