what did classical physics predict would happen to the light given off by an object as its temperature increased?

The outermost energy shell of the atom, where the electrons are situated in relation to the nucleus. the energy levels are-  1 (only"s"), 2 ("s","p"), 3 ("s","p","d"), 4 ("s", "p", "d", "f").

An atom's energy level is the set distance between its nucleus and any potential location for electrons. Additionally, energy levels might be compared to a staircase's steps.

Most major diseases, including heart disease, many types of cancer, autoimmune diseases like lupus and multiple sclerosis, and anemia, commonly manifest with a lack of energy (too few red blood cells). Another typical indicator of depression and anxiety is fatigue. Additionally, a side effect of several drugs is weariness.

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Answer:

B. Km/s/hr

Explanation:

Answer:

ik

Explanation:

Answer:

Explanation:

You need something that relates distance to what the gravitational pull is. You can set up a complex sort of proportion. What you need is a number that is comparable to 9.81 or you can just use the Gravitational Force formula with a 4 tier fraction.

Givens

x = the additional distance toward outer space above the radius of the earth.

G is the gravitational constant.

m1 = the person's mass (which does not change no matter where you are).

m2 = the earth's mass

F1 = 588 N

F2 = 300 N

Formula

\(\frac{F1}{F2} = \frac{588 N}{300N}=\frac{\frac{Gm1*m2/}{6400^2} }{\frac{G*m1*m2}{(6400 + x)^2} }\)

Solution

G*m1*m2 all cancel. So what you get looks like this.

\(\frac{588}{300} = \frac{(6400 + x)^2}{6400^2}\)

Cross Multiply

588 * 6400^2 = 300*(6400+x)^2  Now all you need do is solve for x.

x will be in km.

588*40960000 = 300 * (40960000 + 12800x + x^2)

1.2288*10^10 + 3840000x + 300x^2  = 2.408448*10^10

300x^2 + 3840000x + 1.2288*10^10 = 2.408448 * 10^10  

Subtract 2.409448 * 10^10 from both sides.

300x^2 + 3840000x - 1,179648 * 10^10

Now use the quadratic formula

I'm guessing I should have converted this to meters because I'm getting ridiculous numbers. They are already large enough as you can see. The method is correct, even if the numbers are not.  

Answer:

below

Explanation:

The primary hazard when working with technetium is inhalation of dust; such radioactive contamination in the lungs can pose a significant cancer risk. All technetium compounds should be regarded as highly toxic, largely because of its radiological toxicity. Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. The body, however, constantly excretes Tc-99 once it is ingested.

Answer:

Increase the amount of gas

Explanation:

By increasing the pressure of the solution, the amount of gas will have to increase. Solubility of gases increases as the pressure is made to increase. Before the pressure was increased, the gases moved freely about. But as it was increased, theses gases had more frequent collisions within this solution. Causing an increase. The liquid on its own will experience no changes.

Answer:

Increase the amount of gas

Explanation:

The lowest energy of an electron in an infinite well having a width of 0.050 nm is approximately 8.13 eV.In quantum mechanics, an electron in an infinite well is a model in which an electron is confined to a one-dimensional box with infinitely high potential barriers at either end.

Planck's constant (h/2π), m is the mass of the electron, and L is the width of the well.

To use this formula, we need to convert the width of the well from nm to m:L = 0.050 nm = 5.0 × 10⁻¹¹ m

We also need to know the mass of the electron:

m = 9.109 × 10⁻³¹ kg

Now we can calculate the lowest energy:

En = (1²π²ħ²)/(2mL²)

En = (1²π²(1.0546 × 10⁻³⁴ J·s/2π)²)/(2(9.109 × 10⁻³¹ kg)(5.0 × 10⁻¹¹ m)²)

En ≈ 8.13 eV

Therefore, the lowest energy of an electron in an infinite well having a width of 0.050 nm is approximately 8.13 eV.

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Answer:

If a star is moving towards the earth, its light is shifted to higher frequencies on the color spectrum (towards the green/blue/violet/ultraviolet/x-ray/gamma-ray end of the spectrum). A higher frequency shift is called a "blue shift".

Explanation:

It just means that the entire spectrum is shifted up in frequency.

The maximum height above the ground the ball will reach before falling back down is 20 meters. therefore, the correct option is B.

To find the time it takes for the ball to reach its maximum height, we can use the equation s = ut + 1/2at^2, where s is the distance traveled, u is the initial velocity, a is the acceleration, and t is the time.
Given:
Initial upwards velocity (u) = 20 m/s
Gravity acceleration (a) = -10 m/s^2 (negative because it acts in the opposite direction)
Distance traveled (s) = ?
To find the time it takes for the ball to reach its maximum height, we can use the equation v = u + at, where v is the final velocity.
v = 0 (at the maximum height, the velocity is 0)
0 = u + at
0 = 20 + (-10)t
-20 = -10t
t = 2 seconds
So, the ball will reach its maximum height after 2 seconds.
To find the maximum height (s), we can substitute the time (t) into the distance equation:
s = ut + 1/2at^2
s = 20(2) + 1/2(-10)(2)^2
s = 40 - 20
s = 20 meters
Therefore, the maximum height above the ground the ball will reach before falling back down is 20 meters.
The correct option is b.) The ball will reach its maximum height after 2 seconds, which will be 20 meters above the ground.

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Answer: Kinetic energy of electron = 7.45 x 10^-16 J We know that Potential difference = Work done per unit charge = Kinetic energy of electron / ( 1.6 x 10^-19 ) = (7.45 x 10^-16) / ( 1.6 x 10^-19) = 4656.25 V

Explanation:

The potential difference between the plates is \(4650.43V\)

The Potential difference is also defined as the work done per unit charge.

Work done = kinetic energy = \(7.45*10^{-16}J\)

Charge on one electron = \(1.602*10^{-19}C\)

Potential difference,

                         \(V=\frac{7.45*10^{-16}}{1.602*10^{-19} }=4650.43Volt\)

Hence, the potential difference between the plates is \(4650.43V\)

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The wavelength, frequency, and speed of this radio wave can be determined by knowing the values of e, k, and ω.

The given electric field e⃗ = esin(kz−ωt)(i^+j^) represents a radio wave that is propagating in the z direction with a sinusoidal variation in time and space.

Here, e is the amplitude of the electric field, k is the wave number, ω is the angular frequency, i^ and j^ are the unit vectors along the x and y directions, respectively.

To find the wavelength λ of this radio wave, we use the relation λ = 2π/k. Similarly, the frequency f can be calculated using the relation f = ω/2π.

The speed of the radio wave is given by v = fλ, which can also be expressed as v = ω/k.

Therefore, the wavelength, frequency, and speed of this radio wave can be determined by knowing the values of e, k, and ω.

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complete question is:

The electric field of a radio wave is given by  E= esin(kz−ωt)(i^+j^)Give a unit vector

in the direction of the magnetic field at a place and time where sin(kz−ωt) is positive.

Answer:

Every physical object causes vibrations when it moves in the air. This leads to creation of waves in the air that then continue to travel as a form of sound. Much like the drum example we've mentioned above, our vocal cords also vibrate when we talk. This vibration happens in air, solid mediums and liquid.

FROM

LONESOMESTAR

Answer:

Short answer: No

Explanation:

Long answer: Kinetic energy is the amount of energy in a moving object. Gravitational potential energy is the energy in an object because of the object's position in the gravitational field.

Imagine a car travelling along a road. There is a wall at one end of the road and car collides with this wall. The energy released when the car collides with the wall is the kinetic energy of the moving car. To have kinetic energy an object must have velocity. The equation for the kinetic energy of a moving object is

K.E = \(\frac{1}{2} mv^{2}\) , where m is the mass of the object and v is velocity. So, if velocity is zero (i.e. the object isn't moving), K.E = 0.

Now, imagine a car falling from a plane which is flying at a height of 300 metres from the ground. The energy the car possesses at a height of 300m is its gravitational potential energy. This is the energy which causes the falling car to move toward the ground in the first place.

You might think that as the car moves towards the ground, it has velocity since it's moving.  Well, yes; the car does have kinetic energy, but only when it starts moving; the car does not have any kinetic energy when it's on the cargo hold of the plane. It is the gravitational potential energy of the car which causes an increase in kinetic energy. The equation for gravitational potential energy is:

\(G.P.E = mgh\)  , where m= mass of the object, g is the gravitational field strength (i.e 10N/kg) and h is the height of the object from the ground. So, imagine if the car parked on the ground, its gravitational potential energy would be zero, and if gravitational potential energy is zero, then there will be no force to cause the car to start moving and gain kinetic energy.

In this sense, you might say that the kinetic energy of the object does depend on its gravitational potential energy, but remember, in the first example, the car was not moving downwards; it was moving horizontally. So gravitational potential energy only affects kinetic energy downwards, but kinetic energy can be in any direction.

And hence, gravitational potential energy does not affect kinetic energy.

The event that marks the end of a star's evolutionary life before becoming a white dwarf is a planetary nebula. So, option E is correct.

A planetary nebula is characterized by cosmic rays of gas and dust surrounding a dying star. This dying star becomes a white dwarf after the complete depletion of hydrogen in the core.

It gets its name from a scientist who described the gases to be looking like two planets around a dying star. Thus, it's called planetary nebulae. This marks the final stage of a dying star that becomes a white dwarf. It consists of the outer layers of the star.

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Answer

(D) the vectors must be the same size and pointing opposite to each other

Answer:

An atom is the smallest part of an element by itself, while molecules are built of multiple atoms.

Given :

A 1200 kg truck traveling at 20 m/s towards the east.

To Find :

The magnitude and direction of the momentum.

Solution :

We know, momentum is given by :

Momentum, P = mv

P = 1200 × 20 kg m/s

P = 24000 kg m/s

Now, we know, direction of momentum is same as the direction of velocity.

Therefore, momentum of truck is 24000 kg m/s and direction is towards the east.

Answer:

μ = 0.125

Explanation:

To solve this problem, which is generally asked for the coefficient of friction, we will use the conservation of energy.

Let's start working on the ramp

starting point. Highest point of the ramp

         Em₀ = U = m h y

final point. Lower part of the ramp, before entering the rough surface

        \(Em_{f}\) = K = ½ m v²

as they indicate that there is no friction on the ramp

          Em₀ = Em_{f}

          m g y = ½ m v²

          v = \(\sqrt{2gy}\)

we calculate

          v = √(2 9.8 0.25)

           v = 2.21 m / s

in the rough part we use the relationship between work and kinetic energy

          W = ΔK = K_{f} -K₀

as it stops the final kinetic energy is zero

          W = -K₀

The work is done by the friction force, which opposes the movement

          W = - fr x

friction force has the expression

          fr = μ N

let's write Newton's second law for the vertical axis

         N-W = 0

         N = W = m g

we substitute

            -μ m g x = - ½ m v²

           μ = \(\frac{v^{2} }{2 g x}\)

Let's calculate

           μ = \(\frac{2.21^{2}}{2\ 9.8\ 2.0}\)

           μ = 0.125

A 8.0 kg box is released from rest at a height y0 = 0.25 m on a frictionless ramp. The box slides from the ramp onto a rough horizontal surface. The box slides 2.0 m horizontally until it stops.

What is the friction coefficient of the horizontal surface?

Answer: 0.125

Answer:

B. 3 m

Explanation:

The position of the line at 3 seconds is 9 m and at 4 seconds is 12m .

Therefore; Displacement = 12 - 9 = 3 m

The only way to master any subject it to Practice, practice, practice!

Get a hold of the basics first. If your basics are right, then it is just straightforward from there. I have come across many courses on edx and coursera for statistics. Engage in the discussion forums on those sites. Learn from others. Practice problems and get your hands on some good books in statistics. Mastering any kind of a subject takes long, so get started right away!

I have just started learning Statistics and right now I am trying to get my basics in place. I enjoy the subject a lot and it gives me great pleasure in working on data.

hope the answer may be sufficient

may god bless

Answer:

B

Explanation:

Answer:

a) this stone was first called Schorl stone

b)the first modern name for this mineral was Black tourmaline

Explanation:

hope this helps you!

:)

The amplitude of the function is 5/2Period. The phase shift is Phase shift is π/2Midline and the midline of the given function f(x) is Midline = 2Using the trig function sin(x), the equation for the graph of f(x) can be written as:f(x) = (5/2) sin (x - π/2) + 2

The amplitude, period, phase shift and midline of the given function f(x) is given below:

The given sinusoidal function oscillates between -5 and 5, which is a distance of 5 from the center line.

The amplitude is half of the distance between the minimum and maximum values, which is 5/2.

Hence the amplitude of the function is = 5/2Period:

The distance between the peaks on the graph of the given sinusoidal function is 4.

Hence the period of the function is Period = 4Phase shift:

The standard position of the graph of sin(x) is y = sin(x) where the graph passes through the origin (0,0).

The given function is also sin(x) shifted to the right by π/2 units.

Hence the phase shift is Phase shift = π/2Midline:

The midline is the average value of the function. For the sine function, the midline is y = 0.

The midline of the given function f(x) is Midline = 2Using the trig function sin(x), the equation for the graph of f(x) can be written as :f(x) = (5/2) sin (x - π/2) + 2

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According to the question the velocity of Cart 1 is 17.3 cm/s and the velocity of Cart 2 is 20.0 cm/s.

Velocity is the speed of an object in a given direction. It is a vector quantity, meaning that it is composed of both magnitude (or speed) and direction. Velocity is the rate of change of an object's position with respect to time.

Cart 1:
Using the stopwatch, we measured the time it took for Cart 1 to travel 30 cm immediately after the hands were no longer in contact. We started the timer when the hands were no longer in contact and stopped the timer when Cart 1 had traveled 30 cm.
This took 1.73 seconds. Since we know the distance traveled (30 cm) and the time taken to travel that distance (1.73 seconds),
we can use the equation V = d/t (velocity = distance/time) to calculate the velocity of Cart 1.
Therefore, the velocity of Cart 1 is 17.3 cm/s.
Cart 2:
Using the stopwatch, we measured the time it took for Cart 2 to travel 30 cm immediately after the hands were no longer in contact. We started the timer when the hands were no longer in contact and stopped the timer when Cart 2 had traveled 30 cm.
This took 1.50 seconds.
Since we know the distance traveled (30 cm) and the time taken to travel that distance (1.50 seconds),
we can use the equation V = d/t (velocity = distance/time) to calculate the velocity of Cart 2.
Therefore, the velocity of Cart 2 is 20.0 cm/s.

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Answer:

50 N ---->

Explanation:

Opposing sides get subtracted so~

25-25 cancels out to zero so there is 0N

100 -50 equals 50 N ->

Along vertical direction, net force is 0N and along horizontal direction, the net force is 50N directed towards right.

To determine the answer, we need to know about how to calculate the net force.

To determine the net force along any direction, we have to sum all the forces that are directed along that direction.

Forces that directed along vertical direction are

Net force = 25 N (vertically upward) + 25 N (vertically downward)

                = 25 N - 25N = 0N

Here, we take '+ sign' for upward direction and '- sign' for downward direction.

Forces that directed along horizontal direction are

Net force= 100 N towards right + 50 N towards left

               = 100N - 50N

               = 50 N (towards right)

Here, we take '+ sign' for horizontally right direction and '- sign' for horizontally left direction.

Thus, we can conclude that 0 N is the net force along vertical direction and 50 N is the net force along horizontal direction.

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Earth has an albedo of about 30 percent, reflecting much of the sun's radiation back into space.

The energy that the Sun emits into space in the form of electromagnetic waves is known as solar radiation. This energy, which the Sun's surface emits, affects climatological and atmospheric processes.

With an albedo of roughly 30%, the Earth's surface reflects back into space 30% of the solar radiation instead of absorbing it. Higher numbers denote higher reflectivity, while albedo, which is represented as a percentage, refers to the reflectivity of a surface. By reflecting part of the sun's energy back into space and preventing the surface from scorching, Earth's albedo helps control the planet's temperature. This is essential for supporting life on Earth and helps maintain a stable climate.

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The complete question -

Earth has an _______ of about 30 percent, reflecting much of the sun's radiation back into space.

As the angle of inclination of the plane increases the work done reduces.

The work done by pulling an object through an inclined plane is calculated as follows;

\(W = F \times d\times cos(\theta)\)

where;

The value of cos(θ) decreases from 0 to 90⁰.

Thus, as the angle of inclination of the plane increases the work done reduces.

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