what is the point in the sky directly overhead called? which constellation is closest to this point tonight?

Answers

Answer 1

The answers include the following:

The point in the sky which is directly overhead is called Zenith.The constellation which is closest to this point tonight is Polaris.

What is Constellation?

This is referred to as a group of stars that form a perceived pattern or outline and are usually given names and an example is hydra.

The Zenith as the name implies is known as the overhead point in the sky which is usually hardly seen while the constellation which is closest to this point tonight is Polaris due to the position thereby making it the most appropriate choice.

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Related Questions

suppose that the quarterback takes 0.30 ss to return to the ground after throwing the ball. how far ddd will he move horizontally, assuming his speed is constant?

Answers

The quarterback is located 0.3v above ground. The fundamental element of every projectile's body that is moving is its horizontal velocity (vx).

What is horizontal velocity?

The fundamental element of every projectile's body that is moving is its horizontal velocity (vx). In any projectile motion, it is typically utilized to know the velocity value at which the particle travels along the horizontal direction. It's even thought of as the body's starting point for movement.

Let's say the projectile-moving particle reaches the highest point of its horizontal path. In that case, the horizontal velocity will typically be zero since the force of gravity will cause it to fall vertically downward as soon as it reaches the peak point. Vertical velocity has no impact on this horizontal velocity when it is at its highest point.

Let the horizontal velocity of the object = v

X = vt

X = 0.3v

Thus, The quarterback is located 0.3v above ground.

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two ice skater, one is 60kg, the other 40kg. when the 60kg man pushes the 40kg woman with 120 n force, what will be the acceleation for the 40kg and 60 kg person respectively?.please enter only the number, no unit!

Answers

The acceleration for the 40kg and 60 kg person will be 3 m / s² and - 2 m / s² respectively if the 60kg man pushes the 40kg woman with 120 N force.

F = m a

F = Force

m = Mass

a = Acceleration

For 40 kg woman,

m = 40 kg

F = 120 N

a = F / m

a = 120 / 40

a = 3 m / s²

For 60 kg man,

According to Newton's third law of motion, for every action there will be an equal and opposite reaction. So the 40 kg woman will push back with a force of - 120 N.

a = - 120 / 60

a = - 2 m / s²

The negative sign indicates negative direction.

Therefore, the acceleration for the 40kg and 60 kg person will be 3 m / s² and - 2 m / s² respectively

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consider the properties of a string that has a length of 1.0 m and a wave speed of 45 m/s. show answer no attempt what is the fundamental frequency in hz of the string?

Answers

By using simple harmonic motion, it can be calculated that The fundamental frequency of the string will be 45Hz.

The wavelength of the standing wave for any given harmonic is related to the length of the string.

Considering the wavelength is equal to the length of the string. It means one wavelength is equal to the length of the string. If more wavelength is made then answer would be different.

so we have wavelength = 1m

wave speed = 45 m/s

as we know that from simple harmonic motion,

frequency = speed/wavelength

frequency = 45/1

frequency = 45 Hz

Hence frequency of the string is 45 Hz.

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explain how the energy/velocity of water/wind controls the size of the particles in clastic/detrital) rocks

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In fast-moving water only coarse material settles out and fine material is carried away. In slow-moving water only fine material, which can settle out.

What is the velocity of water?The velocity of water is the rate at which water moves.A technique that can quickly clear your drains is high-velocity water jetting. This procedure forces water through your pipes at a very high velocity, which aids in dissolving and removing any material that has built up in your drains.The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).The volume and speed of the water affect the flow. It is significant because of how it affects the stream's ecosystems, living things, and water quality. Large, fast-moving rivers can be exposed to pollution releases and experience minimal effects

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a basketball (hollow sphere) starts from rest and rolls down a hill without slipping. the hill is 70 meter high. total mechanical energy is conserved. find the linear speed of the basketball at the bottom in m/s.

Answers

The linear speed of the basketball at the bottom in m/s is 37.41 m/s.

The mechanical energy basket ball is conserved and the basket ball starts from rest. and roll down a hill of height 70m.

If mechanical energy is conserved,

Potential energy at top + kinetic energy at top = potential energy at bottom + kinetic energy at bottom.

At bottom, there is no potential energy, and at top, there is no kinetic energy.

Potential energy at top = kinetic energy at bottom.

Mgh = 1/2Mv²

M is the mass of the basketball,

v is the linear speed at the bottom,

h is the height of the ball.

Putting values,

v = √(2gh)

v = √(2x10x70)

v = 37.41m/s.

The speed of the basketball at the bottom is 37.41 /s.

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How is the 12 volt potential difference of the car battery shared between the six heating
elements?

Answers

Answer:

To say we have a 12.0-V battery implies that its terminals have a 12.0-V likely contrast. At the point when such a battery moves charge, it puts the charge through an expected distinction of 12.0 V, and the charge is given an adjustment of potential energy equivalent to Δ U = q Δ V .

six cells

There are six cells to a 12 volt lead corrosive battery. A battery cell's greatest capacity to convey current (amps).

A 12 V lead-stockpiling battery comprises of six cells, each delivering roughly 2 V. The genuine standard cell potential is acquired from the standard decrease possibilities. In light of the positive and negative charges on the battery terminals, an electric potential contrast exists between them.

A 6 cell lithium particle pack has an ostensible voltage of 21.6V to 22.2V and a most extreme charge voltage of 25.2 volts

Explanation:

One volt is the likely contrast between two focuses in an electric circuit when 1 joule of work is finished to move charge of 1 coulomb from one highlight other.A completely energized 12 volt battery ought to peruse at 12.6 volts on the multimeter. In the event that the perusing is lower than this, you'll need to accuse your battery of either a battery charger or by taking your vehicle for a drive.A 12 volt 105 AH battery can supply (under wonderful circumstances and to 100 percent release) 12 x 105, or 1260 Watt-hours (1.26 kWh).between 5 to 8 hoursThe short response is that a 200-watt sunlight based charger that creates 1 amp of current takes between 5 to 8 hours to charge a 12-volt vehicle battery totally.A 100Ah 12 volt profound cycle lead-corrosive battery can run a 100W ceaseless DC load for 6 hours whenever released to half as suggested. A 100Ah 12 volt lead-corrosive profound cycle battery could run a 100W evaluated AC food-blender for 7 hours with half Profundity of Release.Voltage contrast among An and B, VAB=(I1+I2)6=(2−1)6=6 volts.

a dockworker loading crates on a ship finds that a 29-kg crate, initially at rest on a horizontal surface, requires a 71-n horizontal force to set it in motion. however, after the crate is in motion, a horizontal force of 50 n is required to keep it moving with a constant speed. find the coefficients of static and kinetic friction between crate and floor.

Answers

The coefficients of static and kinetic friction between crate and floor are

0.25 and 0.176 respectively.

When a body is at rest and if a force is applied to move it, then it would require the force which is equal to the static friction force, if

fs is the static frictional force and the us is the static friction coefficient and Fn is the normal force

[tex]f_{s}[/tex] = us*Fn

Fn = mg

putting the appropriate values, we get

=  71/(29*9.8) = 71/284.2

= 0.2498 = 0.25

Now, similarly when body is in motion, kinetic frictional force is applied, so we can write

[tex]f_{k}[/tex] = uk*Fn

so putting the appropriate values, we get

= 50/mg = 50/284.2 = 0.1759

= 0.176

Hence the value of coefficient of static friction is 0.25 and the value of coefficient of kinetic friction is 0.176.

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Approximately how much kinetic energy does an object have from its motion if its mass is 150-kg and it is moving at a speed of 5. 0 meters per second?.

Answers

Answer:

1875 J

Explanation:

kinetic energy= [tex]\frac{1}{2}[/tex]×mass×velocity²

K.E=[tex]\frac{1}{2}[/tex]mv²

K.E=[tex]\frac{1}{2}[/tex]×150×5.0²

K.E= 1875 J

consider the boyle's law apparatus. suppose that the volume of the gas is 25 cc and the pressure is 30.0 lbs/in2. show answer no attempt if the plunger is depressed so that the volume is decreased to 10.0 cc, what will the pressure be in lbs/in2?

Answers

75 lbs/in^2 is the value of pressure. The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure.

What is pressure?

In the physical sciences, pressure is defined as the stress at a point within a confined fluid or the perpendicular force per unit area.

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.

P1V1=P2V2

The amount of force applied to a certain region is referred to as pressure. Absolute pressure, gauge pressure, and differential pressure are the three categories into which pressure is divided.

The distance between that point and the surface, the liquid's density. Gravitational acceleration are the factors of pressure.

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two identical, parallel-plate capacitors are connected to identical batteries and allowed to charge fully. a dielectric is placed between the plates of one of the capacitors while still connected to the battery and allowed to reach a steady state. discuss whether the capacitance, charge, and electric potential of the capacitor with the dielectric are greater than, less than, or equal to the capacitor without the dielectric.

Answers

Capacitance, charge and electric potential will be greater than the capacitor without the dielectric.

Capacitance is the a property of an electric conductor or set of conductors that is measured by the amount of separate electric charge that can be stored on it per unit change in electric potential.

The value of capacitance for the parallel plate is C = (3∈0AK)/d

Since two identical, parallel-plate capacitors are connected

therefore the value of capacitance for both the plate is C

Ceq. = (C1*C2) / C1 + C2 = C*C / C+C = C2

When the battery remains connected, the potential difference [V] remains constant

Q=CV

∴Cafter>Cbefore [C increased]

∴Qafter>QBefore [Q increased]

Potential difference and charge across the capacitor before the dielectric:

Qbefore = [tex]\frac{CV}{2}[/tex]

Vbefore = Vafter = V

Potential difference and charge on the capacitor after inserting the dielectric:

Qafter = Ceq*V = [tex]\frac{kCV}{k+1}[/tex]

Vafter = Q*After / KC =  [tex]\frac{\frac{kCV}{k+1}}{kc}[/tex]

Vafter=  [tex]\frac{V}{k+1}[/tex]   [K>1]

[Hence V decreases]

Vbefore > Vafter

Also,  E = [tex]\frac{V}{d}[/tex]

therefore [E]before > [E]after [E decreases]

Energy stored in the capacitor:-

U=[tex]\frac{1}{2} CV^{2}[/tex]

As V= constant

Cafter > Cbefore .

Hence Uafter > Ubefore

Thus, the electrostatic potential increases.

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A linear track begins at 0 meters and has a total distance of 100 meters to the finish line. Juliet starts at the 10-meter mark while practicing for a race.

Answers

A linear track beings at 0 meters and has a total distance of 100 meters, then she will go 55 meters. Hence, option D is correct.

What is speed?

The pace at which the distance a moving item travels changes is measured as speed. Since speed is a scalar, it has quantity but no orientation as a unit of measurement.

Let A represent Juliet's position. O is the starting point with OA = 10, AB = 45, and OP = 100 as its coordinates.

The location of Juliet following running 45 meters will therefore be 55 m, as may be seen from simple math. In the figure, it is OB.

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Your question is not complete, your question probably be :

A linear track begins at 0 meters and has a total distance of 100 meters to the finish line. Juliet starts at the 10-meter mar

while practicing for a race.

After running 45 meters, how far is she from the beginning of the track?

10 meters

35 meters

45 meters

55 meters

consider a monochromatic electromagnetic plane wave propagating in the z direction. at a particular point in space, the magnitude of the electric field has an instantaneous value of 442 v/m in the positive x-direction. what is the instantaneous magnitude of the poynting vector at the same

Answers

The instantaneous magnitude of the poynting vector will be 518.48.

To calculated magnitude of the poynting vector, we require to use the formula of poynting vector

S = E*B/u

since B = E/c

so , S = E^2 /uc

where , E is the electric field and B is the magnetic field ,

S is the poynting vector magnitude and c is the speed of light.

Putting the values, we get

S = (442x442) /uc

S =  195364 / uc

uc = 4πx[tex]10^{-7}[/tex] x 3 x [tex]10^{8}[/tex]

uc = 376.8

Now, S = 195364/376.8

S = 518.48

Hence The instantaneous magnitude of the poynting is 518.48.

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a car traveling with a constant velocity quickly comes to rest. while slowing down, the passengers inside the car are pushed forward by the force of .

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Using the concepts of motion, we got that Ma is the force exerted on the  passengers inside the car when a  car traveling with a constant velocity quickly comes to rest.

We know very well that according to newton second law of motion,

if a moving object is moving with some velocity v at any particular time t, then there is force acting on that object and that force is given by

F= dp /dt,

where dp is defines as change in momentum of the object. In other words,

dp=M×([tex]v_f_i_n_a_l[/tex] - [tex]v_i_n_i_t_i_a_l[/tex])

where [tex]v_f_i_n_a_l[/tex] and v[tex]_i_n_i_t_i_a_l[/tex] are the velocities of the object in different time.

So suppose car has some mass M kg

It is given that final velocity of the object is =0 as the car comes to rest,

suppose initial velocity is v

Therefore, F=[M×(0-v)]/t

=>              F= -M×(v/t)

=>              F= -Ma because acceleration =velocity/time

Here negative sign shows that force acts on the person in opposite direction of frictional force applied by the road.

Hence, when a car traveling with a constant velocity quickly comes to rest. while slowing down, the passengers inside the car are pushed forward by the force - Ma.

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why do you think it was initially difficult for astronomers to entertain the possibility that the spectra of quasars are highly red shifted

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In the 1960s, it was proposed that quasars could be compact objects ejected quickly from the cores of adjacent regular galaxies.

Why did it take so long for astronomers to comprehend quasar spectra?

Nobody anticipated that an object that resembles a star could have its spectral lines so drastically redshifted.

It's a concept that makes sense when you consider that as light's wavelength is extended, the spectral lines appear to have "shifted" toward the red portion of the spectrum.

Sound waves experience a similar effect when a source moves in relation to an observer.

As a result of the emission lines being "red shifted," astronomers initially had trouble distinguishing them in quasar spectra at optical wavelengths.

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a 4.3 kg object is suspended by a string from the ceiling of an elevator. the acceleration of gravity is 9.8. determine the tension of the string if it is accelerating upward at a rate of 2.1

Answers

The tension of the string is due to the mass suspended at a weight of 4.3 kg is 51.57N

The mass of the object = 4.3 kg

The acceleration due to gravity = 9.8 m/s²

The accelerating of the string upwards = 2.1 m/s²

The tension of the string can be found using the formula,

                  T = m(g + a)

where T is the tension of the spring

          m is the mass of the object

         g is the acceleration due to gravity

         a is the acceleration upwards.

Let us substitute the known values in the above equation, we get

                  T = 4.3 ( 9.8 + 2.1)

                     = 4.3 ( 11.9)

                     = 51.57

Therefore, the tension on the string is 51.57 N

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for a double slit experiment, what is the smallest separation (in nm) between two slits that will produce a second-order maximum for 652 nm visible light?

Answers

The smallest separation in terms of nm between two slits that will produce a second-order maximum for 652 nm visible light is  1.30 um

Since the relationship between wavelength and angle for  minima and maxima  in Young's double slit experiment is:

For constructive interference

d sinθ = n

for  Destructive interference

d sinθ = (n+1/2)λ, where  λ is the wavelength, n  is the order of maxima and minima, Since here n = 2

So the separation, λ =  652 nm , and  θ = 90

so, d sin90 = 2*652*10⁻⁹

=> d=  2*652*10⁻⁹/ sin90  

     =  1.30 X10⁻⁶

    = 1.30 цm

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how do permanent dipoles compare to dispersion forces and temporary dipoles in terms of formation and strength?

Answers

Permanent dipoles are created by the interaction of permanent charges, which are charges that do not lose their charge when they are separated, as opposed to temporary dipoles, which form when two unlike poles come into contact and then separate.

Permanent dipoles are strong; they can be formed even when there is no electrical current present. The strength of a permanent dipole depends on its size and intensity, but it's typically much stronger than a temporary dipole.

Dispersion forces are weaker than both permanent dipoles and temporary dipoles. They can be generated by any two objects whose surfaces have different charges, regardless of whether there is an electrical current present or not.

The strength of dispersion forces depends on the size and intensity of the charged object, but it's typically much weaker than a permanent or temporary dipole.

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A student decides to conduct a comparative investigation to study properties of elements.What is a benefit of conducting a comparative investigation rather than a descriptive investigation?
a It will be less time-consuming to collect data about elements.
b It will show a cause-and-effect relationship between two properties of elements.
c It will be less expensive to collect data and make observations about elements.
d It will provide much more information about properties of elements.
please answer right I'm on an exam and show picture to show right if u can

Answers

Answer:its b

Explanation: i took the test

a 873-kg (1930-lb) dragster, starting from rest, attains a speed of 26.3 m/s (58.9 mph) in 0.59 s. find the average acceleration of the dragster during this time interval. what is the magnitude of the anverage net force on the dragster durng this time?

Answers

The average acceleration of the dragster during this time interval is 44.57 m/s² and the average net force on the dragster during this time is 38915N.

The initial speed U of the dragster is zero while the final speed V of the dragster is 26.3m/s. The director runs for a total of time t of 0.59 seconds.

According to the equation of motion,

V = U+at

Putting values,

26.3 = 0.59a

a = 44.57 m/s².

So, the acceleration of the dragster is 44.57 m/s².

The force on the director is given by,

F = ma

m mass of the dragster and a is the acceleration of the dragster.

F = 873×44.57

F = 38915N.

So, the net average force on the dragster during this time is 38915 Newton.

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ii The firefighter slides through the vertical pipe with length h=15m. Its potential energy at the top is 1000J. Sketch a graph showing how the potential energy of the firefighter's weight changes with height. In the same graph, sketch the change in kinetic energy with height.

help​

Answers

Both graphs of energy are attached in the answer.

What is energy?

The ability of a body to do tasks may be referred to as energy. The joule is the SI unit of energy (J). or 1 kJ Equals 1000 J. energy guises: Potential energy, kinetic energy, thermal energy, chemical energy, and light energy are some of the several types.

Potential energy of a man due to gravity can be express as = mass × acceleration due to gravity × height.

Hence, graph, that shows potential energy of a firefighter slides through the vertical pipe with length, will be linearly decreasing type.

As, total energy is conserved, graph, that shows kinetic energy of a firefighter slides through the vertical pipe with length, will be linearly increasing type.

Graphical representation of both linearly increasing and linearly decreasing is attached here.

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discuss the statistical nature of the clausius statement of the second law that energy cannot go spontaneously from a colder to a hotter body. under what conditions is the statement applicable? in what sense is this statement incorrect?

Answers

It is true that clausius statement of the second law states that energy cannot go spontaneously from a colder to a hotter body.

What is second law of thermodynamics and what is clausius statement of the second law of thermodynamics?Second law of thermodynamics is the law stating that heat and energy are interconvertible and is transferred from one form to another.Clausius statement of the second law of thermodynamics states the same but it also states that energy and heat cannot be transferred from colder to hotter body.It simply justifies that heat cannot be transferred from hot reservoir to cold reservoir at any cost.The condition under which the clausius statement is true is that the entropy change should be greater or equal to zero.Hence if entropy change is zero or greater than zero then clausius statement is truly justified.

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What wavelength is the maximum absorbance observed in the spectrum displayed in figure 10. 11? report your answer using 3 significant figures.

Answers

The spectrum shown has a maximum absorption of 278.4 nm.

The absorbance between 400 and 650 nm is measured, often at intervals of 25 nm, to identify the wavelength of maximum absorption. To identify the wavelength of greatest absorption, the data can be analyzed or graphed.

The useful absorbance range for the majority of spectrometers and colorimeters is between 0.1 and 1. Values of absorbance more than or equal to 1.0 are excessive. Your solution is overly concentrated if the absorbance readings you are getting are 1.0 or higher.

Maximum Absorbance refers to an area with the highest absorbance level. We can infer from the graph that the absorbance is at its highest at wavelength 278.45 nm.

Therefore, maximal absorbance occurs at 278.4 nm wavelength.

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On a wet road, is a higher coefficient of friction on the tires safer or a lower one and pls explain I don’t get it

Answers

On a wet road, a higher coefficient of friction on the tires is safer as compared to a lower coefficient of friction.

What are friction and its coefficient?

Friction is defined as a force that resists the sliding or rolling of one object over another object. The coefficient of friction refers to a measure of the amount of friction present between two surfaces. When you calculate a coefficient of friction, you're calculating the resistance to motion at the interface of two surfaces of materials.

On dry surfaces, you have a high coefficient of friction of about 0.9, but driving on wet roads would be dangerous because the wet road coefficient is very low about 0.1.

So we can conclude that a higher coefficient of friction is recommended for a safe journey.

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the earth exerts a gravitational force on a person standing on the surface. the person also exerts a gravitational force on the earth. based on newton's laws, how do these two forces compare?

Answers

Answer:

F = M a        Newton's Second Law

The person is undergoing no acceleration, thus the upwards force of the earth on the person exactly balances the attraction of the earth on the person's center of gravity

(Also, Newton's third law that for every action there is an opposite and equal reaction}

the tide that results from a lunar wave is larger than the solar wave. group of answer choices true false

Answers

The given statement is true. A lunar eclipse happens when the Moon passes into the shadow of the Earth. A solar eclipse happens when the Moon passes between Earth and the Sun.

What is lunar wave and solar wave?

A lunar eclipse happens when the Moon passes into the shadow of the Earth. This is only possible when the Sun, Earth, and Moon are precisely or extremely closely aligned with Earth between the other two, which can happen only on a full moon night when the Moon is close to either lunar node.

A solar eclipse happens when the Moon passes between Earth and the Sun, completely or partially blocking Earth's view of the Sun. A new moon corresponds with such an alignment, showing that the Moon is closest to the plane of the Earth's orbit. The Moon completely obscures the disk of the Sun during a total eclipse.

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The given statement is true. A lunar eclipse happens when the Moon passes into the shadow of the Earth. A solar eclipse happens when the Moon passes between Earth and the Sun.

What is lunar wave and solar wave?When the Moon enters the shadow of the Earth, an eclipse occurs. This can only occur on a full moon night when the Moon is close to either lunar node, when the Sun, Earth, and Moon are precisely or extremely closely aligned with Earth between the other two.

When the Moon passes in front of Earth and the Sun, covering Earth's view of the Sun entirely or in part, a solar eclipse occurs. Such an alignment is accompanied by a new moon, demonstrating that the Moon is closest to the plane of the Earth's orbit. A total eclipse occurs when the Moon totally blocks out the Sun's disk.

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what is a strength of a magnetic field for a current loop with 5 a current and diameter of 1.0 m from an electric wire?

Answers

0.80tesla is a strength of a magnetic field.

how strong is the magnetic field, exactly?

At a distance r from the wire, a current I flowing through a long, straight wire generates a magnetic field with intensity H=I/2r. In other words, the field's strength is inversely proportional to the distance from the wire.

How is field strength determined?

Newtons per coulomb (N/C) or volts per meter (V/m) are the SI units for measuring electric field strength. E = F/q, where F is the force felt by a very small test charge q placed in a field E in a vacuum, gives the force felt by the charge.

given,

I = 5A , r = 1.0m

H=I/2πr

H = 5 / 2*3.14*1.0

H = 0.80tesla

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what is the acceleration of the earth due to jupiter's gravitational attraction at their average separation?

Answers

acceleration of the earth due to jupiter's gravitational attraction at their average separation Is 246590.053 metre/sec²

what is acceleration due to gravity?

Acceleration due to gravity is the acceleration gained by an object due to gravitational force. Its SI unit is m/s 2. It has both magnitude and direction, hence, it’s a vector quantity. Acceleration due to gravity is represented by g.

Enter the mass, radius and “x” for the unknown value in the respective input field

Now click the button “Calculate the Unknown” to get the acceleration due to gravity

Finally, the gravitational acceleration will be displayed in the output field.

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two 16.0 $kg$ ice sleds are placed a short distance apart, one directly behind the other, as shown in the figure. a 3.11 $kg$ cat, initially standing on sled 1, jumps across to sled 2 and then jumps back to sled 1. both jumps are made at a horizontal speed of 2.00 $m/s$ relative to the ice. what is the final speed of sled 2? (assume the ice is frictionless.)

Answers

The final speed of sled 2 = 0.77 m/s

What is impulse?

Impulse is the integral of the force (F) over the time interval (t) for which the force acts. Since force is a vector quantity, momentum is also a vector quantity. Momentum applied to an object produces a vector change equivalent to its linear momentum, and the resulting direction is also changed.

For the given case:

After first jump speed of sled 1 is = u₁

Since there is no external force acting on the sled-cat system there'll be no change in momentum.

u₁ × 16 + 2 × 3.11 = 0

u₁ = -0.38 m/s

Now, for sled 2

2 × 3.11 = (3.11 + 16)u₂

u₂ = 0.32 m/s

After the second jump:

-2 × 3.11 + 16 × v₂ = 0.32 × (16 + 3.11)

v₂ = 0.77 m/s

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Which will be attracted to (or repelled by) a magnet?
Check all that apply.
A. An electromagnet
B. An iron pipe
C. A copper wire not carrying current
D. A negatively charged piece of silver
E. An aluminum wire carrying current

Answers

Things which will be attracted to (or repelled by) a magnet are

An iron pipe

A negatively charged piece of silver

An aluminum wire carrying current

What is a repelling and attracting ?

According to the "rule of attraction of magnets," magnets will attract one another when their south poles are brought near together. According to the "rule of magnet repulsion," magnets repel one another when their respective north poles are brought close to one another.

Electrostatic forces are responsible for the attraction and repulsion between charged objects. When two bodies are not in contact, electrostatic force can still be present.

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Answer:

the answer should be: An Electromagnet, An Iron Pipe, and An Aluminum Wire Carrying Current

Explanation:

took the test

. a car going around a curve of radius r at a speed v experiences a centripetal acceleration ac. what is its acceleration if it goes around a curve of radius 3r at a speed of 2v?

Answers

The acceleration of the car that goes around a curve of radius 3r at a speed of 2v is 4 / 3 ( ac )

ac = v² / r

ac = Centripetal acceleration

v = Linear / tangential velocity

r = Radius of curve

This the acceleration of the car that goes around a curve of radius r and velocity v.

For a car that goes around a curve of radius 3r at a speed of 2v,

ac' = ( 2v )² / 3r

ac' = 4v² / 3r

ac' = 4 / 3 ( ac )

Therefore, the acceleration of the car that goes around a curve of radius 3r at a speed of 2v is 4 / 3 ( ac )

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