which of the following can enter and exit a closed system?

a. matter and energy
b. neither energy nor matter
c. matter but not energy
d. enrgy but not matter

The weak nuclear force is responsible for allowing carbon-14 to become stable. Thus, the correct option is C.

Radioactivity may be defined as the process of the liberation of energy from the decay of the nuclei of certain types of atoms and isotopes.

During the process of radioactivity decay, a beta particle is terminated which leads to one neutron changing into a proton inducing carbon-14 to become nitrogen-14 which is more stable than carbon-14.

Therefore, the correct option for this question is C.

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Answer:

Cart A

Explanation:

Momentum can be computed by finding the product of mass and velocity. To solve this, you can use the formula below to find the greatest momentum:

p = mv

where:

p = momentum (kgm/s)       m = mass (kg)         v = velocity (m/s)

Because carts are moving along with the weights, we need to consider the whole system. This means that you need to add in the masses and the mass of the cart.

Cart A:

m = 200kg + 0 kg = 200 kg

v = 4.8 m/s

p = 200kg x 4.8 m/s = 960 kg-m/s

Cart B:

m = 200kg + 20 kg = 220 kg

v = 4.0 m/s

p = 220kg x 4.0 m/s = 880 kg-m/s

Cart C:

m = 200kg + 40 kg = 240 kg

v = 3.8 m/s

p = 240kg x 3.8 m/s = 912 kg-m/s

Cart D:

m = 200kg + 60 kg = 260 kg

v = 3.5 m/s

p = 260kg x 3.5 m/s = 910 kg-m/s

As you can see, Cart A has the greatest momentum.

Answer: A

Explanation: I took the test

Answer:

The answer is 2.28 seconds

Explanation:

Given data:

Work done = 8000J

Distance , d = 30 m

Power , P =3500 W

We know that

(a)  Work done = force × distance

      8000 J    = F x 30 m

                 F   = 8000 J / 30 m

                   =  266 N

(b) Power = work done / time taken

      3500 W = 8000 J/ time taken  

       3500 W x time taken = 8000 J  

         Time taken = 8000 J / 3500 W =2.28 s

Answer:

Explanation: At rest and in motion because an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force."

The law of inertia, also known as Newton's first law of motion, applies to objects at rest and in motion.

The term inertia comes from the Latin word inners, meaning idle, sluggish. The term inertia may also refer to the resistance of any physical object to a change in its velocity. This includes changes to the object's speed or direction of motion.

The law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

This means that an object at rest will remain at rest unless a force is applied to it, while an object in motion will continue to move in a straight line with constant speed unless a force is applied to it.

In other words, the law of inertia applies to all objects, whether they are at rest or in motion.

The behavior of an object is determined by the forces acting on it, or the lack of forces if no external forces are present.

Therefore, the law of inertia applies to objects in all states of motion.

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Answer:

Around 2.64172 quarts

Explanation:

Answer:

Jaylen can correct the error in his diagram by:

"Drawing the arrows on the right side of the opening so they point outward instead of inward."

Explanation:

The diagram that Jaylen made is showing diffraction of light in which when light passes through a narrow slit, it is diffracted into semi-circular waves. the direction remains the same.

Answer:

( a ). By drawing the arrows on the right side of the opening so they point outward instead of inward.

Explanation:

As light is passing through a narrow hole, it is moving from left side to the right side, hence even after entering the opening its direction will not change.

This picture represent incorrect direction in right hand side. Light is moving from left to right and after passing the opening, it is expanding in outward directions hence Jaylen should correct the sign of the arrow by point them outwards.

Answer: The height of the satellite above the surface of Earth is [tex]8.02\times 10^{5}m[/tex]

Explanation:

Given

Mass of the satellite, m= 1160 kg

tangential speed , v = 7446 m/s

Centripetal force , F = 8955 N

Radius of earth , R= [tex]6.38\times 10^{6}[/tex] m

Let height of satellite above surface of the Earth be H

Centripetal force on satellite is given by

[tex]F=\frac{mv^{2}}{R+H}[/tex]

=>[tex]H=\frac{mv^{2}}{F}-R[/tex]

=>[tex]H=(\frac{1160\times 7446^{2}}{8955}-6.38\times 10^{6}) m=8.02\times 10^{5}m[/tex]

Thus the height of the satellite above the surface of Earth is [tex]8.02\times 10^{5}m[/tex]

Answer:

8.02 x 10^5 m

Explanation:

8.02 x 10^5 m

The most likely method of heat transfer from the heating element to the pot to the boiling water would be conduction, as it is the process by which heat is transferred through direct contact.

The most likely method of heat transfer described in the question would be conduction. This is the process that takes place when heat is transferred through direct contact between materials. In the case described in the question, the heating element comes into direct contact with the pot, and then the pot comes into direct contact with the boiling water, thus the heat is transferred from one to the other. This is conduction.

It's also interesting to note the other forms of heat transfer for comparison. Convection is the process of heat transfer by actual movement of matter; it can't happen through solid materials, such as between a pot and the heating element, but only through liquids, gases, and plasma. On the other hand, radiation is the transfer of energy by electromagnetic waves and doesn't require a medium (such as air, or a metal pot) to happen.

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Answer:

Explanation:H2 which is mean 2 atoms of hydrogen

Answer:

2

Explanation:

Average velocity =

(distance and direction of their change in location)

divided by

(time for the change) .

Distance and direction of their change in location = 2.0 km east  (their "displacement")

Time for the change = 30 minutes

Average velocity = (2.0 km east) / (30 minutes)

Average velocity = (2/30) (km east/minute)

Average velocity = 0.067 km/min east

or

Average velocity = 4.0 km/hr east

Just to be difficult, the question specifies that the answer must be given in units of m/s.  Is no problema for nosotros:

Average velocity = (4.0 km-east/hour) x (1,000 m/km) x (1 hour/3600 sec)

Average velocity = (4 x 1,000 / 3,600) (km-east-meter-hr / hr-km-sec)

Average velocity = 1.111... m/s East

Answer:

thanks for the asnwer

Explanation:

Globalization facilitates international trade, leading to increased wealth, better and less expensive products for consumers, and higher incomes for employees of successful businesses. It also creates international awareness and serves as a political counterbalance to domestic protectionism.

One of the key benefits of globalization is the potential for increased wealth across nations. Through reductions in tariffs, quotas, and other trade barriers, as well as improved transportation and communication technologies, globalization has driven down costs. This has facilitated international trade, allowing consumers to enjoy better and less expensive products and businesses to tap into larger markets, thereby increasing their profits. Employees of these successful businesses can also benefit from higher incomes.

Another advantage is the creation of international awareness and empowerment, promoting cultural exchange and international cooperation. Lastly, international agreements and treaties can act as a counterweight to domestic special interest groups, helping to prevent protectionist policies that could otherwise harm global economic progress.

Answer:

Electric current is continuous, and static electricity is not continuous.

Explanation:

Electric current is defined as rate of flow of charge which is given by

[tex]i = \frac{dq}{dt}[/tex]

here we know that since this flow of charge is continuous so here electric current is continuous flow of charge.

Now for static electricity is instantaneous discharge of charge particles which are accumulated at a given point.

We can say it a part of a body is charged heavily then this heavy charge will instantaneously discharge to some other body of lower potential when it comes in contact with it.

So it is instantaneous current which flows for some fraction of time

so correct answer will be

Electric current is continuous, and static electricity is not continuous.

The difference between electric current and static electricity is "Electric current is continuous, and static electricity is not continuous." The correct option is A.

Electric current is continuous because it involves the continuous flow of charged particles, typically electrons, through a conductor.

When an electric potential difference (voltage) is applied across a conductor, electrons are able to move through the conductor from a region of high potential (positive terminal) to a region of low potential (negative terminal). This flow of electrons through the conductor is called an electric current.

The electrons in a conductor do not move randomly; they are guided by the electric field generated by the voltage source. The voltage source continually pumps electrons through the conductor, creating a continuous flow of charged particles.

The amount of current flowing through the conductor is dependent on the magnitude of the voltage applied, as well as the resistance of the conductor. Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across the conductor, and inversely proportional to the resistance of the conductor.

So, as long as a voltage source is present and the conductor has a low enough resistance, electric current will continue to flow continuously through the conductor.

Here in the question,

Electric current and static electricity are two different forms of electrical phenomena.

Option A is correct because electric current is a continuous flow of charged particles, typically electrons, through a conductor. Electric current is the movement of charges, and it is commonly measured in amperes (A).

Option B is not correct because static electricity is the buildup of electric charges on the surface of a non-conductive material, such as plastic or rubber. Static electricity is not a continuous flow of charged particles, and it can be discharged in a sudden burst of energy, such as when you touch a doorknob after walking across a carpet. Static electricity is usually measured in volts (V).

Option C and D are not correct because both electric current and static electricity involve the movement of electrons, not protons. In electric current, electrons move through a conductor, while in static electricity, electrons are transferred from one material to another, resulting in a buildup of electric charges on the surface of an object.

Therefore, the correct option is A. Electric current is continuous, and static electricity is not continuous.

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Answer:

Metals

Explanation:

Please mark brainliest and have a great day!

Answer:

because the lava underneath the plate was moving in different directions leading to the separation of pangea

Explanation:

Answer:

6400 m

Explanation:

You need to use the bulk modulus, K:

K = ρ dP/dρ

where ρ is density and P is pressure

Since ρ is changing by very little, we can say:

K ≈ ρ ΔP/Δρ

Therefore, solving for ΔP:

ΔP = K Δρ / ρ

We can calculate K from Young's modulus (E) and Poisson's ratio (ν):

K = E / (3 (1 - 2ν))

Substituting:

ΔP = E / (3 (1 - 2ν)) (Δρ / ρ)

Before compression:

ρ = m / V

After compression:

ρ+Δρ = m / (V - 0.001 V)

ρ+Δρ = m / (0.999 V)

ρ+Δρ = ρ / 0.999

1 + (Δρ/ρ) = 1 / 0.999

Δρ/ρ = (1 / 0.999) - 1

Δρ/ρ = 0.001 / 0.999

Given:

E = 69 GPa = 69×10⁹ Pa

ν = 0.32

ΔP = 69×10⁹ Pa / (3 (1 - 2×0.32)) (0.001/0.999)

ΔP = 64.0×10⁶ Pa

If we assume seawater density is constant at 1027 kg/m³, then:

ρgh = P

(1027 kg/m³) (9.81 m/s²) h = 64.0×10⁶ Pa

h = 6350 m

Rounded to two sig-figs, the ocean depth at which the sphere's volume is reduced by 0.10% is approximately 6400 m.

Answer:

8.8 N

Explanation:

Impulse = change in momentum

In the x direction:

Fx (0.625 s) = (0.350 kg)(12 cos 30° m/s - 25 cos 60° m/s)

Fx ≈ -1.18 N

In the y direction:

Fy (0.625 s) = (0.350 kg) (12 sin 30° m/s - 25 sin 60° m/s)

Fy ≈ -8.76 N

The magnitude of the force is therefore:

F² = Fx² + Fy²

F ≈ 8.84 N

Rounded to two sig figs, the force exerted by the wall is approximately 8.8 N.

Answer:

Geologists use seismic waves to locate the center of an earthquake.

Geologists use data from three or more data stations to determine the location of the epicenter.

A seismograph measures the difference between the arrivals of P waves and S waves.

Explanation:

Seismic waves refer to the energy within the Earth due to sudden movement and explosions. Basically, they are the energy traveling within the Earth, and this energy cause movement, an excess of it will cause major movements, causing damage in the surface.

So, the epicenter of a earthquake is tracked using seismic waves, but this process more complex that we thought, because geologists need to track the epicenter using other data stations which offer real time information about seismic waves. Using all this data, geologist can find the epicenter faster and accurately.

There are different types of seismic waves, there's the Primary Waves or P-Waves, they are called primary because they are the first to perceive by the seismic station, they push and pull constantly, like a spring. Another type of seismic waves is The Secondary Wave or S-Waves, this is slower than the first one, this type of waves can moves mass of rocks up and down, constantly perpendicular to its direction. These two types are called body waves, and they are used by geologist to locate an earthquake.

Lastly, we have the surface waves, which only travel through the crust. In this category we have Love Waves which are the fastest, moving side to side. Also, we have the Rayleigh Waves, which are waves that roll the ground like ocean waves roll the water.

Therefore, based on these definitions, there are three correct answers, first, third and last one.

On the basis of definitions of seismic waves, we can conclude that the seismic waves are used to locate the center of the Earthquake, determine the location of an earthquake, and measure the difference between the arrival of P-waves and S-waves.  

Seismic waves refer to the energy within the Earth due to sudden movement and explosions. They are the energy traveling within the Earth, and this energy cause movement, an excess of it will cause major movements, causing damage to the surface.

The epicenter of an earthquake is tracked using seismic waves, but this process is more complex than we thought because geologists need to track the epicenter using other data stations which offer real-time information about seismic waves.  Geologists can find the epicenter faster and accurately, using all such data

Thus, we can conclude that the seismic waves are used to locate the center of the Earthquake, determine the location of an earthquake, and measure the difference between the arrival of P-waves and S-waves.

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Answer:

Convex lens.

Explanation:

This lens forms real images (images that can be focused on a screen when the object is beyond a distance beyond F the focal length of the lens.

If the object distance is less than the focal length( In front of the focal point or between the focal point and the pole of the lens) , the lens forms a virtual enlarged image,

Answer:

Convex lens.

Explanation:

This lens forms real images (images that can be focused on a screen when the object is beyond a distance beyond F the focal length of the lens.

If the object distance is less than the focal length( In front of the focal point or between the focal point and the pole of the lens) , the lens forms a virtual enlarged image,

Answer:

when the temperatures of the two objects are equal

Explanation:

Thermal equilibrium is achieved between two objects when the temperatures of the two objects are equal. Heat flows from hot to cold objects. When the two objects attain equal temperatures, we say thermal equilibrium has been achieved

Answer:

A

Explanation:

The big bang suggests that the universe is constantly expanding.Distant galaxies moving closer would mean that  the universe is constantly contracting instead of expending which contradicts the statement.

Answer:

A. Over time, distant galaxies move progressively closer to Earth.

Explanation:

Over time, distant galaxies move progressively closer to Earth would contradict the big bang theory.

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Answer: Reliable and trusted

The sources used in the scientific research purpose should be reliable.

Explanation:

In doing the scientific research, the sources must not be of popular kind but should be representative kind which could represent the material and method adopted in the research very well. The sources are never termed as new or old sources, as the source is not bounded by time but space.

The source applicability is defined by the parameter used in the specified location and not time. Therefore, the source must be reliable which could give definite information and trustworthy.

Answer:Valence electron

The family properties in the periodic table are determined by the number of valence electrons, and chemical properties are influenced by protons and valence electrons. Atoms with the same number of protons but different neutrons are isotopes, maintaining the element's identity.

Each family in the periodic table has its own characteristic properties based on the number of valence electrons. The periodic table organizes elements by increasing atomic number, which is defined by the number of protons within the nucleus of an atom. The chemical properties of an element are primarily determined by its number of protons and valence electrons. Atoms with the same number of protons but differing numbers of neutrons are known as isotopes and do not change the element's location in the periodic table. For example, carbon will always have six protons, regardless of the number of neutrons; thus, it retains its chemical identity as carbon.

Answer:

metal

Explanation:

metal is an excellent conductor for heat and electricity therefore making it perfect to experiment with different temperatures.

Answer:

I think it's called "Down syndrome."

Explanation:

Hope my answer has helped you!

Answer:

focuses light from distant objects

The last alternative is correct

Explanation:

An optical telescope is an instrument that collects  and focuses light from distant objects.

An optical telescope is an instrument designed to make distant object appear nearer.

Answer:

distant

Explanation:

Hello There!

"Protons" are positive charges in an atom. It's also equal to the atomic number.