you are driving your car around a roundabout when you get a flat tire and you decelerate at a constant rate to a stop. the diameter of the roundabout is 40 m . it takes you 31 s to come to a complete stop. while slowing down, you continue to drive in a circle and you stop at the same spot that you popped your tire. what must have been your speed before the pop?

Answer:

d = 8.45 m

Explanation:

Given that,

A basketball is dropped from top of the rim.

It takes 1.3s to fall.

We need to find the displacement of the basketball. Let the displacement is d. Using second equation of kinematics,

\(d=ut+\dfrac{1}{2}at^2\)

Where

u is the initial velocity, u = 0

a = g

So,

\(d=\dfrac{1}{2}\times 10\times 1.3^2\\\\d=8.45\ m\)

So, the displacement of the basketball is 8.45 m.

(a) The moment of inertia of the wheel is 22.8 kg·m².

(b) The magnitude of the frictional torque is 3.67 N·m.

(c) The total number of revolutions of the wheel during the entire interval of 67.1 s is approximately 4.83 revolutions.

(a) To find the moment of inertia of the wheel, we can use the formula for torque:

Torque = Moment of inertia * Angular acceleration

The total torque is 36.1 N·m and the angular acceleration is the change in angular speed divided by the time, we have:

36.1 N·m = Moment of inertia * (9.8 rad/s - 0 rad/s) / 6.20 s

Simplifying the equation:

Moment of inertia = (36.1 N·m * 6.20 s) / 9.8 rad/s

Moment of inertia = 22.8 kg·m²

Therefore, the moment of inertia of the wheel is 22.8 kg·m².

(b) After the applied force is removed, the wheel comes to rest, indicating that the torque due to friction is acting in the opposite direction to oppose the wheel's motion. We need to find the magnitude of this frictional torque.

The frictional torque can be found using the equation:

Torque = Moment of inertia * Angular acceleration

Since the wheel comes to rest, its final angular speed is 0 rad/s, and the time taken for it to come to rest is 60.9 s. Therefore, the angular acceleration can be calculated as:

Angular acceleration = (0 rad/s - 9.8 rad/s) / 60.9 s

Plugging in the values:

Angular acceleration = -0.161 rad/s²

Now we can find the frictional torque:

Torque = 22.8 kg·m² * (-0.161 rad/s²)

The magnitude of the frictional torque is 3.67 N·m.

(c) The total number of revolutions can be calculated by finding the total angle rotated by the wheel in radians and converting it to revolutions.

During the first 6.20 s, the wheel rotates from 0 rad/s to 9.8 rad/s. The total angle rotated can be found using the equation:

θ = 0.5 * (initial angular speed + final angular speed) * time

θ = 0.5 * (0 rad/s + 9.8 rad/s) * 6.20 s

θ = 30.38 rad

During the next 60.9 s, the wheel comes to rest, so the total angle rotated is 0 rad.

Therefore, the total angle rotated by the wheel in 67.1 s is 30.38 rad.

To convert this to revolutions, we divide by 2π radians, since there are 2π radians in one revolution:

Number of revolutions = 30.38 rad / (2π rad/rev)

Number of revolutions ≈ 4.83 revolutions

Therefore, the total number of revolutions of the wheel during the entire interval of 67.1 s is approximately 4.83 revolutions.

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Answer:

i don't really know but i think yes sorry if it is wrong

The average change in momentum for the car during the trip is 8400 kg·m/s.

What is Momentum?

Momentum is a vector quantity, meaning it has both magnitude and direction. The direction of momentum is the same as the direction of velocity, and its magnitude is proportional to both the mass and the velocity of the object.

Then, we calculate the final momentum of the car during the remaining 3 hours:

Final momentum during the remaining 3 hours = mass × final velocity during the remaining 3 hours = m × v2

Now, we can calculate the average change in momentum:

Average change in momentum = Final momentum - Initial momentum

= (Final momentum during the first 2 hours + Final momentum during the remaining 3 hours) - Initial momentum

= [(m × v2) + (m × v2)] - (m × v1)

= 2m × v2 - m × v1

Plugging in the given values:

Mass of the car (m) = 1400 kg

Initial velocity (v1) = 32 m/s

Final velocity during the first 2 hours (v2) = 38 m/s

Average change in momentum = 2m × v2 - m × v1

= 2 × 1400 kg × 38 m/s - 1400 kg × 32 m/s

= 53200 kg·m/s - 44800 kg·m/s

= 8400 kg·m/s

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Answer:

he drinks in the glasses:

✔ liquid

The air the people are breathing:

✔ gas

The table:

✔ solid

The salad dressing:

✔ liquid

The lettuce in the bowl:

✔ solid

Explanation:

got it right on edge2022

Answer:

Liquid,Gas,Solid,Liquid,Solid.

Explanation:

tempreture

√12 is  degrees Celsius per meter.

What is tempreture?

tempreture is the degree of hotness or coldness of any kind of objects.

Sol-

The highest rate of tempreture increase is given as 6degrees as per the question

Imagine this high rate as a diagonal vector pointing in the northeast direction.

This vector has an x component (horizontal, or east) and a y component (vertical, or north).

The highest rate (maximum) is found as the magnitude of these two components.

It is the square root of (x^2)+(y^2).

6= √((x^2)+(y^2))

-> Take the square of both sides to remove the square root on the right side of the equation.

36 = (x^2)+(y^2)

-->The x^2 and y^2 values each must equal 8 in order to get:  12

(x^2) = 12

x = √12

(y^2) = 12

y = √12

If the object moves directly north, it is therefore moving only in the y-direction.

Thus, it is increasing tempreture at a rate of √12 degrees Celsius per meter.

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Answer: the cube will proble sink

but the pink will float

While a better Operating Ratio generally indicates higher efficiency and profitability, there are circumstances where focusing on other strategic initiatives, such as infrastructure investments or pricing strategies, can result in increased revenue and ultimately lead to higher profits, even with a temporarily worse Operating Ratio.

While it may seem counterintuitive, it is indeed possible to make more money with a worse Operating Ratio in certain situations. The Operating Ratio is a financial metric used in the railroad industry to measure the efficiency of operations, calculated by dividing operating expenses by operating revenue and expressing it as a percentage. A lower Operating Ratio indicates better cost control and higher profitability.

However, there are scenarios where focusing solely on achieving a better Operating Ratio may not necessarily maximize profits. For instance, a railroad company might strategically invest in infrastructure upgrades or equipment purchases that temporarily increase operating expenses but lead to long-term revenue growth. These investments can be essential for expanding capacity, improving service quality, and attracting more customers, ultimately generating higher overall revenue despite a temporary increase in operating expenses.

Additionally, a railroad may adopt pricing strategies to maximize revenue, even if it negatively impacts the Operating Ratio. This could involve offering discounted rates or incentives to secure long-term contracts with high-volume customers, resulting in lower operating revenue per unit but ensuring a steady and predictable stream of business.

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To double the rate at which energy is transported by a transverse wave traveling along a string, you should increase the amplitude of the wave by a factor of the square root of 2 (√2).

we'll consider the relationship between the energy transported by a transverse wave traveling along a string and its amplitude. The power (rate of energy transport) of a wave is proportional to the square of its amplitude. Given that you want to double the rate (r) at which the energy is transported, you can use the following steps:
1. Set up the proportionality equation: New Power (2r) = k * (New Amplitude)^{2} where k is the proportionality constant.
2. Since the power is doubled (2r), we can rewrite the equation as: 2r = k * (New Amplitude)^2.
3. Divide both sides by k and r to find the ratio of the new amplitude squared to the original amplitude squared: \frac{(New Amplitude)^{2 }{ (Original Amplitude)^{2}} = 2.
4. To find the factor by which the amplitude should be increased, take the square root of both sides:\frac{ New Amplitude }{Original Amplitude }= √2.

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complete question:

a transverse wave traveling along a string transports energy at a rate r. if we want to double this rate, we could group of answer choices

A. increase the amplitude by a factor of square root of (8)

B. increase the amplitude of the wave by a factor of 8

C .increase the amplitude by a factor of square root of (2).

D. increase the amplitude of the wave by a factor of 2.

E. increase the amplitude of the wave by a factor of 4.

The best way to find the exact distance to the moon is by using the Lunar Laser Ranging (LLR) technique.The Lunar Laser Ranging (LLR) technique is currently the most accurate method for determining the distance between the Earth and the Moon.

This technique involves firing a laser beam from a ground-based observatory at a retroreflector array placed on the Moon by astronauts during the Apollo missions. The laser beam is reflected back to Earth, and the time it takes for the light to travel to the Moon and back is measured with extremely high precision.

By measuring the round-trip time of the laser beam and taking into account the speed of light, scientists can calculate the distance between the Earth and the Moon with an accuracy of a few millimeters. This technique has been used for over 50 years and has provided invaluable data for studying the dynamics of the Earth-Moon system, including the moon's orbit and rotation, and the tides on Earth. The LLR technique has also helped to test the theory of gravity, and has provided constraints on the masses of the Earth, Moon, and other objects in the solar system.

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Answer:

remains the same

Explanation:

Momentum refers to the quantity of motion of a body. When any body of mass moves, it possess momentum. Numerically,

Momentum =  mass x velocity

i.e. momentum is the product of the mass x velocity

Momentum of a body is always conserved.

In the context, the skateboard has certain momentum before Freddy lands on it. After Freddy lands, the momentum of skateboard remains the same, there is no change in the momentum.

This is because, here the momentum is conserved. After Freddy lands on the skateboard, the total mass on the skateboard increases and so the velocity decreases making the momentum same before the landing.

Answer:

International Environmental Problems require international Cooperation to resolve them Factors Responsible for the Emergence of the Environment as a Global Issue 1. The Multiplication and Deepening of Environmental Problems.

thanks!

Mark me brainliest!

Answer:

259200

Explanation:

use the formula distance= speed x time

change the 2 hours to seconds (7200) and multiply that number by 36 and it'll give you 259200

Answer:

12 kilometers and hour

Explanation:

I have an image solution for this, don't worry.

Even if the submarine's mass rises while its volume stays constant, the buoyant force on it doesn't change. As a result, the buoyant force on the submarine has changed by around 9,434.53 N.

The air in the ballast tanks is evacuated out of the submarine as it dives, and the ballast tanks are flooded with water until the submarine's overall density is greater than the surrounding water, at which point the submarine starts to sink. (negative buoyancy).

Identify the buoyant force change:

The weight of the displaced water changes in proportion to the change in buoyant force. As a result, the buoyant force has changed as follows:

change in buoyant force = change in weight of displaced water

change in buoyant force = 9,434.53 N

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Answer:

Velocity is the rate of change of displacement. Acceleration is the rate of change of velocity. Velocity is a vector quantity because it consists of both magnitude and direction. Acceleration is also a vector quantity as it is just the rate of change of velocity.

Answer:

3.77202

Explanation:81.9 kg×9.8N/kg÷0.0021 Pa ×(1atm/101325)=3.77202

The pressure exerted between her toes and the ground is 3.77 atm.

The stress at a location within a confined fluid or the perpendicular force per unit area are the two definitions of pressure used in the physical sciences. A 42-pound box with an area of 84 square inches at the bottom will apply pressure on a surface equal to the force divided by the surface area.

Given:

An 81.9 kg person stands on her toes. The surface area of her toes in contact with the ground is only 0.00210 m²,

Calculate the pressure on the toe as shown below,

The pressure on the toe = Force of man / area of toe

The pressure on the toe = mass of man × 9.8 / 0.00210

The pressure on the toe = 81.9 × 9.8 / 0.00210

The pressure on the toe = 802.62 / 0.00210

The pressure on the toe = 382200 N/m²

The pressure on the toe = 382200 / 101325 (1 atm = 101325 N / m²)

The pressure on the toe = 3.77 atm,

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The Momentum is the product of the mass of a particle and its velocity. Momentum is a vector quantity it has both magnitude and direction.

Momentum is defined as equal to the mass of an object multiplied by the velocity of an object. The two bowling balls can have the same momentum if the bowling ball with less mass has a higher velocity, and the bowling ball with greater mass has a lower velocity. The momentum can be easily transfer from one body to another body.

So we can conclude that: The Momentum is the product of the mass of a particle and its velocity. Momentum is a vector quantity it has both magnitude and direction.

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Answer:

m = 60 [kg] (mass on the moon)

Explanation:

We must remember that the mass is conserved, that is, it remains the same regardless of where it is located.

The only variation is the weight, which is different from the mass. Weight is determined by means of the product of mass by gravitational acceleration.

Therefore the mass of 60 [kg] on Earth will be the same mass on the moon.

The more distant planet experiences one-sixteenth as much gravitational force from the star as the closer planet.

According to Newton's law of universal gravitation, the gravitational force between two objects is inversely proportional to the square of the distance between them. In this scenario, since the more distant planet is four times as far from the star as the closer planet, the distance between the more distant planet and the star is twice the distance between the closer planet and the star.

Using the inverse square relationship, we can calculate the ratio of gravitational forces:

(1/distance^2) : (1/(2 * distance)^2) = 1 : (1/4) = 4 : 1

Therefore, the more distant planet experiences one-sixteenth as much gravitational force from the star as the closer planet.

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Answer:

The range and severity of symptoms can vary widely. Common symptoms include difficulty with communication, difficulty with social interactions, obsessive interests, and repetitive behaviors.

At any age

1. Loss of previously acquired speech, babbling or social skills.

2. Avoidance of eye contact.

3. Persistent preference for solitude.

4. Difficulty understanding other people's feelings.

5. Delayed language development.

6. Persistent repetition of words or phrases (echolalia)

7. Resistance to minor changes in routine or surroundings.

Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."

Explanation:

antinodes vibrate and are the opposite of nodes which are stationary.

Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.

The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.

The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.

During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.

The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."

Hence some parts of the pizza are hot while others are still cold.

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Answer: Most aerobic and strength training programs cause your muscles to contract and tighten. So stretching after you exercise helps optimize the range of motion about your joints and boosts circulation.

Hope this helps!

Answer:

We do. It's just way too small compared to the force between the objects we're observing and the earth. It's like looking inside a room with an elephant and a grain of rice. The rice is there, it's just too small compared to the room and the elephant inside for you to notice it. Or, if you ever traveled on a plane, you can easily see the towns, or the roads, but not the single people walking the street.

The efficiency of the kettle is 117.9%

Efficiency is used to measuring how much work or energy we can conserve in a process. In other words, it is like comparing the output of the energy to the input of the energy in any given system.

It is also define as the ratio of  Energy Input to the Energy Output. To express it in percent multiply it by 100.

Here, Efficiency = Energy output / Energy input

          \(η =\frac{W_{out} }{W_{in} } * 100\)

\(η = \frac{198kJ}{168kJ} * 100\)  

=  117.9%

So , the efficiency is 117.9%

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In a controlled experiment, control group is compared to an experimental group.

The correct option is A.

In experiments, independent variables are changed to see how they effect dependent variables. In a controlled experiment, every factor besides the independent variable is kept under control or constant to ensure that it has no impact on the dependent variable.

To reduce potential confounding factors in controlled experiments, researchers randomly assign participants to either the experimental group or the control group. The experimental group is the group that receives the variable, or treatment, that the researchers are testing, whereas the control group does not.

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In basin and range topography, the lowest areas are frequently occupied by a(n)  basin.

Basin and range topography is a geological feature characterized by alternating mountain ranges and elongated valleys or basins. The formation of this topography is attributed to the stretching and faulting of the Earth's crust, which leads to the uplift of mountains and the subsidence of adjacent basins.

The lowest areas in this type of topography are often occupied by basins, which are elongated depressions or low-lying regions. These basins typically collect sediment and water, forming flat or gently sloping landscapes. They can range in size from small valleys to extensive lowland areas.

The basins are important features of the basin and range topography and contribute to the unique landscape and hydrological characteristics of the region.

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