Which scientist discovered that the universe is made up of galaxies? Correct answer-
Hubble
One half second after starting from rest, a freely falling object will have a speed of about
Correct answer- a = Vf-Fi / t , 9.8m/s^2 = Vf - 0 / .5s, Vf = 4.9 m/s
Which part of the sun is the outermost l...
which scientist discovered that the universe is made up of galaxies
which part of the sun is the outermost layer
which part of the sun i considered the apparent surface of the sun
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PHY 102
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PHY 102 Final Exam
Which scientist discovered that the universe is made up of galaxies? Correct answer-
Hubble
One half second after starting from rest, a freely falling object will have a speed of about
Correct answer- a = Vf-Fi / t , 9.8m/s^2 = Vf - 0 / .5s, Vf = 4.9 m/s
Which part of the sun is the outermost layer? Correct answer- Corona
The slope of a velocity vs time graph tells you the Correct answer- acceleration
True or False: The universe is expanding. Correct answer- True
Stars that have ___ mass than the sun will end their lives as brown dwarfs. Correct
answer- Less
Which part of the sun i considered the apparent surface of the sun? Correct answer-
Photosphere
Acceleration is the measure of the change in what? Correct answer- Velocity
Which of the following is a private research lab? Correct answer- Carnegie Institution
Which of the following is Kepler's first law? Correct answer- Planets move in elliptical
orbits with the sun at one focus
Which of the following is not part of the scientific method? Correct answer- Belief
In the SI unit system, mass is measured in units of Correct answer- Kilograms
True or False: Velocity has a direction Correct answer- True
True or False: Stars that are moving away from us are called "red-shifted". Correct
answer- True
In each second of a fall, the distance a freely falling object will fall is Correct answer-
Increasing
The language of physics is Correct answer- Mathematics
Approximately how old is the universe? Correct answer- 15 billion years
, If a car increases its velocity from zero to 60 km/h in 6 seconds, its acceleration in m/s/s
is Correct answer- 60km | 1000m | 1 hr | 1 min
1 hr | 1 km | 60 min | 60 s
= 16.67 m/s
a = 16.67 - = 2.8 m/s/s
Which astronomer was the first to put the sun at the center of the universe? Correct
answer- Copernicus
True or False: Stars do not shine during the day Correct answer- False
Which astronomer is credited with being the first to explain the complex motion of the
stars and planets? Correct answer- Ptolemy
An educated guess is a Correct answer- hypothesis
If a car accelerates form rest at 10 meters per second per second, its speed (in m/s) 3
seconds later will be about Correct answer- 10 m/s^2 = Vf-s
Vf = 30 m/s
In the SI unit system, time is measured in units of Correct answer- seconds
If an object falling freely were somehow equipped with an odometer to measure the
distance it travels, then the amount of distance it travels each succeeding second would
be Correct answer- greater than the second before
Which astronomer spent 25 years making measurements of the stars' and planets'
positions, only to die before the data was analyzed? Correct answer- Brahe
In which part of the sun does most fusion take place? Correct answer- Core
In SI units of acceleration are Correct answer- m/s/s
True or False: Telescopes are often placed on mountains because there is less
atmosphere at high elevations. Correct answer- True
Which of the following is Kepler's second law? Correct answer- A line from the sun to
the earth sweeps out equal areas in equal times
Which an object near the Earth's surface is in free fall, its Correct answer- velocity
increases
Which of the following is a government research lab? Correct answer- Argonne National
Lab
Which element is most abundant in stars? Correct answer- Hydrogen
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