Why is the law of gravity an example of a universal law?


A. Gravity exists between small masses in an open system only.


B. Gravity exists between any two masses.


C. Gravity exists only on the earth and the moon.


D. Gravity exists for masses in a closed system only.

Answer:

Pedro has 24 M&M's left.

Explanation:

Divide 72 by 3 and you will get 24.

1/4 of the old gravity influence would remain.

Newton's universal principle of gravitation states that the attracting force among any two components is equal to the square of the length that separates them and equal to the ratio of their masses.

Gravitational pull is the term for something like the pressure which the planet exerts upon the object. Illustrations of movement caused by gravitational influence include the downward force of flow of water, the downward movement liquid flowing water, and the upward motion of a ball when it is tossed. Every two mass-containing items are attracted to one another by the gravitational force.

Since the force of gravity rarely aims to push masses apart, it is referred to as appealing since it constantly seeks to draw them towards.

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When the velocity of a particle moving along an axis is known, the instantaneous acceleration equal to zero is given as 0.6t.

We estimate the average speed between two places in time separated by t while allowing t to decrease. The outcome is the velocity function's derivative, v. (t).

The slope of the tangent line to the graph at any given location on the graph corresponds to the instantaneous acceleration there. The instantaneous acceleration of the particle is equal to 0 when this line is horizontal and has a slope of 0. According to the plot, these times correlate to the velocity function's extrema, which can be found at t = 1.75, 2.75, 3.25, and for all t = 4.

t = 0.6 is the most likely choice.

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Answer:

A. Neon and argon

General Formulas and Concepts:

Explanation:

Elements that have a full valence shell (the outermost shell), are in Group 18 of the Periodic Table.

Because their outermost shell is full, they are inert, meaning that they do not like to bond or react with other elements.

Therefore, these gases with a stable full valence shell are known as Noble Gases.

A. would be the correct answer.

Answer:argon and krypton

Explanation:

Noble gases

Answer:

im confused

Explanation:

Answer:

gpe gained = 20J

Explanation:

gpe = mass * gravity * height

gpe = (200/1000) kg * 10 * 10

gpe  = 20J

Answer:

The word "normal" in the phrase "normal force" indicates that: The force exerted by a surface is perpendicular to itself.

Explanation:

The Normal force refers to:

we can say that,

The standard force on the object lying on some surface is equivalent to the force of gravity.

generally The normal force is denoted with "N"

N = m*g

where m is mass of an object and g is gravitational acceleration.

hence

The word "normal" in the phrase "normal force" indicates that: The force exerted by a surface is perpendicular to itself.

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There are roughly 9.22 moles of Cl2 gas in 5.55 x \(10^{24\) molecules of Cl2 gas.

Divide the given number of molecules by Avogadro's number to get the amount of moles of Cl2 gas.

To solve for the amount of moles of Cl2 gas in 5.55 x \(10^2^4\) molecules of Cl2 gas, we need to use Avogadro's number, which is the number of particles in one mole of a substance.

Avogadro's number is approximately 6.022 x \(10^2^3\) particles per mole.

To find the amount of moles of Cl2 gas, we simply divide the given number of molecules by Avogadro's number.

So, 5.55 x \(10^2^4\) molecules of Cl2 gas divided by 6.022 x \(10^2^3\) particles per mole equals approximately 9.22 moles of Cl2 gas.

Therefore, the amount of moles of Cl2 gas in 5.55 x \(10^2^4\) molecules of Cl2 gas is approximately 9.22 moles.

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Answer:

the second force

Explanation:

this is the answer i hade for mine

The statement describes an advantage of recorded presentations is that the audience members have the opportunity to provide feedback. Thus, the correct option for this question is C.

A recorded presentation may be defined as a popular format of multimedia content with a duration of several seconds or minutes that significantly expresses the advantages of a product, service, or any idea with the support of interesting graphic images, concise text, and appropriate narration.

According to the context of this question, a recorded presentation delivers an advantage to the audience to provide feedback. This is because the process of recorded PowerPoint presentation gives the actual sense and understanding to the audience similar to the real event.

Therefore, the correct option for this question is C.

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The motorcycle and the car are moving in opposite directions, so their velocities are different.

Speed is the rate in which anyone travel.

In everyday use and in the kinematics, the speed of to every objects is the magnitude of the change of  its own  positions over the time  or the magnitude of the change of its position per unit of the  time;  thus a scalar quantity.

A motorcycle is being driven by to the north on a road moving in the north at 40m  per 1 hour. A car is driving on the same height the  road moving at the  south at 40m  her 1 hour.

The motorcycle and a car are moving in to the opposite directions, so the velocities are  different from each other.

As north and south both are  opposite directions.

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Hi there!

We can use Newton's Second Law to solve:

\(\large\boxed{\Sigma F = ma}}\)

∑F = Net force (N)

m = mass (kg)

a = acceleration (m/s²)

Rearrange the equation to solve for acceleration:

\(\large\boxed{a = \frac{F}{m}}\)

Plug in the values given to solve for the magnitude of the force.

\(a = \frac{95.4}{16} = \boxed{5.96 m/s^2 \text{ To the left}}\)

**However, if we want to assign the left direction to be NEGATIVE, then the acceleration of the cart due to a leftward net force would be -5.96 m/s².

Answer:

The correct

answer of Edge is C. Plate tectonics

Explanation:

The missing value in the table is the wavelength of the sound wave, which is calculated to be 6.3 meters using the formula wavelength = wave speed / frequency. so, the correct option is A).

The given problem provides the speed and frequency of a sound wave and asks to find the missing value of the wavelength.

Using the formula for wavelength,

λ = v/f

In this case, the frequency was 55Hz and the speed of the wave was 346m/s.

λ = 346 m/s / 55 Hz

λ = 6.3 m

the missing value was calculated to be 6.3 meters. The wavelength is the distance between adjacent crests or troughs of a wave and is the reciprocal of the frequency. so, the correct answer is A).

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--The given question is incomplete, the complete question is given

" A sound wave generated by musical note has the characteristics presented in the table. What is the missing value

A 6.3

B 4.7

C 7.5

D 5.6 "--

Answer:

President who did not win the popular vote

Explanation:

Critics of the Electoral college argue that the system can result in a selection of what?

No, mass and size are two different physical quantities that do not have any direct relationship.

Mass is a scalar quantity that measures the amount of matter in an object and is independent of its location or motion. It is the total amount of matter in an object, and it doesn't change when the object is compressed or expanded.

Size, on the other hand, is a measure of how big an object is. It can be defined in terms of length, width, and height, and it can change if the object is compressed or expanded.

So, mass does not depend on size, and size does not depend on mass. They are independent physical quantities that are used to describe different aspects of an object. For example, the mass of an object determines its inertia and gravitational attraction, while the size of an object determines the amount of space it occupies.

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The scalar components R and R₂ of the force R along the nonrectangular axes a and b are determined using given information. The orthogonal projection Pa of R onto axis a is also calculated.

Given information:

Magnitude of force R = 810 N

Angle between R and axis a = 117°

Angle between R and axis b = 25°

To find the scalar components R and R₂, we can use trigonometry. Let's denote the angle between R and the x-axis as θ. We can express R in terms of its components as follows:

R = R₁ + R₂

Where R₁ is the component of R along axis a, and R₂ is the component of R along axis b.

Using trigonometry, we can determine the values of R₁ and R₂ as follows:

R₁ = R cos(θ)

R₂ = R sin(θ)

To find the angle θ, we subtract the given angles between R and axes a and b from 90° (since axis a and b are nonrectangular):

θ = 90° - 117° = -27°

Now we can calculate R₁ and R₂ using the given magnitude of R and the calculated angle θ:

R₁ = 810 N cos(-27°)

R₂ = 810 N sin(-27°)

Finally, to determine the orthogonal projection Pa of R onto axis a, we use the formula:

Pa = R₁ = 810 N cos(-27°)

Substituting the values into the equations, we can calculate the numerical values of R₁, R₂, and Pa.

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Compared to other diffraction techniques, the advantage of X-ray diffraction is that it enables determination of three - dimensional molecular structure.

Diffraction is described as the interference or bending of waves via an aperture or around the corners of an obstruction into the area that forms the geometric shadow of the obstruction or aperture.

A common method for determining the crystallinity and structure of solid samples is X-ray diffraction (XRD).

In conclusion, X-rays are scattered by the electrons of atoms present in the sample without changing their wavelength, which causes the crystal X-ray diffraction phenomena.

Some advantages of X-ray diffraction

1) It determines the three-dimensional molecular structure.

2) It is a quick and effective method for determining unidentified minerals and materials.

3) Only a little sample needs to be prepared for analysis.

4) The generated data can be interpreted very easily.

5) XRD measurement equipment is commonly accessible.

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The earth is rotating on its axis. It will continue to rotate unless acted upon by an outside force is an example of Newton's first law of motion.

An object at relaxation stays at rest, and an object in motion remains in motion at steady velocity and in a direct line unless acted on by way of an unbalanced pressure. There are clauses or elements to this statement - one which predicts the conduct of stationary gadgets and the opposite that predicts the behavior of transferring gadgets.

There may be a crucial circumstance that should be met so as for the first law to be applicable to any given motion. The circumstance is described by using the phrase "... except acted upon by using an unbalanced pressure." because the long as the forces are not unbalanced - this is, so long as the forces are balanced - the primary law of motion applies.

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(a) The emission spectrum of hydrogen atoms with electrons initially in n=4 has 4 wavelengths, with the (b) longest being 486 nm in the (c) Balmer series (option a).

If a large number of hydrogen atoms have all their electrons initially in the n=4 state, the emission spectrum will have 4 different wavelengths.

This is because the electrons can transition to lower energy states, and each transition releases a specific amount of energy as a photon with a unique wavelength.

The longest wavelength that could be observed in this case is 486 nm, which belongs to the Balmer series. This series includes transitions from higher energy levels to the n=2 state.

The Lyman series corresponds to transitions to the n=1 state, and the Paschen series corresponds to transitions to the n=3 state.

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Three different wavelengths would be observed in the emission spectrum of these atoms. The longest wavelength that could be observed is 857 nm.

(a) When electrons in hydrogen atoms fall from higher energy levels to lower energy levels, they release energy in the form of electromagnetic radiation. The wavelength of this radiation depends on the difference in energy between the two levels. In this case, all the electrons are initially in the n=4 state, so they can fall to the n=3, n=2, or n=1 states, resulting in three possible transitions.

Therefore, three different wavelengths would be observed in the emission spectrum of these atoms.

(b) The longest wavelength that could be observed corresponds to the smallest energy difference between two energy levels. The smallest energy difference between the n=4 and n=3 states is given by:

ΔE = E4 - E3 = -2.18 × \(10^{-18\) J (\(1/4^2 - 1/3^2\))

The corresponding wavelength is given by the equation:

λ = hc / ΔE

where h is Planck's constant and c is the speed of light.

Substituting the values, we get:

λ = (6.626 × \(10^{-34\) J s)(3.00 × \(10^8\) m/s) / (-2.18 × \(10^{-18\) J)

λ = 8.57 ×\(10^{-7\)m = 857 nm

Therefore, the longest wavelength that could be observed is 857 nm.

(c) The wavelength found in part (b) belongs to the Balmer series. The Balmer series corresponds to transitions between energy levels with n greater than or equal to 3 and n=2. The transition from n=4 to n=3 is part of the Balmer series.

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Answer:

parallel combination of cell

Coastal areas can produce  inexhaustible source of energy. Tidal energy can be best used to generate electricity.

Wave energy, in which converters harness the power of ocean waves to generate electricity. Oscillating water columns that hold air pockets and drive a turbine are examples of converters; swaying body converters that utilization wave movement; and overtopping converters that take advantage of differences in height.

A renewable energy source is tidal energy. In areas with a significant tidal range—the difference in area between high tide and low tide—in the 20th century, engineers developed methods for utilizing tidal movement to generate electricity.

The table below describes some methods used to generate electricity. What is method 2?

Energy resource   Ideal location                    Possible problem

          1                   Volcanic area              None anticipated

           2                            Coast                  Hazard to shipping

           3                        Estuary                   Harm to bird populations

            4              Remote area with a river valley  Flooding of farmland

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True. Electronic books (e-books) have great potential in transforming the landscape of education, and textbooks are one of the most likely targets for this transition.

E-books offer a range of benefits for textbooks, including portability, interactive features, and the ability to update content more easily. With the widespread use of digital devices like tablets and e-readers, students and educators can conveniently access digital textbooks anytime, anywhere. E-books also enable dynamic learning experiences through multimedia elements, interactive exercises, and search functionality. The transition to electronic textbooks allows for cost savings, reduced environmental impact, and the ability to adapt content to evolving educational needs. Therefore, textbooks are prime candidates for embracing the advantages of electronic book formats.

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The most scientific guess (hypothesis) based on what is known about the behavior of galaxies is that Galaxies are continuously moving away from each other. This hypothesis can be tested using Hubble's Law.

Hubble's law indicates that almost all galaxies are moving apart from one another because the universe as a whole is expanding. Choose any two galaxies at arbitrarily, and they're most likely traveling apart from each other.

Hubble discovered that galaxies move away from us at a rate proportionate to their distance: more distant galaxies move away faster than closer ones. The accompanying graphic shows Hubble's classic graph of measured velocity vs. distance for neighboring galaxies.

The graph shows a linear relationship between galaxy velocity (v) and distance (d).

The equation for the above linear relationship is:

                                          v = H₀ x d

Where:

H₀ is the expansion rate

v = velocity of the galaxy; and

d = distance.

Using the above formula, the astronomer can measure or test to know whether indeed the new galaxy is moving relative to the Milky Way galaxy and at what rate.

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The net work required to cause the particle to move to the right at 47 m/s is 30.102 Joules.

To determine the net work required to change the particle's velocity from moving left at 27 m/s to moving right at 47 m/s, we can use the work-energy principle.

The work-energy principle states that the net work done on an object is equal to the change in its kinetic energy.

The kinetic energy of a particle is given by the equation:

KE = (1/2) * m * v^2

where m is the mass of the particle and v is its velocity.

Let's calculate the initial kinetic energy (KE_initial) and final kinetic energy (KE_final) of the particle.

Given:

Mass of the particle (m) = 41 g = 0.041 kg

Initial velocity (v_initial) = -27 m/s (negative sign indicates motion to the left)

Final velocity (v_final) = 47 m/s

Calculate the initial kinetic energy:

KE_initial = (1/2) * m * v_initial^2

= (1/2) * 0.041 * (-27)^2

= 0.5 * 0.041 * 729

= 14.9575 J

Calculate the final kinetic energy:

KE_final = (1/2) * m * v_final^2

= (1/2) * 0.041 * 47^2

= 0.5 * 0.041 * 2209

= 45.0595 J

Calculate the net work done:

Net work = KE_final - KE_initial

= 45.0595 - 14.9575

= 30.102 J

Therefore, the net work required to cause the particle to move to the right at 47 m/s is 30.102 Joules.

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Answer:

It's actually C. food webs

Explanation:

took the test

Answer: c

Explanation:

edge 2020

The final displacement of the F-35B Lightning fighter jet is determined as 24,991.2 m.

The displacement of the flight is calculated from triangle method of vector addition as follows;

Angle between the first two sides = 90 - 26⁰  = 64⁰

r² = a² + b² - 2abcosR

r² = 20² + 25000² - (2 x 20 x 25000) x cos(64)

r² = 624,562,028.9

r = 24,991.2 m

Thus, the final displacement of the F-35B Lightning fighter jet is determined as 24,991.2 m.

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Answer:

A) T1 = 566 k = 293°C

B) T2 = 1132 k = 859°C

Explanation:

A)

The average kinetic energy of the molecules of an ideal gas is givwn by the formula:

K.E = (3/2)KT

where,

K.E = Average Kinetic Energy

K = Boltzman Constant

T = Absolute Temperature

At 10°C:

K.E = K10

T = 10°C + 273 = 283 K

Therefore,

K10 = (3/2)(K)(283)

FOR TWICE VALUE OF K10:

T = T1

Therefore,

2 K10 = (3/2)(K)(T1)

using the value of K10:

2(3/2)(K)(283) = (3/2)(K)(T1)

T1 = 566 k = 293°C

B)

The average kinetic energy of the molecules of an ideal gas is given by the formula:

K.E = (3/2)KT

but K.E is also given by:

K.E = (1/2)(m)(vrms)²

Therefore,

(3/2)KT = (1/2)(m)(vrms)²

vrms = √(3KT/m)

where,

vrms = Root Mean Square Velocity of Molecule

K = Boltzman Constant

T = Absolute Temperature

m = mass

At

T = 10°C + 273 = 283 K

vrms = √[3K(283)/m]

FOR TWICE VALUE OF vrms:

T = T2

Therefore,

2 vrms = √(3KT2/m)

using the value of vrms:

2√[3K(283)/m] = √(3KT2/m)

2√283 = √T2

Squaring on both sides:

(4)(283) = T2

T2 = 1132 k = 859°C

A) The temperature at which the average kinetic energy will have a value of 2K10 is; T1 = 293 °C

B) The temperature at which the molecules have twice the rms speed, 2vrms is; T2 = 859 °C

A) We are given;

Initial temperature; T = 10°C = 283 K

Initial kinetic energy; KE = K10

Final kinetic energy; KE1 = 2K10

Now,formula for average kinetic energy of the molecules of an ideal gas is given as;

KE = (3/2)kT

Where;

k is Boltzmann constant

T is temperature

We are told that in the second case, KE = 2K10. Thus;

2K10 = (3/2)kT1

K10 = ¾kT1 - - - (eq 2)

In the first instance, we have;

K10 = (3/2)kT - - - (eq 1)

Put (3/2)kT for K10 in eq 2 to get;

(3/2)kT = ¾kT1

k will cancel out to get;

(3/2)T = ¾T1

Make T1 the subject to get;

T1 = 2T

Thus;

T1 = 2 × 283

T1 = 566 K

Converting to °C gives;

T1 = 293 °C

B) We want to find the temperature T2 (in degrees Celsius) at which the molecules will have twice the rms speed, 2v_rms.

Formula for kinetic energy is also;

KE = ½mv²

Thus;

½m(v_rms)² = (3/2)kT

v_rms = √(3kT/m) - - - (eq 1)

When rms speed is 2v_rms, we have;

½m(2v_rms)² = (3/2)kT2

v_rms = √(¾kT2/m) - - - (eq 2)

Thus;

√(3kT/m) = √(¾kT2/m)

Square both sides to get;

(3kT/m) = (¾kT2/m)

4T = T2

T2 = 283 × 4

T2 = 1132 K

Converting to °C gives;

T2 = 859 °C

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Answer:

objects that is at rest will remain at rest and an objects in motion will remain in motion with the same velocity unless changed by an unbalanced force.

Explanation:

A moving body must undergo a change of position.

The concept of inertia states that an object will maintain its current motion unless a force changes its speed or direction. The phrase should be understood as a shortened form of Newton's first law of motion's description of "the principle of inertia."

The inertia of motion is the resistance offered by the body to continue to be in the uniform motion unless an external force acts on it.

Movement is a change in a body part's position in relation to the entire body. It is one of the key characteristics shared by all living things. Examples of movement include eating, breathing, and eye blinking. Therefore, we may conclude that at least one portion of our body moves in some way every second.

Hence, a  moving body must undergo a change of position.

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An object's speed at any distance can be determined using the Hubble constant.

Since the Hubble constant is constant across all of space and the universe expands at the same rate everywhere, we refer to it as the Hubble constant.

The Hubble constant has been estimated to be 69.8 km/s/Mpc by the most current accurate measurements of the distances and motions of far-off, exploding stars, although other sources have raised the estimate to 74 km/s/Mpc.

These galaxies were chosen as part of a Hubble Telescope mission Space to gauge the universe's expansion rate, or the Hubble constant.

The region beyond which galaxies are moving away from us faster than the speed of light is known as the Hubble sphere, after Edwin Hubble who found the universe was expanding back in the 1920s.

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