Which three statements about electromagnetic radiation are true?

Answer:

A) Alpha particle

Explanation:

An alpha particle is identical to a helium nucleus, since consists of 2 protons and 2 neutrons.

The charge of an alpha particle is +2e and its mass is 4 a.m.u.

Alpha particles are produced in alpha decays. Alpha decays occur when a nucleus emits an alpha particle: as a result, the atomic number of the nucleus decreases by 2 units, while its mass number decays by 4 units.

The equation that represents an alpha decay is

[tex]_Z^AX \rightarrow _{Z-2}^{A-4}Y+_2^4 \alpha[/tex]

Answer

Hello,

This is a double replacement reaction.

Explanation

A double replacement reaction occurs wherein the two principle reactants exchange after reaction. In this example, Cl will combine to K to form KCl and H will add to OH to form H2O.The cations and anions switch between the reactants to produce new products.

Wish you Luck!

One

d = 400 m

t =   20 s

speed = ?

speed = 400 / 20

speed = 20 meters/second

Two

d = 50 meters

t =  10 seconds

speed = 50 meters / 10 seconds

speed = 5 meters / second

c the objects particles move faster

Answer: c.The object’s particles move faster

Explanation:

When the temperature of an object increases, the particles of that object gain kinetic energy and move faster.

Kinetic energy is related to motion. If an object has multiple particles, as faster they move, they will collision with each other.

So, the speed of the particles is related to the temperature. (And also the mass of the particle)

A is the correct answer

Answer:

B. 14

Explanation:

For an element:

- Atomic number: is the number of protons in the nucleus (p)

- Mass number: it is the number of protons (p) + neutrons (n) in the nucleus

For Al (aluminium), we have:

p = 13

p + n = 27

Substituting the first equation into the second one, we find the number of neutrons:

n = 27 - p = 27 - 13 = 14

Answer:

14

Explanation:

plato

it will weigh less on the moon.

ANY object will weigh  83% less on the Moon than weighs on Earth.

Your 10kg rock weighs  98N (22.4 lbs)  on Earth and  16N (3.6 lbs)  on the Moon.

Answer:

[tex]1.66\cdot 10^5 Pa[/tex]

Explanation:

The ideal gas equation states that:

[tex]pV=nRT[/tex]

where

p is the gas pressure

V is the gas volume

n is the number of moles of the gas

R is the gas constant

T is the absolute temperature of the gas

For the gas in this problem, we have:

[tex]n = 3 mol[/tex] (number of moles)

[tex]V=60 L=60\cdot 10^{-3} m^3[/tex] (gas volume)

[tex]T=400 K[/tex]

So we can solve the formula for p, the pressure of the gas:

[tex]p=\frac{nRT}{V}=\frac{(3 mol)(8.314 J/mol K)(400 K)}{60\cdot 10^{-3} m^3}=1.66\cdot 10^5 Pa[/tex]

Neglecting losses in a transformer, it's input and output power are equal. (C)

The input power in the transformer are equal to the output power of a transformer.

Answer : Option C

Explanation:

The transformers have power on either side as input or output to be constant. This is so because the transformers are the electrical device which transfer the energy between the circuits. There are two types of transformers, step up transformers and step down transformers.

Both follows the following expression of power = voltage x current. According to the type of transformer, the turns of wire and voltage and current are kept varying but the power remains constant.

Velocity = (displacement) / (time)

Displacement = straight-line distance between start-point and end-point

If you stop at the same point you started from, then your displacement for the trip is zero.

The answer is A

Velocity = (displacement) / (time)

Displacement = straight-line distance between start-point and end-point

If you stop at the same point you started from, then

your displacement for the trip is zero, and your average

velocity is also zero.

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According to the Law of Universal Gravitation (applying to all things in the universe, hence "universal"), all objects attract each other through gravitational force. ... As mass increases, gravity increases (related linearly) because there is a stronger attraction between objects with more "stuff" (matter).

Sound waves are longitudinal wave which propagates in form of compression and rarefaction through the medium

As the medium is have compression and rarefaction then we will have few positions in the medium where we have pressure maximum and few points of less pressure.

this pressure difference creates disturbance into our ear drum and this disturbance or this signal is convey to brain as sound.

The transmission of this signal is always in form of electrical signal which are carried by neurons into our brain

Answer:

A. Electrical signal waves

Explanation:

Gamma rays have extremely shorter wavelengths than microwaves and therefore have higher frequencies.

Gamma rays have a higher frequency than microwaves. In the electromagnetic spectrum, the frequency and energy increase from radio waves to gamma rays. Gamma rays are the most energetic, and microwaves are on the lower energy end of the spectrum.

Gamma rays have a higher frequency than microwaves. In the electromagnetic spectrum, frequency and energy increase from radio waves to gamma rays, making gamma rays the most energetic form of electromagnetic waves. Simply put, gamma rays' frequency is higher and their wavelength is shorter than microwaves.

Microwaves are on the lower energy end of the spectrum, used in applications such as cooking and telecommunications. They have a frequency ranging from about 10⁹ Hz to 10¹² Hz.

Shortly, gamma rays are nuclear in origin and encompass the highest-frequency electromagnetic radiation of any type, meaning they have a higher frequency than microwaves.

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It should be the first answer. I'm sorry if it's wrong

Coal production is costly because coal is found deep underground, necessitating expensive mining operations. Corrent answers are 1.coal is found deep underground, 2. Coal is expensive to make and  3. Coal is only found in certain places on earth.

Coal production is costly primarily because coal is found deep underground. This necessitates extensive and expensive mining operations to extract the coal.

There are two main methods of coal mining:

Furthermore, transporting the mined coal to power plants or industrial sites adds to the cost. Lastly, coal processing, which involves cleaning and removing impurities, adds another layer of expense.

Corrent answers are 1.coal is found deep underground, 2. Coal is expensive to make and  3. Coal is only found in certain places on earth.

Based on the information in the question, a light year is the distance traveled light in one year. Then if the light from the star Centauri takes 4.2 years to reach the earth, then its distance from earth is 4.2 light years.

Answer:

The correct choice is

A. 4.2 light years

Explanation:

v = speed of light = 300,000 km/s

t = time taken for the light to travel from Proxima centauri to earth = 4.2 years

d = distance traveled by light in 1 year = 1 light year

So

distance in 1 year = 1 light year

distance in 4.2 year = 4.2 light year

Hence

distance of star Proxima Centauri from earth = 4.2 light year

The theory is A. continental drift.

The lithosphere which is the outermost layer of the planet is broken into pieces called tectonic plates. In this scientific theory called plate tectonics, seven large and greater number of small plates are broken and moved separately. This theory is based on the concept of continental drift.  

In the geologic time, continents shift their position from the earth's surface. Similar fossils found on different continent's shores prove us that the continental drift is nothing but truth.

Answer:

The windowpanes are- transparent.

The color of the panes are due to the wavelengths of light that the glass- allows to pass through

Explanation:

Just answered the question.

Answer:

The two answers are:

Explanation:

1) transparent

2) allows to pass through

I also just did this question. No lie. I hope this helps!

- sincerelynini

-45N because you add the side together and make it equal 0

Kiley and Germaine pull together, resulting in a force of 45N which pulls the rope that way ===> .

In order to balance the forces on the rope, Gunther must pull the rope with a force of 45N this way  <===, all by himself.

The net force on the rope will then be zero, and the rope will not accelerate.  (Although the tension inside the rope will be 90N.)

By the way . . . I'd love to see how the kids manage to all get on the "sides" of the rope.  I would have expected them to just do it the easy way and stand at the "ends" of the rope.

I think the true option is "The sun uses its own matter to create light and heat."

Answer:

 - The sun uses its own matter to create light and heat.          

Explanation:

Sun is composed of gases majorly Hydrogen and Helium. In the core, the hydrogen atoms fuse to form helium atoms. This nuclear fusion reaction in the core produces huge amount of energy in the form of heat and light.

Thus, the statement that sun uses its own matter to create light and heat is true.

Sun is a G2 star. It is not a rare star. It is appears extremely bright because it is closer to earth. Else, it has a average brightness.

When we look at the sun, we actually view the photosphere. chromosphere is only visible during a total solar eclipse.

The sun would eventually die and in this process, it would become red giant expand and engulf the earth. Finally its core would form a white dwarf.

Final answer:

Builders should be concerned about erosion, mass wasting, and slope instability when constructing homes on cliffs, with particular risks including landslides and tsunamis arising from geological vulnerabilities and ocean dynamics.

Explanation:

The builder of a house on a cliff overlooking the ocean should be concerned about geologic phenomena such as erosion and mass wasting processes. Ocean waves incessantly weather away at the land, creating sea cliffs that become prime areas for concerns about stability. Particularly, the undercutting action of the sea can lead to portions of the cliff collapsing, and additional mass wasting can occur as higher rocks calve off. Notably, the construction of buildings on steep slopes can influence nearby slope instability due to changes in drainage, which further compounds these concerns.

Geologic factors such as rock bedding, fracturing, and foliation are structural weaknesses that can be exacerbated by this process, increasing the risk of landslides. Furthermore, when building in coastal areas, one must also consider the potential risk from tsunamis, such as the hypothesized collapse of volcanic island slopes that could generate massive waves. Thus, attention to elements like coastal erosion, wave-cut platforms, and tectonic activity is crucial during the planning and building phase to mitigate potential disasters.

Answer:

correct order of work done is given as

2 > 3 > 4 > 1

Explanation:

When positive charge is dragged opposite to electric field then in that case work done is positive while if negative charge is dragged opposite to electric field then the work done is negative

So here we will have

positive work for charge 2, 3 and 4 while for negative charge particle 1 the work done is negative

now here we also know that work done is product of force and displacement

so here work depends on displacement of charge particle

maximum displacement is force particle 2

minimum is for particle 4

so correct order of work done is given as

2 > 3 > 4 > 1

Answer:

2, 3, 4, 1

Explanation:

on edg

Answer: False

Explanation:

Observation is a detailed record of the data obtain after the implementation of the scientific procedure. It does not include the description of the subject as it is already mentioned in the literature review or writing theory or principle of the scientific research or experiment.

If you're referring to this question :

A container of soymilk has the instruction on its label to "shake well before opening." The soymilk is most likely a !suspension!

Suspension is the answer.

Hope this helps,

Davinia.

If I can't open the lid of a jelly jar, I'd keep trying and if I can't open the lid of a jelly jar after the MANY tries I took, I'd ask for help.

Hit in the center of the top, and it will let some air out, that will make it easier.

The horizontal motion has no effect on the vertical drop.

From a drop, the distance the ball falls in 'T' seconds is

D = 4.9 T^2

so

2.2 = 4.9 T^2

T^2 = 2.2/4.9

T^2 = 0.449 sec^2

T = 0.67 second

We have that A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assuming no air resistance will take t to reach the ground

t=0.670sec

From the question we are told that

A ball is thrown horizontally at a height of 2.2 meters

a velocity of 65m/s off a cliff

Generally the equation for the Time is mathematically given as

s=ut+1/2gt^2

Therefore

[tex]2.2=0t+1/2(9.8)t^2\\\\t=\sqrt{\frac{2.2}{0.5*9.8}}\\\\t=0.670sec[/tex]

Therefore

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assuming no air resistance will take t to reach the ground

t=0.670sec

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The large container warms slower than the smaller container because of the amount of space . Both can warm to the same temperature tho just one takes longer than the other . Can I please be marked as brainliest! Have a great day !

The larger container warms up slower than the small one

What does "which" mean ?  Does it mean to pick the right one out of a list that you're hiding from us ?

There's no way we can begin to make a choice if we don't know WHAT the samples are samples OF.

I CAN give you some info, however, that will probably help you make the right choice from the hidden list that you have.

If water is on the list, then that's the answer, EXCEPT if liquid ammonia is on the list.  Liquid ammonia is the only known substance on Earth that beats water as the answer to this question.

If neither liquid ammonia NOR water is on your secret list of samples, then you're on your own, Bunky.

Answer: if you are on usa test prep the answer is aluminum

Explanation:

Explanation:

Given that,

Input force on a simple machine, F = 2 N

The output force on a simple machines, F' = 4 N

The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Mathematically, it is given by :

[tex]m=\dfrac{F'}{F}[/tex]

Putting the value of F and F' in above equation. We get :

[tex]m=\dfrac{4}{2}[/tex]

m = 2

So, the mechanical advantage of the simple machines is 2. Hence, this is the required solution.

Answer:

Mechanical advantage, m = 2

Explanation:

Given that,

The input force on a simple machine, [tex]F_i=2\ N[/tex]

The output force on a simple machine, [tex]F_o=4\ N[/tex]

To find,

The mechanical advantage of the simple machine.

Solution,

The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Its expression is given by the below formula :

[tex]m=\dfrac{F_o}{F_i}[/tex]

[tex]m=\dfrac{4}{2}[/tex]

m = 2

Therefore, the mechanical advantage of the simple machines is 2.

Answer;

The above statement is True

Kinetic friction is affected by the weight of the object.

            F= coefficient of friction * Normal force.

              F = mass* acceleration due to gravity.

Answer:

The answer is True. Friction is indeed affected by weight.

Explanation:

A.) Electromagnetic Current

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