Practice Test for Physics and Human Affairs from Tamara Snyder
Practice Test for Physics and Human Affairs from Tamara Snyder PHYS1023 001
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This 4 page Study Guide was uploaded by Koehne Barlow on Wednesday February 24, 2016. The Study Guide belongs to PHYS1023 001 at University of Arkansas taught by Tamara Snyder in Fall 2015. Since its upload, it has received 64 views.
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Date Created: 02/24/16
! 1.! How many protons are in the nucleus of a neutral calcium atom? ! a.! impossible to determine with the information given ! b.! 10 ! c.! 20 ! d.! 30 ! e.! 40 "! ! ! 2.! Which of the following is one of the sources of the atmospheric ozone problem? ! a.! coal-ﬁred generating plants. ! b.! cutting down forests. ! c.! nuclear power plants. ! d.! certain types of air-conditioner coolant. "! ! ! 3.! Chloroﬂuorocarbons seem to be responsible for destroying some of our atmospheric ozone. In which region of the atmosphere does this take place? ! a.! ionosphere ! b.! stratosphere ! c.! troposphere ! d.! mesosphere "! ! ! 4.! Which of the following waves has the higher frequency? ! a.! the one on the bottom ! b.! the one on top ! c.! both have the same frequency ! d.! neither one has a frequency at all "! ! ! 5.! According to Maxwell's equations, a changing magnetic ﬁeld creates... ! a.! nothing ! b.! a gravitational ﬁeld ! c.! an electric charge ! d.! an electric ﬁeld ! e.! another magnetic ﬁeld "! ! ! 6.! Are average global temperatures warmer now than in the past? ! a.! Yes, they have gone up by about 5 degrees Fahrenheit over the past 100 years ! b.! No, temperatures remain steady, but scientiﬁc theories on Global Warming predict a tempera- ture rise ! c.! Yes, they have gone up by about 1 degree Fahrenheit over the past 100 years ! d.! No, in fact temperatures have gone down over the past century "! ! ! 7.! How do you know that the force between two bar magnets is not due to gravity? ! a.! most physicists believe the magnetic force is due to the force of gravity ! b.! "the force between bar magnets can be repulsive, while the gravitational force is always attrac- tive" ! c.! "the force between bar magnets can be attractive, while the gravitational force is always repul- sive" ! d.! the force between bar magnets is far too weak to be caused by gravity "! ! ! 8.! The speed of light in a vacuum is ! a.! 3 million km/s ! b.! 300 km/s ! c.! 300,000 km/s ! d.! 3000 km/s "! ! ! 9.! Which of the following experiments support Einstein's principle of the constancy of lightspeed? ! a.! the electron double-slit experiment ! b.! the double-slit experiment with light ! c.! the Michelson-Morley experiment ! d.! the photoelectric effect "! ! ! 10.! consider two water waves, each with an amplitude of 6 cm. What is the level of the water where a crest of one wave meets a crest of the other wave? ! a.! 12 cm below the undisturbed water level ! b.! 0 cm - right at the undisturbed water level ! c.! 6 cm below the undisturbed water level ! d.! 6 cm above the undisturbed water level ! e.! 12 cm above the undisturbed water level "! ! ! 11.! A certain atom of cobalt has 25 electrons. What can we say about this atom? ! a.! It is a neutral atom ! b.! it is a positive ion ! c.! it is a negative ion ! d.! none of these answers is correct "! ! ! 12.! According to Einstein's mass-energy relation, ! a.! a baseball has slightly less mass when it is moving than it does when it is not moving ! b.! a warm bowl of soup has slightly more mass than the same bowl of soup when it is cold ! c.! both of the above ! d.! none of the above "! ! ! 13.! Widespread use of fossil fuels will probably result in warming Earth. This is due to ! a.! release of CO 2 ! b.! release of CFCs ! c.! increased acidity of the atmosphere ! d.! the large amount of heat released by fossil fuels "! ! ! 14.! Which has a longer wavelength: x-rays or infrared light? ! a.! x-rays ! b.! infrared light ! c.! they both have the same wavelength ! d.! neither one has a wavelength "! ! ! 15.! An interesting difference between wave motion and particle motion is ! a.! wave motion transfers only matter while particle motion transfers only energy ! b.! wave motion transfers both energy and matter while particle motion transfers only energy ! c.! wave motion transfers only energy while particle motion transfers both energy and matter ! d.! wave motion transfers only energy while particle motion transfers only matter ! 16.! What causes Earth's magnetic ﬁeld? ! a.! electric currents in the upper atmosphere ! b.! charged particles at rest in the clouds and lower atmosphere ! c.! electric currents in the sun ! d.! electric currents in Earth's core "! ! ! 17.! Who ﬁrst set up the double slit experiment with light? ! a.! Young ! b.! Thompson ! c.! Maxwell ! d.! Newton ! e.! Einstein "! ! ! 18.! Which of the following would have no rest-mass? ! a.! the International Space Station ! b.! helium nuclei ! c.! gamma rays ! d.! an electron ! e.! a baseball "! ! ! 19.! What is the charge of a proton? ! a.! negative ! b.! positive ! c.! the proton has no charge at all "! ! ! 20.! Velma's spaceship is 10 m long (as measured by Velma). She passes Mort at a speed of 0.45c (relative to Mort). How long is her spaceship as measured by Mort? ! a.! between 11 m and 12 m ! b.! 4.5 m ! c.! 8 m ! d.! 9 m ! e.! 6 m "! ! ! 21.! Consider a water wave with an amplitude of 2 cm. How high above the undisturbed water level (the normal water level) is the top of the wave crest? ! a.! can't be determined with the information given ! b.! 1 cm ! c.! 2 cm ! d.! 0.5 cm ! e.! 4 cm "! ! ! 22.! What year did Albert Einstein publish his paper on the special theory of relativity? ! a.! 1905 ! b.! 1900 ! c.! 1910 ! d.! 1915 ! 23.! You are in a spaceship moving past Earth at nearly lightspeed. You measure your own mass, pulse rate, and size. How have they changed from the mass, pulse rate, and size that you measured when you were on Earth? ! a.! mass has increased, pulse rate is faster, and size is lengthened along the direction of motion ! b.! mass has decreased, pulse rate is faster, and size is reduced along the direction of motion ! c.! mass has decreased, pulse rate is slower, and size is reduced along the direction of motion ! d.! mass has increased, pulse rate is slower, and size is reduced along the direction of motion ! e.! They haven't changed - they are normal ! ! " ! 24.! Which travels faster in a vacuum, visible light or radio waves? ! a.! they both travel with the same speed ! b.! visible light ! c.! radio waves "! ! ! 25.! If you put a positively charged object and a negatively charged object near each other, there will be a force between them (assume the objects are stationary). Will this be an electric force or a magnetic force? Will it be attractive or repulsive? ! a.! attractive magnetic force ! b.! attractive electric force ! c.! repulsive magnetic force ! d.! repulsive electric force Answers: problem 1 c 2 d 3 b 4 a 5 d 6 c 7 b 8 c 9 c 10 e 11 b 12 b 13 a 14 b 15 c 16 d 17 a 18 c 19 b 20 d 21 c 22 a 23 e 24 a 25 b
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