The density of dry air at room temperature and atmospheric pressure Is 1.2 kg m-3. What volume would 6 kg of dry air occupy under these conditions?​

Answer:

4.(615384)Hz

Explanation:

Firstly, let's take a note that the speed of light is much higher than 30m/s, on the other hand visible light has wavelengths measured in nanometers, so I assume we're just supposed to assume the values in the question for the purpose of solving it.

If a wave moves through a point with speed v and has wavelength l, In each second we observe v/l cycles - and cycles per second is the frequency!

F = 30m/s / 6.5m = 4.(615384)/s = 4.(615384)Hz

Explanation:

v=fh, where v is velocity

f is frequency

h is wavelength

hence the frequency=velocity/wavelength

=30/6.5

=4.61Hz

Answer:

Explanation:

Acceleration = (final velocity - initial velocity)  / time

Acceleration of W = ( 91 - 60 ) / 5.38 = 5.76 m /s²

Acceleration of X  = ( 68 - 39  ) / 5.38 = 5.39  m /s²

Acceleration of Y = ( 70 - 42 ) / 5.38 = 5.20 m /s²

Acceleration of W = ( 94 - 65 ) / 5.38 = 5.39  m /s²

So Train Y is the smallest acceleration.

Answer:

It is the length from the midpoint to the crest.

Explanation:

Answer:

Work done = 838470 Joules.

Explanation:

Given the following data;

Power = 19 hp

Time = 1 minute to seconds = 60 seconds.

Next, we would convert the unit of power in "hp" to "Watt."

1 Watt = 0.00135962 horsepower

x Watt = 19 horsepower

Cross-multiplying, we have;

19 = 0.00135962x

x = 19/0.00135962

x = 13974.5 Watts.

Now, to find the work done in moving the mower;

Work done = power * time

Substituting into the formula, we have;

Work done = 13974.5 * 60

Work done = 838470 Joules.

The first three energy level of the electron is E₀= 5.95 × \(10^{-20}\) Joule  E₁ = 1.78 × \(10^{-19}\) Joule E₂ = 2.95  × \(10^{-19}\) Joule respectively.

The electron is a subatomic particle with an electric charge opposite to one elementary charge. Its sign is either e or β. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.

Given: Spring constant (k) = 1.30 n/m,

As we know that the value of the mass of the electron (m) = 9.1 × \(10^{-31}\) kg

Now, The energy level of a particle in harmonic potential is given by

Eₙ = Hω (n + \(\frac{1}{2}\)), where n is the energy level stage and ω is the oscillator frequency,

So for First level energy

E₀ = 1 /2  Hω = 1/2 H \(\sqrt{\frac{k}{m} }\),

E₀ = 1 /2 ×  6.626 × \(10^{-34}\) / 2\(\pi\) ×\(\sqrt{\frac{1.30}{9*10^{-31} } }\)     (H = h/2\(\pi\)), h is planks constant

E₀= 5.95 × \(10^{-20}\) Joule

Similarly ;

E₁ = 3E₀; E₁ = 3 × 5.95 × \(10^{-20}\)

E₁ = 1.78 × \(10^{-19}\) Joule

E₂ = 5E₀; E₂ = 5 × 5.95 × \(10^{-20}\)

E₂ = 2.95  × \(10^{-19}\) Joule

Therefore, the first three energy level of the electron is E₀= 5.95 × \(10^{-20}\) Joule  E₁ = 1.78 × \(10^{-19}\) Joule E₂ = 2.95  × \(10^{-19}\) Joule respectively.

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Answer:

c 1386J

Explanation:

You use the formula MCΔT where m is mass, C is specific heat, and delta t is change in temperature

Therefore, when 1.52 mol of hydrogen peroxide decomposes, approximately -298.72 kJ of heat is released.

The decomposition of hydrogen peroxide can be represented by the following equation:
2 H2O2 -> 2 H2O + O2
From the balanced equation, we can see that 2 moles of hydrogen peroxide decompose to form 2 moles of water and 1 mole of oxygen gas.
To calculate the amount of heat released during the decomposition of 1.52 mol of hydrogen peroxide, we need to know the molar enthalpy change of the reaction, which is given as ΔH = -196 kJ/mol.
The molar enthalpy change represents the heat released or absorbed per mole of the substance involved in the reaction. In this case, since the reaction involves the decomposition of hydrogen peroxide, the molar enthalpy change refers to the amount of heat released when 1 mole of hydrogen peroxide decomposes.
To find the amount of heat released when 1.52 mol of hydrogen peroxide decomposes, we can use the following equation:
Heat released = ΔH × moles of hydrogen peroxide decomposed
Substituting the values into the equation:
Heat released = -196 kJ/mol × 1.52 mol
Calculating the heat released:
Heat released = -298.72 kJ
Therefore, when 1.52 mol of hydrogen peroxide decomposes, approximately -298.72 kJ of heat is released.

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Answer:

True

Explanation:

The bodies internal organs move around, even after a collision that may impact your skeletal system.

When a collision occurs and the body comes to a sudden stop, the internal organs can continue to move due to their inertia. Yes, that statement is generally true.

Inertia is the property of an object that resists changes in its state of motion. The internal organs of the body, such as the heart, lungs, liver, and others, are not directly attached to the skeletal structure and are instead supported by connective tissues and surrounded by fluids.

During a collision, the body experiences a rapid deceleration or change in velocity. While the external motion of the body may come to a stop, the internal organs, due to their inertia, continue to move forward momentarily until they are acted upon by internal forces. This phenomenon is known as "organ motion" or "organ inertia."

In situations where high-impact collisions occur, such as in car accidents or contact sports, the continued motion of internal organs can result in serious injuries, even when external signs of trauma may be minimal.

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The mass is 12,000

144,000 divided by 12 = 12,000

Momentum = mass × velocity

The functions of the skeletal system are support, movement, production of cells and protection.

The bones, muscles, ligaments, and tendons make up a skeletal system in the human body. It serves as body's support system to enable correct movement and bodily function. The skeleton gives the entire body structural support, allowing us to sit, stand, and move freely. In addition, fragile organs the brain, heart, and lungs are safeguarded by the bones of the skull, ribs, and spinal column.

Additionally, the skeletal system makes blood cells and stores minerals. The production of these cells, and platelets all essential for immune system and blood clotting take place in the bone marrow, which is found inside numerous bones. In addition, our ability to move and engage in activities like running, jumping, and dancing is made possible by our bones working in tandem with our muscles and joints.

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Answer: b

Explanation: just did it

A ray of light parallel to the optic axis of a concave mirror is reflected back through the focal point.

The reflection of a ray of light parallel to the principal axis of a concave mirror will pass through the focal point F' after reflection.

The point where the parallel beam intersects the principal axis after reflection is the focal point F' of the concave mirror.

A concave mirror also known as a converging mirror, is a spherical mirror that bulges inward.

When an object is placed in front of a concave mirror, the light rays that emanate from the object are reflected from the mirror's surface, and the image is formed.

When the object is located at the focal point F of the mirror, the light rays are reflected parallel to the mirror's axis of symmetry, generating an image at infinity.

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It is important to note that the debate between scientific realism and antirealism is ongoing and complex, with various nuances and perspectives within each position. Different philosophers of science and scientists may hold different views on the nature of scientific terms and their relationship to reality.

According to a scientific realist perspective, scientific terms for unobservable phenomena such as "atom" and "black hole" are seen as referring to entities that truly exist in reality. Scientific realists believe that scientific theories and concepts accurately capture aspects of the world, including unobservable entities and phenomena. They argue that scientific theories provide the best explanation of the natural world and aim to describe the underlying structure and mechanisms of reality.

On the other hand, scientific antirealists hold a different view. They argue that scientific terms that refer to unobservable phenomena do not necessarily correspond to something that exists independently in reality. Antirealists often emphasize the instrumentalist view of science, which suggests that scientific theories are simply tools or frameworks that help us organize and predict observable phenomena, without making claims about the ultimate nature of reality.

Antirealists may argue that scientific theories are subject to revision and change over time as new evidence emerges, suggesting that the terms used to describe unobservable phenomena are not fixed and may not have a one-to-one correspondence with actual entities in reality. They may also highlight the role of social and cultural factors in shaping scientific knowledge, suggesting that scientific terms are influenced by human conventions and interpretations.

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Answer:B

Explanation:

The answer would be B because Answer B exerts a force which has a reaction.

okay, so what i have learned from my experiences with doing school on e.d.g.e.n.u.i.t.y (they won't let me say the website name on here lol) is that after you write an extended response, they show you a sample response as well as these checkboxes which show things they wanted you to have included in your answer. ideally they want you to select all of them, meaning that all of those elements were included in your answer. it's not a matter or right or wrong; none of those checkboxes contain a wrong answer. you just select the ones that apply to your answer, and you won't get penalized if you don't select all of the checkboxes. you don't even have to select any of them. there's been times where my answer has been not at all what it should've been and i just click done without checking any of those boxes because i did not include any of those elements in my response. as long as the box that you wrote your answer in is outlined in green (which yours is, and that means that the computer likes your answer), you will be fine.

i hope this makes sense! it's sort of hard to explain. if you have any questions, just comment and i'll try my best to explain better lol. have a great rest of your day! <3

Answer:

W = 60 J

F = 15 N

s = ?

W = Fs

s = W / F

s = 60 / 15

s = 4 m

The rotation of the angle of reflection from its original position is 20°.When a mirror is rotated at an angle.

Since the angle of incidence is equal to the angle of reflection, the angle of reflection also changes by 20° (twice the angle of rotation) from its original position. Therefore, the rotation of the angle of reflection from its original position is 20°. The rotation of the angle of reflection from its original position when a mirror is rotated at an angle of 10° is 20°.

According to the law of reflection, the angle of incidence is equal to the angle of reflection. When a mirror is rotated, both the angle of incidence and the angle of reflection change. If the mirror is rotated by 10°, the angle of incidence changes by 10°, and since the angle of reflection is equal to the angle of incidence, the angle of reflection also changes by 10°. Therefore, the total change in the angle of reflection is 10° + 10° = 20°.

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The power delivered is 25 Watts (W) because Power = Work/Time = 50 J/2 seconds = 25 W.

Power is the rate at which work is done or energy is transferred. It is expressed as the amount of work done (in joules) divided by the time it takes to do the work (in seconds). Power is measured in units such as watts (W) or joules per second (J/s).

Power is an important concept in physics, engineering, and other sciences, as it allows us to understand the rate at which energy is used or transferred.

Calculation of power

Power = Work/Time

Power = 50 J/2 seconds

Power = 25 W

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The earliest known observations of the night sky date back to ancient civilizations such as the Babylonians, Egyptians, and Chinese, who recorded the positions of stars, planets, and other celestial bodies.

a = F / m

where F is the force (thrust) acting on the rocket and m is the mass of the rocket.

In this case, F = 20,000 N and m = 3,000 kg

So, a = 20,000 N / 3,000 kg = 6.67 m/s²

b) To calculate the final speed of the rocket after 5 minutes, you can use the formula:

v = a * t

where v is the final speed, a is the acceleration and t is the time.

In this case, a = 6.67 m/s² and t = 5 minutes = 300 seconds.

So, v = 6.67 m/s² * 300 seconds = 2,001 m/s

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Answer:its velocity changes

Explanation:

For a cylinder of mass M and radius R is released from rest at the top of an inclined plane, the expression is mathematically given as

L=MR * √{gh/3}

Generally, the equation for the angular velocity  is mathematically given as

w=V/R

Therefore

\(w=\frac{\sqrt{ugh/3}}{R}\)

In conclusion, at instance of IW, the angular velocity

\(L=MR^2/2 * 2\sqrt{gh/3}/R\)

L=MR * √{gh/3}

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Answer:

The x - component of vector B is determined as -18.3 m.

What is x-component of  a vector?

The x-component  or horizontal component of a vector is the value of the vector acting or pointing x direction  or in a horizontal direction.

The x-component or horizontal component of a vector on a given plane calculated as follows;

Bx = B cos(θ)

where;

The given parameters include the following;

Substitute the given parameters into the above equation and for the x-component of vector b.

Bx = 18.6 x cos(170)

Bx = -18.3 m

Thus, from the magnitude of vector B in the image, the value of vector B in x - direction is -18.3 m.

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