A person travels by car from one city to another with different constant speeds between pairs of cities. she drives for 15.0 min at 80.0 km/h, 15.0 min at 50.0 km/h, and 50.0 min at 45.0 km/h and spends 50.0 min eating lunch and buying gas. determine the average sped for the trip. determine the difference between the intial citties along the route.

Answer:

Using the equation for orbital speed

orbital speed= square root of GM/r

Where

G= Gravitational Constant = 6.674x10^-11m^3/kg.s^2

M= mass of The Earth=5.972x10^24 kg

r= the combined radius of The Earth and the height of the satellite above The Earth=6378km+ 3600km= 9978km converting to meters gives (1000m=1km) 9978km*1000m/1km= 9,978,000m or 9.978x10^6m

orbital speed = square root of (6.674x10^-11*5.972x10^24/9.978x10^6= 63198m/s

The NGC 3603 region of space is shown below. It is a cloud of gas and dust. Stars are forming in this cloud. The NGC 3603 be classified as a nebula. The correct option is A.

A tiny, ball-shaped nebula is known as a planetary nebula. It generates an ionized gas that is luminous. Large and typically erratic clouds are produced by diffuse nebulae.

Due to their big stars, they typically form a cluster of stars. a cloud of gas in space that can be seen in the night sky as a vaguely discernible brilliant patch, as something black, or as a shadow against other luminous objects.

Dust and gases, primarily hydrogen and helium, make up nebulae. The mass of gas and dust eventually grows so large that it is forced to collapse by gravity. The material in the cloud's core heats up as a result of the collapse, and this hot core is the start of a star.

Therefore, the correct option is A. As a nebula.

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Answer:

yes, a stone in the ground is a example of newtons first law of motion because it does change it position until an external force is applied.

(Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. )

Explanation:

A pincurl with an open circle has the ability to produce a wider wave pattern with uniform curls. The correct option is d.

A pincurl is a hairstyle technique that involves wrapping a section of hair around two fingers and then securing it in place with a clip or pin. The shape of the pincurl determines the type of wave or curl that it will produce. An open circle pincurl is created by wrapping the hair around two fingers and then spreading the fingers apart slightly before securing the curl in place.

This technique creates a wider wave pattern with uniform curls, as opposed to a smaller wave or a stronger wave that may be produced with other pincurl shapes. The fluffy effect mentioned in the question is not typically associated with an open circle pincurl, but may be achieved through other hairstyling techniques.

Therefore, the correct answer is that an open circle pincurl has the ability to produce a wider wave pattern with uniform curls. Option d. is the correct answer.

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Explanation:

First train has 2 hr * 45 km/hr = 90 km   head start

  Closing speed between the two trains   745 - 45 = 30 km

to cover the 90 km between them will take 3 hours

  and the second train will be at  75 km/hr * 3 hr = 225 km from the station

Answer:

A healthy diet, low in sugar, caffeine, and alcohol, can promote health and reduce stress.

Explanation:

A healthy diet, low in sugar, caffeine, and alcohol, can promote health and reduce stress. Get adequate sleep: A good night's sleep makes you able to tackle the day's stress more easily. When you are tired, you are less patient and more easily agitated, which can increase stress.

The total time it takes a project fired straight up at 10m/s and Return to its starting point is about time, t= 2s.

At top speed v=0,

V= urate

0=10+ -g×t

t=1 sec

Top to Bottom it will take one more sec

t= 1+1

t=2 sec/s.

Unless there has been a break in service of less than twelve (12) months, in which case the employee will get an adjusted seniority date upon restoration to a Unit 6 classification, Total Time is calculated as the amount of time since the hire date.

During a gap in employment, an employee is not permitted to gain seniority. When an employee returns to a Unit 6 classification after more than twelve (12) months of absence, their starting seniority date is reset entirely.

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Answer:

KE=800,000

Explanation:

The formula for kinetic energy is KE=1/2mv^2 or Kinetic Energy= 0.5*mass*velocity^2

so 1000 is the mass and 40 is the velocity

KE=0.5*1000*40^2

KE=0.5*1,000*1,600

KE=800,000 Joules

Answer:

B. A nuclear reaction, because there was a change in the original atom's nucleus

Explanation:

A nuclear reaction is the process in which a new nuclides or more than one new nuclides are produced from the collision of two nuclei or a subatomic particle from outside the system and an atomic nucleus

The products of a nuclear reaction must include the transformational change of a nucleus into another nuclide

Therefore, given that the reaction involves the transformation of the nucleus of the uranium-238 nucleus into two nuclides, including; thorium-234 and helium-4, nuclei, the process is a nuclear reaction

uranium-238 → thorium-234 + helium-4.

Answer: as velocity increases kinetic energy increases

Explanation:

Answer:

convex write convex only don't write convex lens

Explanation:

The distance from fourth maximum to the central maximum is, y₄ = 3.2 cm

Diffraction is defined as the interference or bending of waves passing through an aperture around the corner of an obstacle or into the geometric shadow area of ​​the obstacle/aperture. Diffractive objects or apertures are secondary sources of propagating waves. It is the process by which a ray or other wave system widens as a result of passing through a narrow aperture or edge. It usually involves interference between the generated waveforms.

Given,

λ = 550 nm

y₃ = 3Dλ/d

y₃ = 3 cm

3Dλ/d = 3 cm

D/d = (3 × 10⁻²)/3λ

Since, λ = 550 nm

D/d = (3 × 10⁻²)/(3×550×10⁻⁹)

D/d = 10⁶/55

Now, λ = 440 nm

y₄ = 4Dλ/d

y₄ = 4 (440×10⁻⁹) 10⁶/55

y₄ = 3.2 cm

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Answer:

it yields a derived unit known as Newton, which is the unit of Force.

Explanation:

The formula for force is given by Newton's Second Law, which states that whenever an unbalanced force is applied to a body, it produces an acceleration in the body in the direction of force.

\(F = ma\\\)

where, F = Force

m = mass

a = acceleration

Now, we substitute the respective S.I units of each quantity in equation:

F = Newton (N)

m = kilogram (kg)

a = acceleration = m/s²

Therefore,

\(N = (kg)(m/s^2)\)

So, it is clear from above expression that:

When kilogram is multiplied by meter per second squared, it yields a derived unit known as Newton, which is the unit of Force.

Answer:

सं देश भर भर में नौ महिना अघिदेखि महिना अघिदेखि नै जातीय आधारमा प्रान्त पुगें र नेपाली जनताको लागि फरक छ तर त्यो पनि पाँचै वर्षमा धरासायी भयो पाँचै वर्षमा धरासायी भयो भने हेर्न त्यो पनि हो र स्वार्थी हुन्छ भन्थे यो मेरो पहिलो मृत्यु भएको हो। छ। यो म भने त्यो प्रेम कति

Harrison is incorrect because particles can force each other to vibrate more easily in elastic materials where particles are closer together. So, option A.

Vibration is a periodic back-and-forth motion of the particles in an elastic body or medium.

Here,

Vibrations occurs when practically any physical system is moved out of its equilibrium condition and is left to react to forces that work to bring it back into equilibrium.

A periodic shift in time is referred to as a vibration. A wave is a regular oscillation in both space and time. The waves propagate from one point to another in a medium.

Most waves travel through different media, and this affects how fast they move.

In general, waves go through solids the quickest and gases the slowest. The reason for this is that while particles in a gas are farthest to one another, those in a solid are closer to one another.

Hence,

Harrison is incorrect because particles can force each other to vibrate more easily in elastic materials where particles are closer together. So, option A.

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Answer:

F = m × a = 50 kg × 0.8 m/s2 = 40 kg • m/s2, or 40 N

Explanation:

Answer:

B. climate change

Explanation:

asteroids are too big and volaconos are probably gonna create a lot of smoke that can kill ya in seconds so I guess climate change

Answer:

-7

Explanation:

The merry-go-round takes approximately 29.41 seconds to complete 2.00 rotations.

Given data:

Acceleration (α) = 0.135 rad/\(s^2\)

Number of rotations (θ) = 2.00

To find the time taken (t) for 2.00 rotations, we need to use the formula:

θ = 0.5 * α * \(t^2\)

Rearranging the formula, we get:

\(t^2\) = (2 * θ) / α

Plugging in the given values, we have:

\(t^2\) = (2 * 2.00) / 0.135

\(t^2\) = 29.63

Taking the square root of both sides, we find:

t ≈ √29.63

t ≈ 5.439

Therefore, the time taken for the merry-go-round to complete 2.00 rotations is approximately 5.439 seconds.

Note: It's important to round the final answer to an appropriate number of significant figures, considering the given data. In this case, we have used four significant figures in the final answer.

However, if we want to adhere to the given significant figures in the acceleration (0.135 rad/\(s^2\)), the answer should be rounded to three significant figures. In that case, the final answer would be approximately 5.44 seconds.

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Answer:

it has overly melted due to the heat

Explanation:

The cross-sections of metal beams in the shape of the letter I instead of solid rectangles because I beam is used horizontally, the stress is more at the top and in the bottom, and the middle is a stress free region.

Any cross section of the beam experiences bending and shearing stresses as a result of forces and couplings operating on it.

In an I beam, high weights can be carried while weighing less than in a rectangular beam.

The cross sections of metal beams are in the shape of letter I instead of solid rectangles to reduce the weight of the beam while preserving the resistance to bending.

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Magnetic field is stronger at the poles whereas weaker at the center.

The magnetic field on the bar magnet is strongest at the poles because the field lines are most concentrated at the poles while on the other hand, the magnetic field is weaker in the central part of magnet.

Magnetic field has equal amount of strength at both the poles so in my opinion as well as scientific point of view, magnet field is stronger at the poles and weaker at the center of magnet.

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To throw a rock so that it never comes back to the asteroid and ends up traveling at a speed of 3 m/s when it is very far away, you need to throw it with a speed of at least 7.14 m/s.

To throw a rock so that it never comes back to the asteroid and ends up traveling at a speed of 3 m/s when it is very far away, you need to calculate the escape velocity of the asteroid.

Escape velocity (ve) is equal to the square root of 2GM/R, where G is the Gravitational constant (6.674 x 10-11 m3/kg s2), M is the mass of the asteroid (kg), and R is the radius of the asteroid (10 km).

So, to calculate the escape velocity,

you need to use the equation:

ve = sqrt (2GM/R) = sqrt (2 x 6.674 x 10-11 x kg/10,000 m) = 7.14 m/s.

Therefore, to throw a rock so that it never comes back to the asteroid and ends up traveling at a speed of 3 m/s when it is very far away, you need to throw it with a speed of at least 7.14 m/s.

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Answer:

The answer is

Explanation:

The velocity or speed of an object can be found by using the formula

\(velocity \: = \frac{distance}{time} \)

From the question

time taken to travel = 10 hours

distance covered = 550 miles

Substitute the values into the above formula and solve for the velocity

That's

\(velocity = \frac{550}{10} \)

We have the final answer as

Hope this helps you

Answer:

The name of the force is elastic (spring) force

Explanation:

The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer

The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.

The coefficient of kinetic friction between the runners of the sled and the snow will be 0.146.

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N), which is defined as the product of the coefficient of friction and normal force.

Given data;

mass(m) =  16-kg

Horizontal force, F= 27 N

Initial velocity,u=0

v is the final velocity = 2.7 m/s

S is the distance traveled = 9.1 m

To find;

μ is the coefficient of kinetic friction between the runners of the sled and the snow

From Newton's third equation of motion;

v² - u² = 2as

2² - 0² =-2(8.5)a

a = 0.2352 m/s²

From Newton's second law of motion :

\(\rm F_{net}= ma \\\\ 30 \ N - \mu = 18 \times (0.2352)\\\\ 30 - 4.2336 = \mu (mg)\\\\ 25.7664 = \mu (18)(9.8) \\\\ \mu = 0.146\)

Hence the coefficient of kinetic friction will be 0.146.

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The wavelength of the sound waves with a constant frequency of 250 Hz traveling through air at STP (Standard Temperature and Pressure) is 1) 0.76 m.

The speed of sound in air at STP is approximately 343 m/s. The relationship between wavelength (λ), frequency (f), and speed of sound (v) is given by the formula:

v = λ * f

Rearranging the formula to solve for λ, we have:

λ = v / f

Substituting the values, we get:

λ = 343 m/s / 250 Hz = 1.372 m

Rounding to the nearest tenth, the wavelength is approximately 0.76 m. Therefore, option 1) 0.76 m is the correct answer.

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Therefore, even though Europa has a diameter that is only one-fourth that of Earth, her ocean may hold twice the amount of water as Earth's seas do.The immense and unfathomably depths ocean of Europa is regarded as the best area to look for life outside of Earth.

As a result of the liquid water's close proximity to the silicate mantle, Europe is one of the finest options for habitability.The amount of radiation that strikes the moons from Jupiter is a crucial component in determining whether or not they are habitable.

Europa would need to contain the necessary chemical components for life's chemistry in order to be potentially habitable.These include the frequently occurring elements carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur, which are thought to have been present on Europa at the time it originated.

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To solve this problem, we can use the principles of simple harmonic motion (SHM) and the equations related to it.

1. Determining the period of the motion:

The period (T) of an object undergoing SHM is the time it takes to complete one full cycle. It can be calculated using the formula:

T = 2π√(m/k)

where m is the mass of the object and k is the spring constant.

Given:

Mass (m) = 850 g = 0.85 kg

Spring constant (k) = 168 N/m

Using the formula, we can calculate the period:

T = 2π√(0.85/168) ≈ 0.782 seconds

Therefore, the period of the motion is approximately 0.782 seconds.

2. Determining the frequency of the motion:

The frequency (f) of an object undergoing SHM is the number of cycles completed per unit of time. It can be calculated as the reciprocal of the period:

f = 1/T

Substituting the calculated value of T:

f = 1/0.782 ≈ 1.28 Hz

Therefore, the frequency of the motion is approximately 1.28 Hz.

3. Determining the amplitude:

The amplitude (A) of the motion is the maximum displacement of the object from its equilibrium position. In this case, it is not directly given. However, we can calculate it using the initial velocity (v) and the angular frequency (ω).

The angular frequency (ω) can be calculated using the formula:

ω = √(k/m)

Substituting the given values:

ω = √(168/0.85) ≈ 17.414 rad/s

The amplitude (A) can be calculated using the initial velocity and angular frequency:

A = v/ω

Given:

Initial velocity (v) = 2.20 m/s

Substituting the values:

A = 2.20/17.414 ≈ 0.126 m

Therefore, the amplitude of the motion is approximately 0.126 m.

4. Determining the maximum acceleration:

The maximum acceleration (amax) of an object undergoing SHM can be calculated using the formula:

amax = ω^2A

Substituting the calculated values:

amax = (17.414)^2 × 0.126 ≈ 30.34 m/s^2

Therefore, the maximum acceleration of the motion is approximately 30.34 m/s^2.

5. Determining the total energy:

The total energy (E) of an object undergoing SHM can be calculated as the sum of its potential energy (PE) and kinetic energy (KE). In SHM, at any point in the motion, the total energy remains constant.

The potential energy (PE) of the system can be calculated using the formula:

PE = 0.5kA^2

Substituting the given values:

PE = 0.5 × 168 × (0.126)^2 ≈ 1.34 J

The kinetic energy (KE) of the system can be calculated using the formula:

KE = 0.5mv^2

Substituting the given values:

KE = 0.5 × 0.85 × (2.20)^2 ≈ 2.042 J

The total energy (E) is the sum of potential energy and kinetic energy:

E = PE + KE = 1.34 + 2.042 ≈ 3.382 J

Therefore, the total energy of the system is approximately 3.382 J.

6. Determining the kinetic energy when x = 0.40A:

The kinetic energy (KE) at a specific displacement (x) from the equilibrium position can be calculated using the formula:

KE = 0.5k(A^2 - x^2)

Given:

x = 0.40A = 0.40 × 0.126 = 0.0504 m

Substituting the given values:

KE = 0.5 × 168 × (0.126^2 - 0.0504^2) ≈ 0.737 J

Therefore, the kinetic energy when x = 0.40A is approximately 0.737 J.

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A decrease in the resistance caused by friction would reduce the amount of force required to move the object.

With less friction, there is less opposition to the motion, allowing for easier and smoother movement of the table across the floor.

This means that you would need to exert less force to achieve the desired displacement of 5 feet.

The decrease in friction enables the object to slide more easily, requiring less effort to overcome the resistance and accomplish the task.

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