Emissions from alpha decay require the least amount of shielding. Which best des
ID: 1624221 • Letter: E
Question
Emissions from alpha decay require the least amount of shielding.
Which best describes why the emissions from alpha decay are so easily blocked compared to the emissions of other types of radioactive decay?
a. Alpha decay releases visible light, which has less energy than the light released during gamma decay.
b. Alpha decay releases particles that have less mass and charge than the particles released during beta decay.
c. Alpha decay releases particles that have less mass and charge than the particles released during gamma decay.
d. Alpha decay releases particles that have more mass and charge than the particles released during beta decay.
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A current of 1.8 A delivers 2.5 C of charge.
How much time was required?
e. 0.70 s
f. 0.72 s
g. 1.4 s
h 4.5 s
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Which fields would most likely make use of spectroscopy techniques? Check all that apply.
i. food production
j. medical research
k. scientific research
l. space research
m. weather forecasting
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Which factors affect the strength of a magnetic field around a current-carrying wire? Check all that apply.
m. the type of metal of the wire
n. the amount of the current
o. the direction of the current
p. the temperature of the wire
q. the distance from the wire
Which best contrasts sublimation and vaporization?
r. Sublimation involves a change from a solid, and vaporization involves a change from a liquid.
s. Sublimation results in a gas, and vaporization results in a liquid.
t. Sublimation involves the absorption of heat, and vaporization involves the release of heat.
u. Sublimation involves the release of heat, and vaporization involves the absorption of heat.
At night, the demand for electricity supplied by a fission nuclear reactor decreases. How is the fission nuclear reaction controlled to avoid overproduction of electricity?
a. The temperature of the reactor is lowered because high temperature and pressure are needed.
b. The temperature of the reactor is raised because the reaction slows down at higher temperatures.
c. The exposure between the fuel rods and a neutron-absorbing material is increased.
d. The exposure between the fuel rods and a neutron-absorbing material is reduced.
The image shows the right-hand rule being used for a current-carrying wire.
Which statement describes what the hand shows?
e. When the current flows down the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
f. When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
g. When the current flows down the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
h When the current flows up the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
What is the main difference between a permanent magnet and a temporary magnet?
i. A permanent magnet is made of a ferromagnetic material, while a temporary magnet is not.
j. A temporary magnet attracts only metal objects, while permanent magnets attract both metal objects and other magnets.
k. The domains in a temporary magnet easily lose alignment, but the domains in a permanent magnet keep their alignment.
l. There are domains in a permanent magnet, but not in a temporary magnet.
A sound from a source has an intensity of 270 dB when it is 1 m from the source.
What is the intensity of the sound when it is 3 m from the source?
m. 30 dB
n. 90 dB
o. 810 dB
p. 2430 dB
Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle’s scrap metal yard.
After picking up several staples with the device, what change would enable Tony to drop the staples in the scrap metal bin?
q. removing the battery
r. removing the iron nail
s. moving the wire loops closer together
t. spreading the wire loops farther apart
Describe the shape of liquid water as it is poured into a glass.
a. The shape stays the same as it was before it was poured.
b. The shape changes to fit the glass and then stays the same.
c. The shape stays the same, and the shape of the glass changes.
d. The shape changes and continues to change long after pouring stops.
A –0.06 C charge that is pointing downward is placed in a uniform electric field with a strength of 200 N/C. What is the magnitude and direction of the force on the charge?
e. 12 N up
f. 12 N down
g. 3333 N up
h. 3333 N down
Aluminum has a frequency threshold of 9.846 × 1014 Hz. Which best explains what will happen when light with a frequency below the frequency threshold strikes aluminum?
a. Electrons will be ejected immediately.
b. No electrons will be ejected.
c. Electrons will start being ejected several seconds after the light strikes the aluminum.
d. No electrons will be ejected unless the intensity is very high.
A boat moves up and down on a lake as a wave passes by. If the boat oscillates 10 times in 2 seconds, what is the period of the wave?
e. 0.2 seconds
f. 2 seconds
g. 5 seconds
h. 10 seconds
The diagram shows the electric field lines around two charges.
Based on the field lines, what is the best description of the charges?
a. They are negative, and they repel.
b. The left is negative and the right is positive, so they attract.
c. The left is positive and the right is negative, so they attract.
d. They are positive, and they repel.
The distance between a charge and the source of an electric field changes from 3 mm to 6 mm.
As a result of the change, the electric potential energy of the charge is
e. divided by 6
f. divided by 2
g. multiplied by 2
h. multiplied by 6.
Once started, why can nuclear fission continue to occur on its own?
a. The thermal energy released can cause the products to join.
b. The neutron formed by the reaction can cause more nuclei to combine.
c. The thermal energy released can cause the products to split.
d. A neutron begins the reaction, and more neutrons are formed in it.
Which are characteristics of a ray when it hits a boundary and reflects, but not when it hits the boundary and refracts? Check all that apply.
e. changes direction
f. changes speed
g. does not change direction
h. does not change speed
i. bounces off the boundary
j. passes through the boundary
Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?
a. brachytherapy
b. superficial external beam radiation therapy
c. radiopharmaceuticals
d. high intensity focused ultrasound
Two identical waves are traveling toward each other in the same medium. One has a positive amplitude, meaning that its peaks only go upward, and the other wave has a negative amplitude, with peaks going downward.
What will occur when the waves peak at the same place at the same time?
e. constructive interference
f. destructive interference
g. a reflecting wave
h. wave refraction
A bell is rung. What best describes the density of air around the bell?
a. The air density does not change.
b. The air density increases and then returns to normal levels.
c. The air density decreases and then returns to normal levels.
d. The air density increases and decreases repeatedly before returning to normal.
Takumi works in his yard for 45 minutes each Saturday. He works in the morning, and he wears sunscreen and a hat each time he works in the yard.
What does Takumi hope to reduce through his actions?
e. the likelihood of stochastic effects, such as DNA mutations
f. the severity of stochastic effects, such as cancer
g. the severity of non-stochastic effects, such as cancer
h. the likelihood of non-stochastic effects, such as radiation sickness
Which best describes the heat that you can feel on the engine of a running car?
a. The heat is unusable and absorbed by the engine.
b. The heat is usable and absorbed by the engine.
c. The heat is unusable and lost to the surroundings.
d. The heat is usable and lost to the surroundings.
Explanation / Answer
Alpha decay releases visible light,Which less energy than the light released during gamma decay.
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