AnswersPhysics in the UniverseN/A

N/A — Exam Answers

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1
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What is the bes t conclusion about the charges that can be made based on the diagram?

A
Y and Z are like charges, but their identities cannot be determined.
B
Y is negative, and Z is positive.
C
Y is negative, and Z is negative.
D
Y and Z are opposite charges, but their identities cannot be determined.
2
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After picking up several staples with the device, what change would enable Tony to drop the staples in the scrap metal bin?

A
spreading the wire loops farther apart
B
removing the iron nail
C
moving the wire loops closer together
D
removing the battery
3

How do whale fossils provide evidence for evolution?

A
They show that whales adapted various body shapes from a common ocean-dwelling ancestor.
B
They show changes in body structures over time in response to the animals' habitats.
C
They indicate how organisms remain unchanged over time despite changes in their environment.
D
They prove that living things evolve from smaller to larger organisms over time.
4

Which best explains the arrow’s purpose in the diagram?

A
It is showing the direction that electrons move in, making the sphere positive.
B
It is showing the direction that protons move in, making the sphere negative.
C
It is showing the direction that electrons move in, making the sphere negative.
D
It is showing the direction that protons move in, making the sphere positive.
5

Astronomers have discovered a new galaxy with a redshift of z=0.100 What can they infer about its velocity and distance compared to the galaxies in the table?

A
The new galaxy has a higher velocity and is farther away than all the galaxies in the table.
B
The new galaxy has a higher velocity but is closer than all the galaxies in the table.
C
The new galaxy has a lower velocity but is farther away than all the galaxies in the table.
D
The new galaxy has a lower velocity and is closer than all the galaxies in the table.
6

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 decreases and then returns to normal levels.
C
The air density increases and decreases repeatedly before returning to normal.
D
The air density increases and then returns to normal levels.
7

Once started, why can nuclear fission continue to occur on its own?

A
The neutron formed by the reaction can cause more nuclei to combine.
B
The thermal energy released can cause the products to split.
C
The thermal energy released can cause the products to join.
D
A neutron begins the reaction, and more neutrons are formed in it.
8

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
radiopharmaceuticals
B
high intensity focused ultrasound
C
superficial external beam radiation therapy
D
brachytherapy
9

What do MRI and ultrasound have in common as diagnostic imaging techniques? Choose three correct answers.

A
tomographic imaging
B
low risk for tissue damage
C
noninvasive
D
no radiation
E
uses radio waves
10

A seismograph at Station A records a P wave followed by an S wave 30 seconds later. Station B, located farther away, records a 50-second gap between wave arrivals. What conclusion can be drawn from comparing these two stations?

A
Station A recorded a deeper earthquake.
B
Station A is closer to the epicenter than Station B.
C
Station B experienced a higher-magnitude earthquake.
D
Station B is located above the earthquake's focus.
12

Which factors affect the strength of a magnetic field around a current-carrying wire? Choose two correct answers.

A
the distance from the wire
B
the amount of the current
C
the direction of the current
D
the temperature of the wire
E
the type of metal of the wire
13

Which lists the correct steps that occur when using a diffraction grating to bend light?

A
light strikes the grooves right arrow different wavelengths of light bend at different angles right arrow diffracted wavelengths reach the eyes right arrow the eyes see different colors
B
different wavelengths of light bend at different angles right arrow light strikes the grooves right arrow diffracted wavelengths reach the eyes right arrow the eyes see different colors
C
diffracted wavelengths reach the eyes right arrow the eyes see different colors right arrow light strikes the grooves right arrow different wavelengths of light bend at different angles
D
diffracted wavelengths reach the eyes right arrow different wavelengths of light bend at different angles right arrow the eyes see different colors right arrow light strikes the grooves
14

Which electromagnetic wave transfers the least amount of energy?

A
gamma
B
microwave
C
cap x -ray
D
ultraviolet
15

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?

A
constructive interference
B
a reflecting wave
C
destructive interference
D
wave refraction
16

What is the best description of a wave?

A
matter that is moved from one place to another
B
a disturbance that moves matter
C
a medium disturbed by a vibration
D
a pulse that carries energy
18

Fossils of Lepidodendron , an ancient tree-like plant, have been found in central and northern Europe, North America, and Asia. These fossils are found in coal deposits that formed in tropical swamps. Choose the correct answer from each drop-down menu to complete the statements.

Answer:

warm and wet|connected

20

Match each continental feature with the tectonic process responsible for its formation.

Answer:

the motion of plates at a divergent boundary|a collision between two continental plates|the subduction of an oceanic plate beneath a continental plate|two plates sliding past each other along a transform boundary

22

Force cap f acts between two charges, q sub 1 and q sub 2 , separated by a distance d If q sub 1 is increased to twice its original value and the distance between the charges is also doubled, what is the new force acting between the charges in terms of cap f ?

A
1 fourth cap f
B
1 half cap f
C
cap f
D
2 cap f
24

What is the main difference between a permanent magnet and a temporary magnet?

A
There are domains in a permanent magnet, but not in a temporary magnet.
B
A permanent magnet is made of a ferromagnetic material, while a temporary magnet is not.
C
A temporary magnet attracts only metal objects, while permanent magnets attract both metal objects and other magnets.
D
The domains in a temporary magnet easily lose alignment, but the domains in a permanent magnet keep their alignment.
26

Which changes in an electric motor will make the motor stronger? Choose three correct answers.

A
using a weaker permanent magnet
B
increasing the distance between the magnets
C
decreasing the distance between the magnets
D
increasing current in the electromagnet
E
decreasing current in the electromagnet
F
using a stronger permanent magnet

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