The Bohr model of the atom suggest that the protons and neutrons are found in the nucleus and the electrons orbit the nucleus much like planets around the sun. How is our modern model of the atom different from this model? A) Neutrons are not found in the nucleus. B) The nucleus is much larger than first thought. C) The electrons contain smaller parts called quarks. D) The electrons move around the nucleus in an electron cloud

Answer:

I think it is D

Explanation:

the Bohr model says that electrons whizz around the atomic nucleus in the same way that the earth goes around the sun - but rather than being bound by gravity, it is bound by electromagnetic forces.

Study the roller coaster diagram. Match the labels to the correct location on the roller coaster.

A:
B:
C:
D:

- Greatest Potential Energy
- Greatest Kinetic Energy
- Increasing Kinetic Energy
- Increasing Potential Energy

When you drop something, first of all it accelerates.
The faster it falls, the bigger the force of ______ that acts on it.
choose from the list to complete the sentence:
friction gravity air pressure

note: apparently the answer is friction but it doesn't make sense to me so please explain.

Which transition shows a compare and contrast relationship?(1 point)
Responses
i need answers now pls
in addition
in addition

similarly
similarly

accordingly
accordingly

to clarify

Which group was designed to study Saturn?
A. Cassini, Hubble, and Huygens
B. Huygens, Voyager 1, and Hubble
C. Voyager 1, Huygens, and Cassini
D. Voyager 1, Hubble, and Cassini

The gravity of Earth is attracting a person towards the center with 500N of gravitational force. The person is exerting a reactionary force on the Earth with how much force? Explain your thinking behind this.

Which effect is created when two sound waves that are close in pitch
interact?
O A. Echoes
O B. Loudness
C. Beats
O D. Intensity

Using the knowledge you have about electricity, what invention would you create to provide electricity for those third world countries who need it? Post a picture of your invention listing the significance. If you have a country specifically in mind this could help please list that country, as well.

Q1. Think up some examples of your own.
Write four more sentences, one
for each of the words 'push', 'pull', 'stretch' and 'turn'.
answer as a 7th grader, i need all answers.

the Conservation of Momentum states that the momentum of the system before the collision the momentum of the system after the collision

A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J

How high does Pete lift his sledge hammer if he used a force of 25N to lift the hammer while doing 50J of work?

What type of circuit is this in the picture? (Lesson 4.07)

A: Parallel
B: Open
C: Ac
D: Series

How do we know there has not been an increase in the number of earthquakes? Officials from the U.S. Geological Survey, the government agency that keeps track of earthquakes, point to statistics. On average, there have been no more earthquakes so far in 2010 than there were in previous years.

What Happens During Earthquakes?

In reality, it's not the number of quakes that has gained our attention, but the devastating impact quakes can have. Earthquakes are very natural—it's inevitable that they'll happen because of the way the planet works. The earth's surface is made up of tectonic plates that fit together like puzzle pieces and are always moving past each other. When two of the plates' edges get caught, stress builds up at the fault line—the crack between the plates. When the plates are finally able to break free of each other, the stress is released, and an earthquake occurs. Earthquakes of varying strengths happen every day, usually at fault lines. Some of these quakes have a high magnitude, while others are relatively weak. But it's often where an earthquake takes place that determines whether it will be something that goes largely unnoticed, or a disaster that affects thousands of people.

What Is Changing?

In the past, earthquakes were not as much of a problem because Earth's population was smaller, and cities were less populated.

"Look at some of the big [earthquakes] recently," said Debarati Guha-Sapir of the World Health Organization. Guha-Sapir cited some earthquakes that took place in areas where the population had increased in recent years, making the quakes more serious. "Had the Izmit or Bhuj quakes [of 1999 and 2001] happened 30 years ago, the events would have been relatively insignificant, as the [populations] of these cities were a third of what [they were when the earthquakes happened]. Increasing population density makes a small event into a big one."

Some of the earthquakes that took place in early 2010 occurred in highly populated areas, as well. More people are moving into megacities that happen to be built on fault lines—and many cities are on fault lines. Of the 130 cities with more than one million people, more than half are in earthquake zones, making them more prone to earthquakes.

In many of these cities, officials have drawn up laws requiring that buildings be designed and constructed to endure earthquakes. But some cities, particularly those in developing countries, lack the resources to do this. There, people are rapidly putting up substandard buildings that can't withstand the force of the shaking earth. For example, the Haiti earthquake took place near the nation's crowded capital. There was a great deal of destruction because there were "too many people crammed into a city that wasn't meant to have that many people and have an earthquake," said University of Miami geologist Tim Dixon.

Another reason quakes seem worse is that we're paying more attention. Everyone noticed when the Haiti earthquake was quickly followed by the Chile earthquake. Many people watched the news and the Internet for updates on these disasters, unable to believe that they were seeing two major earthquakes in such a short period of time. But eventually, the earth will have a period when earthquakes are minor or in unpopulated areas. Then people won't notice quite so much anymore.

"People are paying attention to the violent planet we've always lived in," said Dennis Mileti, a seismic researcher. "Come back [at a time when] there have been no [noticeable] earthquakes, [and] most people will have forgotten [about them] again."

According to the article, what is one reason why it seems as if the world is experiencing more earthquakes than usual?

Black to move and capture a hanging piece . Select the best move

A) Nxg3
B) Bxg3
C) Qxg5

Vector A→ has a magnitude of 8 units and makes an angle of 45° with the positive x-axis. Vector B→ also has a magnitude of 8 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A→ + B→ and (b) the vector difference A→ - B→

how does a free fall drop ride work with newtons 3rd law?

What two gases in the atmosphere do animals and plants need to breathe and grow?

Which of the following forces has not changed Earth's surface?

folding
erosion
weathering
gravity

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

A white blood cell that destroys pathogens by engulfing them and breaking them down is called please help


A Antigen


B B-cell


C Antibody


D Phagocyte

A student practicing for a track meet ran 263 m in 30 sec. What was her average speed?

Which of the following is NOT a reason density decreases as altitude increases?
A. There is less air pushing down from above so molecules can spread out
B. Gravity is weaker the farther you get from Earth's core
C. Living things have breathed in much of the air molecules so there are less in the atmosphere

A 1000 kg boulder sits at the top of a 50-meter high cliff. Determine the amount of potential energy possessed by the boulder if the acceleration due to gravity is 9.8 m/s2. The boulder has_______(magnitude/ number)_______(units) of Potential Energy.

Why do plates moves?


A.Convection currents in the Lithosphere move the plates.

B. Lithosphere plates move into a trench away from the ridge.

C. Lithosphere plates move away at a ridge.

D. Convection currents in the Mantle move the plates.

What would happen to the digestion process if enzymes were not present

GIVING BRAINLIEST TO THE MOST THOUGHTFUL ANSWER


ALSO:
MERRY CHRISTMAS! HAPPY HANUKKAH ALL THAT

The Chemical equation represents________reaction

Isaac Newton published his work on gravity in the Philosophiæ Naturalis Principia Mathematica (Latin for Mathematical Principles of Natural Philosophy) in July 1687. In 2-3 complete sentences, detail observations you can make today that would lead you to the same conclusions Newton came to about gravity.

Foliation occurs when minerals are flattened by heat and pressure. this results in a layered or banded texture. What type of rock do you think is foliated?

Which best describes a difference between energy transformations in power plants and dams?

Only power plants use fossil fuels to transform energy.
Only dams use fission to generate thermal energy.
Only power plants use water to turn turbines.
Only dams use mechanical energy to produce electricity.