121⟩ In beta minus emission, the number of nucleons in the atom
1. increases by one
2. decreases by one
3. increases by four
4. remains the same
Answer: D
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192 Physics Questions And Answers
122⟩ Physicists most commonly call a mass moving in a straight line path as having
1. angular or rotational momentum
2. straight momentum
3. translational momentum
4. second order momentum
Answer: C
123⟩ A figure skater who, while spinning in place, pulls her arms in to increase her rotational speed, is most closely exhibiting which of the following
1. conservation of angular momentum
2. centrifugal force
3. satellite motion
4. centripetal acceleration
Answer: A
124⟩ The atoms nucleus is held together by which of the following
1. strong interactions of the quark and gluon constituents of the atom’s nucleus
2. strong interactions of the quark and lepton constituents of the atom’s nucleus
3. weak interactions of the quark and lepton constituents of the atom’s nucleus
4. strong interactions of the lepton and gluon constituents of the atom’s nucleus
Answer: A
125⟩ Which of the following is NOT true of Guglielmo Marconis experiments on wireless transmission
1. in 1901 he transmitted a signal from Newfoundland to England
2. he defied current belief on line-of-sight transmission
3. his work was a practical application of the work of James Clerk Maxwell
4. his success was a vindication of his belief in the reflective properties of the ionosphere
Answer: D
126⟩ Which of the following is NOT an example of a transverse wave
1. ocean wave
2. light wave
3. microwave
4. sound wave
Answer: D
127⟩ For particles that have mass, such as electrons, quantum theory gives the relationship of wavelength to momentum by which of the following formulas, where c is the speed of light, v is the particles speed, h is Plancks constant, m is the particles mass, and f is frequency
1. wavelength = mc2
2. wavelength = c / ƒ
3. wavelength = h /mv
4. wavelength = hf
Answer: C
128⟩ The Department of Energys B-Factory at the Stanford Linear Accelerator Lab is designed to collide electron and positron beams of unequal energies and produce millions of these particles, which are commonly called
1. B mesons
2. B leptons
3. B muons
4. B neutrons
Answer: A
129⟩ Certain products have been designed so that people wearing headphones do not hear the objectionably loud sound from certain machinery with which they are working. These headphones most likely work based on which one of the following principles
1. doppler effect
2. destructive interference
3. constructive interference
4. audiopolarization
Answer: B
130⟩ According to Coulombs Law, if two charged particles are repelled with a given force at a distance d, by what multiple will the force decrease by if d is increased by 4 times?
16 times
131⟩ Which of the following is the most accurate reason why a light bulb dropped on a rug does not break, but when dropped on a tile floor it does break
1. the time it takes to stop moving is less for the tile
2. the change in momentum is greater for the tile
3. the light bulb weighs more when it hits the tile
4. the change in momentum is greater for the rug
Answer: A
132⟩ The lowest frequency that determines the pitch of a musical note is most commonly called the
fundamental
133⟩ Order the following from the WORST electrical conductor to the BEST electrical conductor glass, rubber, iron, dry wood
rubber,
glass,
dry wood,
iron
134⟩ A bullet of mass m travelling at velocity v has a kinetic energy of ½mv2 when it strikes a ballistic pendulum of mass 1000 grams. The kinetic energy of the two masses moving together just after the moment of impact is about a thousand times smaller than ½mv2. What has most of the bullets initial kinetic energy been converted to?
heat
135⟩ In the 19th century, this Scottish scientist showed that all magnetic and all electric phenomena could be described by four equations that often bear his name. What is his name?
James Clerk Maxwell
136⟩ When Thomas Edison was promoting the wide use of direct current, this personal enemy of Edisons was the chief proponent and expert in alternating current
Nikola Tesla
137⟩ When a green colored object is illuminated by a green light it will appear as what color to the human eye?
Green
138⟩ How many more times louder is 70 decibels than 10 decibels?
One Million
139⟩ What is the general term for the kind of material usually placed between the conducting plates of a capacitor?
Dielectric
140⟩ While at Berkeley, Melvin Calvin used this radioisotope to decipher many of the complex processes of photosynthesis
Carbon 14
