What resonant frequency would you expect from blowing across the top of an empty soda bottle that is 20 cm deep, if you assumed it was a closed tube

Answer: discplacement/change in time = average velocity.

Explanation:

There is a formula for velocity which is given above

The wavelength of the EM emission for a transition from spin up to spin down in a hydrogen atom placed in a 15. T external magnetic field is approximately 1.424 x 10⁻⁷ meters.

The wavelength of electromagnetic (EM) emission for a transition from spin up to spin down in a hydrogen atom placed in a 15. T external magnetic field can be calculated using the formula:

λ = (h / (4π m e B))

Where: -

λ is the wavelength of the EM emission,

h is the Planck's constant (6.626 x 10⁻³⁴ J s),

π is a mathematical constant (approximately 3.14159),

m e is the mass of the electron (9.109 x 10⁻³¹ kg),

B is the magnetic field strength (15. T).

Let's substitute the given values into the formula and solve for the wavelength:

λ = (6.626 x 10⁻³⁴ J s) / (4π * 9.109 x 10⁻³¹ kg * 15. T)

Before performing the calculation, we need to convert the magnetic field strength from Tesla (T) to Weber per square meter (Wb/m²).

1 Tesla (T) is equal to 1 Weber per square meter (Wb/m²).

Therefore, the magnetic field strength remains the same. Now, let's perform the calculation:

λ = (6.626 x 10⁻³⁴ J s) / (4π * 9.109 x 10⁻³¹ kg * 15. T)

λ = (6.626 x 10⁻³⁴ J s) / (4 * 3.14159 * 9.109 x 10⁻³¹ kg * 15. T)

λ ≈ 1.424 x 10⁻⁷ m

Therefore, when a hydrogen atom is placed in a 15. T external magnetic field, the wavelength of the electromagnetic emission (EM emission) during a transition from spin up to spin down is about. 1.424 x 10⁷ meters.

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Answer:

I think it's b and I'm sorry if it's wrong

Two masses oscillating together with each of their time period as ,'T'

Option B

we know that,

The time period of a mass 'm' on a spring of spring constant 'k' can be strategize by the following equation :

\( \huge \rightarrow \: T \: = 2π \sqrt{ \frac{m}{k} } \)

According to the question,

so,

The new time period would be

\( \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{2m}{2k} } \)

\( \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{m}{k} } \)

\( \huge \rightarrow \: T ' \: = T\)

Hence ,option B is correct ✓

Answer: 12 minutes

Explanation:

Answer:

Below:

Explanation:

The most common method used by the USGS for measuring velocity is with a current meter. However, a variety of advanced equipment can also be used to sense stage and measure streamflow. In the simplest method, a current meter turns with the flow of the river or stream.

Hope it helps...

It's Ms-Muska

The clown should look 1 m from the floor to see his feet in the full-length mirror.

The height of the clown is 2 m, and the mirror is a full-length mirror, which means it covers the entire height of the clown from the floor to the ceiling. Therefore, the clown's reflection in the mirror will also be 2 m tall.  

To see his feet in the mirror, the clown needs to look at the same distance from the floor as the distance between his feet and the floor. Since the clown's height is 2 m and his feet are at the bottom, 1 m away from the floor, he needs to look at a distance of 1 m from the floor to see his feet in the mirror. Therefore, the correct answer is "O 1 m from the floor."

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The minimum force needed to make the crate start tipping is 294 N.

To find the minimum force required, we need to determine the point at which the torque created by the applied force overcomes the torque created by the crate's weight.

At the tipping point, the applied force acts at a distance equal to the height of the crate (1.6 m), and the weight of the crate acts at a distance of half the crate's depth (0.4 m).
The formula for torque is: torque = force × distance
At the tipping point, the torques balance each other, so:
applied_force × height = weight × (depth/2)
Let's calculate the crate's weight: weight = mass × gravitational_acceleration
weight = 60 kg × 9.8 m/s² = 588 N
Now, we can find the applied force:
applied_force × 1.6 m = 588 N × 0.4 m
applied_force = (588 N × 0.4 m) / 1.6 m
applied_force = 294 N

Summary: The minimum force required to make a 60 kg crate with dimensions 1.6 m x 0.8 m x 0.8 m start tipping is 294 N.

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If a 10Ω resistor is removed and replaced by a 20Ω resistor, at constant voltage, the current will decrease.

This law states that, the current flowing in a conductor is directly proportional to the voltage in the conductor.

V = IR

where;

I = V/R

At constant voltage, when the value of the resistance increases, the value of the current in the ciircuit wil decrease.

Thus, if a 10Ω resistor is removed and replaced by a 20Ω resistor, at constant voltage, the current will decrease.

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Answer:

the answer is A.) Wedge

A knife to cut a piece of bread is a A. Wedge

A simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work.

since , a wedge is a simple machine  with two inclined planes which when put together forms a sharped edge, which forms a triangular shaped tool which can be used to separate portion of  two objects .

hence , a knife to cut a piece of bread is a A. Wedge

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Answer:

the third one

Explanation:

she is using a card instead of paper

Answer:

3000g

hope this helps<3

The Ciliary body is a wedge-shaped thickening in the middle layer of the eyeball that controls the shape of the lens.

The middle layer of the eye's wall contains the ciliary body.

The ring-shaped muscle that modifies the shape of the lens when the eye focuses is part of the ciliary body, which is located behind the iris.

Additionally, it creates the transparent liquid that fills the space between the iris and the cornea.

The ciliary muscle, which regulates the lens's shape, and the ciliary epithelium, which creates aqueous humor, are both components of the eye's ciliary body (wedge shaped opening).

In the ciliary body's non-pigmented region, the aqueous humor is created. The ciliary body is a component of the uvea, the layer of tissue that nourishes and oxygenates the tissues of the eyes.

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Answer:

its D

Explanation:

i just got it correct on a. p. e. x. :)

Answer:

gkcfgggxg hhfdc ghgffgccvvc

bjvhgf

Explanation:

gjhghujj bhhgghj

The magnitude of London dispersion forces depends on the polarizability of the interacting particles, which determines their ability to induce temporary dipoles.

The interaction energy of these forces is inversely proportional to the sixth power of the distance between the particles.

London dispersion forces, also known as van-der Waals forces, are weak intermolecular forces that occur between all atoms and molecules. These forces arise from temporary fluctuations in electron distribution, creating instantaneous dipoles. The magnitude of London forces depends on the polarizability of the particles involved. Polarizability refers to the ease with which the electron cloud of an atom or molecule can be distorted.

Larger, more easily distorted electron clouds have higher polarizability and can induce greater temporary dipoles in neighboring particles.

The interaction energy of London dispersion forces follows an inverse sixth power relationship with distance. As the particles move closer together, the electron clouds become more distorted, resulting in stronger instantaneous dipoles. The energy of interaction decreases rapidly with distance due to the inverse sixth power relationship, which means that even slight changes in distance can have a significant impact on the strength of these forces.

Consequently, particles that are very close together experience much stronger London forces compared to those that are farther apart.

In summary, the magnitude of London dispersion forces depends on the polarizability of the interacting particles, while the interaction energy is inversely proportional to the sixth power of the distance between them.

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a) The total resistance of the circuit in which three 45 ohm lightbulbs and three 75 ohm light bulbs connected in series is 360 ohm.

b) The total resistance of the circuit if all six are wired in parallel is 28.57 ohm.

a) In order to find the series total resistance, we need to add all resistances,

Req = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ = 45 + 45 + 45 + 75 + 75 + 75 = 135+ 225 = 360 ohm

b) Now, since the resistances are in parallel, we need to use the expression below,

1/Req = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄ + 1/R₅ + 1/R₆

Putting in the values,

1/Req = 1/45 + 1/45 + 1/45 + 1/75 + 1/75 + 1/75

1/Req = 1/0.035

Req = 28.57 ohm

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The semimajor axis of the new planet orbiting a 2 MSun star with a 4-day period is approximately 0.05 AU.

The Doppler method allows astronomers to find the semimajor axis of an extrasolar planet's orbit by measuring its orbital period and the mass of the star it orbits.

For a new planet discovered orbiting a 2 MSun star with a period of 4 days, we can use the formula a = [\(P^2\)G(M+M*)\(/4\pi ^2\)]\(^(^1^/^3^)\), where P is the orbital period, G is the gravitational constant, M is the mass of the planet, and M* is the mass of the star.

Assuming the planet has a negligible mass compared to the star, we can simplify the formula to a = [(2MSun)(4 days)\(^2\)G/4\(\pi ^2\)]^(1/3), which yields a semimajor axis of approximately 0.05 AU.

This means the planet orbits its star at a distance of about 7.5 million km.

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Answer:

There is no motion of the charge except along the axis of the ring.

(All charges on the ring are equivalent, with no net force perpendicular to the axis of the ring)

The electric potential of the axis of the ring decreases as the charge is moved away from the center of the ring,

The force on the negative charge will always be directed towards the center of the ring. (It would take work to move the charge "away" from the ring)

The normal and shearing stresses after the element has been rotated 10° is 53.8 Mpa.

Stress is defined as the resisting force per unit area. It is expressed in N/m2.In engineering problems, the transformation of stress mainly deals with plane stress, in which two of the faces of the cubic element are free from stress. Suppose if z axis is chosen perpendicular to these two faces, we can ignore

Such a situation is called plane stress condition.The planes which have maximum and minimum normal stresses observed are known as principal planes. In these planes, the shear will be zero.

Principal stresses: The normal stresses in the principal planes are called principal stresses. Assume that a state of plane stress exists at a point G with stresses as,The standard element for plane stress at a point G is shown below:

Determine the shearing stress after the element rotated through

counter-clock wise.

Calculation:-

Tx'y' = - σx - σy/2 sin2θ + Txycos2θ

        = - (-60 - 90) + 30 cos (2× 10°)

       = 53.8 Mpa

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Answer:

add add more hot water in the flask painted shiny white while less of it in the one painted Matt black

Explanation:

Let's name the flasks A and B respectively

flask A due to the nature of its exterior will tend to reflect heat from the environment thus will need more hot water while flask B since it painted in Matt black the heat will be absorbed from the environment thus will require less hot water

You were approximately 5.72 meters away from the second baseman. The vertical drop or distance between point A and point B was approximately 0.4576 meters.

To determine the distance between you (the shortstop) and the second baseman, we can use the formula for horizontal distance (d) traveled by an object moving at a constant horizontal velocity:

d = v * t

where:

- d is the horizontal distance traveled,

- v is the horizontal velocity of the ball,

- t is the time taken.

Given that the horizontal velocity (v) is 13 m/s and the time (t) is 0.44 s, we can calculate the horizontal distance (d) as follows:

d = 13 m/s * 0.44 s = 5.72 meters

So, you were approximately 5.72 meters away from the second baseman.

To find the vertical drop or the distance between point A and point B, we need to calculate the vertical component of the ball's motion. Since the ball is thrown horizontally, it will experience a constant vertical acceleration due to gravity.

The formula to calculate the distance (d) traveled vertically in free fall is:

d = 1/2 * g * t²

where:

- d is the vertical distance traveled,

- g is the acceleration due to gravity (approximately 9.8 m/s²),

- t is the time taken.

Given that the time (t) is 0.44 s, we can calculate the vertical distance (d) as follows:

d = 1/2 * 9.8 m/s² * (0.44 s)² = 0.4576 meters

So, the vertical drop or the distance between point A and point B is approximately 0.4576 meters.

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Since every ice crystal takes a different route to the ground. They will float through various clouds with various temperatures and moisture contents, which will cause the ice crystal to develop in a distinctive manner.

A snowflake's shape changes as it flies through the atmosphere, thus no two are ever the same. Even two flakes floating side by side will each be blown through various vapour and humidity levels to produce a genuinely unique shape.

One of the most recognizable representations of winter weather are snowflakes. There are an unlimited amount of conceivable shapes for snowflakes, and each one is distinct.

Therefore, snowflakes unique even though there are billions.Even two floating flakes will each be exposed to different vapour and humidity conditions, creating a really distinctive form.

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Answer:

The amount of energy required is 4.08 J.

Explanation:

Given,m1 = m2 = 0.55-kgR = 14 cm = 0.14 m The distance between the two basketballs d = 1.1 m

Energy required to change the separation between the centers of the basketballs to 1.1 m is given by the formula; E = K1 + K2 - U where K1 = kinetic energy of ball 1K2 = kinetic energy of ball 2U = potential energy

Let's calculate K1,K2, and U: K1 = 0.5 mv²where m = mass of ball v = velocity of ball Initial velocity of ball = 0 m/s Final velocity of ball v = 0.5 m/sK1 = 0.5 × 0.55 × (0.5)²= 0.069 JK2 = 0.5 mv² Initial velocity of ball = 0 m/s .

Final velocity of ball v = - 0.5 m/sK2 = 0.5 × 0.55 × (- 0.5)²= 0.069 J Let's find out the potential energy; U = (kQ1Q2) / d

where Q1 = Q2 = Q d = distance between the centers of two balls U = (kQ²) / d where k = Coulomb's constant = 8.99 × 10⁹ Nm²/C²Q = charge on a ball = 0 (because it is an uncharged object) U = 0.

Therefore, E = K1 + K2 - U= 0.069 + 0.069 - 0= 0.138 J Therefore, the amount of energy required is 4.08 J.

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It would take 4.1 seconds for the car to accelerate from rest to 270 km/h.

So, the acceleration can be written as a = k(300 - v)

where k is the constant of proportionality and v is the velocity of the car in km/h.

It is known that, when the car is at rest, i.e., v = 0, it can accelerate from rest to 135 km/h in 10 s.

So, we can write;135 = k(300 - 0) => k = 135/300 => k = 0.45

Now, we are to find the time taken by the car to accelerate from rest to 270 km/h.

Let t be the time taken.

So, the velocity of the car after time t is given by;

v = 300 - 270e^(-0.45t)

Putting v = 0 in the above equation,

we get;

0 = 300 - 270e^(-0.45t)

  => e^(-0.45t) = 10/9

  => -0.45t = ln(10/9)

  => t = 4.1 sec

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Answer:

Flash flooding or ongoing heavy rain can be precursors to landslides, mud/debris flows, and even rockfalls. ... Rockfalls are often caused by erosion of earth around larger rocks that then become loose and fall. Earthquakes can also lead to landslides and rockfalls.

Explanation:

It is a geological process called erosion.

When an object is placed inside the focal point of a concave mirror, the image formed will be virtual, upright, and magnified.

This occurs because the light rays reflecting off the mirror diverge and never intersect on the real side of the mirror. Instead, they appear to converge on the virtual side, behind the mirror.

As a result, the image of the object will be farther from the observer than the object itself. The observer will see the image behind the mirror, which is not the actual position of the object, making it appear more distant than it truly is.

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Explanation:

In other to avoid a situation where their differences, pride, and personalities caused them to compete and publicly insult one another instead of working together they need to respectfully consider the viewpoints of each other, as well as assign individual roles that should be respected.

Answer:

b. increases, decrease

Explanation:

Visible light generally falls within the range of approximately 400-700 nanometers (nm). By applying Wien's displacement law, we can estimate the peak wavelength corresponding to the given temperature of 5000 K.

To calculate the approximate power radiated by the black body as visible light, we can use the Stefan-Boltzmann law and Wien's displacement law. The power emitted by a black body is given by the Stefan-Boltzmann law, while the fraction of power emitted as visible light can be estimated using Wien's displacement law.

The power radiated by a black body is given by the Stefan-Boltzmann law:

Power = σ * A * T^4,

where σ is the Stefan-Boltzmann constant (approximately 5.67 × 10^−8 W/(m^2·K^4)), A is the surface area of the black body (converted to square meters), and T is the temperature in Kelvin.

To estimate the fraction of power emitted as visible light, we can use Wien's displacement law, which states that the peak wavelength of radiation emitted by a black body is inversely proportional to its temperature.

Visible light generally falls within the range of approximately 400-700 nanometers (nm). By applying Wien's displacement law, we can estimate the peak wavelength corresponding to the given temperature of 5000 K.

Combining these two laws, we can calculate the approximate power radiated by the black body as visible light.

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