What are some examples from regular life that support the claim that gravitational interactions are are attractive and depend on masses

Answer:

Explanation:The refractive index of a medium is the ratio of the speed of light in vacuum or air to the speed of light in that medium. In this case, we can calculate the refractive index of water as follows:

Refractive index of water = Speed of light in air / Speed of light in water

Refractive index of water = 3 x 10^8 m/s / 2.26 x 10^8 m/s

Refractive index of water = 1.33 (rounded to two decimal places)

Therefore, the refractive index of water is approximately 1.33.

From soonest to most recent: The globe is burned up by firestorms, an asteroid strike creates a crater, the atmosphere is clouded with dust, existing species perish due to the harsh environment, and new species emerge in ecological niches.

Because water is essential to life on Earth, scientists seek for it to point to potential habitats. Since these stars are long-lived enough for life to start and develop, astronomers believe that intelligent life is far more probable to exist in the vicinity of stars of types F, G, K, and M.

Astronomers can arrange their probabilistic thinking using the Drake equation. Since it can form lengthy chains that contain numerous additional atoms, carbon is a good building block for life.

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The resistance of the heating element is 9 Ohms

Ohm's law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) between them. Mathematically, this can be expressed as:

V = IR

In this scenario, we are given the power (P) and current (I) of a heater, and we are asked to find its resistance (R). Power can be calculated using:

P = IV

where V is the voltage across the heater. Since we are not given the voltage, we can rearrange Ohm's law to solve for the resistance:

R = V/I

Substituting the formula for power into this equation, we get:

R = (V/I) = (P/I²)

Substituting the given values of power and current, we get:

R = (325 W) / (6.0 A)² = 9.0 Ohms

The correct answer is (D).

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Answer:

Equivalent resistance, \(\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+....\)

Explanation:

The parallel combination of resistors is given by :

\(\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+....\)

In the parallel combination of resistors, the current through each resistor is the same while the potential divides. On the series combination of resistors, the potential divides while the current hrough the current is the same.

The main difference between the Bohr model and the electron cloud model is explained as, in Bohr's model, orbital paths around the nucleus are treated as discrete electron energy levels but the electron cloud model is a group of electrons circulating around a nucleus or a molecule. Usually refers to the valence electrons.

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Answer:

newton's 2nd  law

Explanation:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

\( \boxed{ \mathrm{Kinetic \: Energy = \frac{1}{2} m {v}^{2} }}\)

_____________________________

\(\mathrm{ \#TeeNForeveR}\)

Answer:

constant acceleration

Explanation:

I may be wrong, but I'm almost positive cuz I am also taking physics. ;)

Answer:

Constant acceleration in the positive direction.

Explanation:

Because it is a straight line with a positive slope, we can infer that the rate of acceleration remains constant as the line is linear, and as it states in the question, the slope is positive; therefore, it is moving in a positive direction.

Mass of an object does not depends on velocity of an object.

Mass is a scalar quantity that measures the amount of matter in an object, and it remains constant regardless of the object's motion.

It is a property of the object itself and does not depend on its location or motion. On the other hand, velocity is a vector quantity that measures both the speed and direction of an object's motion. It can change as the object moves or as its direction of motion changes.

There is no direct relationship between mass and velocity, and they do not affect each other. They are independent physical quantities that are used to describe different aspects of an object. The mass of an object determines its inertia and gravitational attraction, while velocity determines how fast and in what direction an object is moving.

For example, a car can have the same mass whether it is moving at 60 mph or standing still, but the velocity is different in both cases.

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When the force exerted by you in the box becomes equal to the force exerted by the box on you then the box reaches static equilibrium.

According to Newton's 3rd law of motion, when two objects interact with each other, they exert force on each other. These exerted forces are known as action-reaction pairs.

Force can be defined as a push or pull on an object leading to its interaction with another object. Force can be described as an interaction and is separated into two classes: contact and non-contact force.

Newton’s 3rd law of motion can be described as when the first body applies a force on the second body, the first body will experience a force with the equivalent magnitude in the opposite direction of the applied force.

The box will achieve the static equilibrium when:

F (you on box) = - F (box on you)

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During sewer pipe installation using a laser, a laser beam is projected through the pipe until it hits a target beam(c).

The target beam acts as a reference point or marker that helps align the pipe correctly during installation. By hitting the target beam, the laser beam indicates the desired direction and position for the pipe, ensuring accurate installation.

The target beam is often placed at the other end of the pipe or at specific intervals along the pipe's path, allowing the construction crew to adjust the alignment and slope as necessary. This process helps ensure the proper installation of the sewer pipe, minimizing potential issues and ensuring efficient drainage.

So c is correct option.
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Aluminum reacts vigorously and exothermically with copper chloride, the balanced chemical reaction becomes:

2Al + 3CuCl₂ → 2AlCl₃ + 3Cu

Considering that aluminium is a more active metal in the electrochemical series of metals than copper, it displaces copper from the bond. The result is the emission of gaseous hydrogen and red metallic copper. This reaction is quite intense and results in the production of heat.

The reaction between aluminium and copper(II) chloride is highly vigorous, as heat is generated, the reaction mixture becomes very hot, the blue hue owing to the Cu(II) ions fades, the aluminium foil disintegrates, a reddish brown solid emerges, and gas bubbles are released.

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Answer:

The percentage error in quantity P is 19%.

Explanation:

It is given that,

A physical quantity P is related to four observables a, b and c as follows:

\(P=\dfrac{a^3b^2}{c^4}\)

The percentage errors of measurements in a, b and c are 1%, 4% and 2% respectively.

We need to find the percentage error in quantity P. It is given by :

\(\dfrac{\Delta P}{P}\times 100=(3\times \dfrac{\Delta a}{a}+2\times \dfrac{\Delta b}{b}+4\times \dfrac{\Delta c}{c})\\\\=3\times 1+2\times 4+4\times 2\\\\\dfrac{\Delta P}{P}\times 100=19\%\)

So, the percentage error in quantity P is 19%.

The speed of a wave is the product of its frequency and wavelength. The speed of the periodic wave with the frequency of 3 Hz and wavelength of 2 m is 6 m/s.

Frequency of a wave is the number of wave cycles per unit time. It is the inverse of the time period of the wave. Frequency is inversely proportional to the wavelength  of the wave.

The relation between speed, frequency and wavelength of a wave is given by the expression as written below:

c =νλ

where, c is the speed, ν be the frequency and λ be the wavelength.

Given that ν = 70 or 70s⁻¹

and λ = 5 m

then speed c = 70 Hz × 5 m= 350 m/s

Therefore, the speed of the wave is 350 m/s.

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The force is acting in the +K direction since it is perpendicular to both the velocity and the magnetic field. Force on electron = 3.08 x 10⁻¹⁷ N

Current I = 26 A

Electron velocity V = 4.77 x 10 m/s

Distance r = 1.3 cm

= 1.3 x 10⁻² m 1.

Find the magnetic field:

Formula used to calculate magnetic field is:

B= μ0×I2πr

Where, μ0 = 4π×10⁻⁷B

= μ0×I2πrB

= 4π×10⁻⁷×26 2π×1.3×10⁻²B

= 2.02 × 10^-5 T2.

Find the force acting on the electron, when it moves in the direction directly away from the wire:

Formula to calculate force on electron is:

F= qVBsinθ

Where,F = Force acting on electron

V = Velocity of electron

B = Magnetic field

q = charge of an electron

θ = Angle between the direction of motion of an electron and direction of the magnetic field that, the electron is moving in a direction directly away from the wire, so it is moving perpendicular to the wire.

Therefore, θ = 90 degrees.

So the force can be calculated as:

F= qVB sin 90

F= qVB

Therefore,F = 1.6×10⁻¹⁹×4.77×10×2.02 × 10⁻⁵

F = 3.08 x 10⁻¹⁷ N3.

Find the force acting on the electron, when it moves in the direction parallel to the wire in the direction of the current:

the electron is moving parallel to the wire, so the angle between the direction of motion of the electron and direction of the magnetic field is 0 degrees.

So the force can be calculated as:

F= qVBsinθ

F = 0N₄.

Find the force acting on the electron, when it moves in the direction perpendicular to the wire and tangent to a circle around the wire in the +J direction:

Here, the angle between the direction of motion of the electron and direction of the magnetic field is 90 degrees.

So,θ = 90 degrees

Therefore, the force on the electron can be calculated as:

F= qVB sin 90

F= qVB

Therefore,F = 1.6×10⁻¹⁹ ×4.77×10×2.02 × 10⁻⁵ F

= 3.08 x 10⁻¹⁷ N

The force is acting in the +K direction since it is perpendicular to both the velocity and the magnetic field.

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i know it is c

here is the answer

Answer:

= 316.67 m/s^2

Explanation:

Acceleration formula =

A = \(\frac{V_{f} - V_{i} }{t}\)

\(A = \frac{1000 - 50}{3}\)

= \(\frac{950}{3}\)

= 316.67 m/s^2

Answer:

The answer is A. Cementing...

Explanation:

hope this helps

Answer:

plate tectonics

Explanation:

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Answer:6000

Explanation:

Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2. We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

Explanation:

what is the force

ican't under stand these question

These two objects are experienced different forces and the object which experiences the same change in momentum but over a shorter period of time will experience more force than the other object.

To know more about the dependance of force on momentum and time, we need to know more about force and how it works.

Thus, we can conclude that between these two objects, one, who experiences the same change in momentum for shorter period of time, will experience more force than other.

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The correct answer for the The last quarter phase of the moon is it crosses the meridian at sunrise .

A third quarter moon, or last quarter moon, rises around midnight and sets around noon. The Moon is nearly back to the point in its orbit where its dayside faces the Sun directly, and all we see from our vantage point is a thin curve.

The Last or Third Quarter is when we can see half of the Moon's illuminated portion and half of its shadow portion. This is why this phase is commonly referred to as Half Moon. We can only see half of the Moon because it is at a 90-degree angle to the Earth and Sun.

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A sample of a gas is compressible; i.e., its volume can be significantly decreased because the particles in the gas phase are separated by relatively large distances.

A gas is a substance that has no constant size or form. Whilst inside a closed container, gasoline will amplify to fill the field. An instance of gas is the air you breathe. The gas interior of your digestive tract is fabricated from the air and different gases.

Traits of Gases :

* Gases have neither definite shape nor particular volume. They expand to the dimensions of their container.

* Gases are fluid and go with the flow effortlessly.

* Gases have low density, except compressed.

* Gases diffuse (mix and unfold out) and effuse (tour thru small holes).

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Answer:

Find the letter below.

Explanation:

                                                                                1237 Richmond Avenue,

                                                                                Houston, Texas,

                                                                                U.S.A.

                                                                                3rd May, 2021.

The Principal,

Carnegie Vanguard High School,

Houston, Texas,

U.S.A.

Dear Sir,

           APPRECIATION FOR THE ADMISSION OFFER IN YOUR SCHOOL

          I humbly write this letter to express my sincere appreciation for the offer of admission in your highly esteemed institution of learning. The admission letter states that I was admitted to pursue a programme in Computer Science and this is a source of great delight for me. The opportunity is a unique one because I stand a great chance of acquiring deeper knowledge of programming software that will prove invaluable to me in my future career.  

         Over the years, I have been particularly thrilled with all the inventions that have been made possible with information technology and programming of many useful software. These inventions have made life a lot easier, hence my interest in getting the required knowledge that will enable me to contribute my quota to the society.

         This programme will also afford me the opportunity to relate with seasoned professionals in the field of Information Technology. When in contact with these professionals, I hope to ask them several questions on programming, the technicalities involved in it, and what is obtainable in the real-world scenario. Armed with these pieces of information, I believe that the programme will shape me to be an excellent professional that will be useful to the society.

         Once again, thank you for this very special opportunity. I hope to fully maximize the privilege.

Yours Sincerely,

Jessica Liam.

Hello!!

For this, use the formula:

\(\boxed{I=V/R}\)

\(\textbf{Being:}\)

\(\sqrt{}\) \(I = Current = ?\)

\(\sqrt{}\) \(V = Voltage = 160 \ V\)

\(\sqrt{}\) \(R = Resistance = 10\ \varOmega\)

\(\textbf{If we replace and resolve it}\)

\(I = 160\ V / 10\ \varOmega\)

\(I = 16\ A\)

\(\text{The current of that circuit is \textbf{16 Amperes}}\)

Answer:

As given in the question, a resistor is constructed by shaping a material of resistivity p into a hollow cylinder of length L and with inner and outer radii ra and rb, respectively.

Explanation:

The resistance of the device in terms of L, p, ra, and rb can be determined as follows:

(a) The formula to calculate the resistance of the device is given by R = (pL)/(2π)(1/ra - 1/rb). This is the general expression for the resistance of the device in terms of L, p, ra, and rb.

(b) Given that L = 4.00 cm, ra = 0.500 cm, rb = 1.20 cm, and p = 3.50 × 105 Ωm. Substituting these values in the above equation, we get R = (3.5 × 105 × 4)/(2π)(1/0.005 - 1/0.012)R = 3.69 Ω

(c) When the potential difference is applied between the inner and outer surfaces so that the resulting current flows radially outward, the general expression for the resistance of the device is given by

                                                                         R = (pL)/(2π)(ln(rb/ra))

This is the general expression for the resistance of the device in terms of L, p, ra, and rb when the current flows radially outward.

(d) The given values are the same as in part (b), substituting the values in the above equation, we get R = (3.5 × 105 × 4)/(2π)(ln(1.2/0.5))R = 12.45 Ω.

Therefore, the value of R is 12.45 Ω.

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