how does it take bee to travel 90 miles of she travels a constant speed of 60 mph in her car?

a, 2 hours and 15 minutes
b, 1 hour and 30 minute
c, 1/2 an hour
d, 30 minutes
e, 45 minutes


help pls ​

(a) The maximum tensile stress in the standard weight steel pipe is determined to be 16,000 psi.

(b) Assuming an extra-strong pipe, the maximum tensile stress is calculated to be 20,000 psi.

(a) To calculate the maximum tensile stress in the standard weight steel pipe, we need to consider the internal pressure acting on the pipe. The internal pressure is given as 400 psi. The maximum tensile stress can be determined using the formula:

Maximum Tensile Stress = (Internal Pressure * Outside Diameter) / (2 * Wall Thickness)

Substituting the given values into the formula, we get:

Maximum Tensile Stress = (400 psi * 12.75 in.) / (2 * 0.375 in.) = 16,000 psi

Therefore, the maximum tensile stress in the standard weight steel pipe is 16,000 psi.

(b) Similarly, for the extra-strong pipe, we use the same formula but with the given dimensions for the outside diameter and wall thickness. Substituting the values, we get:

Maximum Tensile Stress = (400 psi * 12.75 in.) / (2 * 0.5 in.) = 20,000 psi

Therefore, for the extra-strong pipe, the maximum tensile stress is 20,000 psi.

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Answer:

589.3 g is the answer

Explanation:

Answer:

The answer for this would be 589.3g

1 meter per second squared is equivalent to 0.001 kilometer per second squared.

To convert 1 meter per second squared (m/s²) into kilometer per second squared (km/s²), we need to consider the conversion factor between meters and kilometers.

1 kilometer is equal to 1000 meters, so we can use this conversion factor to convert the units.

First, let's convert the acceleration from meters per second squared to kilometers per second squared:

1 m/s² = (1/1000) km/s²

Therefore, 1 meter per second squared is equal to 0.001 kilometer per second squared.

So, 1 m/s² = 0.001 km/s².

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A ball freely falling at 20 m/s will in the next second have a speed of option (A) 30 m/s

We know that the ball is freely falling, which means that it is only being affected by gravity. In this case, we assume that there is no air resistance, which means that the force of gravity is the only force acting on the ball.

The acceleration due to gravity is a constant value, which means that the ball will experience the same acceleration throughout its fall. This value is approximately 9.81 m/s^2.

So if the ball is initially falling at 20 m/s, we can use the equation:

v = u + at

where:

v is the final velocity (what we're trying to find)

u is the initial velocity (20 m/s)

a is the acceleration due to gravity (9.81 m/s^2)

t is the time elapsed (1 second)

Plugging in the values, we get:

v = 20 m/s + (9.81 m/s^2)(1 s)

v = 20 m/s + 9.81 m/s

v = 29.81 m/s

v≈ 30 m/s

Therefore, the correct option is (A) 30 m/s

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Answer:

Larger, because both the Sun and Moon are pulling it.

Explanation:

To plot a histogram of the dataset r = pearsrnd (12, 1.5, 1, 4, 10e4, 1) with 50 bins, the following code can be used: histogram (r, 50)title('Histogram of dataset r')

In MATLAB, the histogram function is used to create a histogram plot. The syntax for this function is as follows: histogram( data)The first argument is the data that needs to be plotted. The second argument is the number of bins that should be used in the plot. In the given question, the dataset r is already provided. Therefore, we can simply pass this dataset as the argument to the histogram function and specify the number of bins as 50. The title function can be used to add a title to the plot.

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Answer:

No. ... UV light causes sunburn, whereas visible light does not.

Explanation:

The light energy produced from a light bulb is far low compared to the light energy produced by the sun. The heat energy also greatly differ in both.

Light energy is a form of energy produced by stars and man made devices. One form of energy can be transformed into other form without destroying the energy.

The source of light and heat energy in stars is nuclear fusion. Fusing of two light nuclei forming a heavy nuclei accompanies the release of tremendous amount of energy.

In a light bulb, the electrical energy is converted to light energy and some energy is lost in the form of heat energy. The light the white light produced by a bulb cannot be as intense as the white lite from sun.

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a) The currents should be in the same direction to produce a magnetic field of magnitude 300 uT.

b) To produce a magnetic field of magnitude 300 uT, the two wires must carry an equal current of \(I = \sqrt{(300*10^{-6} / (2*(4*\pi*10^{-7}))}\) = 0.220 A.

The magnetic field is created by the combination of the two parallel wires and can be found using Ampere's Law: B = (μ0 * I) / (2π * d), where μ0 is the permeability of free space, I is the current, and d is the distance between the two wires.
When two long straight wires are parallel and 8.0 cm apart, and they are to carry equal currents such that the magnetic field at a point halfway between them has magnitude 300 μT, the currents should be in opposite directions. Let's find out how much current is required. Given:Magnetic field, B = 300 μT. Distance between two wires, d = 8 cm = 0.08 mWe need to find out the current required. Formula: Magnetic field due to the wire, B = µ₀I/(2πd) where µ₀ is the permeability of free space and I is the current. Substituting the given values in the above formula, we get:300 × 10⁻⁶ = (4π × 10⁻⁷) × I/(2π × 0.08)I = (300 × 2 × 0.08)/4π × 10⁻⁷I = 1.2 × 10⁴ A.

Therefore, the current required is 1.2 × 10⁴ A.(a) The currents should be in opposite directions.(b) The required current is 1.2 × 10⁴ A.

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The end of a first-order spectrum produced by a diffraction grating that is nearest to the central maximum is the red end (longer wavelength) of the spectrum.

When light passes through a diffraction grating, it is diffracted into different wavelengths or colors. The central maximum corresponds to the straight-through or undeviated light. The wavelengths or colors that are deviated from this central maximum form the spectrum. The deviation is dependent on the wavelength of light, with longer wavelengths experiencing less deviation than shorter wavelengths.

In a first-order spectrum produced by a diffraction grating, the red end of the spectrum (longer wavelengths) will be nearest to the central maximum. This is because longer wavelengths of light experience less deviation compared to shorter wavelengths. As the diffraction angle increases with decreasing wavelength, the shorter wavelengths (blue end) will be further away from the central maximum.

The spectrum order caused by a diffraction grating differs from the spectrum order produced by ordinary refraction. In ordinary refraction, such as when light passes through a prism, the spectrum order is reversed. The red end of the spectrum is farther away from the central maximum, and the blue end is closer to it. This is because refraction in a prism depends on the refractive index of the material, which causes different amounts of bending for different wavelengths. In contrast, a diffraction grating works based on the principle of interference, where the spacing of the grating determines the angles at which different wavelengths are diffracted. Therefore, the order of the spectrum in a diffraction grating is opposite to that in ordinary refraction.

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The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

Answer:

your body is exerting a force on the chair and nothing is happening

Explanation:

Answer:

the second one

Explanation:

as you sit down you are using gravitational force which is pulling straight down but as you sit down there are currently no forces in motion while sitting

Answer:The stones will be at the same height of 62.59 feets 4.4 seconds later.

Explanation:

Gestalt principles refer to a set of laws in psychology that describe how people perceive visual information. The four principles you mentioned are:

Proximity: Objects that are close to each other are perceived as being related to each other.

Similarity: Objects that are similar in appearance are perceived as being related to each other.

Continuity: People tend to perceive lines and shapes as continuing in the same direction, even if they are interrupted.

Closure: People tend to perceive incomplete shapes as complete, such as seeing a full circle when presented with a set of dots arranged in a circular pattern.

Gestalt theory reinforces the fact the whole of anything is greater than its parts. That is, the attributes of the whole are not deducible from analysis of the parts in isolation. The word Gestalt is utilized in modern German to imply the way a thing has been “placed,” or “put together.” There is no exact equivalent in English.

These principles help us understand how our brain organizes and interprets visual information, and are often used in design to create clear and effective visual layouts.

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In comparison to radio waves in a vacuum, visible light in a vacuum has wavelengths that are shorter.

It is because the wavelength of visible light ranges from about 400 to 700 nanometers (nm), while radio waves can have wavelengths of up to kilometers.

When any wave travels through a vacuum, it maintains a constant speed of 299,792,458 meters per second (m/s). But the wavelength and frequency are inversely proportional to each other, so as the frequency of the wave increases, its wavelength decreases, and vice versa.

Hence, visible light with a higher frequency has a shorter wavelength than radio waves, which have a much lower frequency. Thus, the wavelengths of visible light in a vacuum are shorter as compared to radio waves in a vacuum.

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Answer:

Harmful bacteria are called pathogenic

Explanation:

Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.

We know that

• The length of the pool is 20 meters.

• The time spent to swim the pool is 4 seconds.

• The motion is constant.

Given that there's a constant motion, we can use the equation d = v*t, where d = 20m, and t = 4sec. Let's find the constant velocity.

On the other hand, the equation of motion would be d = v*t because the motion has a null acceleration.

Answer:

The answer is "Option B".

Explanation:

Please find the complete question in the attachment file.

When precipitation accumulated and during the night, the ice on the front windshield of the car also formed. Because after the car was heated up the following morning, the ice has melted easily because the thawing vent, that blasts on the front windshield, were switched on full force. Although there was no attempt to refrigerate the passenger door, the ice there dissolved at the very same price as the ice on the front window, quite significantly endangering the legitimacy of the clarification of a speed at which the snow melts.

In comparison to floating, the block experiences a stronger buoyant force when it is entirely submerged.

The correct option is C.

The buoyant force, which exerts upward pressure on completely or partially submerged objects, operates both ways. Its thrust upward is also known as an upthrust. The buoyant force on a body that is partially or entirely submerged in a fluid creates the impression that it is losing weight or becoming lighter.

A body submerged in a liquid, whether partially or entirely, will experience buoyant force, which is equal to the weight of the liquid the body displaces and acts upward at the centre of the fluid's mass.

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Answer:

B. a standing committee

Explanation:

got it right on Edmentum/Plato <3

The law that describes the relationship between the pressure and volume of a gas in a sealed container is Boyle's law.

Boyle's Law, formulated by the Irish scientist Robert Boyle in the 17th century, describes the relationship between the pressure and volume of a gas at a constant temperature. It states that the pressure of a gas is inversely proportional to its volume when the temperature remains constant.

According to Boyle's law, when the pressure of a gas is cut in half, the volume of the gas will double, as long as the temperature remains constant. This means that if you decrease the pressure exerted on a gas by half, the volume of the gas will increase by a factor of two.

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Hello!

a 120-v power supple connected to a 10-ohm resistor will produce 3.464 amps of current

P = 120 V

r = 10Ω

P = r * I²

I² = P ÷ r

I² = 120 ÷ 10

I² = 12

I = √12

I ≈ 3.464

The radious of curvature of the motion of the proton while it is in the region containing the magnetic field is an important parameter that can be derived using the equations governing the motion of a charged particle in a magnetic field. This parameter is determined by the strength of the magnetic field and the velocity of the charged particle. The radius of curvature is defined as the radius of the circular path that the charged particle travels as it moves through the magnetic field.
The force on a charged particle moving through a magnetic field is given by the Lorentz force equation:

F = q (v × B)where F is the force, q is the charge of the particle, v is the velocity of the particle, and B is the magnetic field.
The force on a charged particle moving through a magnetic field is always perpendicular to both the magnetic field and the velocity of the particle. Therefore, the charged particle moves in a circular path with a radius of curvature r given by:
r = mv / qB
where m is the mass of the particle, v is its velocity, and B is the magnetic field strength.
In conclusion, the radius of curvature of the motion of the proton while it is in the region containing the magnetic field can be calculated using the equation r = mv / qB, where m is the mass of the proton, v is its velocity, and B is the magnetic field strength. This parameter is important in understanding the behavior of charged particles in magnetic fields and has many applications in fields such as particle physics, astrophysics, and plasma physics.

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Answer:

1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

In a reaction, reactants are the substances on which the reaction takes place. The reactants undergo changes to form the products.

Consider the following reaction:

C + O₂ ---> CO₂

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Answer:

Distance = 0.0052 m

Explanation:

Work =1.56J

Force = 300N

Distance = ?

Work=Force*Distance

1.56 J = 300N * Distance

1.56/300 = Distance

0.0052 m = Distance

Answer:

Fricción.

Explicación:

Caminando con otro compañero al mismo tiempo y al mismo ritmo, el movimiento se produce debido a la fricción del suelo y la suela de los zapatos porque la fricción es la fuerza que ayuda en el movimiento de los objetos de un lugar a otro. Si no hay fricción entre el suelo y la suela de los zapatos, no podemos dar un paso por lo que podemos decir que la fricción nos mueve hacia adelante.

Given that the time between when the marathon runner changes her velocity and the finish line is t, the acceleration of the runner approaching the finish line is 0.22/t m/s² .

The acceleration of a body is the change in the velocity of a body with time.

Acceleration is a vector quantity as it takes into account the change in velocity as well as the change in the direction of the body.

Hence, a body is accelerating if either or both of these two conditions apply:

Mathematically;

The change in velocity of a body = Final velocity - initial velocity

Change in velocity of the runner = 4.17 - 3.95

Change in velocity of the runner = 0.22 m/s

Time taken for this change = t

Hence;

acceleration = 0.22/t m/s²

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a. Formulation of nonlinear programming model: In this problem, the aim is to find the location of the refinery to minimize the total length of pipe required to connect the refinery to the ports. The distance between two ports is the Euclidean distance. Let us take an arbitrary point (x,y) as the location of the refinery.

Therefore, the distances between the refinery and the three ports are as follows:

Port A: distance √(x² + y²)

Port B: distance √((x-300)² + (y-400)²)

Port C: distance √((x-700)² + (y-500)²)

The decision variables in this problem are the location of the refinery, which can be represented by (x, y).c.

Set-up the objective function: The objective function is to minimize the total length of pipe required to connect the refinery to the ports.

Therefore, the objective function is as follows:

Minimize Z = √(x² + y²) + √((x-300)² + (y-400)²) + √((x-700)² + (y-500)²)

d. Interpretation of the negative value: In the optimal solution, if a decision variable has a negative value, it does not have any negative meaning. Decision variables can have positive, negative, or zero values depending on the problem.

In this problem, the decision variables represent the location of the refinery.

Therefore, if the optimal solution has a negative value for one of the decision variables, it means that the refinery is located on the negative side of the axis, which is perfectly fine.

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