Using our understanding of orbits, which orbits (near or far) are moving more slowly?


near


far

Final answer:

When the current in a solenoid increases, the induced emf acts to decrease the magnetic flux by Lenz's Law, in an attempt to oppose the change in flux caused by the increased current.

Explanation:

If the current increases in a solenoid, the induced emf acts to decrease the flux. This is due to Lenz's Law, which states that the direction of the induced emf and the resulting current will be such as to oppose the change in magnetic flux that produced them. Therefore, when the current through a solenoid increases, it leads to an increase in the magnetic field and magnetic flux. The induced emf will generate a current that creates a magnetic field in the opposite direction, effectively attempting to decrease the magnetic flux back to its original state. This is how the induced emf maintains the overall stability of the magnetic flux within the solenoid.

It's also important to note that the induced EMF is related to the physical geometry of the device and the rate of change of current. While the number of coils in a solenoid and the rate at which the current changes are both important factors in determining the magnitude of the induced emf, the relationship involves the total change in magnetic flux through the solenoid, which is proportional to the number of turns (coils) in the solenoid.

Answer:

b. The side the boy is sitting on will tilt downward

Explanation:

Initially, the seesaw is balanced because the torque exerted by the boy is equal to the torque exerted by the girl:

[tex]\tau_b = \tau_g\\W_b d_b = W_g d_g[/tex]

where

Wb is the weight of the boy

db is the distance of the boy from the pivot

Wg is the weight of the girl

dg is the distance of the girl from the pivot

When the boy moves backward, the distance of the boy from the pivot ([tex](d_b)[/tex] increases, therefore the torques are no longer balanced: the torque exerted by the boy will be larger, and therefore the side of the boy will tilt downward.

Answer:

[tex]1.01\cdot 10^8[/tex] vibrations per second

Explanation:

The frequency of a wave corresponds to the number of vibrations per second:

[tex]f=\frac{N}{1 s}[/tex] (1)

where N is the number of vibrations per second.

In this problem, the frequency of the radio wave is

[tex]f=101 MHz =1.01\cdot 10^8 Hz[/tex]

And substituting into eq.(1), we find N:

[tex]N=f \cdot (1 s)=1.01\cdot 10^8[/tex]

(a) [tex]1.72\cdot 10^{-5} \Omega m[/tex]

The resistance of the rod is given by:

[tex]R=\rho \frac{L}{A}[/tex] (1)

where

[tex]\rho[/tex] is the material resistivity

L = 1.20 m is the length of the rod

A is the cross-sectional area

The radius of the rod is half the diameter: [tex]r=0.570 cm/2=0.285 cm=2.85\cdot 10^{-3} m[/tex], so the cross-sectional area is

[tex]A=\pi r^2=\pi (2.85\cdot 10^{-3} m)^2=2.55\cdot 10^{-5} m^2[/tex]

The resistance at 20°C can be found by using Ohm's law. In fact, we know:

- The voltage at this temperature is V = 15.0 V

- The current at this temperature is I = 18.6 A

So, the resistance is

[tex]R=\frac{V}{I}=\frac{15.0 V}{18.6 A}=0.81 \Omega[/tex]

And now we can re-arrange the eq.(1) to solve for the resistivity:

[tex]\rho=\frac{RA}{L}=\frac{(0.81 \Omega)(2.55\cdot 10^{-5} m^2)}{1.20 m}=1.72\cdot 10^{-5} \Omega m[/tex]

(b) [tex]8.57\cdot 10^{-4} /{\circ}C[/tex]

First of all, let's find the new resistance of the wire at 92.0°C. In this case, the current is

I = 17.5 A

So the resistance is

[tex]R=\frac{V}{I}=\frac{15.0 V}{17.5 A}=0.86 \Omega[/tex]

The equation that gives the change in resistance as a function of the temperature is

[tex]R(T)=R_0 (1+\alpha(T-T_0))[/tex]

where

[tex]R(T)=0.86 \Omega[/tex] is the resistance at the new temperature (92.0°C)

[tex]R_0=0.81 \Omega[/tex] is the resistance at the original temperature (20.0°C)

[tex]\alpha[/tex] is the temperature coefficient of resistivity

[tex]T=92^{\circ}C[/tex]

[tex]T_0 = 20^{\circ}[/tex]

Solving the formula for [tex]\alpha[/tex], we find

[tex]\alpha=\frac{\frac{R(T)}{R_0}-1}{T-T_0}=\frac{\frac{0.86 \Omega}{0.81 \Omega}-1}{92C-20C}=8.57\cdot 10^{-4} /{\circ}C[/tex]

C play all the songs on shuffle. entropy has to do with randomness

Answer:

play all the songs on shuffle APEX

Explanation:

This relationship is called Parasitism

The magnetic force acting on an electron moving eastward in a downward-directed uniform magnetic field would be to the north. This is determined by the right-hand rule, and the force direction is reversed because the electron carries a negative charge.

In the given scenario, an electron is moving in a uniform magnetic field that is directed straight downward. According to the right-hand rule, which is used to find the direction of force when a charged particle moves in a magnetic field, the force on the electron would be directed to the north. As electrons carry a negative charge, the force direction would be exactly opposite to that obtained using the right-hand rule.

The magnetic force acting on the electron is given by the Lorentz force law: F = qvBsinθ, where 'F' is the magnetic force, 'q' is the charge of the particle, 'v' is the velocity of the particle, 'B' is the magnetic field strength, and 'θ' is the angle between the velocity and the magnetic field vectors. Because the electron is moving eastward and the magnetic field is directed downward, they are perpendicular to each other (θ=90°). Hence sinθ in the equation becomes 1.

Since the charge of an electron (q) is negative, the direction of the magnetic force will be opposite to what the right-hand rule shows. Therefore, for an electron moving to the east in a magnetic field directed straight downward, the magnetic force will be directed to the north.

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Answer:

b. 1000m/1km

c. 1m/100cm

g. 1m/1000mm

Explanation:

To solve this you just have to keep in mind the conversion tables that meters have and that is given by the latin pre-fixes that are involved in their names:

1 meter.

1 kilo-meter, kilo means a thousand, so a kilo-meter would be a thousand meters.

1 mili-meter, mili means diveded by thousand, that means that there are a thousand mili-meters in a meter.

1 centi-meter, centi means divided by a hundred, so there are a hundred centi-meters in a meter.

That is why those are the correct options.

The standard fractions which represent correct conversion factors (ratios) are: 1000m/1km, 1m/100cm, 1m/1000mm.

This goes to say that:

1000m = 1km

1m = 100cm

1m = 1000mm.

Recall

10mm = 1cm

10cm = 1dm

10dm = 1m

1000m = 1km

In mathematics and science, conversion simply refers to or means the conversion of one unit to another unit of the same quantity is performed using multiplicative or divisive conversion factors. We can convert from one unit of a parameter or quantity to another such as

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Answer:

0.017 s

Explanation:

The period of a periodic signal is defined as the reciprocal of the frequency:

[tex]T=\frac{1}{f}[/tex]

where

T is the period

f is the frequency

For the electrical power, the frequency is

f = 60.0 Hz

Substituting into the previous equation, we find the period:

[tex]T=\frac{1}{60.0 Hz}=0.017 s[/tex]

The period of 60.0 Hz electrical power is 0.0167 seconds, calculated by taking the inverse of the frequency.

The period of an electrical power wave, such as that with a frequency of 60.0 Hz, can be found by taking the inverse of the frequency. In this case, the frequency is 60.0 Hz, meaning the power wave completes 60 cycles per second. To find the period of this electrical power, we use the formula Period (T) = 1/frequency (f), where 'f' is in hertz (Hz). Thus, T = 1/60, which calculates to a period of 0.0167 seconds. This indicates that each cycle of this 60.0 Hz electrical power takes 0.0167 seconds to complete.

The force of attraction will decrease when objects move apart

(a) -17 cm

Magnification equation:

[tex]\frac{h_i}{h_o}=-\frac{q}{p}[/tex]

where

[tex]h_i[/tex] is the size of the image

[tex]h_o[/tex] is the size of the object

[tex]q[/tex] is the distance of the image from the mirror

[tex]p[/tex] is the distance of the object from the mirror

In this problem, we have:

p = 51 cm (the object is 51 cm in front of the mirror)

[tex]\frac{h_i}{h_o}=\frac{1}{3}[/tex]

So, we can find q, the image distance:

[tex]q=-\frac{h_i}{h_o}p=-\frac{1}{3}(51 cm)=-17 cm[/tex]

and the negative sign means the image is virtual.

(b) -25.5 cm

Mirror equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

p = 51 cm

q = -17 cm

Substituting and re-arranging the equation, we find the focal length of the mirror:

[tex]\frac{1}{f}=\frac{1}{51 cm}-\frac{1}{17 cm}=-\frac{2}{51 cm}\\f=-\frac{51 cm}{2}=-25.5 cm[/tex]

and the negative sign is due to the fact it is a convex mirror.

Answer:

According to Einstein's theory of relativity, mass causes the curvature of space-time and this curvature is what we call gravity.  

This means, fluctuations or disturbances of space-time produced by a massive accelerated body, are able to modify the distances and the dimensions of objects in an imperceptible way .

If we see the space-time as a huge fabric, and place two objects (one more massive than the other), both objects will bend this "fabric" and will be "attracted" to each other. Nevertheless, this "attraction" is due to the bending of the space around each object.

General relativity explains gravity as the curvature of spacetime caused by massive objects. It predicts phenomena like gravitational lensing, time dilation, and gravitational waves, which have been confirmed by experiments.

General relativity, a theory proposed by Albert Einstein in 1916, explains gravity as a result of mass warping space and time.

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LASIK, or "laser-assisted in situ keratomileusis," is the most commonly performed laser eye surgery to treat myopia (nearsightedness), hyperopia (farsightedness) and astigmatism.

Like other types of refractive surgery

, the LASIK procedure reshapes the cornea to enable light entering the eye to be properly focused onto the retina for clearer vision.

In most cases, laser eye surgery is pain-free and completed within 15 minutes for both eyes. The results — improved vision without eyeglasses or contact lenses — can usually be seen in as little as 24 hours.

If you're not a good LASIK candidate, a number of other vision correction surgeries are available, such as PRK and LASEK laser eye surgery and phakic IOL surgery. Your eye doctor will determine if one of these procedures is suitable for your condition and, if so, which technique is best.

LASIK surgery uses an excimer laser with a wavelength of 193 nm, which is in the ultraviolet section of the electromagnetic spectrum. The strong absorption of this wavelength allows for greater accuracy in reshaping the cornea while minimizing damage to the lens and retina of the eye.

An excimer laser used in LASIK surgery emits electromagnetic radiation with a wavelength of 193 nm. This wavelength places the laser in the ultraviolet section of the electromagnetic spectrum.

The strong absorption of the 193 nm wavelength by corneal tissue allows the laser to deliver its energy precisely to a thin layer of the cornea, resulting in greater accuracy in reshaping the cornea to correct vision defects. The concentrated energy in the thin layer ensures that only the desired tissue is ablated, limiting damage to the lens and retina of the eye.

Answer:

a)The temperature of the gas in increased by four times its original value.

Explanation:

For a fixed amount of a gas, the ideal gas equation can be written as follows:

[tex]\frac{pV}{T}=const.[/tex]

where

p is the gas pressure

V is the gas volume

T is the gas temperature (in Kelvins)

For a gas under transformation, the equation can also be rewritten as

[tex]\frac{p_1V_1}{T_1}=\frac{p_2V_2}{T_2}[/tex]

where the labels 1,2 refer to the initial and final conditions of the gas.

In this problem, we have:

- The pressure of the gas is doubled: [tex]p_2 = 2p_1[/tex]

- The volume of the gas is doubled: [tex]V_2=2V_1[/tex]

Substituting into the equation, we find what happens to the temperature:

[tex]\frac{p_1V_1}{T_1}=\frac{(2 p_1)(2V_1)}{T_2}[/tex]

[tex]\frac{1}{T_1}=\frac{4}{T_2}[/tex]

[tex]T_2 = 4T_1[/tex]

So, the correct choice is

a)The temperature of the gas in increased by four times its original value.

The direction of an electric field is determined from the behavior of a positive test charge that is set free in the electric field.This charge moves along a distinct vector showing the direction of the electric field  Therefore the answer is b. a positive charge will move in the field.

The acceleration due to gravity is 1.62m/s^2, this is because the moons gravity is 1/6th that of Earth's (9.81m/s^2) hope this helps! you could also use Newton's law of gravity, F=GM/R^2 where g is the universal gravitational  constant, M= mass of the object and R=radius. There should be a neg sign in front of the equation since objects in free fall fall downwards from the given object. Hope this Helps........

Answer:

1/9 of that just outside the smaller sphere

Explanation:

The electric field strength produced by a charged sphere outside the sphere itself is equal to that produced by a single point charge:

[tex]E=k\frac{Q}{r^2}[/tex]

where

k is the Coulomb's constant

Q is the charge on the sphere

r is the distance from the centre of the sphere

Calling R the radius of the first sphere, the electric field just outide the surface of the first sphere is

[tex]E_0=k\frac{Q}{R^2}[/tex]

The second sphere has a radius which is 3 times that of the smaller sphere:

[tex]R'=3R[/tex]

So, the electric field just outside the second sphere is

[tex]E'=k\frac{Q}{R'^2}=k\frac{Q}{(3R)^2}=\frac{1}{9}(k\frac{Q}{R^2})=\frac{E_0}{9}[/tex]

So, the correct answer is 1/9.

Answer:

Direction

Explanation:

Answer:

Direction

Explanation:

Refraction: It is a process in which when a light ray passes from one medium to another medium then the direction of light ray changes.

Refraction are of two types

Rare medium: The medium of low refractive index than the other medium in which refraction takes place  is called rare medium.

Denser medium: The medium of high refractive index than other medium in which refraction takes place is called denser medium.

Refraction from rare medium to denser medium: when a light passes from rare medium of low refractive index  to the denser medium of higher refractive index then the light ray bend towards the normal.

Refraction from denser  medium to rare medium: When a light ray passes from denser medium to rare medium then the light will be refracted away from from the normal.

Hence, the refraction involve a change in direction.

in my dream i had meet my favorite y o u t u b e r ever and he decided to spend they day with me at my grandparents house. i walked out of the bathroom and he was sitting on my bed playing on his phone and my phone buzzed and i checked it he had given me a shout out on i n s t a but then after lunch we went down to the beach right after high-tide and we went skim boarding we then went fishing and played football with J u j u Smith-S c h u s t e r one of his friends and my favorite NFL player. we got back to the house way after dark ( this is when it gets weird) my grand parents were fuming because it was s o o o late and he did a j e d i mind trick type thing and yeah the next morning he brought J u j u and some other famous people\ y o u t u b e r s (D e e e s t r o y i n g Meek Mill S t e e z y Kane and Travis Scott and they rented out the place for us six and they all gave me a shout out on i n s t a and snap THE END

hope this helps with whatever you needed it for

also can you email me at j t b o u v i e r 9 2 7 4 @ g m a i l . c o m

the ones in spaces are because it wont let me post with them

a. 2.9 s

First of all, we can assume that the light of the lightning reaches us instantaneously, since the speed of light is very large and so light takes a negligible time to reach us.

Secondly, the speed of sound in air is

[tex]v=340 m/s[/tex]

So, the difference in time between the moment we see the flash of the lightning and the moment we hear the thunder is simply given by the time it takes for the sound wave to cover the distance of  d = 1 km = 1000 m, so:

[tex]t=\frac{d}{v}=\frac{1000 m}{340 m/s}=2.9 s[/tex]

b. 4.7 s

This part of the exercise is exactly identical to the previous one, except for the fact that this time the distance that the sound should cover is

d = 1.6 km = 1600 m

Therefore, the time difference is

[tex]t=\frac{d}{v}=\frac{1600 m}{340 m/s}=4.7 s[/tex]

Answer:

d. Longitudinal and mechanical

Explanation:

i'm pretty sure

Sound waves are correctly described as longitudinal and mechanical. They require a medium to travel, making them mechanical, and vibrate in the same direction as the wave's movement, making them longitudinal.

The correct set of terms that describes sound waves is Longitudinal and mechanical. Sound waves are mechanical because they require a medium (like air, water, or a solid substance) in order to travel. They are also longitudinal because the medium's particles vibrate parallel to the direction of the energy transport. This back and forth motion in the same direction of the wave causes compressions (high pressure) and rarefactions (low pressure) within the medium.

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Answer:

1.34 m

Explanation:

For an open-end tube, the frequency difference between two consecutive harmonics is equal to the fundamental frequency of the tube:

[tex]f_1 = f_{n+1}-f_n[/tex]

In this case, we have

[tex]f_{n+1}=576 Hz\\f_n = 448 Hz[/tex]

so, the fundamental frequency is

[tex]f_1=576 Hz-448 Hz= 128 Hz[/tex]

For an open-end tube, the fundamental frequency is also given by:

[tex]f_1 = \frac{v}{2L}[/tex]

where v is the speed of sound and L the length of the tube.

Since we know v = 343 m/s, we can solve the formula for L:

[tex]L=\frac{v}{2f_1}=\frac{343 m/s}{2(128 Hz)}=1.34 m[/tex]

Final answer:

To find the length of the tube, we can use the formula v = fλ, where v is the speed of sound and f is the frequency. By calculating the wavelength for the fundamental frequency and the second harmonic, we can determine the length of the tube. In this case, the length of the tube is approximately 0.595 m.

Explanation:

To determine the length of the tube, we need to find the wavelength of each harmonic. The fundamental frequency corresponds to the first harmonic, so its wavelength is twice the length of the tube. The second harmonic has a wavelength equal to the length of the tube. Using the formula v = fλ, where v is the speed of sound and f is the frequency, we can solve for the length of the tube.

For the fundamental frequency:

v = fλ

λ = v/f

Substituting the values:

λ = (343 m/s) / 448 Hz

For the second harmonic:

λ = (343 m/s) / 576 Hz

Since the wavelength of the second harmonic is equal to the length of the tube, we can solve for the length:

Length = λ = (343 m/s) / 576 Hz

Substituting the values:

Length = (343 m/s) / (576 Hz)

Calculating the length:

Length = 0.595 m

Therefore, the length of the tube is approximately 0.595 m.

OK.  I would build it the same shape and size as a microwave oven, but I would leave out all the normal electronics.

In the side compartment, in place of the electronics, at the top, I would put a little gas flame, like a Bunsen burner.  In the bottom of the side compartment, I would put a treadmill with two strong hamsters.  Then, I would install ductwork in the compartment so that when the hamsters turn the wheel, some fan-blades along the rim of the wheel would blow the hot air from the gas flame down and into the big food compartment.  This would warm the left-overs WITHOUT using electricity from the wall outlet, and without spraying any hazardous high-power RF energy into the kitchen.  

Hey I am here to help you.

Newton's law of universal gravation states that every particle attracts every other particles in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers

I believe that this answer was helpful.

Answer:

A. Air

Explanation:

A thermal insulator is a material that does not let the heat trasmitting through it, or it transmits heat not very efficiently.

Generally, the lower the density of the material, the better insulator the material is: this is because in materials with very low density, particles are very spread apart, so they cannot collide with each other, and so the vibrations of the particles (which determine how hot a substance is) cannot be transmitted very efficiently.

In the options listed in this problem, air is the material with lowest density, therefore it is the best thermal insulator among them.

Answer: A. Air

Explanation: Air is a poor thermal conductor because it's particles are farther apart.

Seafloor spreading, Crust becomes molten rock, Crust is formed, all of them I think

Answer:

seafloor spreading occurs. Denser plates slide under the lighter plates.

Explanation:

The oceanic crust bends deep inside and forms deep ocean trenches. The crust here actually sinks into mantle under continental crust  through the process called subduction which lasts for million of years. Subduction occurs due to oceanic crust being denser than continental crust.

Answer:

diffraction

Explanation:

diffraction occurs when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

When a laser passes through two closely spaced slits, a pattern of alternating light and dark bands called two-slit interference is observed, resulting from the constructive and destructive interference of the light waves. With a mixture of two colors of light, multiple, colorful interference patterns emerge on the screen.

When a laser shines on a screen after passing through two closely spaced slits, you observe a pattern called two-slit interference. This pattern consists of an array of alternating light and dark bands resulting from constructive and destructive interference of light waves. If the light consists of a mixture of two colors or more, each color will create its own interference pattern, leading to an even more complex pattern with potentially varied colorful bands depending on the wavelengths of light used.

If we use a mixture of light with two different wavelengths, we will see several interference/diffraction patterns superimposed on the screen. The width and spacing of these bands are influenced by the properties of the light like its wavelengths and the dimensions of the slits such as the slit width and separation between the slits. The result on the screen is a spectrum of colors emerging from the overlapping interference patterns of the different wavelengths. This fascinating phenomenon demonstrates the wave nature of light.

Transverse waves In transverse waves, particles of the medium vibrate to and from in a direction perpendicular to the direction of energy

Hope this answer helps you

The transverse wave carries the energy in the right angle of the direction of the wave's advances.

Therefore, the transverse wave carries the energy in the right angle of the direction of the wave's advances.

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The image seen through the eyepiece of a telescope is (option D)a virtual and reduced image.

The answer to this question is d. A virtual and reduced image. When you look through the eyepiece of a telescope, you see a virtual image, meaning that the image appears to be there but is not actually present. Furthermore, the image is reduced in size because the eyepiece acts as a magnifying lens.

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The image seen through a telescope's eyepiece is a virtual and enlarged image. This is due to the nature of the converging lens used in the eyepiece, which refracts light to enlarge and invert the image.

The image that is seen through the eyepiece of the telescope is a virtual and enlarged image. When you look through a telescope, you see a magnified image of the object, but it is not an image that can be projected onto a screen - hence it's termed 'virtual'. This is due to the convex, or 'converging', lens used in the eyepiece of most telescopes. This lens refracts incoming light paths from the objective lens to enlarge and invert the image. So the correct answer to the question 'Which answer best describes the image seen through the eyepiece of the telescope?' would be b. A virtual and enlarged image.

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Newton's Second law of motion is

F = m * a   ( force = mass * acceleration).

So if a is constant   then a = F 1 / m1  and  a = F2 / m2  then

F1 /m1 = F2 /  m2 and if  m1 > m2 then

F1 must be greater than F2.

Answer is C.

According to Newton's second law, a more massive object requires more force to accelerate at the same rate as a less massive object.

When two objects of different masses accelerate at the same rate, according to Newton's second law of motion, the more massive object requires more force to accelerate. This is because the force needed to accelerate an object is directly proportional to both the object's mass (m) and its acceleration (a), as described by the equation Fnet = ma. Since we are considering the same acceleration for both objects, the object with the greater mass will necessitate a larger force to achieve that acceleration.