which statements accurately describe mechanical waves​

The de Broglie wavelength of a neutron moving at 1.00 of the speed of light is approximately 0.0656 nanometers (nm).

The de Broglie wavelength is a concept in quantum mechanics that relates the momentum of a particle to its wavelength. It can be calculated using the de Broglie wavelength formula:

λ = h / p

where λ is the de Broglie wavelength, h is the Planck's constant (approximately 6.626 × 10^-34 J·s), and p is the momentum of the particle.

Given:

Light Speed  (c) = 3.00 × 10^8 m/s

Neutron Speed  (v) = 1.00 × c

The momentum (p) of a particle can be calculated as:

p = m * v

where

m = mass of the neutron.

The mass of a neutron (m) is approximately 1.675 × 10^-27 kg.

Substituting the values into the equations:

p = (1.675 × 10^-27 kg) * (3.00 × 10^8 m/s)

≈ 5.025 × 10^-19 kg·m/s

calculate the de Broglie wavelength

λ = (6.626 × 10^-34 J·s) / (5.025 × 10^-19 kg·m/s)

≈ 1.315 × 10^-15 m

Converting the de Broglie wavelength to nanometers:

λ = (1.315 × 10^-15 m) * (10^9 nm/1 m)

≈ 0.0656 nm

Therefore, the de Broglie wavelength of a neutron moving at 1.00 of the speed of light is approximately 0.0656 nanometers (nm).

The de Broglie wavelength of a neutron moving at 1.00 of the speed of light is approximately 0.0656 nm.

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William Herschel thought he had found a comet when he spotted the green disk of Uranus.

Uranus is the seventh planet located far away from the Sun. It is a gaseous planet which was discovered in 1781, mistaken by a comet but after two years it was accepted as a planet. After decades of observations and only one close visit by a spacecraft, which shows us that Uranus has unique atmosphere.

Atmosphere of Uranus is mostly made up of hydrogen and helium as well as a small amount of methane and traces of water and ammonia. The presence of methane gas gives blue colour to Uranus so we can conclude that Uranus is the planet which was thought first a comet by William Herschel.

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Answer:

v = 10 m/s

Explanation:

We have,

Our initial velocity is 20 m/s

Our acceleration, \(a=-5\ m/s^2\)

It is required to find the velocity after 2 seconds. It is a concept based on equation of kinematics. Using first equation:

\(v=u+at\)

Plugging all the known values

\(v=20+(-5)(2)\\\\v=10\ m/s\)

So, our final velocity is 10 m/s.

Answer:

0.015A

Explanation:

I=V/R

=1.5/100

0.015A

Just apply ohm's law

Dark matter makes up about 27% of the universe.

Quasars and abundant in dark matter, and with over 2,000 quasars identified today, it is clear that the universe contains a lot of dark matter.

All the stars, spheres and galaxies that can be perceived nowadays make up just 5 percent of the universe. The former 95 percent is prepared of stuff stargazers can't see, notice or even understand. These secretive substances are called dark energy and dark matter.

Experts determine their presence grounded on their gravitational influence on what little bits of the universe can be perceived.

Dark energy refers to that energy which acts against gravity, thereby resulting in the expansion of the universe. It's major constituent is current characterized with vacuum fluctuation. It is on this premise that dark matter was theorized to be causing the expansion of the universe to accelerate and itself including dark matter is filled in empty space.

Therefore, from the simple note above, it can be deduced that dark energy of dark matter does not produce electromagnetic radiation.

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Answer:

C. Time

Explanation:

Answer: time because i am so good

Explanation:

A lightyear is a unit of distance, specifically the distance light travels in one year. That distance is about 9,460,730,472,580.8 kilometers, or 5,878,625,373,183.6 miles.

What is distance?

Distance is a measurement of the space between two objects or points. It is a scalar quantity that is commonly measured in feet, yards, meters, or kilometers. Distance can refer to the physical space between two points, such as the distance between two cities, or the length of a road. It can also refer to the space between two objects, such as the distance between two planets. Distance is an important factor in physics, as it is used to calculate the speed and velocity of a moving object. Distance can also be used to calculate the amount of energy required to move an object or the amount of time it takes for a sound wave to travel between two points.

Therefore, That distance is about 9,460,730,472,580.8 kilometers, or 5,878,625,373,183.6 miles.

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Recall, Newton's gravitational law states that any particle of matter in the universe attracts any other particle with a force varying directly as the product of their masses and inversely as the square of the distance between them. It is expressed as

F = Gm1m2/r^2

where

F is the force in Newton

G is gravitational constant = 6.673 x 10^-11 Nm^2/kg^2

m1 and m2 are the masses in kg

r is the distance in meters

From the information given,

r = 1.5

acceleration = 2cm^2/s

Recall, 100 cm = 1m

2 cm = 2/100 = 0.02m

Thus,

acceleration = 0.02m/s^2

Since the masses are identical, then m1 = m2

Each of them is accelerating at 0.02m/s^2

Recall,

Force = mass x acceleration

Force = m1 x 0.02 = 0.02m1 N

By substituting the given values into the formula, we have

0.02m1 = (6.673 x 10^-11 x m1 x m1)/1.5^2

m1 on the left cancels out one m1 on the right. It becomes

0.02 = (6.673 x 10^-11 x m1)/1.5^2

By crossmultiplying,

0.02 x 1.5^2 = 6.673 x 10^-11 x m1

0.045 = 6.673 x 10^-11 x m1

m1 = 0.045/6.673 x 10^-11

m1 = 6.74 x 10^8 kg

The mass of each ball is 6.74 x 10^8 kg

With mild microscopy, one cannot visualize directly systems together with cell membranes, ribosomes, filaments, and small granules and vesicles.

Hematoxylin or hematoxylin, additionally referred to as herbal black 1 or C.I. 75290, is a compound extracted from the heartwood of the logwood tree with a chemical system of C ₁₆H ₁₄O ₆. This clearly derived dye has been used as a histologic stain, ink, and as a dye in the textile and leather industry.

Hematoxylin is used to demonstrate nuclear detail in cells. depth of coloration isn't always most effective associated with the amount of DNA inside the nuclei but also with the length of time the pattern spends in hematoxylin. Hematoxylin is a reasonably simple dye to make. The dye itself is extracted from the tree Haematoxylum campechianum.

Hematoxylin and eosin are the precept stains used for the demonstration of the nucleus and the cytoplasmic inclusions. Alum acts as a mordant and hematoxylin-containing alum stains the nucleus mild blue which turns crimson in the presence of acid. Cell differentiation is performed by means of treating the tissue with an acid solution.

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The prove of  Angle XYZ- Angle NYM is given below:

Note that from the image given;

Since ∠XYZ is said to be congruent to ∠NYM it can be proven by the use of the reflexive property.

The reflexive property is one that informs that any shape is regarded congruent to itself.

Since ∠NYM has a different way to call ∠XYZ that uses a different vertexes, but the sides are made up of the two angles which are said to be the same.

Therefore , ∠XYZ ≡ ∠NYM are proved by the reflexive property.

Since ΔXYZ is the same with Δ NYM, it can be proven by the AA (angle-angle) similarity theorem.

We have 2 angles Δ XYZ and Δ NYM:

Note that ∠YXZ ≡ ∠YNM

              ∠XYZ ≡ ∠NYM

So,  ΔXYZ is said to be the same to ΔNYM and it is proven by the AA similarity theorem.

Therefore, The prove of  Angle XYZ- Angle NYM is given below:

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Answer:

1. parrael

2. corresponding angles theorem

3. NYM

4. AA

Explanation:

just took it

Answer:

ii is the correct option for the question

Fluid Pressure exerted by water will be = 980000 Pa

The pressure at any given point of a non moving fluid is called Fluid pressure . It is the increase in pressure at increasing depths in a liquid . It can be calculated by using the equation , Fluid Pressure = density of fluid  * acceleration due to gravity * depth in fluid

Fluid pressure = rho * g * h

              = 1000 kg/m^3 * 9.8m/s^2 * 100m

              = 980000 Pa

Fluid Pressure exerted by water will be = 980000 Pa

correct option iv) 980000 Pa

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Answer: i don’t know maybe later i will ask thAT question

Explanation:

The statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is False.

When a permanent magnet is cut in half, it does not result in separating the magnet into distinct north and south poles. Instead, each resulting piece will still have its own north and south poles. This phenomenon is known as magnetic domain alignment. The domains within a magnet are regions where the magnetic moments of atoms align in the same direction, creating a magnetic field. Cutting a magnet disrupts the alignment of these domains, but it doesn't create isolated north and south poles on separate pieces.

Regardless of how a permanent magnet is divided, each resulting piece will have its own north and south poles. The magnetic field lines will still flow from the north pole to the south pole within each piece. Therefore, the statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is false.

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The complete question is

which of the following statements concerning permanent magnets is false?- the direction of a magnetic field is indicated by the north pole of a compass-when a permanent is cut in half, one piece will be a north pole and one piece will be a south pole-the north pole of a permanent magnet is attracted to a south pole-magnetic field line outside a permanent magnet originate from the north pole and end on the south pole-all permanent magnets are surrounded by the magnetic field

Answer:

25.13 ft

Explanation:

r = 4 feet

ω=0.25 revolution per minute

=1 revolution in  4 minutes  

total number of revolution N = 1 (in 4 minutes )

v=rω

distance traveled = 2×N×π×r

=2×1×π×4  

=8π

= 25.13ft in 4mins

Answer:

The percent uncertainty of the volume=\(\frac{15.70}{523.59} \times 100=2.99\%\)

The volume of sphere with absolute uncertainty=\(523.59 \pm 15.7 cm^3\)

Explanation:

Radius of sphere = 5 cm

Radius with uncertainty r'= \(5 \pm 0.05\)

Volume of sphere = \(\frac{4}{3} \pi r^3=\frac{4}{3} \pi (r')^3\)

\(V=\frac{4}{3} \pi (r')^3\\\frac{dV}{dr'}=4\pi (r')^2\)

Where dV is the uncertainty in volume

dr' is the uncertainty in radius

\(dV=4\pi (r')^2 dr'\\dV=4 \pi (5)^2(0.05)\\dV=15.70\\V=\frac{4}{3} \pi (r')^3=\frac{4}{3} \pi (5)^3=523.59\)

The percent uncertainty of the volume=\(\frac{15.70}{523.59} \times 100=2.99\%\)

The volume of sphere with absolute uncertainty=\(523.59 \pm 15.7 cm^3\)

The time period is 0.3 s and frequency is 3 Hz

Step 1 :

Given:

No. of cycles N = 24

Total time take t = 8 s

Step 1 : Calculating the frequency:

The frequency of a wave or oscillation is defined as the number of cycles or completed alternations per unit time.

f = N/t

f = 24/8

f = 3 Hz

Step 2: Calculating the time period:

Frequency and time period are inversely proportional.

The amount of time it takes for something to complete one oscillation is called its time period.

Time period = 1/Frequency

Time period = 1/3 = 0.3 s

So, the time period is 0.3 s and frequency is 3 Hz.

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Answer:

there are 235cm in 2.35m

Answer: 28.0134 g/mol

Explanation:

For a molecule (for example, nitrogen, N2) the mass of molecule is the sum of the atomic masses of the two nitrogen atoms. For nitrogen, the mass of the N2 molecule is simply (14.01 + 14.01) = 28.02 amu.

a. The deflection of a cantilever beam under an axial load and found that P = 7,638 lbs.

b.  The corresponding maximum stress in the column is 7,638 psi, using the formula for axial stress.

To solve this problem, we need to use the formula for the deflection of a cantilever beam under an axial load:

δ = PL^3 / 3EI

where δ is the deflection at the free end, P is the axial load, L is the length of the beam, E is the modulus of elasticity, and I is the moment of inertia.

First, we need to find the length L of the beam. Since point D is 0.25 in. from the geometric axis of the square aluminum bar BC, we can assume that point C is also 0.25 in. from the axis. Therefore, the length of the beam is the diagonal of a square with sides of length 1 in.:

L = √2 in.

Next, we need to find the moment of inertia I of the beam. Since the beam is a square, we can use the formula for the moment of inertia of a square about its centroid:

I = (1/12)bh^3

where b is the side length and h is the distance from the centroid to one of the sides. Since the beam has a side length of 1 in., its centroid is at the center, and h is 0.5 in.:

I = (1/12)(1 in.)(0.5 in.)^3 = 0.00208 in.^4

Now we can solve for the load P that will cause a deflection of 0.50 in. at point C:

0.50 in. = PL^3 / 3EI

P = 0.50 in. x 3EI / L^3 = (0.50 in.)(3)(10.1 x 10^6 psi)(0.00208 in.^4) / (√2 in.)^3 = 7,638 lbs

To find the maximum stress in the column, we can use the formula for axial stress:

σ = P / A

where A is the cross-sectional area of the column. Since the column is a square with sides of length 1 in., its cross-sectional area is

A = (1 in.)^2 = 1 in.^2

Therefore, the maximum stress in the column is

σ = 7,638 lbs / 1 in.^2 = 7,638 psi

In conclusion, to determine the load P for which the horizontal deflection of end C is 0.50 in., we used the formula for the deflection of a cantilever beam under an axial load and found that P = 7,638 lbs. We also found that the corresponding maximum stress in the column is 7,638 psi, using the formula for axial stress.

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Given that,

Distance = 60 km

Time = 45 min

To find,

The average speed of the car.

Solution,

Average speed of an object is equal to the total distance divided by total time taken.

45 min = 0.75 hour

It can be given as :

\(V=\dfrac{60\ km}{0.75\ h}\\\\=80\ km/h\)

Therefore, the average speed of the car is 80 km/hr.

Answer:

does work have to be done to hold the object in place

Answer:

Does the object move when it is released from a rest position? and Does a force act on the object?

Explanation:

i had the same quiz today and the other 2 are wrong

The solid bar over the hollow bar to support the same torque because the solid bar provides higher resistance to shear stress and exhibits less angle of twist.

When comparing a solid bar and a hollow bar with the same cross-sectional area, the solid bar would be a better choice to support the same torque. The resistance to shear stress in a solid bar is higher due to its uniform distribution of material throughout its cross-section. In contrast, a hollow bar has material concentrated at its outer perimeter, resulting in lower resistance to shear stress.

The angle of twist, which represents the amount of rotation experienced by the bar under torque, is also a critical factor. The hollow bar, despite having the same cross-sectional area, has material removed from its interior, resulting in reduced resistance to torsion and a higher angle of twist. On the other hand, the solid bar with its continuous material distribution offers greater resistance to torsional forces, resulting in less angle of twist.

Therefore, by choosing the solid bar, we can ensure higher resistance to shear stress and reduced angle of twist, providing better structural integrity and stability when subjected to the same amount of torque.

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The wavelength of a wave is given by the velocity of the wave divided by the frequency:

λ = v / f

where v is the velocity of the wave (3.00 × 108 m/s) and f is the frequency (9.23 × 107 Hz). Plugging in the given values:

\(λ = 3.00 × 10^8 m/s / 9.23 × 10^7 Hz = 3.25 m\)

So the answer is C. 3.25 m

Wavelength is a measure of the distance between two consecutive peaks or troughs of a wave. It is a characteristic property of a wave and determines its type (e.g. light wave, sound wave, etc.).

Wavelength can be calculated using the following formula:

λ = v / f

where λ is the wavelength, v is the velocity of the wave and f is its frequency. The velocity of the wave depends on the medium through which it is propagating (e.g. air, water, vacuum, etc.), while the frequency is a measure of the number of complete cycles of the wave that occur in one second.

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Answer:

There’s a tangential velocity and centripetal force. The object moves in a circle because it’s falling towards the center of the circle (point directly under string) but the velocity is such that the object never gets closer to the center

Explanation:

Answer:

A

Explanation:

Answer:

man yall stop deleting my answers, the other person just said A:(

but yeah its mostly occurs in individual sports

Explanation:

X-rays are electromagnetic radiation with a high frequency and energy. They have frequencies between 3 and 1016 Hz and wavelengths between 0.01 to 10 nanometers. They are discovered to exist in the electromagnetic spectrum's region between ultraviolet and gamma rays.

What distinguishes X-rays from other electromagnetic waves?

X-rays are a part of the electromagnetic spectrum. Light waves get more energetic as their wavelengths shorten. X-rays are more energetic because they have shorter wavelengths. When discussing X-rays, we frequently refer to their energy rather than its wavelength.

Compared to ultraviolet light, x-rays have far higher energies and shorter wavelengths; therefore, scientists normally talk about x-rays in terms.

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Answer:

Explanation:

Itis the 2nd one

Number of bright fringes = 7

To calculate the number of bright fringes (visible maxima) in a diffraction pattern, we can use the formula for the diffraction grating equation:

n * λ = d * sinθ

Where n is the order of the bright fringe, λ is the wavelength of light (520 nm), d is the distance between adjacent slits in the grating, and θ is the angle of the diffracted light.

First, we need to find the distance between adjacent slits (d). The grating has 600 lines/mm, so we can calculate d as:

d = 1 / 600 lines/mm = 1/600 mm = 1.6667 * 10^(-6) m

Now, we can find the maximum order (n_max) that is visible using the grating equation:

n_max * 520 * 10^(-9) m = 1.6667 * 10^(-6) m * sin90°
n_max = 1.6667 * 10^(-6) m / 520 * 10^(-9) m
n_max ≈ 3.2

Since n must be an integer, the maximum order is n = 3.

To find the number of bright fringes, we count the orders on both sides of the central maximum (n = 0). So, there are 2 * 3 + 1 = 7 bright fringes in total.

The correct answer is b) 7.

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