which of the following best describes each particle?
A. Protons are negative, neutrons are neutral, and electrons are positive.
B. Protons are neutral, neutrons are positive, and electrons are negative.
C. Protons are positive, neutrons are neutral, and electrons are negative.
D. Protons are neutral, neutrons are negative, and electrons are positive.

Answer:

C. The light appears brighter

Explanation:

As the amplitude of a light wave increases, the light appears brighter.

The amplitude is the vertical distance from the axis of the sinusoidal wave at a particular time.

When the amplitude of a wave is increased, its energy is increased. Energy of the wave is directly proportional to the square of the amplitude. Energy is actually the intensity of the wave.

Thus, as the amplitude of a light wave increases, the light appears brighter.

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Answer:

1.8m/s

Explanation:

We know that the momentum of an impact of a body is the mass times he velocity

M= mv

Given data

Mass m= 10kg

Momentum M= 18 kg.m/s

Velocity v=?

We can solve for velocity by submitting our given data in the momentum equation

18 = 10*v

v= 18/10

v= 1.8m/s

Answer: 1.8m/s

Explanation: bigger brain

The energy of a sound wave as it travels through a medium decreases

It is the physical vibration waves that travel through the air to reach the ears . Sound energy is the result when force makes an object vibrate.

A wave can lose energy as it travel through a medium because medium can also absorb the energy . The medium changes some of the acoustic energy of the sound wave into heat .

correct option is d) it decreases

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The energy of a sound wave decreases as it propagates through a medium due to damping, which lessens the amplitude of the wave. The decrease happens because the energy is dispersed over a growing area and is absorbed by the medium.

The question asks which best describes the energy of a sound wave as it travels through a medium. The correct answer is that the energy of a sound wave decreases as it propagates through a medium. This decrease in energy is due to damping, which is an effect that decreases the amplitude of the wave as it travels. Damping occurs because the energy of the sound wave is spread out over an increasingly larger area and is absorbed by the medium.

Answer:

the acceleration is 130.3m/s²

Explanation:

Given data

Force F= 18.9N

Mass of ball m= 0.145kg

Acceleration a=?

Applying the Newton's second law of motion

"The rate of change of momentum of a body is proportional to the external force".

F=ma

a= F/m

a= 18.9/0.142

a= 130.3m/s²

The acceleration of the baseball is 130.35 [tex]m/s^2[/tex].

Given the following data:

To find the acceleration of the baseball, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

[tex]Acceleration = \frac{Force}{Mass}[/tex]

Substituting the given values, we have;

[tex]Acceleration = \frac{18.9}{0.145}[/tex]

Acceleration = 130.35 [tex]m/s^2[/tex]

Therefore, the acceleration of the baseball is 130.35 [tex]m/s^2[/tex].

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Answer:

It contracts and returns to its original length when it stops.

Explanation:

As it approaches the speed of light, the length of the object is observed to contract. Then as it comes to a stop, it returns back to its original length.

Answer:D

Explanation:

Because I got it wrong

The Answer is:

Weight

(hope that helped)

Answer:

Earth’s gravity causes the downward pull on the washers.

Explanation:

This is the sample answer on Edmentum. :)

Answer:

a) developed

b) simple

c) simple

d) developed

e) developed

f) developed

Question:

Which of the following sentences are simple sentences and which are developed sentences? Orally argue the answers

a) the cat scribbled the little girl.

b) Grandma will cook

c) The cat will spin

d) You don't love cats?

e) in one jump, the cat will be at the window

f) we will never arrived on time

Explanation:

To differentiate the simple sentences from the developed sentences, let's understand what they are.

A Simple sentence is a sentence that contain a subject and a predicate. The sentence is complete in thought.

A developed sentence is a sentence that contain a subject, predicate as well as other parts of sentence.

a) the cat scribbled the little girl (developed)

b) Grandma will cook (simple)

c) The cat will spin (simple)

d) You don't love cats? (developed)

e) in one jump, the cat will be at the window (developed)

f) we will never arrived on time (developed)

Hence option b and c are simple sentences, while options a, d, e and f are developed.

Answer:

What speed is the car traveling at the longest distance and the shortest distance, and how do they compare?"

"Does the car move faster or slower for longer distances?

Explanation:

Hope it helps! :)

The experiment aims to examine how the force exerted on the cart does work as the cart moves through a distance by using various materials and equipment.

The general scientific question that can be answered by conducting this experiment is: How does the force exerted on the cart do work as the cart moves through a distance?

In this experiment, you can examine the relationship between force, work, and distance by using a cart track, two carts, several masses, a position-sensing pulley, and a rough surface. By varying the force exerted on the cart and measuring the work done as the cart moves through a distance, you can analyze how force affects the work done on the cart.

An example of how to design this experiment would involve measuring the force using the masses and the position-sensing pulley. By increasing the mass and measuring the displacement of the cart, you can determine how the force applied affects the work done.

Answer:

a) [tex]U_{g} = 40\,J[/tex], b) [tex]\eta = 70\,\%[/tex], c) [tex]v = 20\,\frac{m}{s}[/tex]

Explanation:

a) The initial potential energy is:

[tex]U_{g} = (0.2\,kg)\cdot \left(10\,\frac{m}{s^{2}} \right)\cdot (20\,m)[/tex]

[tex]U_{g} = 40\,J[/tex]

b) The efficiency of the bounce is:

[tex]\eta = \left(\frac{14\,m}{20\,m} \right)\times 100\,\%[/tex]

[tex]\eta = 70\,\%[/tex]

c) The final speed of Danielle right before reaching the bottom of the hill is determined from the Principle of Energy Conservation:

[tex]K = U_{g}[/tex]

[tex]U_{g} = \frac{1}{2}\cdot m \cdot v^{2}[/tex]

[tex]v = \sqrt{\frac{2\cdot U_{g}}{m} }[/tex]

[tex]v = \sqrt{\frac{2\cdot (40\,J)}{0.2\,kg} }[/tex]

[tex]v = 20\,\frac{m}{s}[/tex]

Answer:

D they both have rocky surfaces

The earth and mars are similar to each other because both the planets have rocky surfaces. Thus, the correct option is D.

Earth and Mars are similar when it comes to their basic makeups, however it has been given that they are both the terrestrial type of planets. Earth and mars, both are differentiated between a dense metallic core and an overlying mantle and crust which are composed of less dense materials like silicate rocks.

Mars is about the half the size of the Earth by diameter and has a much thinner atmosphere, with an atmospheric volume which is less than 1% of the volume of the Earth. The atmospheric composition of the two planets are also significantly different because primarily they are carbon dioxide-based, while the Earth's is rich in nitrogen and oxygen gases.

Therefore, the correct option is D.

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Answer:

It is done via an electromagnetic wave.

Explanation:

Answer:

The net force in the middle particle is zero, and it has no direction.

Explanation:

First, the force that one charge does in other charge is:

F = K*q1*q2/r^2

where k is a constant, q1 and q2 are the charges, and r is the distance between the charges.

If the force is positive, the force is repulsive (pushes away the charge) if the force is negative, is attractive.

Now, we have that the middle charge has a charge of 4.00nC, and in each side at a distance of 4m, has a charge of 4.00nC.

i will write qL as the charge in the left, qR as the charge in the right, and qM as the charge in the middle.

The force that the charge in the right does to the charge in the middle is:

Fr = (k*(4.00nC)^2)/4m^2 = k*(nC/m)^2

And is positive, so this is a repulsive force, this means that if the charge is at the right of the middle charge, then this force pushes the middle charge to the left.

For the left charge we have the same:

Fl = (k*(4.00nC)^2)/4m^2 = k*(nC/m)^2

But in this case, the force pushes the particle to the right, then this force, that is equal in magnitude to the previous force, pushes it in the opposite direction, then the total force in the middle particle is anulated. This is because the two external particles are "pushing" the middle particle with the same force and in the opposite direction.

The net force in the middle particle is zero, and it has no direction.

[tex]F = K*q_1*q_2/r^2[/tex]

where,

k is a constant,

q1 and q2 are the charges, and

r is the distance between the charges.

If the force is positive, the force is repulsive (pushes away the charge) if the force is negative, is attractive.

Given :

Charge = 4.00nC

Distance = 4.00m

The force that the charge in the right does to the charge in the middle is:

[tex]F_r = (k*(4.00nC)^2)/4m^2\\\\F_r = k*(nC/m)^2[/tex]

And is positive, so that is a repulsive pressure, because of this if the charge is on the proper of the center fee, then this pressure pushes the center fee to the left.

For the left charge we have the same:

[tex]F_l = (k*(4.00nC)^2)/4m^2 \\\\F_l = k*(nC/m)^2[/tex]

But on this case, the pressure pushes the particle to the right, then this pressure, this is same in importance to the preceding pressure, pushes it within side the contrary direction, then the entire pressure within side the center particle is annulated. This is due to the fact the 2 outside debris are "pushing" the center particle with the identical pressure and within side the contrary direction.

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Answer:

Electromagnets.

Explanation:

They acquire their magnetism by flow of current and electromagnetic induction

The kind of magnet that should be shown in the figure is electromagnet.

An electromagnet refer to the type of magnet where the magnetic field is generated via an electric current. It comprise of wire wound into a coil. A current via the wire develops a magnetic field i.e. concentrated in the hole, represents the center of the coil. Also, it acquire their magnetism with the help of flow of current and electromagnetic induction.

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Answer:

Explanation:

We shall apply law of refraction which is as follows

sin i / sinr = μ  , where i is angle of incidence , r is angle of refraction and μ is refractive index

here i = θa = 22.5°

r = θb

μ  = 1.77

sin22.5 / sinθb = 1.77

.3826 / sinθb = 1.77

sinθb = .216

θb  = 12.5 °.

Answer:

C) 4 seconds

Explanation:

The height of an object is given by the following formula:

[tex]s(t)=h+vt-0.5at^2\\\\a=32ft/s[/tex]

To find the flight time you equal the height s to zero:

[tex]0=5ft+70\frac{ft}{s}\ t-0.5(32\frac{ft}{s^2})t^2\\\\0=5ft+70\frac{ft}{s}\ t-16\frac{ft}{s^2}t^2[/tex]

Then, you have a quadratic equation of the form:

[tex]ax^2+bx+c[/tex]

you use the quadratic formula in order to find the roots of the polynomial:

[tex]t_{1,2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\a=-16\\\\b=70\\\\c=5\\\\t_{1,2}=\frac{-70\pm \sqrt{(70)^2-4(-16)(5)}}{2(-16)}\\\\t_{1,2}=\frac{-70\pm 72.24}{-32}\\\\t_1=4.44s\approx4s\\\\t_2=-007s[/tex]

you take the positive value of t because this has physical meaning.

Hence:

the time is C) 4 seconds

From the data provided, the time taken for the baseball to hit the ground is 4.0 seconds

The function: s(t) = vt + h – 0.5at^2 represents the height of an object

From the data provided:

Substituting the values:

0 = 70t + 5 - 0.5(32)t^2

16t^2 -+ 70t - 5 = 0

solving quadratically:

[tex]t = \frac{ - b \sqrt{b {}^{2} - 4ac} }{2a} [/tex]

[tex]t = \frac{ - 70 \sqrt{ {70}^{2} - 4 \times ( - 16) \times 5} }{2 \times ( - 16)} [/tex]

t = 4.4 s or - 0.07

taking only positive values for t, t= 4 seconds

Therefore, the time taken for the baseball to hit the ground is 4.0 seconds.

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Astrology is a belief system which posits that the positions and movements of celestial bodies (the Sun, Moon, and planets) can influence human affairs and natural phenomena. Astrological practices involve the creation of horoscopes, which are detailed charts calculated based on the exact time, date, and location of an individual's birth, with the intention of gaining insight into personality traits, relationships, and life events.

The origins of astrology are rooted in ancient civilizations and can be traced back thousands of years. Early forms of astrology were used by the Babylonians as a method for predicting seasonal shifts and interpreting celestial cycles as omens. Horoscopes, central to natal astrology, detail the positions of the planets within the zodiac at the moment of one's birth, aiming to provide guidance or predictions. Critiques of astrology as a scientific practice point to a lack of empirical evidence and reproducibility, the Forer effect (subjects giving high accuracy ratings to vague and general personality descriptions), and the logical inconsistencies within astrological traditions which discredit its validity as a science.

Answer:

[tex]n=5[/tex]

Explanation:

The De Broglie equation is given by:

[tex]\lambda=\frac{h}{mv}[/tex]

Where:

Then:

[tex]v=\frac{h}{m\lambda}[/tex] (1)

The  energy equation of a hydrogen electron in a orbit n is:

[tex]E=-\frac{R_{H}}{n^{2}}[/tex] (2)

We can write E as a kinetic energy an use v of the equation (1)

[tex]\frac{1}{2}mv^{2}=\frac{R_{H}}{n^{2}}[/tex]

[tex]n^{2}=\frac{2R_{H}}{mv^{2}}[/tex]        

[tex]n=\frac{m\lambda}{h}\sqrt{\frac{2R_{H}}{m}}[/tex]      

[tex]n=\frac{9.1*10^{-31}*1.66*10^{-9}}{6.626*10^{-34}}\sqrt{\frac{2*2.18*10^{-18}}{9.1*10^{-31}}}[/tex]  

[tex]n=5[/tex]

I hope it helps you!

Given an electron in a hydrogen atom with a de Broglie wavelength of 1.66 nm, the quantum number or integer n that corresponds to its orbit is likely 1, suggesting the electron is in the ground state orbit of the atom.

Given the de Broglie wavelength (λ) of an electron in a hydrogen atom is 1.66 nm, we're to identify the integer n or quantum number that corresponds to its orbit. Specifically in the model of the atom proposed by Bohr and later modified by de Broglie, the electron orbits the nucleus in quantized orbits. These quantized orbits correspond to the de Broglie 'standing wave' concept where an integer number of wavelengths must fit exactly within the orbit.

To determine the quantum number n for the electron's orbit, we need to apply the formula for the de Broglie wavelength in a Bohr orbit: λ = 2πrn/n, where rn is the radius of the nth orbit. The radius of the nth orbit in a hydrogen atom is given by the formula rn = 0.529 * n² nm. Solving for n, we find n equals to approximately 1. This means the electron is likely in the ground state orbit of the hydrogen atom.

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Answer:

Decreased, The Same, 2.5 and .25

Explanation:

Answer:

I'll just assume that the question is what's the velocity of the airplane before it takes off because you haven't included a question. Where u: velocity, a: acceleration, t: time

[tex]u = a \times t \\ u = 2.5 \times 30 \\ u = 70ms[/tex]

Answer: [A] "by adding potential energy and kinetic energy"

Explanation: Mechanical Energy = Potential Energy + Kinetic Energy

Answer: d

Explanation:

The correct option is "work function of the photoemissive metal". The threshold frequency in a photoelectric effect experiment is most closely related to the work function of the photoemissive metal, which is the amount of energy required to eject an electron from the metal's surface.

The threshold frequency in a photoelectric experiment is closely related to the work function of the photoemissive metal (Option B). The threshold frequency is a characteristic of a metal and represents the minimum frequency of incident light required to eject electrons from the metal surface. If the frequency of the incident light is below this threshold, no photoelectrons are ejected regardless of the light's intensity or any other factors, such as the area or thickness of the metal.

In the case of using a metal with a lower threshold frequency (Option 3), this would correspond to a photoemissive metal with a lower work function, allowing electrons to be ejected with lower frequency (and thus, less energetic) light. Conversely, if a metal with a higher work function is used (Option 4), photons with energy less than this work function would not eject electrons, as their energy would be insufficient to overcome the electron binding energy inherent to the metal.

A heat engine is a device that uses heat to produce useful work.

Answer:

Heat

Explanation:

Answer:

diffraction

Explanation:

Answer:

Just as the angles of the sun, moon and Earth affect tidal heights over the course of a lunar month, so do their distances to one another. Because the moon follows an elliptical path around the Earth, the distance between them varies by about 31,000 miles over the course of a month.

Hope this helped, have a nice rest of your day!

Genotypes describe the specific genetic makeup of a living thing and cannot be observed.

Genotypes represent the combination of alleles or genes that an organism possesses for a particular trait or set of traits. They are responsible for determining the inherited characteristics and potential traits that an organism can exhibit.

They can vary for different traits within an individual organism or across different individuals within a species. They play a fundamental role in genetics and inheritance, as they determine the genetic information that is passed from one generation to the next.

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Question:

What are the magnitudes of the  pulling force and the magnetic field

Answer:

The magnetic field strength is 2.7 T

The pulling force [tex]F_p[/tex] is 0.975 N

Explanation:

Here we have;

Length of wire, l = 10.0 cm = 0.1 m

Resistance of wire, R = 0.300 Ω

Speed of wire, v = 4.00 m/s

Power dissipated = 3.90 W

Based on the given data, we apply the relation;

[tex]I =\frac{Blv}{R}[/tex]..............(1)

Where:

B = Magnetic field strength

I = Current

Since P = I²R, we have;

3.9 = I²·0.300Ω

∴ I² = 3.9/0.300 = 13

From which I = √13

Substituting the value of I in equation (1) above, we have;

[tex]\sqrt{13}= \frac{B \times 10.0 \times 4.00}{0.300}[/tex]

Therefore;

[tex]B = \frac{\sqrt{13} \times 0.300}{0.1 \times 4.00} = 2.70416 \ T\approx 2.7 \ T[/tex]

The magnitude of the pulling force is given by the following relation;

[tex]F_p = F_m = IlB = l\sqrt{\frac{P}{R} } \frac{\sqrt{PR} }{lv} =\frac{P}{v} = \frac{3.9 \ W}{4.00 \ m/s} = 0.975 \ N[/tex]

The pulling force [tex]F_p[/tex] = 0.975 N.

Answer:

The correct option is;

C. 1,715 m

Explanation:

We are given the information from the group of teen at the City edge

Time of arrival of explosion sound = 5 s after sighting

Time of sighting explosion = 5 s before hearing the boom

Speed of sound in air ≈ 343 m/s

Speed of light = 299,792 km/s

Therefore, distance covered by sound in 5 seconds is given by the following equation;

[tex]Speed = \frac{Distance}{Time}[/tex]

[tex]\therefore 343 \ m/s= \frac{Distance}{5 \, s}[/tex]

Hence Distance = 343 m/s × 5 s = 1715 m

To check, we compare the time it would take for the light to cover 1715 m

That is [tex]Time = \frac{Distance}{Speed} = \frac{1715}{299,792,000} = 0.00000572 \, s[/tex] which is instantaneous hence the distance can be approximated by the time duration for the speed of sound.

Therefore, the distance of the students from the factory is approximately 1,715 m

Using the speed of sound at 24.0°C, which is roughly 343 m/s, and knowing the sound took 5 seconds to reach the observers, the calculated distance to the explosion is 1715 meters.

The question involves calculating the distance from an observed event based on the speed of sound, which falls under the subject of Physics. To determine how far the teens are from the factory, we can use the speed of sound, which depends on air temperature. Given the standard temperature of 24.0°C, the speed of sound in air is approximately 343 meters per second. The explosion sound reached the teens 5 seconds after they saw it, meaning the sound traveled for 5 seconds to reach them.

The distance can be calculated using the formula: distance = speed x time. Plugging in the values: distance = 343 m/s x 5 s = 1715 meters. Therefore, the teens were approximately 1715 meters away from the factory when they heard the explosion.