please help on this one ?

Answer: Option D. The total amount of both matter and energy does not change.

Explanation:

From Law of conservation of energy and Einstein's mass-energy relation, we know that, energy neither is formed not is destroyed. It converts from one form to another. Einstein's mass-energy relation: E = mc². It means, Matter is a form of energy i.e. matter holds energy equivalent to product of its mass and square of speed of light. Matter and energy can change forms but the total amount does not change in a closed system. Thus, correct option is D.

Answer: the total amount of both matter and energy does not change (d)

Explanation:

i just got this question on Study Island

im pretty sure it will go to the right side.

subtract 100 - 50

= 50

it is the right side because u have to subtract 50 - 10

it is colliding with a proton or neutron, it is deflecting toward point X. is the best explanation for why a particle is striking point X.

Alpha particles, also known as alpha rays or alpha radiation, are made up of two protons and two neutrons bonded together to form a helium-4 nucleus-like particle.

The experiment demonstrates Rutherford's atomic model, and he reasoned that every atom has a nucleus that holds all of its positive charge and the majority of its mass.

it means that most of the space inside it is vacant, but when it strikes the nucleus directly, it returns at 180°, and when it passes through the nucleus, it bends away at a 90°.

Hence it is colliding with a proton or neutron, it is deflecting toward point X. is the best explanation for why a particle is striking point X.

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Answer:   a). Grip

The grip is the important thing to be consider for golfer. It is the most fundamental important aspects to the game, because it provides the solid contact.

Applying the correct grip, results in better golf shots and an increased confidence to the golfer, to address the ball in the right direction.

Simply the grip is the pressure applied to the club with the hand such that the golfer feels comfortable to make a brilliant shot.

Answer: a. Identify and describe TWO environmental problems associated with fracking.

The two environmental problems associated with fracking are:

1. The natural gas liberated after fracking contaminates the ground water and the atmosphere. Hence, causes water and air pollution.

2.The chemicals used along with application of pressure to cause fracking will contaminate ground water.

b. Describe one economic benefit to society of using fracking to obtain natural gas from shale.

The fracking process is beneficial as it provided with natural gas from a shale. Natural gas is required to generate electrical energy and to meet transportation and household needs.

c. Describe which earthly sphere (or spheres) are impacted by fracking.

Geosphere and hydrosphere are the earth spheres which are impacted by fracking.

Answer: The amplitude of the wave is 3 cm

Explanation:

Amplitude is defined as the maximum distance that is moved by a point on a  wave which is measured from its equilibrium position. It is equal to the half the length of the vibration path.

In the given figure,

OA is the one half of the distance of the vibration pathway and is the amplitude of the wave.

Distance of OA = 3 cm

Hence, the amplitude of the wave is 3 cm

1. HP is the output horsepower rating of an engine, while Brake horse power is the input brake horsepower of an engine. ...  Brake horse power is the measurement of an engine's power without any power losses, while HP is  less the power losses Brake horse power

Final answer:

Brake horsepower (BHP) and thrust horsepower (THP) are two different measurements of power in engines. BHP refers to the power output of an engine, while THP is the power generated by a jet engine or propeller to produce thrust.

Explanation:

In physics, brake horsepower (BHP) and thrust horsepower (THP) are two different measurements of power, particularly in the context of engines.

Brake horsepower refers to the power output of an engine measured at the engine's crankshaft, before any losses due to friction or other factors. It is commonly used to describe the power of internal combustion engines in vehicles.

On the other hand, thrust horsepower is a measurement of power specifically for jet engines or propellers. It is the power that the engine or propeller generates in order to produce thrust and propel the aircraft forward.

by definition , frequency is the rate at which disturbance is made through a medium. hence when rate at which disturbance is made doubled, the frequency also gets doubled,

Time period is given as

T = 1/f                      where T = time period , f = frequency

so when frequency is doubled , Time period becomes half , since Time period is inversely related to the frequency.

Amplitude does not depend on frequency hence amplitude remains unchanged .

wavelength is given as

λ = v/f

Wavelength becomes half when the frequency is doubled since wavelength is inversely related to frequency and speed is constant.

Sir Isaac Newton discovered and described the laws of motion in his book Principia Mathematica published on July 5th, 1687.

D. Isaac Newton

Answer:

D, Isaac Newton.

Explanation:

Newton's laws of motion, relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Sir Isaac Newton.

The net external force on the falling ball is 62.87 N.

To find the net external force on the falling ball, we can use Newton's second law, which states that force is equal to mass multiplied by acceleration. In this case, the mass of the ball is 5.5 kg and the acceleration can be found using the equation of motion: d = (1/2)at^2, where d is the distance and t is the time. Plugging in the given values, we can calculate the acceleration to be approximately 11.43 m/s^2. Now, we can use Newton's second law: force = mass x acceleration = 5.5 kg x 11.43 m/s^2 = 62.87 N.

Answer:

The objects mass remains the same and its weight decreases

Explanation:

Mass is just a measurement of how much matter something contains. Weight is proportional to the gravitational pull the object is undergoing.

As the distance between an object and the center of the Earth is increased, the object's mass remains the same and its weight decreases.

It is the most fundamental characteristic of matter and one of the fundamental quantities in physics. Mass is a term used to describe how much matter is there in a body. The kilograms is the SI unit of mass (kg).

A body's mass remains constant at all times. only in exceptional cases where a significant amount of energy is supplied to or taken away from a body. A nuclear reaction, for instance, results in the mass of the substance being reduced as a very small amount of matter is transformed into a very large amount of energy.

It gauges how much gravity is pulling on a body.

The weight formula is provided by: w = mg

Weight being a force The SI unit of weight is the Newton, which is also the same as the SI unit of force (N). When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity; while the mass may not change from one location to another, the acceleration caused by gravity does.

As  the distance between an object and the center of the Earth is increased, acceleration due to gravity decreases. So the object's mass remains the same but its weight decreases.

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Answer:

N/nm

Explanation:

The spring constant is a factor on the proportionality between the force of a spring and its stretched distance. The force is the product of the spring constant, typically measured in Newtons per meter and the distance measured in meters.

The unit N/nm is correct, however, it implies the distance must be expressed in nanometers (billionths of a meter), which is quite unusual.

force/ectension suggesta A

Answer:

A. When the force of the water increases, the reaction force pushing the hose back also increases.

When the force of the water increases, so does the reaction force pulling the hose back. The law of action reaction is the concept used to explain.

According to Newton's third law of motion, every action has an equal and opposite reaction. As well as, the action and reaction are always acted in pairs.

The water flow in pipe increases the force of the water because of the law of action-reaction.

When the force of the water increases, so does the reaction force pulling the hose back. The law of action reaction is the concept used to explain.

Hence, due to the more reaction force or firefighters needed to help hold the fire hose when the increase of water flow increases the force of the water.

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Answer

Another wave

Explanation

Diffraction is the is the change of direction of a wave due to an obstacle or an opening in the media. It results in to a disturbance.

It occurs when a wave goes through a gap or meets a barrier in a media such as a small island, a large ship or a protruding rock.

The correct answer is another ship.

B. another wave

is the correct choice

When a hypothesis is confirmed true by evidence from many experiments, it becomes widely accepted by scientists, and it gets a new name: 'Theory' .

Δx = path difference between the waves from two speaker at the listener = difference in distance of speakers from the listener = 45 cm = 0.45 m

n =  1                     (for fundamental frequency )

λ = wavelength

v = speed of sound = 340 m/s

f = frequency of the sound = ?

using the condition for constructive interference

Δx = n λ

0.45 = 1 λ

λ = 0.45 m

frequency of sound is given as

f = v/λ

f = 340/0.45

f = 756 Hz

nearest choice is 764 Hz , hence the correct choice is A. 764 Hz

The instant it was dropped, the ball had zero speed.

After falling for 1 second, its speed was 9.8 m/s straight down (gravity).

Its AVERAGE speed for that 1 second was (1/2) (0 + 9.8) = 4.9 m/s.

Falling for 1 second at an average speed of 4.9 m/s, is covered 4.9 meters.

ANYTHING you drop does that, if air resistance doesn't hold it back.

The Answer is A)

nvfobovbb

0.58 Hz . . . . (none of the offered choices)

The attachment shows the formula for the fundamental frequency. In order to use it, we need the various parameters to be in compatible units. For tension (T) in Newtons, the mass density (m/L) must be in kg/m.

We have a mass density of 90 g/cm, so ...

... (90 g/cm)×(1 kg/(1000 g))×(100 cm/m) = 9 kg/m

Likewise, the length (L) must be in meters:

... (700 cm)×(1 m/(100 cm)) = 7 m

Then the fundamental frequency (f₁) is ...

... f₁ = √(T/(m/L))/(2L) = √(65/9)/(2·7) = 0.192 . . . Hz

The 2nd overtone (3rd harmonic) is 3 times this frequency:

... f₃ = 3·f₁ ≈ 3·0.192 Hz = 0.576 Hz

_____

Comment on answer choices

Very likely, your computer is expecting you to select 0.18 Hz. This number is the number you get if you use the mass density of 90 g/cm directly, without changing it to kg/m first. That is, the correct answer (0.58 Hz) is inappropriately divided by √10 to get 0.18 "Hz." (The units are not actually Hz, but are Hz×√10.)

Have your teacher show you the dimensional analysis that goes along with arriving at the number 0.18 "Hz".

You can't do this problem the way the units are now, and when you do try it as it stands, you can't get the answers they are getting. Since you are likely doing a review, you might be intended to get the a different answer than the ones listed so that you can make an educated appeal. You can proceed in one of two ways but you must choose one of them.

The rope is in gram / cm so you could change the 65 N into dynes  

Formula

f = sqrt(T / (m/L )) * 2 * L

Solution

The other way to do it to convert the 90 grams / cm into kg / m

90 grams / cm * [ 1 kg/1000 grams] * [100 cm / 1 m]

90 grams / cm = 9 kg / m

Givens

Solution

f3 = 0.576 Hz In any case the answer is not there and I'm reasonably certain that two of us doing the same question getting more or less the same answer cannot be totally incorrect unless we are both making the same mistake.

About 90 percent of the stars in space are Main Sequence stars. (c)

Answer:

c. Main Sequence

Explanation:

90% of the stars in space are in the main sequence stage.

Nebula is a cloud of dust and hot gases where stars are born. Giant and white dwarf are types of stars.

A plot of star temperature vs luminosity is used to classify all the stars. This plot is known as HR diagram. When plotted on the HR diagram, 90% of the known stars lie on the main sequence stage of the HR Diagram.

Fluorine (F) has higher potential energy as Neon (N) is a noble/inert gas.

Fluorine will lose another electron to gain stability.

Fluorine has the higher potential energy. And the statement, "This atom will lose two more electrons to fill its outer energy level" is correct.

The concept of potential energy of an atoms is like that, the electrons absorb energy, they excites and move to higher energy level. Then the distance between lower energy level and higher energy level decides the potential energy. Which means, higher the energy level, higher will be the potential energy.

Also, more the tendency to loose electrons, more will be the potential energy of electrons of an atoms.

Thus, we can conclude that fluorine has the higher potential energy. And the statement, "This atom will lose two more electrons to fill its outer energy level" is correct.

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Answer:

A.137.2N

B 137.2N

C.41.16 N

D.Yes

E. 34.3N

Explanation:

THe weight of any object is calculated by multiplying the mass of the object by the gravity of where they are in, in this case is the earth, the gravity of earth is [tex]9.8\frac{m}{s^{2} }[/tex], so the weight of the dog would be:

[tex]w=(14kg)(9.8\frac{m}{s^{2}})[/tex]

[tex]m=137.2 N[/tex]

Now the normal force is the same as the weight.

[tex]Nf=w= 137.2N[/tex]

The maximum force of static friction is calculated by multiplying the weight by the coefficient of static friction:

[tex]Sf=(w)(coefficient)[/tex]

[tex]Sf=(137.2N)(0.3)[/tex]

[tex]Sf=41.16[/tex]

To know this you just have to know the total static force to know if the dog moves, since the force pulling the dog towards the floor is on the Y axis and you are pushing on the x axis, that force is nulified, but you have the friction froce, which is 41.16N, since the force you are pushing with is 50N the dog moves.

When you are sliding somthing over any surface you just have to multiply the weight of the object by the coefficient kinetic friction.

[tex]Kf=(w)(coefficient)[/tex]

[tex]Kf=(137.2N)(.25)[/tex]

[tex]Kf=34.3N[/tex]

The statement about pointwise convergence follows because C is a complete metric space. If fn → f uniformly on S, then |fn(z) − fm(z)| ≤ |fn(z) − f(z)| + |f(z) − fm(z)|, hence {fn} is uniformly Cauchy. Conversely, if {fn} is uniformly Cauchy, it is pointwise Cauchy and therefore converges pointwise to a limit function f. If |fn(z)−fm(z)| ≤ ε for all n,m ≥ N and all z ∈ S, let m → ∞ to show that |fn(z)−f(z)|≤εforn≥N andallz∈S. Thusfn →f uniformlyonS.

2. This is immediate from (2.2.7).

3. We have f′(x) = (2/x3)e−1/x2 for x ̸= 0, and f′(0) = limh→0(1/h)e−1/h2 = 0. Since f(n)(x) is of the form pn(1/x)e−1/x2 for x ̸= 0, where pn is a polynomial, an induction argument shows that f(n)(0) = 0 for all n. If g is analytic on D(0,r) and g = f on (−r,r), then by (2.2.16), g(z) =

he speed up the incline is 300m/5s = 60m/s

the horizontal component of that is 60 cos 15 = 57.95m/s

Kinetic energy of an object is the energy it contains due to movement. If an object is at rest, it doesn't have kinetic energy. If it's moving, then it has kinetic energy. It's pretty simple! The amount of kinetic energy of an object is dependent upon two variables, one being the mass of the object

In a gravitational field, an object gains potential energy as it moves to a higher position, and loses this energy, transforming it into kinetic energy, as it descends. This is a manifestation of energy conservation where total energy remains constant while energy types (potential and kinetic) transform into each other.

The relationship between potential energy and kinetic energy involves the concept of energy conservation and transfer. In a gravitational field, an object gains potential energy as it moves to a higher position. This potential energy is stored energy due to its position in the gravitational field.

As the object descends, its gravitational potential energy decreases, and this energy gets transferred to kinetic energy. Hence, the kinetic energy of the object increases as it falls downwards. The kinetic energy of the object is related to its speed. The faster the object moves, the larger its kinetic energy. This energy transformation from potential to kinetic energy may continue until all potential energy is converted into kinetic energy, assuming there's no other form of energy loss like air resistance.

This interchange between potential and kinetic energy is a key aspect of energy conservation, which states that the total energy of an isolated system remains constant. In the case of this gravitational field scenario, the conversion from potential to kinetic energy illustrates the principle of energy being neither created nor destroyed, but simply transformed from one type to another.

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Answer:

(A) Perform another experiment to test their conclusions

Explanation:

Assuming both scientists are not making logical mistakes in their reasoning, if the data set permits two reasonable but different conclusions, then there is a need to improve such a data set. An improvement could comprise adding new/more samples, increasing accuracy of the measurement, or adding new aspect to the data sampling. This is repeated until there is a reasonable consensus among the scientists.

Force = mass × acceleration = kg × m/s^2 = Newton

Answer:

Option A is the correct answer.

Explanation:

Force = Mass x acceleration

Unit of force = Unit of mass x Unit of acceleration = kg x m/s²

kg m/s² is also called as Newton (N)

Option A is the correct answer.