AnswersPhysics in the UniverseN/A

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A negative 0 point 0 6 cap c charge is placed is in a uniform electric field with a strength of 200 cap n over cap c What is the magnitude and direction of the force on the charge?

A
12 cap n in the opposite direction of the field
B
3333 cap n in the same direction of the field
C
12 cap n in the same direction of the field
D
3333 cap n up in the opposite direction of the field
28
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What is the best prediction for what will happen when all of the hydrogen in the Sun has undergone fusion?

A
Helium nuclei will split to form hydrogen, and the Sun will continue to release energy.
B
Helium nuclei will fuse to create heavier elements, and the Sun will continue to release energy.
C
Helium nuclei will split to form hydrogen, and the Sun will no longer release energy.
D
Helium nuclei will fuse to create heavier elements, but the Sun will no longer release energy.
30

Which shows the correct order of events after the big bang occurred?

A
quarks and electrons formed, electromagnetic and weak forces separated from the unified force, inflationary expansion occurred, strong force separated from the unified force, gravity separated from the unified force
B
electromagnetic and weak forces separated from the unified force, gravity separated from the unified force, strong force separated from the unified force, inflationary expansion occurred, quarks and electrons formed
C
gravity separated from the unified force, strong force separated from the unified force, inflationary expansion occurred, electromagnetic and weak forces separated from the unified force, quarks and electrons formed
D
strong force separated from the unified force, inflationary expansion occurred, quarks and electrons formed, electromagnetic and weak forces separated from the unified force, gravity separated from the unified force
31

A lightbulb has a resistance of 195 cap omega and carries a current of 0 point 6 2 cap A

Answer:

120.9

32

Which statement best describes what happens when a high-mass star reaches the end of its main sequence stage?

A
It slowly cools down into a brown dwarf.
B
It begins fusing helium into heavier elements.
C
It loses mass and becomes a white dwarf.
D
It immediately becomes a black hole.
33

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?

A
2 seconds
B
10 seconds
C
5 seconds
D
0 point 2 seconds
34

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 particles that have more mass and charge than the particles released during beta decay.
B
Alpha decay releases visible light, which has less energy than the light released during gamma decay.
C
Alpha decay releases particles that have less mass and charge than the particles released during beta decay.
D
Alpha decay releases particles that have less mass and charge than the particles released during gamma decay.
35

How does the asthenosphere contribute to the movement of tectonic plates?

A
Its flexible, slow-flowing material allows the lithospheric plates to move.
B
It forms rigid blocks that prevent plates from shifting.
C
Its high pressure locks the plates into place at subduction zones.
D
It generates magnetic fields that steer plate direction.
36

What is the amplitude of the resulting wave when the two waves meet at point cap x ?

A
4 point 0 cm
B
2 point 0 cm
C
1 point 0 cm
D
0 point 0 cm
37

Using the observed spectral shifts, sort each star into the correct category:

Answer:

Star A,Star D|Star B,Star E|Star C,Star F

38

By which factor is the sound intensity decreased at 3 meters?

A
1 fourth
B
1 ninth
C
1 half
D
1 third
39

Which shows the motion of the rope at Point P as the wave passes through it?

A
Image with description A dot vector drawn up and vector drawn down.
B
Image with description A dot with a vector drawn right and a vector drawn left.
C
Image with description A dot with a vector drawn up to the right and a vector drawn down to the left.
D
Image with description A dot with a vector drawn up to the left and a vector drawn down to the right.
40

Based on the field lines, what is the best description of the charges?

A
They are negative, and they repel.
B
They are positive, and they repel.
C
The left is negative and the right is positive, so they attract.
D
The left is positive and the right is negative, so they attract.
42

Choose the correct answer from each drop-down menu to complete the statement.

Answer:

26,400|distance from Earth

44

Which two order bands are the dimmest?

A
n is equal to 2 and n is equal to 3
B
n is equal to 0 and n is equal to 1
C
n is equal to 1 and n is equal to 2
D
n is equal to 0 and n is equal to 3
45

Which best illustrates how the carrier wave would likely appear after pulse modulation?

A
Image with description A radio wave going left to right. The lines are equal distance apart and equal distance from the middle line. Occasionally, a wave does not cross the middle line but instead arcs back making a double wave on one side of the line.
B
Image with description A radio wave going left to right. The waves are wide and equal distance as well as equal distance above and below the middle line.
C
Image with description A radio wave going left to right. There are two sets of waves separated by a solid line. The lines are equal distance apart and equal distance from the middle line.
D
Image with description A radio wave going left to right. The waves are tightly close together and equal distance as well as equal distance above and below the middle line.
46

Today, parts of the Kaapvaal Craton can be found in South Africa and Western Australia. What does that tell us about its history since its formation?

A
Differentiation caused volcanic outgassing that fractured the craton into separate pieces that shifted to their current positions over time.
B
Forces of continental movement broke the craton apart, and smaller parts of it collided and joined with other microcontinents.
C
It remained intact until very recently when ocean water eroded its center to separate the two pieces.
D
Mantle convection caused the craton to sink toward Earth's core and then be lifted back to the surface.
47

Which best describes the difference between wave A and wave B?

A
Wave B transfers more energy, but wave A has a greater intensity.
B
Wave A has a greater intensity and transfers more energy.
C
Wave A transfers more energy, but wave B has a greater intensity.
D
Wave B has a greater intensity and transfers more energy.
48

Which labels correctly identify the layers most closely associated with gamma rays and visible light?

A
X: Gamma rays Z: Visible light
B
Z: Gamma rays X: Visible light
C
Z: Gamma rays Y: Visible light
D
Y: Gamma rays Z: Visible light
49

Which statement describes what the hand shows?

A
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.
B
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.
C
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.
D
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.

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