A person is pushing their baby in a stroller at a constant speed. Which of the following statements are true? Choose all that are correct.
-the force of the person on the stroller must be greater than the force of the stroller on the person, otherwise they wouldn't move
-the force of the person on the stroller must be equal to the force of the stroller on the person because they're moving at a constant speed
-the force of the person on the stroller must be equal to the force of the stroller on the person because of Newton's 3rd Law
-the net force on the stroller must be 0 because it's moving at a constant speed
-the net force on the stroller must be 0 because of Newton's 3rd Law
-the net force on the stroller must not be zero, otherwise it wouldn't move

Answer:HJKGFHJYKIUGFJDTGYKUGFJDSX

Explanation:65TTY6Y Y YY. ;D DDS

HVC BJCHGNMGHJFYIKUHYGFTR6457TY8IUOHJKGYTDYR567YUOI8HJKBGJMVHDTR5E46T7Y TFGDGHYUFVYH T7UYGHUGFTY Y6TURF67URY

Answer: 220 °C = 428 °F

Explanation:

220 degrees Celsius is approximately equal to 428 degrees Fahrenheit.

Celsius (°C) and Fahrenheit (°F) are two different temperature scales used to measure temperature. The Celsius scale is widely used in most countries around the world, while the Fahrenheit scale is primarily used in the United States and a few other countries.

To convert Celsius to Fahrenheit, the following formula is used :

°F = (°C × 9/5) + 32

Let's apply this formula to convert 220 degrees Celsius to Fahrenheit:

°F = (220 × 9/5) + 32

°F = (220 × 1.8) + 32

°F = 396 + 32

°F = 428

Therefore, 220 degrees Celsius is approximately equal to 428 degrees Fahrenheit.

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The same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

Let us understand what these terms mean:

In statistical analysis, multicollinearity is the high correlation among predictors in a regression model. It is problematic because of its adverse effects on the model, including making it difficult to determine the effect of an independent variable, coefficients becoming insensitive to small changes in the model, and reducing the reliability of the model.

In regression analysis, independent predictors are those variables that contribute to the prediction of the dependent variable or outcome, and their inclusion in the model improves the accuracy of the prediction of the model.

In a regression model, it is an assumption that predictors are independent, which means that the predictors have little to no correlation with each other. If this assumption is violated, it is known as multicollinearity.

Therefore, the same thing could reasonably be said about multicollinearity. Specifically, the reason for this is due to the violation of the assumption of independent predictors.

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If a dung beetle can roll (without slipping) a ball of dung whose radius is 2.5 cm at a linear speed if 3.5 m/s, the angle through which the ball rolls as the ball moves a distance of 15 cm is approximately 343.8 degrees.

Assuming that the ball of dung rolls without slipping, the distance traveled by any point on the circumference of the ball is given by the circumference of the circle it traces. The circumference of the ball can be calculated as follows:

C = 2πr

C = 2π(2.5 cm)

C = 15.7 cm

The distance traveled by the ball is given as 15 cm. Therefore, the number of revolutions made by the ball can be calculated as follows:

Number of revolutions = Distance traveled by ball / Circumference of ball Number of revolutions

Number of revolutions = 15 cm / 15.7 cm

Number of revolutions = 0.955

Since the ball completes less than one full revolution, the angle through which it rolls can be calculated as follows:

Angle = Number of revolutions x 360 degrees

Angle = 0.955 x 360 degrees

Angle = 343.8 degrees (rounded to one decimal place)

Therefore, the ball of dung rolls through an angle of approximately 343.8 degrees as it moves a distance of 15 cm.

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The angular acceleration of the wheel is 3.0 rad/s^2.

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

We can use the following formula to find the angular acceleration:

angular acceleration (α) = (final angular velocity - initial angular velocity) / time

where time is the time interval over which the change in angular velocity occurs.

Using the given values, we have:

α = (-12 rad/s - (-36 rad/s)) / 8.0 s

α = 24 rad/s / 8.0 s

α = 3.0 rad/s^2

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The cart A experienced the greatest impulse.

The given parameters;

Impulse is defined as the product of the applied force  and time of action of the applied force.

J = Ft

where;

J is the impulse

F is the applied force

t is the time of action

The impulse experienced by cart A;

J = 2 x 2 = 4 Ns

The impulse experienced by cart B;

J = 1 x 3 = 3 Ns

Thus, the cart A experienced the greatest impulse.

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The friction from the seat and the force from the door making contact with the passenger are the sole factors at work.

There will be severe injuries to the passenger.

Death might happen with a collision with the windshield at 50 km/h.

In automotive collisions, the impact force of a vehicle is determined by multiplying its mass by its acceleration, which includes speed.

Or to put it another way, the force of an impact is all the force that is applied to an item during a contact.

Body weight times vehicle speed is the formula for calculating crash force.

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-245.69 J of work per cycle must be supplied to remove 910.0 J of heat from the cold reservoir, assuming the given temperature values.

The negative sign indicates that work is being supplied to the system.

To determine the work per cycle required to remove 910.0 J of heat from the cold reservoir, we need the temperatures of the cold and hot reservoirs. Since you haven't provided those values, we can make assumptions for the calculations.

Let's assume the cold reservoir temperature (Tc) is 273 K (0°C) and the hot reservoir temperature (Th) is 373 K (100°C). Now we can proceed with the calculations.

First, convert the heat transfer value to energy by multiplying by -1 since heat is being removed:

Qc = -910.0 J

Next, use the Carnot refrigerator efficiency formula:

Efficiency = 1 - (Tc / Th)

Efficiency = 1 - (273 K / 373 K)

Efficiency = 1 - 0.731

Now we can calculate the work per cycle (W):

W = Efficiency * Qc

W = (1 - 0.731) * -910.0 J

W ≈ -245.69 J

Therefore, approximately -245.69 J of work per cycle must be supplied to remove 910.0 J of heat from the cold reservoir, assuming the given temperature values. The negative sign indicates that work is being supplied to the system.

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True. Interval estimates are preferred over point estimates since a confidence level can be specified.

An interval estimate provides a range of values within which the true population parameter is likely to fall, while a point estimate gives a single value as an estimate. The confidence level associated with an interval estimate reflects the degree of certainty that the interval contains the true population parameter. This additional information makes interval estimates more useful and informative than point estimates.

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Answer:

the answer from my side is both vertical and horizontal

Answer:

Entirely horizontal

Explanation:

The ball begins the movement with horizontal and vertical velocity, but it is subject to the gravity acceleration, that will break the movement. When it achieves the top of the path, is when the vertical velocity go to 0 and begin to grow in the opposite direction, so in the very top of the path, the velocity is entirely horizontal

Answer:

More than 60% of the total refractive power of the eye is attributed to the cornea making it vital to focusing light onto the retina for visual processing 115.

Explanation:

For optimal vision, the cornea must efficiently transmit incident light by maintaining its transparency.

Answer:

The three life-support systems she talks about are, not just our own body, but civilization and the earth. All these things help us to survive. In forensics, this could be applied to finishing a case. Forensic’s life-support relies on, our knowledge, evidence, and technology.

The potential difference across a cell wall can be calculated using the formula:

ΔV = Ed

where ΔV is the potential difference, E is the electric field strength, and d is the distance or thickness of the cell wall.

Plugging in the values given in the problem, we get:

ΔV = Ed = 360 × 10^-9 × 6.5 × 10^-3 = 2.34 × 10^-6 volts

Therefore, the potential difference across the cell wall is 2.34 microvolts (μV).

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Answer:

1.) F = 5.3×10^-3 N

2.) Positive y - direction

Explanation:

The parameters given are:

Charge q = 0.0005C

Velocity V = 2.5010 m/s

Magnetic field B = 4.2 T

Magnetic force F = BVqsinØ

F = BVq

since Ø = 90 degree

Substitute all the parameters into the formula

F = 4.2 × 2.5010 × 0.0005

Therefore, the magnetic force on a particle is F = 5.3 × 10^-3 N

2.) According to Fleming's left hand rule, the direction of the magnetic force will be perpendicular to the magnetic field which moving upward of the screen.

Answer:

it’s f=0.0005 x 2.5 x 10^5 x 4.20

F= 525 N

+ y direction (up)

Explanation:

got it right

An object has a mass of 10 kg and is pushed with a force of 2 N the object acceleration is  0.2m/s².

Given;

m = 10 kg

F = 2N

by using Newton's second law of motion that is the formula of force

F = ma

a =  F/m

a = 2/10

a = 0.2m/s²

An object is said to accelerate when its velocity changes. A change in the speed of an object can be an increase or decrease in speed or a change in  direction of motion. Some examples of acceleration are a falling  apple, the moon orbiting  the Earth, or  a car stopping at a traffic light. Using these examples, we can understand that when  a moving object changes direction or increases or decreases speed, acceleration occurs.

The  unit of acceleration is  meter per second per second (m/s2).

There are 2 types of acceleration

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Freefall is a special illustration of motion with constant acceleration since the acceleration brought on by gravity remains constant and downward. If an object is thrown or moves upward, its velocity is zero.

Definition. A body is referred to as being in freefall if it is only moving in relation to Earth's gravity. If there is an outside force acting on the ball, it will move more quickly. Gravitational acceleration is the name given to this rate of free fall.

We use the plus and minus marks to indicate direction, with up meaning positive or down denoting negative. The beginning velocity must be positive because the rock is launched upward up is positive. An is negative because of the gravitational acceleration, which is downward.

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Answer:

Salt crystals are hard and brittle because they are made up of atoms that combine by ionic bonding.

Explanation:

Answer:

Constant and positive constant

Explanation:

The object move with the same velocity at the same interval

Answer:

3.white light

The static friction force on box A and B can be calculated using the equation fs ≤ μs * N.

Where fs is the static friction force, μs is the coefficient of static friction, and N is the normal force acting on the object. For box A, the static friction force is fs = μs * N = 0.4 * (20 kg * 9.8 m/s^2) = 78.4 N. For box B, the static friction force is fs = μs * N = 0.5 * (10 kg * 9.8 m/s^2) = 49 N. Therefore, the static friction force on box A is larger than the friction force on box B (fA > fB). This is because the friction force is directly proportional to the weight of the object and the coefficient of static friction. Box A has a larger weight and a smaller coefficient of static friction than box B, which results in a larger static friction force acting on it to keep it at rest.

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Answer:

2 atomic of phosphorus and 5 of oxygen

Explanation:

The numbers attached to the elements (ie. subscript) show the amount of atoms present for each element.

Answer:

I think its the helicopter one

Explanation:

it could be the bus one though

The correct option is A. The source of information could be biased.

The scientist's conclusion is most likely unreliable because the sample used for the investigation is not representative or diverse enough to draw a generalized conclusion about the beliefs of the entire population.

Interviewing only 50 people who work in the local oil mine introduces a potential bias, as those individuals may have a vested interest in downplaying the impact of the mine on bird population decline.

Additionally, the sample size is relatively small, which reduces the statistical reliability of the conclusion.

To obtain a more accurate and reliable conclusion, a larger and more diverse sample should be used, including individuals from various backgrounds and perspectives, along with other data collection methods such as field surveys or scientific studies.

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Answer:

d

Explanation:

Answer:true

Explanation:

A molecule with 5 bonding domains and 2 lone pairs will have an electron-domain geometry of pentagonal bipyramidal and a molecular geometry of seesaw.

The electron-domain geometry of a molecule with 5 bonding domains and 2 lone pairs can be predicted using the Valence Shell Electron Pair Repulsion (VSEPR) theory. This theory states that electron pairs around a central atom arrange themselves to minimize repulsion, resulting in specific geometries based on the number of electron pairs.

In this case, there are a total of 7 electron pairs: 5 bonding domains and 2 lone pairs. This corresponds to an electron-domain geometry of pentagonal bipyramidal. However, molecular geometry is determined by considering only the bonding domains and ignoring the lone pairs.

To determine the molecular geometry, we must identify the positions of the lone pairs within the pentagonal bipyramidal structure. Lone pairs are typically located in equatorial positions, as these provide more space and minimize repulsion. With 2 lone pairs occupying 2 of the 5 equatorial positions, there will be 3 equatorial bonding domains left.

The molecular geometry, taking into account the 3 equatorial bonding domains and the 2 axial bonding domains, is called seesaw (or disphenoidal). This geometry is characterized by a central atom bonded to two axial atoms and three equatorial atoms, with the axial bonds in a linear arrangement and the equatorial atoms forming a trigonal planar configuration around the central atom.

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Answer: Temporary Suppression

Explanation: None.

The fact that we slow down when we see a police car and then speed up again is an example of reactive behavior.

It refers to the instinctive response drivers often have when they notice the presence of law enforcement vehicles or other potential sources of authority or enforcement. This reaction can lead to temporary changes in driving behavior, such as slowing down briefly and then returning to the previous speed once the perceived threat has passed.

It can also be attributed to several factors:

1. Fear of Punishment: The primary reason for this behavior is the fear of potential consequences. When drivers see a police car, they may worry about getting a ticket, facing fines, or having their driving record affected. This fear prompts them to quickly adjust their speed and adhere to traffic regulations to avoid potential punishment.

2. Compliance with Authority: Police cars represent authority figures enforcing traffic laws. As a result, many drivers instinctively respond by complying with the presence of law enforcement. Slowing down momentarily can be seen as a show of respect or adherence to their authority.

3. Perception of Surveillance: The presence of a police car can create a sense of being monitored or under scrutiny. Even if drivers are not consciously breaking any laws, the feeling of being observed can lead to a temporary adjustment in behavior as a subconscious response.

4. Habit and Social Norms: The behavior of slowing down when encountering a police car has become a common practice and a social norm in many societies. This behavior may be reinforced by observing others engaging in similar actions, creating a collective response to the presence of law enforcement vehicles.

It's worth noting that this behavior is not universally observed in all drivers, and individual reactions may vary based on personal experiences, cultural influences, and the prevailing traffic conditions. Additionally, it's important for drivers to prioritize safety and adhere to traffic laws consistently, rather than solely responding to the presence of law enforcement.

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Answer:

Explanation:

Remark

This is a second class lever. It is much more efficient than the fishing pole problem. All distances are measured from the pivot in these kinds of questions.

Givens

d1 = 1.5

d2 = ?

m1 = 50 kg

m2 = 30 kg

The lighter child will have to sit further away from the pivot to make the two conditions equal.

Formula

d1*m1 = d2*m2

1.5*50 = d2 * 30

75 = 30 * d2

75/30 = d2

d2 = 2.5

Remark

Notice that the distance is longer for the lighter child. The fact that these are masses and not forces does not matter, but you should take note of it. There is a difference between masses and forces. See the fishing pole problem.

Answer to the multiple Choice question. No motion on this kind of problem means equal moments. The answer is D

Problem 2

1) The wheels are further apart making B more stable. The wider the distance the wheels are apart, the harder it would be to tip the concrete mixer over

2) The center of gravity is lower. The higher the force is the more chance you have of exerting an external force to tip the mixer over.

Answer:

\(\huge\boxed{\sf v = 0.75\ m / s}\)

Explanation:

Given Data:

Wavelength = λ = 0.25 m

Frequency = f = 3 Hz

Required:

Speed = v = ?

Formula:

v = fλ

Solution:

v = (3)(0.25)

v = 0.75 m / sec

\(\rule[225]{225}{2}\)

Hope this helped!