Physics High School
The statement that best describes electrons is that they are negative subatomic particles and are found surrounding the nucleus.
A rocket achieves lift off due to ______. a. inertia
c. centripetal forces
b. action and reaction forces
d. the doppler effect
B. Action and reaction forces
Newton's third law of motion, which states that action and reaction forces are equal and opposite, makes a rocket achieve lift off.
When the engine of a rocket burns fuel, the rocket experiences a thrust (a push) on the front that pushes it upwards. This thrust causes an equal and opposite push on the exhaust gas of the rocket downwards. The burning of the fuel is the action, the thrust, and it causes the rocket to move upwards. The push back on the exhaust gas is the reaction caused by the weight of the rocket.
For the rocket to lift off, the thrust must be greater than the weight of the rocket.
B.) Action and reaction forces helps during lift off of a rocket.
Hope this helps!
Since the bullets also have zero velocity, a more exact description of the bullet's state would be ______________. static equilibrium dynamic equilibrium elastic collision inelastic collision
Answer : The bullets have zero velocity, then bullets's state would be static equilibrium.
Explanation : The bullets have zero velocity.
So, we can say the the bullet's state would be static equilibrium. because the bullet have zero velocity that means bullet is not accelerate .
Hence, no force will exert.
Static equilibrium is a kind of equilibrium which occurs when an object is at rest.
Hope this helps!
How does the tilt of the earth affect climate?
Earth's TiltIs the Reason for the Seasons! During the year, the seasons change depending on the amount of sunlight reaching theEarthas it revolves around the Sun. The seasons are caused as theEarth,tiltedon its axis, travels in a loop around the Sun each year.
Earth's Tilt Is the Reason for the Seasons! During the year, the seasons change depending on the amount of sunlight reaching theEarth as it revolves around the Sun. The seasons are caused as theEarth, tilted on its axis, travels in a loop around the Sun each year.
How does an ocean wave transfer energy across the ocean?
The energy travels in a disturbance, in an ocean that disturbance is a wave, so the wave makes energy and moves it through the water
Reducing access to waterways will lead to an increase in human impact on waterways. T/F
A waterway refers to a water body that can be used for the transportation by human population. These includes rives, oceans, lakes, estuary and canals. A waterway should be wide and deep enough to allow the movement of water transportation vehicles like boats and ships. Water transportation is responsible for contaminating the water of waterways. As, the water transportation vehicles releases residues of fuel in the water, which deteriorate the quality of water and makes it unfit for survival of aquatic animal and plant species.
Hence, excess to waterways should be reduced in order to prevent water pollution. Reducing access to waterways will lead to decrease in human impact on waterways.
Therefore, the statement reducing access to waterways will lead to an increase in human impact on waterways is false.
The answer is false. It will decrease human impact due to access being reduced. It sounds like a trick question, but it's not. It is very straight forward. False is your answer young padawan.
Moving water, like that of a river, carries sediment as it moves along its bed. The faster the water flows, the more sediment that is carried and the larger the sediment particles. As the river slows down, the heavier particles of the load will settle out. How can you explain the particle movement based on Newton's laws of motion?
To understand the solution we must know about Newton's laws of motion.
What are Newton's laws of motion?Newton's First law of motion (or the law of inertia)
If a particle is in motion it will be in motion and if an object is at rest then it will be at rest until and unless an external force is acting upon the system.
Newton's Second law of motion, F = ma
The force is the product of the mass of the object and the acceleration of the object.
Newton's Third law of motion,
When two bodies interact then the force applied by them on each other is equal in magnitude and opposite in direction.
Why does the sediment in river water move?
When the water is moving at a high speed it exerts more force on the sediments in the larger sediment therefore, it's easier to move the larger sediment particles as the force by the river water is strong enough to encounter the inertia and the gravitational force.
In the opposite case, when the river slows down, the larger sediment of the load will settle out because of the reduced force. the force applied by the river water is not enough to move the particle (or encounter the inertia and the gravitational force).
Learn more about Newton's laws of motion:
Well newton's law is esstenaily how gravity works. so the force in this case water moves, the more the object (sediment) will go farther. And when the force is lessened the object will eventually come to a dead stop.
What is a peer review
When your peer reviews your work before the teacher does..it is more so all the students can understand the different perspectives of an assignment.
When your fellow peers review your work
Olivia wants to find out whether a substance will fluoresce. She says she should put it in a microwave oven. Do you agree with her? Why or why not?
Answer: Hello there!
While some substances will show fluorescence when putting inside a microwave, there are some other substances that will react under other situations, for example, some of them may react to UV light or X-rays.
So she may find that the substance is fluorescent by putting it in the microwave, but if the substance does not react, this doesn't mean that the substance is not fluorescent.
Olivia wants to find out whether a substance will fluoresce, I do not agree with putting it in a microwave oven as it might cause an explosion.
What is fluoresce?
Fluoresce is simply defined as the absorption of radiation at a wavelength followed by almost instantaneous radiation at a different wavelength.
In conclusion, microwaves react with metallic substances to cause explosions.
Read more about Wave
What are three ways in which people use microwaves
The three uses of the microwaves are given below.
- Medical Uses
Uses of Microwaves
Most wireless transmission systems are based on microwave technology. They are suitable for transmitting signals over long distances. Microwaves are used as a medium for transmitting information between mobile devices.
One of the most important uses of microwaves in the routine life of human beings is in microwave ovens. When you place food inside the chamber, microwaves bounce around the oven and heat the food through radiation.
- Medical Uses
Microwaves cause heating. This property has been harnessed to create targeted dielectric thermal desiccation of human tissue. This process is referred to as microwave ablation. Microwaves are also used in cancer treatments.
To know more about microwaves, follow the link given below.
2.) Cancer Treatment
Microwaves are a type of electromagnetic radiations, like radio waves, X-rays, Gamma Rays, ultraviolet radiation. Microwaves has a wide range of applications. It has frequency range 1GHz to 300GHz and has smaller wavelengths. As microwaves do not bend by any obstacles coming in their path, So, it can be used in radar. In cancer treatment, it is used to increase the temperature of tumor cells by high-power microwaves, results in turns cell membrane damage, which in results destruction of cancer cells. In cooking, microwave heat food like the sun rays your face i.e by means of radiation. It increases the energy of molecules inside food, which results in cooking or heating the food.
Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decrease the same type of friction
If the type of friction is sliding friction, it may be increased by increasing the roughness of the surface and may be decreased by smoothing the surface or applying a lubricant.
As we know that friction force is a contact force which opposes the relative motion between two surfaces in contact.
So here we can change the force between two surface when they move relative to each other.
Here when Lubrication is used between two surface then the relative motion of two planes becomes easy. So by lubrication of the surface either by oil or by smoothing the plane we can say that friction force will be reduced.
Also friction force depends on the effective contact points between two surfaces. So as we increase the contact points between two surfaces then the effective frictional force will increase.
Also we know that friction force is given by
now as we increase the normal force between two contact planes either by increasing the weight or by applying normal external force we can say that friction force will increase.
A 2700 Ohm resistor and electric circuit draws a current of 2.4 Milliamperes the total charge that passes through the resistor in 15 seconds is
The total charge (Q) that passes through the resistor in 15 seconds is 3.6 × 10⁻² Coulombs
The total charge (Q) inside an electric circuit is the total electrical current energy stored in the circuit per the dissipated energy in one period of time.
The total charge (Q) can be expressed by using the relation:
- Q = It
From the parameters given:
- Q = 2.4 milliamperes × 15 seconds
- Q = 0.0024 amperes × 15 seconds
- Q = 3.6 × 10⁻² Coulombs
Learn more about the total charge (Q) in an electric circuit here:
3.6 x 10^-2 C
I is equal to change in q over t. So, q is equal to It, We know I and t. Multiply them to get 3.6 x 10^-2
Which of the following objects has the most kinetic energy? a car going 60 miles per hour
a spring that is compressed
a rock sitting on the edge of a cliff
a bicycle going 10 miles per hour
The car going at 60 mph will have the maximum kinetic energy.
What is Kinetic energy?
The energy possessed by a body by virtue of its motion is called kinetic energy of the body. Mathematically, we can write kinetic energy as -
E[K] = 1/2mv²
Given are the examples which we come across in our day to day life.
Now, the rock sitting on the edge of a clip and the compressed spring will have potential energy in the form of gravitational and elastic potential energy. Now, the kinetic energy of a body is directly proportional to the square of the velocity. Thus, for a car with velocity of 60 mph will have more kinetic energy than the bicycle with 10 mph. So, the object with maximum kinetic energy will be of the car going at 60 miles per hour.
Therefore, the car going at 60 mph will have the maximum kinetic energy.
To solve more questions on Kinetic energy, visit the link below-
The answer is A. I just had that question.
Hope this helps!
What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second
Kinetic energyis theenergyof motion. An object that has motion - whether it is vertical or horizontal motion - haskinetic energy. It is calculated by the expression:
KE = 0.5mv^2
where m is the mass and v is velocity.
KE = 0.5(55)(9)^2
KE = 2227.5 J
Hope this answers the question. Have a nice day.
A man has a mass of 66kg on earth. what is his weight?
So 1 kg = 2.2 pounds.
66kg | 2.2 pounds
I set it up like this. The 66 kg crosses out with the 1kg. So you multiply the top 66 x 2.2 = 145.2 pounds
An object moving at 30 m/s takes 5s to come to a stop. what is the object's acceleration? A. 30 m/s ^2
B. -30 m/s ^2
C. -6 m/s ^2
D. 6 m/s ^2
Use SUVAT where:
S = distance
U = initial velocity = 30m/s
V = end velocity = 0 m/s
A = acceleration = ?
T = time = 5 secs
then pick out the equation v = u + at
0 = 30 + 5a
-30 / 5 = a
a = -6 m/s^2
The plane flight covers 400 miles in the first hour. As you approach the landing site, it takes you an hour to cover the last 200 miles. This is an example of (2 points) positive acceleration. velocity. instantaneous speed. negative acceleration.
Acceleration is defined as the rate of change in velocity to the time taken.
Acceleration is positive if the final velocity is ore than the initial velocity.
Acceleration is negative if the final velocity is less than the initial velocity.
Here, the velocity of plane is decreasing because it is landing, so the acceleration is negative.
Miles per hour is velocity so I agree with you. Without seeing any associated question, though, it's hard to say. If the question is, find the average velocity, then velocity is correct. But since change in velocity is negative, that is also negative acceleration.
What change of state occurs when wet clothing on a washing line dries out?
It is connected with vapour pressure, which is determined by the amount of water in the atmosphere and humidity.
When the air is 100% saturated with water vapour there will be a dynamic equilibrium where as much water condenses out of the air onto the clothes, as evaporates from the clothes into the air. If humidity is less than 100%, then there will be more evaporation than condensation and the clothes will become drier.
If the humidity is very low, either because the air is hot and can hold more water, or because there is just very little moisture in it, then the evaporation will proceed more quickly. If there is a wind this will speed the drying up because 'fresh' air, with low humidity is constantly passing over the clothes.
How are metal bridges built to cope with changes of temperature?
As the metal expands as does the road bed so neither really effevts those foing over the bridge. as it is hot the metal will expand and so will most tarmac on roads.
Which type of force can cause objects to attract or repel each other? a. frictional force
b. nuclear force
c. electrical force
d. gravitational force
C. electrical force
Like charges repel each other while different charges attract each other.
Yes the answer is C. At least that's what I've looked up
Which state of matter is the most common state in the universe? a. solid
"Plasma state of matter"is the most common state in the universe
Hope this helps!
Plasmas are the most common state of matter in the universe. They are even common here onearth. A plasma is a gas that has been energized to the point that some of the electrons break free from, but travel with, their nucleus.
Which statement best describes electrons? They are negative subatomic particles and are found surrounding the nucleus.Which statement describes an electron in an atom? ›
Which statement describes the charge and location of an electron in an atom? An electron has a positive charge and is located outside the nucleus.What is the best way to describe where electrons are in an atom? ›
The electrons in an atom are arranged in shells that surround the nucleus, with each successive shell being farther from the nucleus. Electron shells consist of one or more subshells, and subshells consist of one or more atomic orbitals.What describes where electrons are found? ›
Where Are Electrons? Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus. Because opposite electric charges attract each other, negative electrons are attracted to the positive nucleus.What is a description of electrons? ›
(ee-LEK-tron) A small particle with a negative charge that is found in all atoms. Streams of electrons made by special equipment can be used for radiation treatment.What describes the charge of an electron? ›
Electrons have an electric charge of -1, which is equal but opposite to the charge of proton, which is +1. All atoms have the same number of electrons as protons, so the positive and negative charges “cancel out,” making atoms electrically neutral.What is an electron quizlet? ›
Electron. a negatively charged subatomic particle that is found in the space outside. the nucleus of an atom.How electrons are in an atom? ›
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).Do electrons have energy? ›
There is also a maximum energy that each electron can have and still be part of its atom. Beyond that energy, the electron is no longer bound to the nucleus of the atom and it is considered to be ionized. When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state.What is the best way to describe a atom? ›
The smallest part of a substance that cannot be broken down chemically. Each atom has a nucleus (center) made up of protons (positive particles) and neutrons (particles with no charge). Electrons (negative particles) move around the nucleus.
Electrons are negatively charged particles that orbit around the outside of the nucleus. They spin so fast that it can be difficult for scientists to observe them. They are attracted to the positive charge of the protons and are the smallest particles in an atom - you can fit 2000 of them into a proton.How were electrons first described? ›
Summary. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup."What are electrons made of? ›
Protons and neutrons are made of quarks, but electrons aren't. As far as we can tell, quarks and electrons are fundamental particles, not built out of anything smaller.What is an example of an electron? ›
Electrons are the smallest of the particles that make up an atom, and they carry a negative charge. The number of protons and electrons is equal in a neutral atom. The hydrogen atom, for example, has just one electron and one proton. The uranium atom, on the other hand, has 92 protons, and therefore, 92 electrons.Where is the charge of electrons? ›
By convention, the charge of an electron is negative, −e, while that of a proton is positive, +e. Charged particles whose charges have the same sign repel one another, and particles whose charges have different signs attract.How many electrons are in one charge? ›
Therefore, the number of electrons in one coulomb of charge is 6 × 10 18 electrons .What happens in electron? ›
Electrons spin and rotate around the outside of the nucleus. As the electrons circle the nucleus they travel at certain energy levels but can "jump" between different energy levels if they gain or lose energy.What is electron in one word? ›
electron. noun. elec·tron i-ˈlek-ˌträn. : an elementary particle that has a negative charge of electricity and travels around the nucleus of an atom.What energy is electron? ›
An electron orbiting a nucleus is electrically attracted to the nucleus; it's always being pulled closer. But the electron also has kinetic energy, which works to send the electron flying away.Are electrons negatively charged? ›
Electrons are negatively charged subatomic particles found in the outermost regions of atoms. They are considered to be both partially particle-like and partially wave-like, depending on the scenario, according to West Texas A&M University. Electrons are essentially the reason atoms can interact with other atoms.
This force is called electromotive force, EMF, or voltage (V). Sometimes it is convenient to think of EMF as electrical pressure. In other words, it is the force that makes electrons move in a certain direction within a conductor.Why do electrons move? ›
When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side.How were electrons created? ›
In the first moments after the Big Bang, the universe was extremely hot and dense. As the universe cooled, conditions became just right to give rise to the building blocks of matter – the quarks and electrons of which we are all made.How many electrons are in each shell? ›
Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.What is free electron in chemistry? ›
The electrons that are not bound within the atom and free to move are called free electrons. As we know that the movement of electrons is the electric current. So, the free electrons tend to move freely and can conduct electricity. Metals are good conductors of electricity and thus they possess free electrons.What are atoms described as? ›
An atom is a complex arrangement of negatively charged electrons arranged in defined shells about a positively charged nucleus. This nucleus contains most of the atom's mass and is composed of protons and neutrons (except for common hydrogen which has only one proton). All atoms are roughly the same size.Do electrons mean more energy? ›
Electrons in energy level I (also called energy level K) have the least amount of energy. As you go farther from the nucleus, electrons at higher levels have more energy, and their energy increases by a fixed, discrete amount.Are electrons matter or energy? ›
Electrons are particles of matter that form the outer shells of atoms in the everyday objects around us.What are sentences about electrons? ›
The nucleus is charged positive and the electrons are charged negative, and there are the same number of electrons as there are positive charges on the nucleus.Which statement best describes the electrons in this illustration quizlet? ›
Which statement best describes the electrons in this illustration? The electrons are negatively charged particles located outside the nucleus.
Many fundamental, or subatomic, particles of matter have the property of electric charge. For example, electrons have negative charge and protons have positive charge, but neutrons have zero charge.What is the definition of electron quizlet? ›
Electron. a negatively charged subatomic particle that is found in the space outside. the nucleus of an atom.Which of the following statements best describes the electron transport? ›
Answer and Explanation: The statement that best describes an electron transfer chain is e. It transfers energy, stepwise, from one compound to another.What statement describes an electron that has emitted energy? ›
Answer and Explanation: The answer is A.) The electron emits energy and moves from a higher to lower n value. when an electron moves from a higher n value to a lower n value shell, its energy decreases and it emits energy in the form of light so as the energy remains conserved.Which best describes the mass of an electron? ›
The rest mass of the electron is 9.1093837015 × 10−31 kg, which is only 1/1,836the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron, and the electron mass is not included in calculating the mass number of an atom.Is an electron always positive? ›
An electron is a subatomic particle that is negatively charged. As opposite charges attract, negatively charged electrons are drawn to positively charged protons. Electrons are referred to as negative because of their behavior in an electric field.Are electrons always positively charged? ›
Electrons always carry a negative charge, while protons are always positively charged. Neutrons (true to their name) are neutral, they have no charge. Both electrons and protons carry the same amount of charge, just a different type.What makes electrons negative? ›
Electrons are called negative because of the way they behave in an electric field. In an electric field, an electron will move from the negative pole to the positive, by convention that makes it a negative charge.What are the characteristics of electron? ›
The electron is a low-mass, negatively charged particle. As such, it can easily be deflected by passing close to other electrons or the positive nucleus of an atom. The electron was the first fundamental particle that was discovered.