Which of the following are major problems with fission reactors?

1.Maintaining high temperatures

2.Disposal of hot water

3.Disposing of radioactive waste

4.Obtaining fuel

Answer:

(3) 180 m

Explanation:

y = y₀ + vt − ½ at²

where y is the final height,

y₀ is the initial height,

v is the final velocity,

a is acceleration,

and t is time.

Given y₀ = 0 and a = -10.

y = vt + 5t²

At maximum height, v = 0:

y = 5t²

The ball reaches the same height at 4s and 8s, so the peak is in the middle at 6s.

y = 5(6)²

y = 180

The ball reaches a maximum height of 180 m.

Answer:

A. 30 m/s

D. 15 kilometers

Explanation:

Vector quantities have both magnitude and direction. Among the provided choices, B and C are scalar quantities as they have no direction.

30 m/s is the magnitude for velocity, a derivative of displacement.

15 kilometers is the metric magnitude (10³m) for displacement.

Answer:

The number of valence electrons increases to 8 or, the atom gives up loosely held valence electrons.

Explanation:

Please mark brainliest and have a great day!

Answer:

1 A

Explanation:

The total resistance  of a circit in series is the added amount of individual resistants which is 3+4+5=12 ohms

According to Ohms's law, V=IR

V=voltage

I=current

R=resistance

12=12I

I=1 A

The current flowing through the 12 ohm resistor is 1 ampere.

To find the current flowing through the 12 ohm resistor, we need to first find the equivalent resistance of the series combination of resistors.

The total resistance (Rtotal) is calculated by adding the individual resistances (R1, R2, R3) in the series combination:

Rtotal = R1 + R2 + R3

Substituting the given values:

Rtotal = 3 ohms + 4 ohms + 5 ohms = 12 ohms

Using Ohm's law, we can calculate the current (I) flowing through the 12 ohm resistor:

I = V / Rtotal

Substituting the given voltage (V = 12V):

I = 12V / 12 ohms = 1 ampere (A)

Therefore, the current flowing through the 12 ohm resistor is 1 ampere.

Answer:

Any medium solid, liquid or gas is required for sound waves to travel.

Explanation:

A sound wave requires a medium to travel. Sound waves are mechanical waves that is why these waves require a medium to travel. Sound waves can travel through solids, liquids, and gases.

In solids, the particles of the medium are closely packed together as compared to liquids and gases. In liquids, particles are less tightly packed and almost negligible in gases.

Therefore sound waves produce vibration in the dense or solid medium. Denser the medium faster the sound waves travel. However sound waves can not travel through empty space.

Answer:

the answer is B just took the test!!

Explanation:

Answer:

The fourth planet from the sun is Mars. There are 8 planets in our solar system. Its a source of debate of whether or not Pluto is a planet so there is 8 planets and not 9.

Explanation:

The fourth planet from the Sun is Mars.

Mars, commonly known as the "Red Planet," is known for its distinct reddish appearance, which is due to iron oxide, or rust, in its soil. Mars is smaller than Earth and has a thin atmosphere, which means it has lower surface pressure and cooler temperatures. Despite being colder and drier than Earth, Mars has some similarities with our planet, such as the presence of volcanoes.

In addition to its fascinating geological features, Mars has two small moons named Phobos and Deimos. It is also the only planet that has shown evidence of having water in the form of ice, particularly at its polar ice caps and possibly below its surface.

Answer

Softest mineral-Talc

Hardest mineral- Diamonds

Explaination

Talc is the softest mineral and has a value of 1.

Diamond, the hardest of all minerals, has a value of 10.

Answer:

Softest mineral-Talc

Hardest mineral- Diamonds

Explanation:

Answer:

About 250 billion stars are in the Milky-way Galaxy

Answer:

meters per second squared is the appropriate units for acceleration units.

Answer:

FORCE= MASS*ACCELERATION

Explanation:

By doing the experiments with track, toy car and some washers we can verify our first two Newton's laws.

When we run on a track or we run this car on the track, we need an external force to run the car and we again need an external force to stop that car. This verifies the law of inertia that a body do not want to change its mode.

And we will also verify that the amount of force applied on the body is directly proportional to the mass of the body and its acceleration.

A relevant scientific question for the experiment would be how Newton's first and second laws of motion affect the toy car's movement and the forces it experiences with varying additional masses (washers). Newton's first law, the law of inertia, dictates the car will remain at rest or continue at a constant speed unless an external force acts upon it. Newton's second law predicts the car's acceleration will be proportional to the force applied to it.

A scientific question for the experiment could be: 'How do Newton's first and second laws of motion affect the movement and forces acting on the toy car when varying amounts of washers (increased mass) are added?'

According to Newton's first law of motion, also known as the law of inertia, an object will remain at rest or continue moving at a constant speed in a straight line unless acted upon by an external force. This means the toy car should stay at rest until you apply a force to set it in motion.

Newton's second law says that the change of motion (acceleration) of a body is proportional to the force acting on it and happens in the direction of the force. Thus, when applying different weights (washers), you are applying different forces which should result in different accelerations of the toy car.

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Answer:

Your answer will be 6.0kg•m/s

Explanation:

In the given question all the required details d given. Using these information's a person can easily find the momentum of the object. In the question it is already given that the mass of the object is 5 kg and the velocity at which it is traveling is 1.2 m/s.We know the equation of finding momentum asMomentum = mass * velocity                   = 5 * 1.2                    = 6So the momentum of the object is 6 Newton.

Answer:

Momentum of an object, p = 6 kg-m/s

Explanation:

It is given that,

Mass of an object, m = 5 kg

Velocity of that object, v = 1.2 m/s

We need to find the momentum of an object. It is equal to the product of mass and its velocity. Mathematically, it is given by :

p = m v

[tex]p=5\ kg\times 1.2\ m/s[/tex]

p = 6 kg-m/s

So, the momentum of an object is 6 kg-m/s. Hence, this is the required solution.

Answer:

Most of the eastern United States is a TROPICAL RAINFOREST bione

Answer:

Explanation:

If you go from 60 km/hr or 60 mph and apply your brakes so that you go down to 20 mph or 20 km/hr that is a decrease in velocity. It means you have to slow down because your are in a school zone or a neighborhood zone.

Deceleration can be defined this way.

d = (vf - vi) / t

where vi is bigger than your final velocity. In this case you are slowing down.

Answer:

0.32 Hp is the answer. right

Answer: Power developed by her is 0.32 hp

Explanation:

Work done , W= Force(F) X Displacement (d) in the direction of force

Thus work done , [tex]W=Fd=110\times 4.0 ft-lbf = 440 ft-lbf[/tex]

Now 1.0 ft-lbf = 1.355 joules of energy

Therefore , work done, W= 440x 1.355 J = 596.2 J

Average Power , [tex]P=\frac{work done(W)}{time (t)}[/tex]

=> [tex]P=\frac{596.2}{2.5} watts = 238.5 watts[/tex]

We know 746 hp = 1.0 watts

=> [tex]P=\frac{238.5}{746} hp=0.32 hp[/tex]

Thus average power developed by her is 0.32 hp

Answer: the naswer is A. hope i helped

Final answer:

The main energy source for the Sun is the fusion of hydrogen into helium, a process that takes place at the core under extreme temperatures and pressures. This fusion releases vast amounts of energy much greater than energy from fission or chemical reactions. The transformation of mass into energy in the Sun's core is the key to its consistent and long-term energy output. So the correct option is B.

Explanation:

The main energy source for the Sun is the fusion of hydrogen into helium. This process occurs at the core of the Sun, where temperatures reach about 14 million kelvin. The net reaction of fusion in the Sun can be summarized as the transformation of four protons, or hydrogen nuclei (^1H), into one helium nucleus (^4He), releasing significant energy in the form of two positrons, two neutrinos, and gamma rays. The energy produced from this nuclear fusion is much greater than the energy from nuclear fission or chemical reactions such as the burning of fossil fuels.

The fusion process in the Sun involves a series of reactions known as the proton-proton cycle. The core's extreme temperature and pressure allow protons to overcome their natural repulsion and collide, fusing into deuterium (hydrogen with one neutron), and subsequently into helium. During this fusion, mass is converted into energy, as described by Einstein's famous equation E=mc^2. This makes the fusion process highly efficient in releasing energy.

The energy released from fusion diffuses slowly from the Sun's core to its surface, except for neutrinos that escape immediately. This slow process of energy diffusion and the escape of neutrinos contribute to the stable energy output of the Sun. It's a continuous process that supports the Sun's longevity as a source of heat and light for the solar system, manifesting as the sunlight we receive.

Answer:

The focal length of a lens is refers to the distance from the center of the lens to the principal foci.

Answer:

the answer is A) N2 + 3H2 → 2NH3

Explanation:

multiple reactants combine to form one product

option b is a single replacement

option c is a decomposition

options c is a double replacement

so the answer has to be A out of elimination anyway

Answer:The answer is B

Explanation:

Answer:

experiment

Explanation:

An organized procedure for testing a hypothesis that tests the effect of one thing on another under controlled conditions is called an experiment

Studying the effect of one thing on another in order to test a hypothesis is an experiment,

Scientific claims are statements made in science based on an experiment.

These Scientific claims are backed by experimental data and their true results obtained from scientific investigation and experimentation.

When it comes to testing a hypothesis, you can think about what precisely you should think about when it comes to how you should test a hypothesis. You might be curious what this is actually called. We refer to this as an experiment.

The popularly accepted scientific method may be thought of as a technique used to test a hypothesis to see if it is true or incorrect. If the experiment is successful, the hypothesis will then become a conclusion once the data has been examined.

Thus, studying the effect of one thing on another in order to test a hypothesis is an experiment,

Learn more about the scientific claims, here

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Answer:

as a result of its motion

Explanation:

Explanation:

The kinetic energy of an object is given by due to its motion. Mathematically, it is given by :

[tex]E_k=\dfrac{1}{2}\times m\times v^2[/tex]

Where

m = mass of an object

v = velocity

The kinetic energy of an object depends on its mass and the velocity with which it is moving. So, basically kinetic energy of an object depends on its motion.                            

Answer:

Explanation:

An acid has H as the metal as in HCl

A base has OH as the nonmetal. (so Ca(OH)^2 is a base)

A salt has neither.

Answer:

Supernova

Explanation:

Stars have fixed lifespan. They are born and eventually die when they run out of fuel. An average mass star like sun ends of as white dwarf whereas a high mass star ends up as either neutron star or a blackhole. A high mass star when runs out of fuel first expands to become a supergiant red star and then blows of most of its mass on going supernova. The remnant core is either a neutron star or a blackhole.During supernova, all the heavy elements formed in fusion process is released.

When a high-mass star depletes its hydrogen and helium, it begins carbon fusion, creating heavier elements. After fusion ends, the star releases these elements via a supernova.

When a high-mass main sequence star exhausts both its hydrogen and helium fuel, it starts a process known as carbon fusion. During this process, heavier elements like carbon, neon, oxygen, silicon, sulfur, and iron are formed. The elements formed depend on the mass and temperature of the star.

Eventually, when nuclear fusion ends in the star, the heavy elements that have been formed in the star's core are expelled through a catastrophic event known as a supernova. A supernova is a stellar explosion that briefly outshines an entire galaxy, releasing as much energy as the Sun is expected to emit over its whole life.

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Answer:hot

Explanation:

Ice don’t move at all. cold makes it move slowly. Room temperature it’s ok it might be kinda fast but hot water moves fastest.

Answer: Option (D) is the correct answer.

Explanation:

In a hot source, molecules will have more kinetic energy. As a result, they tend to move randomly and at a rapid rate from their initial position.

So, when a wave travels through hot source then vibrations caused by it will also move at a faster rate due to high kinetic energy in the molecules of the source.

Whereas in ice or cold source molecules have very less kinetic energy. As a result, these molecules will be held much more closer to each other.

So, when a wave travels through it then it will find difficulty to pass through the molecules as they are held closer to each other due to which there is very less or no vacant space for the wave to pass on from one end to another.

At room temperature, a wave will travel less fast as compared to wave in a hot source.

Thus, we can conclude that in hot source of water would a wave travel the fastest.

Answer:

Convection occurs when thermal energy is transferred by the movement of fluid particles.

Explanation:

Transfer of heat energy by the movement of fluid particles is called convection. Convection takes place in liquids and gases due to kinetic energy. When heat is provided to liquids and gases they expand and move faster.

Molecules with higher kinetic energy become less dense and rise up to the surface of liquid, whereas molecules with lower energy move towards the bottom. This up and down movement of molecules causes convection currents in fluids.

Answer:

Convection occurs when thermal energy is transferred by the movement of fluids.

Explanation:

Convection is one of the three forms of heat transfer (conduction, convection and radiation) that transports heat between zones with different temperatures. Convection itself is the transport of heat through the movement of fluid. For example, when heating water in a saucepan, the water in contact with the base of the pan rises, while the water from the surface descends and occupies the place left by the hot one.

Answer:

A negative charged is induced on the balloon and the wool acquires a positive charge.

Explanation:

It gains negative electrons, therefore becoming negatively charged.

As charge cannot be created, nor destroyed, only transferred, this leaves the wool positive.

Option B. A negative charge is induced on the balloon and the wool acquires a positive charge.

They stick to each other.

It gains negative electrons, therefore becoming negatively charged.

A charge cannot be created, nor destroyed, only transferred, this leaves the wool positive.

Now that they have opposite charges, the two items attract.

Electrons are found free in nature (free electrons) and bound within atoms. Electrons are responsible for the negatively-charged component of an atom. In an atom, electrons orbit around the positively-charged atomic nucleus. In solids, electrons are the primary means of conducting current.

Learn more about electrons at

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Answer:

1. heat engine ~~ •a machine that converts the internal energy of a fuel into mechanical energy.

2. heat pump ~~ •an appliance that extracts heat energy from one source and deposits it

elsewhere.

3. Boiler ~~ •a heating appliance that uses heat energy released from fossil fuels to warm water for use in radiant or

convection heating systems.

4. Thermostat ~~ •an appliance that controls the maintenance temperature of a heating

system

Final answer:

Heat engine is a machine converting internal energy to mechanical energy; a heat pump moves heat from cool to warm areas; a boiler heats water with fossil fuel energy; and a thermostat maintains temperature in heating systems.

Explanation:

To answer your question of matching each term with the correct definition:

Answer:

elements

Explanation:

Answer:

Reactants

Explanation:

A combination reaction is usually defined as a type of chemical reaction in which two or more reactants are fused together to form a single product. For example, The two elements Hydrogen and Chlorine are linked together to form Hydrochloric acid.

This can be written as,

H + Cl -----> HCl (acid)

A decomposition reaction is usually defined as a type of chemical reaction in which a single and complex substance is disintegrated into two or more simple substances. For example, the same above reaction can be disintegrated into-

HCl (acid) ------> H + Cl

friction transforms KE into thermal energy (a)

That's why, if it goes on long enough, the moving object actually gets warm.

The correct answer is: a) friction transforms KE into thermal energy.Friction opposes motion by converting kinetic energy into thermal energy. This conversion can be observed through the generation of heat.

Thus, the correct answer is: a) friction transforms KE into thermal energy.

Chlorine and bromine would likely share electrons to form a covalent bond, not a common reaction. Answer C is correct, as halogens generally share electrons when bonded together.

When chlorine reacts with bromine, the outcome depends on the specific conditions of the reaction, such as the presence of other substances and the reaction environment. However, chlorine and bromine are both halogens, and a reaction between them is not typical because they are both nonmetals with high electronegativity. Chlorine is more electronegative than bromine, but not enough to draw electrons away from bromine to form an ionic bond. Instead, if they were to react directly, they would most likely form a covalent bond where electrons are shared between the atoms. Therefore, the most applicable answer to this particular multiple-choice question would be, "C. Electrons are shared between the Chlorine atoms and the Bromine atoms."

It's important to note that this type of reaction isn't common, and the halogens more typically form compounds with metals, where a metal donates electrons to the halogen, as in the formation of ionic bonds such as sodium chloride (NaCl). An example of such electron transfer is seen when sodium (Na), which has a low ionization potential, reacts with chlorine (Cl), which has a high electron affinity, resulting in the chlorine atom gaining an electron and sodium donating one.