Answer C is INCORRECT. The correct answer is "Rotation of liquid iron in the outer core." For example the text from my course states that "As Earth spins on its axis, rotation of the liquid outer core generates Earth's magnetic field."
The statement best explains how Earth's magnetic field is generated by the Rotation of liquid iron in the outer core
What is magnetic field of earth?Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core
The inner core (which is solid) is the hottest layer of the earth. It, therefore, contributes to heating up the outer core. The outer core is liquid and rotation of the earth (Coriolis effect) causes the molten rocks to swirl like a tornado.
Because the outer core is mostly made of metals, that have lost electrons and hence charged (due to the enormous heat), the swilring effect causing an electric effect.
This consequently causes the dynamo effect that creates a magnetic field. This magnetic field covers the earth and protects it from harmful radiation from the solar storms.
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Kinetic Energy - What does it depend on?
The _____________ an object moves, the _______________________________ it has.
Help!
Answer:
faster; more kinetic energy
Explanation:
Two pieces of broccoli are sitting on a table. They have the same temperature, but contain different amounts of heat energy. Which of the following MUST be TRUE?
A.
One piece is larger than the other.
B.
The pieces were cooked using different methods.
C.
One piece was dropped on the floor and the other was not.
D.
The pieces have different amounts of average kinetic energy per particle.
(i think its either A or D)
Answer:
I think the answer is B , The pieces were cooked using different methods
Answer:
A
Explanation:
The bigger the piece the more heat energy is in it
What are the different forms of radiation on the electromagnetic spectrum
Answer:
Radio, Microwave, Infrared, Visible Light, Ultraviolet, X-Ray, Gamma Ray.
The different forms of radiation on the electromagnetic spectrum include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each form has different properties and uses in various fields such as communication, cooking, medical imaging, and more.
Explanation:The electromagnetic spectrum consists of various forms of radiation, each with different properties. These include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Radio waves have the lowest frequency and longest wavelength, while gamma rays have the highest frequency and shortest wavelength.
Radio waves are used for communication, such as radio and television broadcasts. Microwaves are used in cooking and radar systems. Infrared radiation is responsible for the heat we feel from the sun and is used in night vision technology. Visible light allows us to see and is made up of different colors, each with a different wavelength. Ultraviolet radiation comes from the sun and can cause skin damage. X-rays are used for medical imaging, and gamma rays are highly energetic and can penetrate substances.
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All of the following devices are used to create an open circuit EXCEPT a:
fuse
battery
circuit breaker
switch
Answer:
I think its a fuse because everything else makes sense and is used in electrical circuits and the fuse is the only one that stands out to me ¯\_(ツ)_/¯
Noise cancelling headphones eliminate outside noise by combining the original sound wave with a wave produced when the original sound wave is inverted. Explain how this cancels out the wave. You must use the terms interference and superposition your response.
Answer:
By superposition of two waves that are out of phase.
Explanation:
Sound waves can be , in fact, are thought of as waves which mean they have troughs and crests as in any wave. so as it is a fact that two waves that are out of phase, that means trough of one as at the crest of another, will cancel each other when combined or super-imposed.
trough in any wave is point of minimum amplitude and crest is point of maximum amplitude.
In noise cancelling headphones if outer noise is super imposed with a nother sound eminated inside headphones that is completly out of phase then the noise will get cancelled.
here inverted refers to original sound being out of phase.
Answer:
To reduce or cancel out noise, research has shown that superimposing a sound wave and and the wave produced when the sound wave is inverted, cancels the sound by creating a destructive interference of the two waves. Destructive interference occurs when the troughs of the sound wave superimposes with the crest of the inverted wave canceling out the sound wave. This research shows great potential in the automobile industry for canceling out noise fro mthe exhaust vent.
Question 6 (1 point)
Which fundamental force has not been successfully united with the others in a
particle accelerator?
- weak nuclear force
- electromagnetism
- strong nuclear force
- gravity
Answer:gravity
Explanation:
i just took the test and it was right!
Gravity is the fundamental force that has not been successfully united with the other forces in a particle accelerator; the others have been unified into the Standard Model of Physics. The correct option is gravity.
The fundamental force that has not been successfully united with the others in a particle accelerator is gravity. While the weak nuclear force, electromagnetism, and strong nuclear force are unified into a Standard Model of Physics, gravity, described by General Relativity, has so far eluded integration into this framework.
Attempts to create a theory that unifies gravity with the other forces are referred to as a 'theory of everything'. The electromagnetic and weak nuclear forces have already been unified into the electroweak force, and physicists have considered the possibility of a grand unified theory that would also include the strong nuclear force.
However, gravity remains separate due to its unique properties and the fact that it is a long-range force mediated by hypothetical particles called gravitons, which, unlike the particles associated with the other forces, have not been observed.
Can you please answer this question?
The pressure graph that matches the simulation shown above is Graph C
What is the graph?The simulation shows a longitudinal wave traveling from left to right. The pressure graph of a longitudinal wave shows regions of high pressure (compression) and low pressure (rarefaction).
So, Graph C shows a region of high pressure followed by a region of low pressure, which matches the simulation. Graph A shows a region of low pressure followed by a region of high pressure, which is the opposite of what is shown in the simulation. Graph B shows two regions of high pressure separated by a region of low pressure. This does not match the simulation , which shows only one region of high pressure.
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Carrie has the following assets and liabilities. What is her net worth?
Assets
car - $3,500
savings - $1,000
cash - $80
earnings - $120
Liabilities
car loan - $3,000
credit card - $500
$12,000
$1,200
$500
$8,200
Answer:
Carrie’s net worth is -20700
Explanation:
Net Worth = Total Assets - Total Liabilities
Total Assets = $3500 + $1000 + $80 + $120 = $4700
Total Liabilities = $3000 + $500 + $12000 + $1200 + $500 + $8200 = $25400
$4700 - $25400 = -20700
So, her Net worth is -20700, in other words, her liabilities are greater than her assets
Carrie's net worth is calculated by subtracting her total liabilities ($22,200) from her total assets ($4,700). This results in a net worth of -$17,500.
Explanation:To determine Carrie's net worth, we first add up all her assets. This includes her car ($3,500), savings ($1,000), cash ($80), and earnings ($120), which adds up to a total of $4,700. We then add up her liabilities, which include her car loan ($3,000), credit card debt ($500), and the additional liabilities listed which total $22,200. Subtracting the total liabilities from the total assets ($4,700-$22,200), we find that Carrie's net worth is -$17,500.
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Which best summarizes the results of Mendel’s pea plant experiments?
Gregor Mendel's experiments with pea plants led to the discovery of heredity's basic principles, the consistent 3:1 ratio in second-generation offspring, and the independent assortment of genes.
Summary of Mendel's Pea Plant Experiments
Gregor Mendel's groundbreaking experiments with pea plants established the basic principles of heredity and genetics. Mendel meticulously recorded the inheritance patterns of seven distinct pea plant traits, including flower color, and discovered that traits are passed on to offspring in a predictable manner. The key findings were:
True-breeding plants, when self-fertilized, consistently produce offspring with identical traits.
Offspring resulting from crosses between different true-breeding plants showed a dominant phenotype in the first generation (F₁).
In the second generation (F₂), a 3:1 ratio of the dominant to recessive phenotypes was observed, revealing the discrete and independent assortment of genes.
These results led to the formulation of Mendel's laws of segregation and independent assortment, which explain how traits are inherited separately from each other.
What is the theory of plate tectonics?
Answer:
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
Explanation:
3. Ms. Johnson can bench press 150 kg from 0.7 m from the ground to 1.5 m above the ground. a. How much weight (not mass) did Ms. Johnson lift? Put down Givens, Solving For, Equation, Substitution, Answer with Units
b. How much power did she use if she lifts the weights in 10s? Put down Givens, Solving For, Equation, Substitution, Answer with Units
Explanation:
a. Given:
m = 150 kg
a = 9.8 m/s²
Solving for: F
Equation: F = ma
Substitution: F = (150 kg) (9.8 m/s²)
Answer: F = 1470 N
b. Given:
y₀ = 0.7 m
y = 1.5 m
F = 1470 N
t = 10 s
Solving for: P
Equation: P = F Δy / Δt
Substitution: P = (1470 N) (1.5 m − 0.7 m) / 10 s
Answer: P = 117.6 W
Ms. Johnson lifted 1470 Newtons of weight and used 773.5 Watts of power.
Explanation:Given:
Mass lifted (weight) = 150 kgInitial position = 0.7 mFinal position = 1.5 ma. The weight lifted by Ms. Johnson can be found by multiplying the mass lifted by the acceleration due to gravity:
Weight = mass * acceleration due to gravity
Weight = 150 kg * 9.8 m/s^2
Weight = 1470 N
Ms. Johnson lifted 1470 Newtons of weight.
b. Power can be calculated using the formula:
Power = Work / Time
Work = Weight * distance
Power = (Weight * distance) / time
Power = (1470 N * (1.5 m - 0.7 m)) / 10 s
Power = 773.5 Watts
Ms. Johnson used 773.5 Watts of power.
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5. When the students discovered it, did they find a solid, a liquid, or a gas? Explain your
reasoning
Answer:
The students must have found Boron as a solid.
Explanation:
Boron is a group 3 element that is known to be in its solid state at room temperature.
Infact, the melting point of Boron is known to be very high (2076°C) and its boiling point, even higher (3927°C).
So, it is logical that the temperature the students work with is within the range below 2076°C and hence, will have Boron in its solid state.
Note that Boron is a group 3 element, a metalloid (properties between a metal and a non-metal) with very high melting and boiling points.
Hence, it is easy to see why the Boron discovered has to be in its solid form.
Hope this Helps!!!
If the frequency of an electromagnetic wave is increased, what happens to the
energy?
Answer:
Electromagnetic waves can bring energy into a system by virtue of their electric and magnetic fields. ... If the frequency of the electromagnetic wave is the same as the natural frequencies of the system (such as microwaves at the resonant frequency of water molecules), the transfer of energy is much more efficient.
Answer:As a wave's wavelength increases, the frequency decreases, and as wave's wavelength decreases, the frequency increases. When electromagnetic energy is released as the energy level increases, the wavelength decreases and frequency decreases.
Explanation:
google lol
A child picks up a tennis ball tied to the end of a rope. He swings the rope around, over his head, in a circle. Once the ball is spinning, he lets go of the string and the ball goes flying. Explain which of the following images correctly shows which way the ball will fly and why.
Answer:
Plan A
Explanation:
Acceleration in a circle is toward the center of the circle, while velocity is always a straight line that's tangent to the circle. When the boy let's go of the rope the Acceleration toward the center of the circle disappears. The v ball then follows the straight path, tangent to the circle.
How does a savanna differ from a grassland?
a. Savannas have a large number of grazing animals, while grasslands do not.
b. Savannas have shrubs and isolated trees, while grasslands contain grasses, flo
c. Grasslands have burrowing animals, while savannas do not.
d. Savannas are regulated by fires, while grasslands are not.
Please select the best answer from the choices provided
O
A
Answer:
B. Savannas have shrubs and isolated trees, while grasslands contain grasses.
Answer:
I pretty sure the answer is B.
Explanation:
What is the frequency of a wave that has a velocity of 10 m/s and a 5m wavelength?
50 Hz
0.5 Hz
5 HZ
2 Hz
15Hz
Answer:
2Hz
Explanation:
this is a correct answer.
How does the direction of vibration of a longitudinal wave compare to its direction of motion?
Answer:
parallel
Explanation:
vibration of particles is parallel to the direction of the wave
Final answer:
In a longitudinal wave, the direction of vibration is parallel to the wave's direction of motion, unlike in transverse waves where the vibration is perpendicular.
Explanation:
The direction of vibration in a longitudinal wave is parallel to its direction of motion. This is in contrast to transverse waves, where particles in the medium move perpendicular to the wave's direction of propagation. In a longitudinal wave, such as a sound wave, the particles of the medium oscillate back and forth along the same direction the wave is moving. An analogy to visualize a longitudinal wave is compressing and stretching a slinky along its length, causing disturbances that move along the spring in the same direction as the compression and stretching.
A short ramp and a long ramp each reach a height of 1 m. Which
ramp has a greater mechanical advantage?
Answer:
he longer ramp has more mechanical advantage for it requires less force to push up a mass while being over a longer period of time. Its called Mechanical Advantage because say you had to lift a car up 1-meter. you cannot simply pick it up, but over a long enough slope you would be able to because you can apply a small force over a longer distance
Explanation:
There is a short ramp and a long ramp both have a height of 1 meter. So, the greater mechanical advantage is with the long ramp.
What is Momentum?Momentum is created by multiplying a particle's mass by its speed. It is a vector quantity. The temporal rate of change in momentum is equal to the force applied to the particle, according to Isaac Newton's second law of motion.
The impulse, which is the product of the force and the time interval (the impulse), is equal to the change in momentum, according to Newton's second law, if a constant force operates on a particle for a specified amount of time. The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.
The longer ramp provides a greater mechanical advantage since it can lift a mass over a greater distance with less effort. Say you had to raise a car up a meter, that's why it's termed the "Mechanical Advantage." Although you cannot just pick it up, if the slope were long enough, you might be able to do it since a tiny force could be applied over a greater distance.
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How does convection occur in the troposphere
Answer:Convection occurs in the troposphere due to differences in temperature and density of air. The troposphere is the lower layer of the Earth's atmosphere and extends from the Earth's surface up to an altitude of about 7 to 20 kilometers, depending on the latitude.
Convection currents are driven by the transfer of heat from warm air to cool air. When the air is heated, it becomes less dense and rises. As it rises, it cools and sinks, creating a circulation of air that is called a convection cell.
In the troposphere, convection occurs in response to several factors such as:
Solar heating: The sun heats the Earth's surface, which in turn heats the air above it. This causes warm air to rise and cool air to sink, creating a convection current.
Land and sea breezes: During the day, the land is heated more than the sea. This causes the air above the land to rise, creating a sea breeze. At night, the opposite happens and a land breeze is created.
Thunderstorms: Convection is a key factor in the development of thunderstorms. As warm, moist air rises, it cools and condenses into clouds. This creates an upward force that drives the storm.
Convection in the troposphere plays a significant role in shaping the Earth's weather patterns and distributing heat from the equator to the poles.
Explanation:
Final answer:
Convection in the troposphere is caused by warm, less dense air rising and cooler, denser air descending, forming convection currents that are key to weather systems, cloud formation, and precipitation. This is further intensified by phase changes, such as when evaporated water condenses into clouds, releasing heat and reinforcing the process through positive feedback, driving powerful weather phenomena.
Explanation:
Convection in the troposphere occurs as the Earth's surface is heated unevenly by solar radiation, creating differences in air temperature. Warm air becomes less dense and rises, while cooler, denser air descends to take its place, forming convection currents. These currents are a fundamental component of weather systems, including the formation of clouds and precipitation. The process is enhanced by various mechanisms, such as albedo effects where certain surfaces reflect more solar energy, leading to localized heating.
Another significant aspect of convection is the phase change associated with water vapor. When water evaporates from the Earth's surface, it removes heat from the oceans. As this water vapor rises and condenses into clouds, it releases latent heat into the atmosphere, contributing to the buoyancy of air masses and driving powerful weather systems like thunderstorms and hurricanes. This cyclic process is an example of a positive feedback mechanism, where the process self-reinforces and escalates, leading to more intense convective activity.
Additionally, large-scale phenomena such as convergent uplift in the Intertropical Convergence Zone (ITCZ) also contribute to the rising motions, where the convergence of trade winds induces significant rainfall and thunderstorms.
if a current flowing through a lightbulb is 0.75 ampere and the voltage differences across the lightbulb is 120 volts how much resistance does the lightbulb have
Pls Help i’ll give u a brainlest
The circuit is working, and all three bulbs are lit. If a switch at A is opened,
what will happen to the circuit?
A
B
Cc
O
A. Bulbs 1 and 2 will go out, but bulb 3 will remain lit.
O
B. Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
O
c. All three bulbs will stay lit.
O
D. All three bulbs will go out
If a switch at A is opened, Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
What is parallel and series combination?Parallel combination : When two or more resistances are connected between the same two points, they are said to be connected in parallel combination. In parallel combination , current get divided and voltage across the circuit remains same .
In a series combination the electric components are connected end to end along a same line . In series combination current remain same in whole circuit but voltage get divided.
It can be observed from the diagram that all three bulbs are connected in parallel combination not in series , hence current will divide in each branch and voltage remain same across each bulb . Current will flow in each branch except in the branch where bulb 1 is connected because switch A is open . Since, in branches where bulb 2 and 3 are connected current is flowing and circuit is complete , both the bulbs will glow except bulb 1.
correct option will be : B) Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
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A major-league pitcher throws a baseball toward home plate. The ball rotates at 1560 rpm, and it travels the 18.5 meters to the plate at an average translational speed of 40.2 m/s. How many revolutions does the ball make during this trip?
Final answer:
The ball makes approximately 11.934 revolutions during its trip to home plate.
Explanation:
To find the number of revolutions the ball makes during its trip, we first need to calculate the time it takes for the ball to travel 18.5 meters to the plate. We can use the formula: time = distance/speed. In this case, the time is 18.5 / 40.2 = 0.459 seconds.
Next, we need to convert the rotational speed from rpm to revolutions per second. There are 60 seconds in a minute, so the rotational speed is 1560 / 60 = 26 revolutions per second.
Finally, we can calculate the number of revolutions the ball makes during its trip by multiplying the rotational speed by the time: 26 × 0.459 = 11.934 revolutions.
Therefore, the ball makes approximately 11.934 revolutions during its trip to home plate.
The ball makes 11 complete revolutions during its 18.5-meter trip to home plate.
To determine how many revolutions the baseball makes during its trip to the home plate, we need to follow these steps:
1) First, determine the time it takes for the baseball to travel the 18.5 meters to home plate.
Given the baseball's average translational speed is 40.2 m/s, we can calculate the time using the formula:Time = Distance / SpeedTime = 18.5 m / 40.2 m/s ≈ 0.460 seconds2) Next, convert the rotational speed from revolutions per minute (rpm) to revolutions per second (rps).
Rotational Speed (rps) = (Rotational Speed (rpm)) / 60Rotational Speed = 1560 rpm / 60 ≈ 26 revolutions per second3) Finally, calculate the number of revolutions made by the baseball during its trip using the time determined earlier.
Number of Revolutions = Rotational Speed (rps) * Time (s)Number of Revolutions ≈ 26 rps * 0.460 s ≈ 11.96 revolutionsSo, the baseball makes 11 complete revolutions (considering the 12th revolution as incomplete) during its trip to home plate.
SOMEONE HELP
Describing Electromagnets
Warm-Up
Fill in the terms that complete the statement.
An electromagnet is a
with a
core.
Electromagnet is a solenoid with a metal core.
To find the answer, we need to know about electromagnet.
What is electromagnet?Electromagnet is a temporary magnet.It's produced when current flows through a solenoid and remained functioning until the current flows.What does the electromagnet consist?It consists of a solenoid with a metal core which becomes magnetized when current flows through the loops of the solenoid.
Thus, we can conclude that an electromagnet is a solenoid with a metal core.
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____ is a measure of electric potential energy
ampere
coulomb
ohm
volt
Answer:
Ampere
Explanation:
Edg2021
When You lift a load, the resistance force is
Answer:
gravity
Explanation:
as u are lifting the road gravity will act on it
Answer:
Gravity
Gravity pulls down as you put you pull up
the more heavier the object is, the more it's attached to the ground.
You're driving down the road at 30 m/s when you see an ambulance approaching you from behind. If you measure the peak frequency of its siren to be 320 Hz when it's behind you and 300 Hz after it's passed you, how fast is the ambulance driving? Assume the speed of sound in air to be 340 m/s
Answer:
39.45 m/s
Explanation:
This phenomenon is known as Doppler Effect, and it occurs when there is a source of a wave in motion with respect to an observer. In such situation, the frequency of the wave as perceived by the observer is shifted with respect to the real frequency.
In particular:
- The observed frequency is higher if the source is moving towards the observer
- The observed frequency is lower if the source is moving away from the observer
The formula to calculate the apparent frequency in the Doppler Effect is:
[tex]f'=\frac{v \pm v_o}{v\pm v_s}f[/tex]
where
f is the real frequency
f' is the observed frequency
v is the speed of the wave
[tex]v_s[/tex] is the velocity of the source, which is positive if the source is moving away, negative if it is moving towards the observer
[tex]v_o[/tex] is the velocity of the observer, which is negative if the observer is moving away, positive if it is moving towards the source
In this problem:
v = 340 m/s is the speed of sound
- When the ambulance is approaching you from behind,
f' = 320 Hz
[tex]v_o=-30 m/s[/tex] (car is moving away from ambulance)
So
[tex]320 = \frac{340-30}{340 -v_s}f[/tex] (1)
- When the ambulance overcomes you and moves away from you,
f' = 300 Hz
[tex]v_o=+30 m/s[/tex] (car is moving towards ambulance)
So
[tex]300 = \frac{340+30}{340 +v_s}f[/tex] (2)
Re-arranging both equations (1) and (2),
1)
[tex]320 = \frac{310}{340 -v_s}f\\320(340-v_s)=310f\\108,800-320v_s = 310 f[/tex]
2)
[tex]300 = \frac{370}{340 +v_s}f\\300(340+v_s)=370f\\102,000+300v_s = 370f[/tex]
Both equations can be rewritten as
[tex]f=\frac{108,000-320v_s}{310}\\f=\frac{102,000+300v_s}{370}[/tex]
And by equating them we find:
[tex]\frac{108,000-320v_s}{310}=\frac{102,000+300v_s}{370}\\37(10,800-32v_s)=31(10,200+30v_s)\\399,600-1184v_s=316,200+930v_s\\83,400=2114v_s\\v_s=\frac{83400}{2114}=39.45 m/s[/tex]
Calculate the power of a car that does 50,000 J of work in 7s during a race
How do newton's laws relate to speed, velocity and acceleration?
Answer:
Explanation:
first law- an object at rest will stay ay rest, an object in motion will stay in motion
second law- acceleration is directly proportional to the net force A=F/M
third law-for every action force there is a reaction force equal in strength and opposite direction
hope this helps
HELP!!!!!!!Answer the following questions:
What was Galileo Galilei contribution to Science?
Where did he attend college or university?
Which branch of Science did he study?
Was he ever awarded the Noble Peace Prize or any other awards.
Describe the theory behind his invention
What uses does his invention have today has there been any developments since he invented his invention.
State 3 other facts about Galileo Galilei
Answer:
He went to the University of Pisa at 16. He discovered the four most massive moons of Jupiter, now known as the Galilean moons.
Explanation: