A 18.0-μF capacitor is charged to a potential of 50.0 V and then discharged through a 285-Ω resistor. How long does it take the capacitor to lose half of its charge? How long does it take the capacitor to lose half of its stored energy?

The magnitude of the magnetic field is 8.70 T (Tesla).Answer: 8.70.

Given Data Number of turns (N) = 2190Total resistance (R) = 44 ΩArea of each turn (A) = 4.56 × 10⁻⁴ m²Charge induced (q) = 9.02 × 10⁻³ C Formula used Faraday's Law of electromagnetic induction states that:ε = -NdΦ/dt where ε is the induced EMF, N is the number of turns, Φ is the magnetic flux and t is the time.

As the magnetic field is zero, flux Φ₀ = 0Therefore,ε = -NdΦ/dt We know that, Current I = q/t

Therefore,ε = -NdΦ/dt = -Nd(BA)/dt = NBA/dt

Where B is the magnetic field strength We know that, B = ε/(NA/dt) = (q/dt)/(NA) = (9.02 × 10⁻³ C)/(2190 × 4.56 × 10⁻⁴ m²) = 8.70 T

Therefore, the magnitude of the magnetic field is 8.70 T (Tesla).Answer: 8.70.

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The possible valid accesses for an array a and vector v, each with 10 elements is given below:Array: a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9]Vector: v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]

The term array is used to define a set of similar data types that are stored in contiguous memory blocks. The index of an array starts at 0, which means the first element of the array is stored at index 0. In the case of arrays, the elements must be of the same data type.The term vector is defined as a dynamic array, which means that the size of the vector can be changed during runtime. Vectors are defined in the same way as arrays, except that they have a dynamic size limit and can be easily resized.

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Answer:D

Explanation:

Answer:

To change degrees Celsius in degrees Fahrenheit, the formula is:

F = 1.8C +32F=1.8C+32

So,C = 1.8C +32C=1.8C+32

C = -40C=−40

T=-40+273.15=233.15\ KT=−40+273.15=233.15 K

0.09/^oC

Answer:

1.5 m\s Ans ......

Explanation:

Data:

f = 0.5 Hz

w = 3 m

v = ?

Formula:

v = fw

Solution:

v = (0.5)(3)

v = 1.5 m\ s Ans ........

Answer:

The thermal energy increases and the molecules move faster.

The height of the roof is approximately 74.4 feet.

To determine the height of the roof, we can use the equation of motion for a falling object. The equation is:

h = (1/2)gt^2 + v0t + h0

where:
h is the height of the object
g is the acceleration due to gravity (approximately 32.2 feet per second squared)
t is the time taken for the object to fall
v0 is the initial velocity of the object (which is -140 feet per second in this case)
h0 is the initial height of the object (which is the height of the roof in this case)

Since the stone is dropped, the initial velocity (v0) is 0 and the equation simplifies to:

h = (1/2)gt^2 + h0

The stone hits the ground with a velocity of -140 feet per second, which means its final velocity (vf) is also -140 feet per second. We can use this information to find the time it took for the stone to fall using the equation:

vf = gt

-140 = 32.2t

Now, solve for t:

t = -140 / 32.2

t ≈ 4.35 seconds

Substituting this value of t back into the equation, we can solve for h0:

h = (1/2)gt^2 + h0

0 = (1/2)(32.2)(4.35)^2 + h0

0 = 74.4 + h0

Solve for h0:

h0 = -74.4 feet

Therefore, the height of the roof is approximately 74.4 feet.

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Maria Mitchell was an American astronomer who lived from 1818 to 1889. She was born on August 1, 1818, in Nantucket, Massachusetts, and passed away on June 28, 1889, in Lynn, Massachusetts. One interesting science-related aspect of Maria Mitchell's life is that she discovered a comet in 1847, known as "Miss Mitchell's Comet." She made this remarkable discovery using a telescope, becoming the first American woman to do so.

Apart from her contributions to astronomy, Maria Mitchell was also an advocate for women's rights and education. She was actively involved in promoting equal educational opportunities for women, serving as the first female professor at Vassar College in Poughkeepsie, New York. Her appointment at Vassar College marked a significant milestone in women's education, as it was the first women's college in the United States to offer astronomy as a course.

Maria Mitchell's most significant scientific contribution was her pioneering work in the field of celestial navigation. She meticulously observed and recorded the positions of celestial objects, such as stars and comets, and used her data to create accurate charts for navigators. Her work greatly improved the accuracy of celestial navigation, enabling safer and more efficient maritime travel. In recognition of her accomplishments, Maria Mitchell received numerous honors and accolades during her lifetime. She became the first woman elected to the American Academy of Arts and Sciences in 1848, and she was also elected as the first female member of the American Association for the Advancement of Science in 1850.Overall, Maria Mitchell's groundbreaking discoveries, her advocacy for women's education, and her advancements in celestial navigation solidified her as a prominent figure in the field of astronomy and a trailblazer for women in science.

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27. The energy , in electronvolts, of an emitted photon when an electron transition from n=3 to n = 2 is  -1.89 eV.

28. The energy of this emitted photon in joules is -3.0278 x 10⁻¹⁹ Joules.

29. The frequency of the emitted photon is 4.572 x 10¹⁴ Hz.

30. The color of light associated with this photon is Red.

It is the number of oscillations per second of the sinusoidal wave.

Given is the Great Nebula in the constellation Orion consists primarily of excited hydrogen gas.

The electrons in the atoms of excited hydrogen have been raised to higher energy levels. When these atoms release energy, a frequent electron transition is from the excited n = 3 energy level to the n = 2 energy level, which gives the nebula one of its characteristic colors.

27. The energy of transition between n = 3 to n = 2 is

E = R h e (1/n₁² - 1/n₂²)    

where R = Rydberg constant and h = Planck's constant.

Substitute the values, we get

E = 1.0974 x 10⁻⁷ x 6.626 x 10⁻³⁴ x 1.6 x 10⁻¹⁹ (1/3² - 1 /2²)

E = -1.89 eV

28. Energy in joules can be obtained by multiplying  1.6 x 10⁻¹⁹ . So we have

E =  -1.89 eV x   1.6 x 10⁻¹⁹ J/eV

E =  -3.0278 x 10⁻¹⁹ Joules

29. Wavelength associated with the photon emitted is

1/λ = R (1/n₂² - 1/n₁² )

Substitute the values, we get

1/ λ  = 1.524 x 10⁶ /m

The frequency is related to the wavelength as

f = c/λ   where c = speed of light

f = 3 x 10⁸ x  1.524 x 10⁶

f = 4.572 x 10¹⁴ Hz

30. The color of light associated with the photon of calculated frequency is Red.

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The magnitude of the Gravitational Force between the Sun and The earth is nearly 3.557 x 10²² Newtons.

The total gravitational force between two objects is given by the formula,

F = GMm/R²

G is the universal gravitational constant and it's value is 6.67408x10⁻¹¹

M is the mass of one body,

m is the mass of the other body,

R is the centre to centre distance between the two objects,

Here,

Mass of sun is 1.989x10³⁰ kg and the mass of earth is 5.974x10²⁴.

The centre to centre distance R of sun and earth  = (Radius of earth + distance between the sun's centre and earth's surface)

So,

R = (1.49x10¹¹ + 6.378x10⁶)m

Now, putting all the values in the formula,

F = (6.67408x10⁻¹¹)(1.989x10³⁰)(5.974x10²⁴)/(1.49x10¹¹ + 6.378x10⁶)²

Solving further,

F = 3.557 x 10²²N

So, the gravitational force between sun and earth is 3.557 x 10²²N.

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Explanation:

h(t) = -16t²+vt+h

v=initial velocity

h=initial height

h(t) = -16t²+104t+0 because the ball is thrown upward from the ground

t = -104/2(-16)

t = -104/-32

t = 3.25 seconds is when it reaches its maximum height

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c) Superior and inferior portions.

The body's upper (superior) or lower (inferior) halves are separated by the transverse plane, also known as the axial plane.This plane is where rotational or horizontal movements take place, such as:Rotation: turning the torso or even a limb about its axis of rotation.

Transverse plane: A horizontal slit that divides the specimen's top and bottom.additionally called a cross-sectional plane.The left and right halves of the specimen are divided by a vertical cut made along the specimen's exact center line, or midsagittal plane.

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Answer:

Do u want to talk?

Explanation:

Answer:

You found answer yet?

Explanation:

The Drake equation's overall value of 0.1 indicates that one in ten galaxies in the cosmos is home to intelligent life.

The Drake Equation is an effort to include all the factors that would be significant in determining the number of sentient civilizations that were sending radio signals at this specific moment in the Milky Way galaxy. There are seven terms in the Drake Equation. The last component determines how long each civilization lasts on average as a transmitting civilization. The previous six terms are used to calculate the pace at which intelligent civilizations are developing. It is important to emphasize that the Drake Equation only applies to advanced civilizations found inside the Milky Way galaxy. Since they are too far away to be able to hear their radio waves, it does not apply to civilizations in other galaxies.

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-An increase in human population negatively impacts the water resources. There is only a small amount of clean and drinkable water on Earth. If more people are on Earth, more of this water will be used by the population. An increase of people also means that more fossil fuel will be used. An increase of usage of fossil fuel, means that the climate will become warmer & melt the ice caps. Ice caps are pure,drinkable water, and if they melt they will mix with salt water, making it undrinkable to human.

-The industrial usage of water, leads to more water being polluted. Hyrdaulic Fracturing on water will negatively affect water,making it undrinkable,due to the fact that it is filled with things that have negative affects on our body. Infected waters will lead to a smaller amount of water for people to drink.

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Answer:

Many people believe that the temperature changes because the Earth is closer to the sun in summer and farther from the sun in winter. In fact, the Earth is farthest from the sun in July and is closest to the sun in January!

Explanation:

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The hydro power plant consists of a (artificial) dam that builds gravitational potential energy, P.E. from natural flowing water sources, by locating the dam along the water path. The stored potential energy, P. is converted into kinetic energy, K.E. as the water falls from the dam, down to the turbines, located at a much lower level according to the following principle of conservation of energy equation;

Total Mechanical Energy, M.E. = The potential energy of the water, P.E. + The kinetic energy of the water, K.E. = Constant

M.E. = P.E. + K.E. = Constant

Where;

P.E. = m·g·h

K.E. = (1/2)·m·v²

m = Mass

g = The acceleration due to gravity

h = The height of the dam

v = The velocity

The charts can be explained as follows;

Given that the potential energy P.E. = m·g·h, we have that the potential energy is directly proportional to the height of the dam, and therefore, at mid height, the potential energy would be half the maximum value, and we have;

At mid height, P.E. = (1/2)·\(\mathbf{P.E._{max}}\)

At the top of the dam, the (vertical) velocity of the water = 0, therefore, the kinetic energy = 0

Therefore, at the top of the dam, we get;

M.E. = \(P.E._{max}\) + 0 =

M.E. = \(\mathbf{P.E._{max}}\)

Similarly, at the bottom of the dam, the height, h = 0, therefore, being proportional to the height, P.E. = 0, and the velocity is maximum, and at the bottom, we have;

M.E. = 0 + \(K.E._{max}\)

The first chart, water is halfway down the dam

At the halfway down therefore, we have;

P.E. = (1/2)·\(\mathbf{P.E._{max}}\)

M.E. = \(P.E._{max}\) = (1/2)·

∴ K.E. = \(P.E._{max}\) - (1/2)·

Therefore the first chart, water is halfway down the dam;

Halfway, K.E. = (1/2)·\(\mathbf{P.E._{max}}\) = P.E.

∴ K.E. = P.E.  as shown on the chart

The second chart, water has reached the turbine

Water reaches the turbine at the bottom, and as explained above, we get;

M.E. = 0 + \(K.E._{max}\)

∴ M.E.≈ \(K.E._{max}\)

Therefore, when water has reached the turbine at the bottom of the dam, the kinetic energy is approximately proportional to the total mechanical energy as shown in the chart

The third chart, water is at the top of the dam

Here as shown above, we have;

The total mechanical energy, M.E. ≈ \(\mathbf{P.E._{max}}\) as shown on the chart

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If you were to speak on Mars, your voice would sound different due to the atmospheric differences between Mars and Earth. Option (C)

Mars has a much thinner atmosphere than Earth, which means that sound waves would travel differently. The sound waves would be less dense and travel slower, resulting in a lower frequency and longer wavelength. This would make your voice sound deeper and lower in tone. However, the exact effect on your voice would depend on the specific atmospheric conditions at the time and location of your speech. So the correct answer is option c: Your voice would be much lower in tone.

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The kcat for the reaction of the enzyme at pH 4.5 when no chloride is added and compound 3 is the substrate is 2.5E-2 s^-1. This value is calculated using the formula Kcat = Vmax / [E], where Vmax is the maximum velocity of the reaction, and [E] is the concentration of the enzyme.

In this experiment, the concentration of the enzyme is 5.0 uM, and the rate of product formation for compound 3 is 125 nM/s. As the rate of product formation did not vary over the first 5 minutes, it can be assumed that the enzyme was saturated with substrate. Using this information, the kcat can be calculated as:

Kcat = Vmax / [E]

= 125 nM/s / (5.0 uM)

= 2.5E-2 s^-1

Therefore, the kcat for the reaction at pH 4.5 when no chloride is added and compound 3 is the substrate is 2.5E-2 s^-1.

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Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm. It multiplies force. ... It does not multiply force but changes the direction of force.

The frequency of radiation is inversely proportional to the wavelength. The wavelength of the light with the frequency 9.3 × 10¹⁸ Hz is 3.22 × 10³⁷ pm.

The number of oscillations or repeats of a cycle is defined as the frequency of light. All light waves travels at the same speed no matter its frequency. The light with a smaller frequency has a longer wavelength.

The equation connecting the frequency and wavelength of the light is given as:

c = νλ

ν - Frequency of radiation

λ - Wavelength of radiation

λ = 3.00 × 10⁸ / 9.3 × 10¹⁸

= 3.22 × 10²⁵ m

1 pm = 10⁻¹² m

So 3.22 × 10²⁵ m = 3.22 × 10²⁵ / 10⁻¹²

λ =  3.22 × 10³⁷ pm

Thus the wavelength of light is 3.22 × 10³⁷ pm.

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Answer:

Explanation:

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. However, there has never been an experiment able to capture both natures of light at the same time; the closest we have come is seeing either wave or particle, but always at different times.When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles

Why is light considered a wave and a particle?

Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed

The momentum and direction of the third piece with respect to the 100 g piece is 0.11 kgm/s at 11 degrees.

The momentum and direction of the third piece with respect to the 100 g mass is determined by applying the principle of conservation of linear momentum.

Pi = Pf

where;

0 = P₁ + P₂ + P₃

where;

-P₃ = P₁ + P₂

-P₃x = P₁cosθ + P₂Cosθ  --(1)

-P₃y =  P₁sinθ + P₂sinθ  --(2)

-P₃x = (0.1 x 1.2 x cos0) + (0.03 x 0.8 x cos120)

-P₃x = 0.12 - 0.012

-P₃x = 0.108 kgm/s

P₃x = -0.108 kgm/s

-P₃y =   (0.1 x 1.2 x sin0) + (0.03 x 0.8 x sin120)

-P₃y =  0.0208 kgm/s

P₃y =  -0.0208 kgm/s

\(P_3 = \sqrt{P_3x^2 + P_3y^2} \\\\P_3 = \sqrt{(-0.108)^2 + (-0.0208)^2} \\\\P_3 = 0.11 \ kgm/s\)

\(tan \ \theta = \frac{P_3y}{P_3x} \\\\\theta = tan^{-1} (\frac{P_3y}{P_3x} )\\\\\theta = tan^{-1} (\frac{-0.0208}{-0.108} )\\\\\theta = 11\ ^0\)

with respect to 100 g, direction of third piece is 11⁰

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The  correct  processes based on the type of energy transfer they involve can be linked as ;

Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection.

The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.

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Answer: hey, i hope this hlps!~~~ Part of mental health is how well your mind processes and understands information and experiences. In contrast, emotional health involves your ability to manage and express the emotions that arise from what you have learned and experienced.

Explanation:

Answer:

1) Animals form groups to increase their chance of survival.

2) Animals stay in groups because it makes hunting for food easier.

3) Animals can protect their young ones much easier.

Explanation: Hope it helps you :)))))

have a good day

Given,

On simplifying,

Thus,

Or

Thus, x=9 and x=-15

Therefore the correct answer is the third option

Answer:

Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between your finger and a ground light switch plate. ... Most electric charge is carried by the electrons and protons within an atom.

Explanation:

because it is