what is the approximate coefficient of kinetic friction between the tracks and the wheels of the trolley?

In terms of your practical experiences making anything move in a circle, the connection makes physical sense and explains the mass and speed are in the numerator and why the radius is in the denominator. With regard to units, the relationship makes sense.

The acceleration of a body traveling in a circular route is known as centripetal acceleration. Because velocity is a vector quantity. It has both a magnitude and a direction.

When a body moves on a circular route, its direction changes constantly, causing its velocity to vary, resulting in acceleration.

The force needed to move a body in a curved way is understood as centripetal force. This is a force that can be sensed from both the fixed frame and the spinning body's frame of concern.

The direction of centripetal force is always in the path of the center of the course.

The centripetal force is found as;

\(\rm F_c = \frac{mv^2}{r}\)

Unit analysis;

\(\rm F_c = \frac{mv^2}{r} \\\\ \rm N = \frac{kg ( \frac{m}{sec})^2 }{m} \\\\\ 1 N = 1 kg \frac{m }{s^2}\)

Hence with regard to units, the relationship makes sense.

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An unmanned spacecraft leaves for Venus. The statements, The weight of the spacecraft keeps changing and The mass of the spacecraft remains the same. This 2 statements A and D are true.

A spaceship is a machine or vehicle built to travel through space. Spacecraft are a form of artificial satellite utilised for a wide range of tasks, such as communications, Earth observation, meteorology, navigation, space colonisation, planetary exploration, and freight and person transfer. All spacecraft, with the exception of single-stage-to-orbit vehicles, need a launch vehicle (carrier rocket) to get into space.

A spacecraft that is performing a sub-orbital spaceflight launches into space and then lands without gaining enough momentum or energy to complete a full orbit of the Earth. Spacecraft enter confined orbits around the Earth or other celestial bodies for orbital spaceflights. Only humans are carried on human spacecraft either as crew or guests from launch or while in orbit (space stations).

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The statement that is false is "there are places on earth where all forces are absent." Forces, such as gravity, are always present on Earth.

All the given statements are true except the statement "there are places on earth where all forces are absent." is false.

Forces change the momentum of a body,forces always occur in equal and opposite pairs (Newton's third law), where there is no force, objects continue to move the way they were moving, and forces cause an acceleration to take place are all true statements about forces.

Newton's third law simply states that there is an equal and opposite reaction to every action. So, if object A exerts a force on object B, object B will exert an equal but opposite force on object A.

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Answer:

Kiko writes a roport to compare and contrast the code of plants and animals. Which of the following statements is accurato arvd bolony in Kiko's report?

The cell membrane of animals is much tickow than those in plants

Vaculos in plants are much larger than those in animals

Animal colls do not have chromosomos

Plant colls do not have chloroplasts

a) The unit vector in the direction of a is (0.993, 0.117).

b) The Cartesian vector representing the force is (24.825, 2.925).

c) The mechanical work done is 275 Joules.

The unit vector in the direction of vector a can be found by dividing vector a by its magnitude. In this case, vector a = [6, 1], so the magnitude of a is √(6² + 1²) = √37. Dividing vector a by its magnitude yields (6/√37, 1/√37), which simplifies to approximately (0.993, 0.117).

To find the Cartesian vector representation of the force, we multiply the unit vector from part a) by the magnitude of the force, F = 25 N. The result is (0.993 * 25, 0.117 * 25), which simplifies to (24.825, 2.925).

To determine the mechanical work done, we use the formula W = F * d * cos(θ), where W is the work done, F is the force, d is the displacement, and θ is the angle between the force and displacement vectors.

In this case, the force is F = 25 N, and the displacement is the difference between the x-coordinates of the two points, which is 15 - 4 = 11 meters. Since the force and displacement are in the same direction (θ = 0°), cos(θ) = 1.

Plugging in the values, we get W = 25 * 11 * 1 = 275 Joules.

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Answer: A.

Explanation:

Solar eclipse happens when Sun casts a shadow directly on Earth and the Moon. Option A is correct.

A solar eclipse occurs when the Sun throws a shadow directly on Earth and the Moon.

When the Sun throws a shadow directly on the Earth and the Moon, it is called a solar eclipse.

Hence,option A is correct.

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Answer:

im guessing red giant-

Answer:

Explanation:

distance = speed * time  

distance = 21000 * 5 = 105000 km

please mark me as Brainliest

Answer:

Answer is B.

Because the wavelength of infrared is shorter than microwave radiation

The average velocity of the pirates is 1.44 miles/hr.

A vector quantity is an average velocity. The change in position or displacement (x) divided by the time intervals (t) in which the displacement happens yields the average velocity. Depending on the sign of the displacement, the average velocity can be positive or negative. Meters per second (m/s or ms-1) is the SI measure of average velocity.

total time = t₁ + 1 + t₂

T = 1 + 1 + 3

T = 5hr

Displacement = AC = √(4² + 6²)

S = √16+36

S = √52

Average velocity = Displacement/ Time

v = S/t

substituting the value in the above equation, we get

v = 7.2/5

v = 1.44 mile/hr

Thus, the average velocity of the pirates is 1.44 miles/hr.

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Answer:

A

Explanation:

i just did this on usatestprep the answer A

The acceleration of the sled of mass 300 kg is 0.57 m/s².

Acceleration is the rate of change of the velocity of a body.

To calculate the acceleration of the sled, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the acceleration of the sled is 0.57 m/s².

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Dragonflies are most closely related to carpenter flies. They are known as flies of the family Odonata, which means "toothed ones."

Odonates are divided into two main groups: dragonflies (Anisoptera) and damselflies (Zygoptera). Dragonflies are characterized by their large wingspans, strong flight muscles, and toothed jaws.

Dragonflies and carpenter flies are the two members of the Odonata family that share a common ancestry. Carpenter flies belong to the family Xylophagidae, which is part of the larger order of true flies, Diptera. They are mostly seen as long-legged, hairy flies with long snouts. Carpenter flies are harmless to humans and feed on nectar, whereas dragonflies are predators that feed on other insects. Their jaws are designed to tear and shred their prey apart. They are able to fly at high speeds and manoeuvre with agility to catch their prey. This ability to fly is due to their powerful flight muscles, which occupy up to 90% of their body weight. They are known for their swift and graceful movements, which make them a fascinating species to study.

In conclusion, dragonflies are most closely related to carpenter flies. This is based on the fact that both species belong to the Odonata family. Carpenter flies are characterized by their long legs and snouts, while dragonflies are characterized by their large wingspans, toothed jaws, and predatory behavior. Dragonflies are known for their incredible agility, speed, and grace, and they are an important part of the ecosystem as predators of other insects.

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The time constant of the circuit can be determined from the formula τ = RC. The values given in the question are R = 4.00 MΩ and C = 3.00 µF. Thus, the time constant is given as:τ = RC = (4.00 × 10^6 Ω) × (3.00 × 10^-6 F) = 12 secondsb. The current in the circuit can be found by using Ohm’s law, which states that I = V/R, where V is the voltage across the circuit.

The voltage across the circuit is 12.0 V, so the current is given as:I = V/R = (12.0 V)/(4.00 MΩ) = 3.00 µAThe charge on the capacitor as a function of time can be found using the formula Q = Qmax (1 - e^(-t/τ)), where Qmax is the maximum charge that can be stored by the capacitor. The maximum charge can be found using the formula Qmax = CV, where V is the voltage across the capacitor.

The voltage across the capacitor is the same as the voltage across the circuit, which is 12.0 V. Thus, the maximum charge that can be stored by the capacitor is:Qmax = CV = (3.00 × 10^-6 F) × (12.0 V) = 36 µCThe charge on the capacitor as a function of time is given as:Q = Qmax (1 - e^(-t/τ)) = (36 µC) (1 - e^(-t/12)).

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Answer:

a= kinetic energy vs. different masses at same speed, b= kinetic energy vs. same masses at different speeds

Explanation:

graphs are looking at speed so masses don't matter as much. same speed the whole time will equal same kinetic energy the whole time.

The process is non-stationary because these are greater than one in modulus.  The forecasts of Yn+1, Yn+2, Yn+3 is 3 +0.9 (115.76) + 0.1(111.38) +0 - 0.2(En)

i) We are given the ARMA(2,1) model as follows:

Yt=3+0.9Yt-1+0.1Yt-2+Et-0.2Et-1

To check if the process is stationary, let us find the roots of the characteristic equation.

1-0.9B-0.1B²=0

Solving, we get B = 1.05, -0.4762

These are greater than one in modulus.

Therefore, the process is non-stationary.

ii) We are given the values Yn−2 = 101, Yn−1 = 99.5, Yn = 102.3 and En-1 = 1.

2. The model equation is

Yn = 3+0.9Yn-1+0.1Yn-2+En-0.2En-1

Substituting the given values, we get

Yn = 3+0.9(99.5)+0.1(101)+1.2-0.2(-1.2)

= 106.58

To find Yn+1, Yn+2, Yn+3, we need to use the model equation.

Yn+1=3+0.9Yn+0.1Yn-1+En-0.2En-1

Substituting the value of Yn, we get

Yn+1=3+0.9(106.58)+0.1(99.5)+1.2-0.2(1.2)

= 111.38

Similarly,Yn+2=3+0.9Yn+1+0.1Yn+En-0.2En-1

=3+0.9(111.38)+0.1(106.58)+1.2-0.2(1.2)

= 115.76Yn+3

=3+0.9Yn+2+0.1Yn+1+En-0.2En

=3+0.9(115.76)+0.1(111.38)+0-0.2(En)

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Answer:

Artery and viens

Explanation:

Answer:

The proper answer for this question would be B. Beta Decay

Explanation:

I hope this helps

The energy of the wavelength of the photon is 258 m.

Given:

f = 1160 kHz = 1160 x 10³ Hz

The velocity is c = 3 x 10⁸ m/s, the velocity of light (approximately).

The reflectance curve for a white piece of paper would reflect Long, medium and short wavelengths equally.

white piece paper serves as perfectly reflective surfaces and reflects all the incident radiations without any absorbtion or transmission. Hence a white piece of paper would reflect Long, medium and short wavelengths equally.

ultra violet rays has larger wavelength than radio waves.

As we know that the energy is inversely proportional to the wavelength.

The energy of radio waves is more than the energy of ultra violet waves.

Energy of ultra violet photons < Energy of radio waves

Wavelength of ultra violet photons > Wavelength of radio waves

Wavelength(lambda) is the distance between one peak to the next peak or one trough to another trough parallel to the direction of propagation.

Calculate the wavelength, λ.

V = f λ

V is the speed

F is the frequency  

F λ is wavelength  

c = fλ

λ = c/f = (3 x 10⁸ m/s)/(1160 x 10³ 1/s) = 258 m

Therefore the energy of the wavelength of the photon is 258 m.

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[NOTE: THIS QUESTION IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1160 kilohertz? What is its energy?]

Velocity of moving vehicle=v  0, and decceleration =a and Final velocity of the vehicale =0.

Once more, the stopping distance is far more than the braking distance. It starts when the threat is identified and concludes when the car stops.

The reaction distance plus the braking distance, or points 1 and 2, together make up the stopping distance.

Therefore, in order to compute the necessary stopping distance, I must determine and add two partial values (reaction distance + brake distance). The reaction time is the amount of time it takes for a driver to spot a danger before braking.

Therefore, Velocity of moving vehicle=v  0, and decceleration =a and Final velocity of the vehicale =0.

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Jupiter's volume is more than ten times as large as Saturn's volume. This statement is true. Jupiter is the largest planet in our solar system with a volume of about 1,431,281,810,739 km³ while Saturn is the second-largest planet with a volume of about 827,129,915,150 km³.

Jupiter is approximately 11 times larger than Saturn. The two planets belong to the gas giant category, and they share many similarities such as having a large number of moons. Jupiter is famous for its Great Red Spot and powerful magnetic field, while Saturn is well-known for its stunning ring system. Both planets have been the focus of scientific research and exploration, and they continue to fascinate scientists and stargazers alike. In conclusion, Jupiter's volume is more than ten times as large as Saturn's volume.

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In heather's physics class, she had to solve the equation 7=12at2+ut for u. The correct answer is B.

A formula known as an equation uses the equals sign to express how two expressions are equal. Finding the values of the variables that result in the equality is the first step in solving an equation with variables.

The unknown variables are also known as the variables for which the equation must be solved, and the unknown variable values that fulfill the equality are known as the equation's solutions.

The equation 7 = 1/2 at² + ut can be solved as follows:

7 = 1/2 at² + ut

First we can subtract 1/2 at² from each side

7 -1/2 at² =  1/2 at² + ut - 1/2 at²

7 -1/2 at² = ut

Then we must divide by t

(7 -1/2 at²)/t = ut/t

Then we can solve it

(7 -1/2 at²)/t = u

Your question is incomplete the missing option attached below

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Answer:405

Explanation:Multiply 45x9.0=405

Answer:

405 Hz

Explanation:

Give the person on top Brainly

Answer

as it is given that 1hp=746W

100W=?hp

746hp=100W   (to find the value of hp we divide 100 on both sides)

746/100=hp

hp=7.46

Answer: 120 volts

Explanation:

If you have charges that were made against you but were dropped by the person who made them but are still on record, you can still take steps to address the situation. It is important to note that having charges on your record can have negative effects on your life, such as hindering your ability to secure employment and housing.

To address this situation, you may need to seek legal advice or the assistance of a criminal defense attorney. They will be able to guide you through the process of getting the charges removed from your record, or having them expunged. This will involve filing a petition to the court, providing evidence that the charges were dropped, and demonstrating that you meet the eligibility criteria for expungement or record sealing

. The process may vary depending on your location and the type of charges you faced, so it is important to seek guidance from a legal professional.To summarize, if you have charges that were made against you but were dropped by the person who made them but are still on record, you can seek legal advice or the assistance of a criminal defense attorney to have the charges removed from your record through a petition to the court.

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Answer:

the two gliders collide, the mobile glider will transfer a bit of time to the fixed glider, which is why it comes out with a speed that is smaller than that of the bullet glider.

Explanation:

When the two gliders collide, the mobile glider will transfer a bit of time to the fixed glider, which is why it comes out with a speed that is smaller than that of the bullet glider.

Changes can occur that the gliders unite and move with a cosecant speed less than the initial one.

The whole process must be analyzed using conservation of the moment.

             p₀ = m v₀

celestines que clash case

             p_f = (m + M) v

             po = pf

             m v₀ = (n + M) v

             v = \(\frac{m}{m+M}\)

calculemos

            v= \(\frac{0.200}{0.200+M} 0.450\)

            v= 0.09 m/s

elastic shock case

           p₀ = m v₀

           p_f = m v₁ +M v₂

           p₀ = p_f

           m v₀ = m v₁ + m v₂

The electric field between two parallel plates that are 5.8 mm apart and 220 v apart is 38034.48 N/C strong.

The electric field between two parallel plates can be calculated using the formula:

E = V / d

Where d is the distance between the plates, V is the potential difference, and E is the electric field.

In this case, the potential difference is 220 V, and the distance between the plates is 5.8 mm = 0.0058 m.

Therefore, the electric field is:

= E

= 220 V / 0.0058 m

= 38034.48 N/C

It's important to note that this is the electric field between the two parallel plates, the potential difference is only applicable between these two plates and it's not the general electric field of the space.

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To find the number of regular (statute) miles in 1 nautical mile, we need to determine the length of the arc on the surface of the earth that corresponds to 1 nautical mile.

We are given that the central angle formed at the center of the earth has a measure of 1'. We know that the circumference of a circle is given by 2πr, where r is the radius of the circle. In this case, the radius of the earth is given as 4,000 miles.To find the length of the arc corresponding to 1', we can use the formula for the circumference of a circle and convert the angle measure from minutes to radians:C = 2πr
Arc Length = C * (θ/360) (where θ is the angle measure in degrees)In this case, the angle measure is given as 1', which is equal to 1/60 degrees or (1/60) * (π/180) radians.
Arc Length = 2π * 4,000 miles * [(1/60) * (π/180)]
Simplifying the expression:Arc Length = (2 * π * 4,000 * 1 * π) / (60 * 180) miles
Arc Length = (8 * π² * 4,000) / (60 * 180) miles
Arc Length ≈ 110.6 miles
Therefore, the length of the arc on the surface of the earth that corresponds to 1 nautical mile is approximately 110.6 miles.To find the number of regular (statute) miles in 1 nautical mile, we can divide 1 nautical mile by the length of the arc:Number of regular miles in 1 nautical mile = 1 nautical mile / 110.6 miles
Number of regular miles in 1 nautical mile ≈ 0.00904 miles
Rounded to the nearest hundredth of a mile, the number of regular miles in 1 nautical mile is approximately 0.01 miles.

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