a person is standing on a railroad station platform when a high speed train passes by. the person will tend to be

Given the time and distance covered, the rockets travels with a speed of 616.67m/s.

Given the data in the question:

Speed of the rocket; \(v = \ ?\)

Speed is simply the time rate at which a particle or object is moves along a path. It is expressed as:

Speed = Distance ÷ Times

\(v = \frac{s}{t}\)

We substitute our given values into the equation

\(v = \frac{185000m}{300s}\\\\v = 616.67m/s\)

Therefore, given the time and distance covered, the rockets travels with a speed of 616.67m/s.

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Answer:

2 m/s²

Explanation:

Given:

v₀ = 0 m/s

v = 20 m/s

t = 10 s

Find: a

a = (v − v₀) / t

a = (20 m/s − 0 m/s) / 10 s

a = 2 m/s²

Answer:

never scared

that might help you

Answer:

a

Explanation:an example An astronaut in space has the same mass as he does on earth while having different ... Newton's Second Law of Motion: Force = mass x acceleration ... Push less to move it (use less force.) ... Gravity has an effect on an object in the vertical direction only.

Answer:

it is a greater

Explanation:

hope it helps

The formula for calculating density is expressed as

Density = mass/volume

From the information given,

mass of empty pycnometer = 10.2

mass of the same pycnometer with an unknown liquid is 21.8.

Mass of unkown liquid = 21.8 - 10.2 = 11.6

volume of unknown liquid = 7

Thus,

Density = 11.6/7

Density = 1.7 g/ml

Spherical aberration in the primary mirror of a reflecting telescope is generally avoided by making the mirror surface a parabolic shape.

Spherical aberration in the primary mirror of a reflecting telescope is a significant issue that can affect image quality. This problem arises when light rays entering the telescope at different distances from the central axis converge at different points, leading to a blurred image. To avoid spherical aberration, telescope designers typically use a parabolic-shaped mirror instead of a spherical one.

A parabolic mirror ensures that all incoming light rays, regardless of their distance from the central axis, converge at a single focal point. This results in a sharp and clear image, free from the distortion caused by spherical aberration. In contrast, using a spherical mirror would cause the light rays to converge at multiple points, leading to a blurry image.

It is important to note that other factors, such as the refraction of light by turbulent currents of air with differing densities, can also cause image distortion. These atmospheric effects, however, are not directly related to the telescope's mirror shape.

In some advanced telescope systems, rapidly changing the tilt and shape of an intermediate mirror can help compensate for atmospheric disturbances. This adaptive optics technique allows for improved image quality by correcting for the atmospheric distortions in real-time. Nevertheless, the primary mirror's parabolic shape remains crucial for avoiding spherical aberration and maintaining optimal image clarity in a reflecting telescope.

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Answer:

Explanation:

Let lift force F be created by propellers at angle of Ф with the horizontal .

The vertical component of this force will balance the weight of helicopter and horizontal component will balance the air resistance .

F sinФ = mg = 2750 x 9.8 = 26950 N

F cosФ = 7510 N

Squaring and adding ,

F² = 26950² + 7510²

= 726302500 + 56400100

= 782702600

F = 27976.82 N .

Answer:

Yes,it can be mixed.

Explanation:

Revolution and rotation are the terms that describe the different movements of the earth.

Our home planet is Earth. Earth and its moon, according to scientists, originated about the same period as the rest of the solar system.

That would have been around 4.5 billion years ago, according to scientists. Earth is the solar system's fifth-largest planet.

The rotation and revolution of the earth are two different movements. The movement of the earth on its axis is known as rotation.

Revolution is the movement of the earth around the sun in a fixed route or orbit. The earth's axis, which is an imaginary line, forms a 6612° angle with its orbital plane.

Hence revolution and rotation are the terms that describe the different movements of the earth.

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Answer:

Zero

Explanation:

Zero....  Inertia states a body in motion will remain in motion unless acted on by external forces.... no friction forces means it needs no force to keep going

Recall the concepts about kinetic and potential energies.

Kinetic energy = The energy due to the motion of the object

Potential energy = The energy due to the position of the object.

Position 1:

At this position, the kinetic energy is minimum due to the non-motion of the roller coaster but the potential energy is maximum due to the height.

Position 3:

At this position, the potential energy is minimum since the height is almost zero but the kinetic energy is maximum due to the motion.

Position 2:

The kinetic and potential energy of the roller coaster car will be equal to each other at a point that is halfway between positions 1 and 3 that is position 2.

At this point, the roller coaster has enough motion and height such that kinetic and potential energy will be equal to each other.

The kinetic energy is increasing and the potential energy is decreasing but at position 2, they will be equal.

Answer:

Ep =mgh

Ep=(6.2)(9.8)(12.3)

Ep=747.35 J

The mass of lead = 22,939 kg

Given

mass alcohol=1600 kg

The density of lead =11300kg\m³ and density of alcohol=790kg\m³

Required

mass of lead

Solution

\(\tt V=\dfrac{mass}{\rho}\\\\V=\dfrac{1600}{790}\\\\V=2.03~m^3\)

the volume of lead=volume of alcohol=2.03 m, so the mass of lead :

\(\tt m=\rho\times V\\\\m=11300\times 2.03\\\\m=22,939~kg\)

Answer:

well his enemies accused him of attacking scripture and meddling affairs

Explanation:

pls tell me if is right

Miranda, one of Uranus's moons, displays the widest range of surface terrains, suggesting some catastrophic disruption.

Miranda is the smallest and innermost of the five major moons of Uranus. It is known for its highly varied and fragmented surface, which indicates a history of intense geological activity.

The range of surface terrains observed on Miranda suggests that it has undergone significant cataclysmic disruptions in its past.

One prominent feature on Miranda is the "Coronae," which are large and distinct regions of tectonic activity. These coronae are characterized by parallel ridges and valleys that have been folded and deformed, indicating intense geological forces.

The presence of these coronae suggests that Miranda experienced extreme tectonic activity, likely as a result of past catastrophic disruptions.

Another noteworthy feature on Miranda is the "Verona Rupes," a massive cliff that reaches heights of up to 20 kilometers (12 miles). This cliff is one of the tallest known in the solar system, suggesting significant tectonic forces that may have caused the crust to crack and shift, resulting in such a dramatic geological feature.

The wide range of surface terrains observed on Miranda, including the presence of coronae and the massive Verona Rupes cliff, strongly indicates that this moon has experienced catastrophic disruptions in its past.

These disruptions likely involved intense tectonic activity, resulting in the deformation and fragmentation of Miranda's surface. The unique geological features on Miranda provide valuable insights into the complex history and dynamics of the Uranian moon system.

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(a) The force of friction increases as the applied force increases.

(b) The force of friction at each value of X (applied force ) can determined by subtracting the net force on the block from the  applied force.

The coefficient of static friction is the ratio of the maximum static friction force between the surfaces in contact before movement commences to the normal force.

Mathematically, the coefficient of static friction is given as;

μ = F/N

where;

Before the block start moving, the static friction must be overcame since it prevents the block from moving.

The net force on the block is determined by applying Newton's second law of motion.

F - Ff = ma

F = ma + Ff

where;

From the formula above, as the applied force increases the force of friction increases as well.

The force of friction at each value of X (applied force ) is calculated as follows;

Ff = F - ma

Ff = F - F(net)

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The addition of dielectric in a capacitor reduces the effective charge on the plate and hence increases capacitance.

Because capacitance is connected to the dielectric constant k, the capacitance of a capacitor increases when a dielectric is put between its plates.

The introduction of a dielectric substance increases the capacitance of a set of charged parallel plates. The capacitance between the plates is inversely proportional to the electric field between them, and the dielectric decreases the effective electric field.

Enhance the surface area, lower the gap between the plates, and utilize a dielectric material to increase the capacitance of a parallele plate capacitor.

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Answer:

12.7 m

Explanation:

The following data were obtained from the question:

Initial velocity (u) = 56.7 Km/hr

Maximum height (h) =..?

First, we shall convert 56.7 Km/hr to m/s. This can be obtained as follow:

Initial velocity (m/s) = 56.7 x 1000/3600

Initial velocity (m/s) = 15.75 m/s

Next, we shall determine the time taken to get to the maximum height. This can be obtained as follow:

Initial velocity (u) = 15.75 m/s

Final velocity (v) = 0 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

v = u – gt (since the ball is going against gravity)

0 = 15.75 – 9.8 × t

Rearrange

9.8 × t = 15.75

Divide both side by 9.8

t = 15.75/9.8

t = 1.61 secs.

Finally, we shall determine the maximum height as follow

h = ½gt²

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) = 1.61 secs.

Height (h) =..?

h = ½gt²

h = ½ × 9.8 × 1.61²

h = 4.9 x 1.61²

h = 12.7 m

Therefore, the maximum height reached by the ball is 12.7 m

The Balmer series is a set of emission spectral lines of the hydrogen atom that results from electron transitions from the n = 3 state to the n = 2 state.

The wavelengths of the first five lines of the Balmer series can be calculated using the Rydberg formula.

The formula can be written as:

1/λ = R(1/4 − 1/n²)

where,

R is the Rydberg constant,

n is the principal quantum number of the higher energy level,

λ is the wavelength of the emitted photon.

The first five lines of the Balmer series have n values of 3, 4, 5, 6, and 7.

Plugging these values into the Rydberg formula gives the following wavelengths:

Line 1 (n = 3 → 2): λ = 656.3 nm

Line 2 (n = 4 → 2): λ = 486.1 nm

Line 3 (n = 5 → 2): λ = 434.0 nm

Line 4 (n = 6 → 2): λ = 410.2 nm

Line 5 (n = 7 → 2): λ = 397.0 nm

The wavelengths of the first five lines of the Balmer series are in the visible part of the electromagnetic spectrum.

The wavelengths range from 656.3 nm (red) to 397.0 nm (violet).

Therefore, the first five lines of the Balmer series are part of the visible spectrum.

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The main factor that affects the amount and duration of geological activity on a terrestrial planet is its internal heat. This heat is generated through various processes such as radioactive decay and residual heat from planetary formation.

The presence of a molten core and active mantle circulation contributes to geological activity, including tectonic plate movements, volcanic eruptions, and mountain building. Other factors like the planet's size, composition, and distance from the Sun can also influence geological activity to some extent.

The main factors that affect atmospheric conditions on a terrestrial planet are its distance from the Sun, the composition of its atmosphere, and the presence of greenhouse gases. The proximity to the Sun determines the amount of solar energy received, which affects temperature and weather patterns. The composition of the atmosphere, including the presence of gases like oxygen, nitrogen, carbon dioxide, and water vapor, determines the planet's climate and the ability to support life. Greenhouse gases trap heat in the atmosphere, contributing to the greenhouse effect and influencing temperature regulation.

Based on what we know about the factors that affect geologic activity and atmospheres on terrestrial planets, we can expect that typical Jovian moons, being small rocky-metal bodies, would have limited geological activity and thin atmospheres, if any. The smaller size of these moons compared to terrestrial planets means that they have a lower heat-producing capability and less internal energy. Additionally, their lower gravitational forces make it challenging to retain substantial atmospheres. While some Jovian moons may have evidence of geological activity, such as cryovolcanism or tidal heating, they generally exhibit less dynamic geologic and atmospheric conditions compared to larger terrestrial planets.

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Kia will recall 71,000 Sportage vehicles from the 2008–2009 model year in the United States that were previously recalled in 2016 due to fire concerns. Owners are advised to park outdoors while repairs are finished.

Due to concerns that they could catch fire if parked inside, more than 280,000 Hyundai and Kia vehicles have been recalled. The fault, according to the manufacturers, resulted in 25 flames or melting occurrences in the United States and Canada, but no accidents or injuries.

The 2021-2022 Sorento and 2021-2023 K5 are among the vehicles that Kia Motors, Inc. (Kia) is recalling. A malfunctioning transmission oil pump may cause the vehicle's "fail-safe" limited-mobility drive mode to become less effective, which could cause a total loss of drive power. A crash is more likely if drive power is lost.

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Answer:

A) Availability

Explanation:

Right on Edge 2021

Answer:

Availability

Explanation:

edge

Answer:

390000

Explanation:

The momentum is huge. You wouldn't want this thing to hit you.

Momentum = m*v

m = 13000 kg

v = 30 m/s

Momentum = 13000 * 30

Momentum = 390000 kg m/s

Answer:

anything stationary

Explanation:

anything that is not moving outside the train like passing trees or the train's station is considered to be a frame reference.

The answer is B.  \(1.9 × 10^-4 J\)when A charge of 24 µC is at a location where the electric potential is 8.0 V.

Electric potential, also known as voltage, is a scalar physical quantity that describes the amount of electric potential energy per unit charge present at a point in space or at a point in an electric circuit. It is measured in volts (V).

The electric potential energy of a charge q in an electric potential V is given by the equation:

U = qV

where U is the electric potential energy in joules (J), q is the charge in coulombs (C), and V is the electric potential in volts (V).

Using this equation and the given values, we can calculate the electric potential energy of the charge:

\(U = (24 × 10^-6 C) × (8.0 V) = 1.9 × 10^-4 J\)

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The formula for horizontal distance is x = Vx * t, where t is the time. The formula for vertical distance from the ground is y = h + Vy * t - g * t2 / 2, where g is the acceleration of gravity.

What is the free fall equation?

Where g is the acceleration of gravity, vf is equal to g * t. On Earth, the value of g is 9.8 m/s/s. The velocity of the object after being dropped from rest for any given period of time can be calculated using the aforementioned equation.

How is height determined?

At the spot where the ruler, book, or other flat object meets your head, lightly mark the wall with a pencil. Measure the distance from the floor to the mark on the wall using a tape measure, preferably one made of metal that will stay straight.

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Answer:

In order to minimize the uncertainty in the period, we measured the time for the pendulum to make 20 oscillations, and divided that time by 20

Explanation:

The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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If 500J of work is required to compress the gas to half its initial volume, then 900J of work is required to compress the gas by a factor of 10.

Relation between work done and change in volume:

The relation between work done, pressure and volume is given by,

Work done = Pressure x Change in Volume

If 500 J of work is required to compress the gas to half its initial volume, we can use the equation:

Work done = Pressure x Change in Volume

Since the temperature is constant, we can assume that the pressure remains constant as well. Therefore, we can write:

500 J = P x (Vi/2 - Vi)

where Vi is the initial volume of the gas and P is the constant pressure.

Simplifying the equation, we get:

500 J = P x (Vi/2)

P = (1000 J/m³) / Vi

Now, we can use the same equation to find the work required to compress the gas by a factor of 10:

Work done = P x Change in Volume

Let's call the final volume Vf. We know that Vf = Vi/10. Therefore:

Work done = P x (Vi - Vf)

Work done = P x (Vi - Vi/10)

Work done = P x (9Vi/10)

Substituting P = (1000 J/m³) / Vi, we get:

Work done = (1000 J/m³) x (9Vi/10) / Vi

Work done = 900 J

Therefore, 900 J of work must be done to compress the gas by a factor of 10, starting from its initial volume.

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