Checkpoint 4 1. Refer to Figure 1.25. Cart B, of mass 350 g, moves on the frictionless linear air track at 2 m. s-' to the left. Cart B strikes cart A, of mass 200 g, travelling in the opposite direction at 1,2 m. st. After the collision, cart B continues in its original direction at 0,7 m. s', a)Why is this considered an isolated system of colliding bodies? b) Calculate the velocity of cart A after the collision. c) How does the change in momentum of each cart compare? Check your answer using calculations. Cart B Cart A 2 m. s1 1.2 m. s 1 S" 200 g 350 g​

Answer:

The figure shows different possible transitions of electrons as they move from higher energy states to lower energy states. Which transition will produce the spectrum line with the lowest wavelength in this element’s atomic spectrum?.

Explanation:

A variable that is kept constant during an experiment is called a "controlled variable" or a "constant."

In an experiment, researchers manipulate one variable, known as the independent variable, to see how it affects another variable, known as the dependent variable. However, to ensure that any changes observed in the dependent variable are due to the manipulation of the independent variable and not other factors, researchers keep other variables constant or controlled.

These variables are referred to as controlled variables or constants. By controlling these variables, researchers can more accurately isolate the effect of the independent variable on the dependent variable and draw meaningful conclusions from the experiment.

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--The complete question is, What do you call a variable that is kept constant during the experiment.--

A scenario that includes at least 5 vector values are: You drive 2 blocks East, 3 blocks North, 4 blocks West.

Vector is a mathematical object that can be used to represent physical quantities such as velocity, force and acceleration. A vector has both a magnitude, or size, and a direction. It is represented by an arrow, with the length of the arrow denoting the magnitude and the direction of the arrow denoting the direction.They can be used to represent physical phenomena such as forces, velocities, and accelerations.

                The displacement vector = (2,3,-4)

The magnitude of the displacement vector is the square root of the sum of the squares of the individual components:

displacement vector| = √(2² + 3² + (-4)²)

                                    = √(4 + 9 + 16)

                                  = √(29)

                                 = 5.385

The angle of the displacement vector can be found using the arctangent function (inverse tangent):

                         angle = arctan(3/-4)

                         = -1.030 radians

                           = -59.04 degrees

Therefore, the total displacement is 5.385 blocks at an angle of -59.04°.

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Answer:

Derived units are derived from these 7 base units. Derived units are dependent on the base units and are not independent of each other. ... Mass has SI units of kg, distance is measured in m and t has the SI unit of second. Thus, SI unit of force is kg.

Answer:

A proposed answer to a s scientific problem is a hypothesis.

The weight of a \(45 kg\) box is \(441.45 N\).

Weight refers to the measure of the force exerted on an object due to the gravitational pull of the Earth.

Given the mass of the box is \(m=45 kg\).

The weight of an object (\(W\)) can be found by multiplying the mass of the object (\(m\)) by the acceleration due to gravity (\(g\)).

So, \(W=mg\).

It is known that acceleration due to gravity, \(g=9.81 m/s^2\).

Hence, the weight of the box, \(W=(45kg)\times (9.81 m/s^2)\).

\(\Rightarrow W=441.45 (kg\cdot m/s^2)\\\Rightarrow W=441.45 N\)

Therefore, the weight of the box is \(441.45 N\).

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Easiest way to accomplish ride on the slide down the hill is by putting feet first. Sledding down the hill with head makes it harder to steer and makes skull vulnerable to impacts if you fall off . That is why, sled down the hill feet first to stay safe.

Newton's First Law, the Law of Inertia states that object at rest will be at rest until and unless acted upon by an external force. When one sits down on the sled, you and the sled are objects at rest. To start sledding down the hill, an external force must be applied.

A sled and its rider move at a speed along a horizontal stretch of snow and it exerts a kinetic frictional force on the runners of the sled. Therefore the sled slows down and eventually comes to a stop.

Sleds don't technically touch the snow because of friction and instead ride on a small layer of water formed by the heat of the sled sliding down the hill.

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The distance of the trip that Kayak travelled at an average speed of 18 mph in 5 hour is 90 miles

First, we shall obtain the eqaution to determine the distance. This can be obtained as follow:

Speed is defined as:

Speed = distance / time

Cross multiply

Distance = speed × time

With the above formula, we can obtain the distance. Details below

The following data were obtained from the question:

Distance = speed × time

Distance = 18 × 5

Distance = 90 miles

From the above calculation, we conclude that the distance traveled is 90 miles

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The acceleration of the object is approximately 2.38 m/s². To find the acceleration of the object, we can use the formula:

acceleration = change in velocity / time

The object goes from rest to a speed of 10 m/s in 4.2 seconds, the change in velocity is:

change in velocity = final velocity - initial velocity

change in velocity = 10 m/s - 0 m/s

change in velocity = 10 m/s

Plugging the values into the formula, we have:

acceleration = change in velocity / time

acceleration = 10 m/s / 4.2 s

acceleration ≈ 2.38 m/s²

Therefore, the acceleration of the object is approximately 2.38 m/s².

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Accountants consider only explicit costs when measuring profit and ignore implicit costs because explicit costs are easier to quantify and directly affect the financial statements of a business.

Accountants focus on explicit costs when measuring profit because these costs are tangible and can be easily identified and measured in monetary terms. Explicit costs refer to the actual out-of-pocket expenses incurred by a business, such as wages, rent, utilities, raw materials, and taxes. These costs are recorded and reported in the financial statements, allowing accountants to calculate the net profit or loss of a business.

On the other hand, implicit costs are opportunity costs that represent the value of resources used in an alternative way or foregone opportunities. They are not reflected in the financial statements as they do not involve actual cash outflows. Examples of implicit costs include the opportunity cost of the owner's time, foregone interest on invested capital, or the potential income from an alternative use of resources.

Economists, unlike accountants, consider both explicit and implicit costs when analyzing profitability. Implicit costs are important in economic analysis because they capture the full cost of utilizing resources, including the foregone opportunities associated with alternative uses.

However, accountants typically focus on financial reporting and measuring profit based on the explicit costs incurred. Implicit costs are more challenging to quantify and assign a monetary value to, making them less suitable for inclusion in traditional accounting practices.

Accountants focus on explicit costs and ignore implicit costs when measuring profit because explicit costs are easier to quantify, directly affect financial statements, and align with traditional accounting practices. Implicit costs, although relevant in economic analysis, are more difficult to measure and assign a monetary value to. By focusing on explicit costs, accountants provide a more straightforward and standardized approach to measuring profitability in financial reporting.

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Answer:

400 kN

Explanation:

El principio de Arquímedes establece que, cuando un cuerpo está total o parcialmente sumergido en un fluido, experimenta un empuje hacia arriba que es igual al peso del fluido desplazado.

Dado que;

Volumen del bloque = 80m ^ 3

Densidad del agua = 1000 kg / m ^ 3

Empuje hacia arriba = 1/2 * 80 * 1000 * 10

Empuje hacia arriba = 400 kN

Answer:

a semi truck

Explanation:

The number of joules per coulomb for 120-volt circuit is 120 joules/C.

The amount of energy transferred to each unit of charge is given by the voltage or potential difference between two points.

The unit of potential difference is the volt, which is equivalent to one joule per coulomb.

So if we have a 120-volt circuit, each coulomb of charge that flows between two points receives 120 joules of energy.

Energy per unit charge = Potential difference

= 120 volts

= 120 joules/coulomb

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The impulse that Earth exerts on a 210 g apple that is falling from a tree during the first 0.50 seconds can be calculated using the formula for impulse.

Impulse is defined as the change in momentum of an object, and is given by the equation:

J = Δp

where,

J is the impulse.

Δp is the change in momentum.

To calculate the impulse that Earth exerts on the apple, we need to know the initial momentum and the final momentum of the apple during the first 0.50 seconds.

Since the apple is falling freely, its initial momentum is zero (because it is at rest), and its final momentum can be calculated using the formula:

p = mv

where,

p is the momentum.

m is the mass.

v is the velocity.

Since the apple is falling freely, we can use the equation for free fall to find the velocity:

v = gt

where g is the acceleration due to gravity, and t is the time.

At the end of 0.50 seconds, the velocity of the apple can be calculated as: v = gt = (9.8 m/s²)(0.50 s) = 4.9 m/s.

Therefore, the final momentum of the apple can be calculated as:

p = mv = (0.210 kg)(4.9 m/s) = 1.029 kg m/s.

The change in momentum (Δp) during the first 0.50 seconds is simply the final momentum, since the initial momentum is zero.

Therefore, the impulse that Earth exerts on the apple during the first 0.50 seconds is given by:J = Δp = 1.029 kg m/s

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The combined tension of the two ropes on the swing is 4.34 N.

The force communicated through a rope, string, or wire when two opposing forces draw on it is known as tension. The tension force pulls energy equally on the bodies at the ends and is applied along the entire length of the wire.

Every physical object in contact with another one applies some force to that object.

Given that: angle with the vertical is = 13°.

Tension in each rope = 2.28N.

Hence, the resultant tension is = 2 × 2.28 N × cos18°

= 4.34 N.

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Answer:

\((300 - 100) \div 100 \)

Answer:

Explanation:

Density = mass / volume

density = 2.4

volume = 100 cm^3

2.4 = m / 100     Multiply both sides by 100

2.4 * 100 = m

m = 240 grams

If the question is asking for acceleration,

To find acceleration, we have to find the change in velocity over the change in time

In this case, the change of velocity is -30 km/hr and the change in time is 5 seconds

We must convert the units of sec to hours to solve this question

5 sec * 1 min/60 seconds * 1 hour/60 min = .00138889 hours

acceleration = change in velocity / change in time = -30 km/hr / .00138889 hours = -21599.999 km/hr^2 = ~-21600 km/hr^2

In order to analyze the experiment, we need to locate the data and observations in the lab guide, identify key results, and summarize the data to effectively convey our findings.

To locate the data and observations collected in your lab guide and summarize the key results, you can follow these steps:

1. Refer to your lab guide: Review the sections or instructions in your lab guide where you recorded the data and observations during the experiment.

2. Identify the key results: Look for the specific data points or measurements that are relevant to your experiment and research question. These could include numerical values, measurements, observations, or any other recorded information.

3. Organize the data: Arrange the data in a logical manner, such as in tables, graphs, or bullet points, depending on the format provided in your lab guide or the most appropriate way to present the information. Ensure that the data is clearly labeled and properly formatted for easy understanding.

4. Summarize the findings: Analyze the data and observations to identify the main patterns, trends, or conclusions that can be drawn from them. Consider any significant relationships, differences, or notable observations that are relevant to your research question or objective.

5. Present a summary: Write a concise summary that captures the key findings and observations from the data. Use clear and precise language to convey the main results and their implications. It is important to relate your findings back to your research question or objective to provide context and significance.

6. Use appropriate visuals: If applicable, include any tables, graphs, or charts that visually represent the data and support your summary. Visual aids can enhance the understanding and clarity of your findings.

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There seems to be one location where the Fahrenheit or Celsius scales meet. At both -40 °C und -40 °F, they are equal.

Because it is used in conjunction with the metric scale, the Fahrenheit scale is more frequently utilized. It makes reasonable that they utilize the Celsius scale as well since the majority of nations use the metric system. It is also simpler to convert from Celsius to Kelvin for this reason.

The letters °C or just C can be used to denote temperatures in Celsius as a number of degrees. The temperature difference between boils and ice is 100 degrees Celsius, whereas it is 180 ° Fahrenheit.

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Answer: No their are different chargers

No, Norbu cannot use the two thin copper wires to charge his mobile phone by inserting them directly into the socket.

Charging a mobile phone requires a proper charger and cable that are designed to regulate the flow of electricity and provide the appropriate voltage and current to the battery. Inserting copper wires directly into a socket is not only unsafe but also highly likely to result in electric shock, short-circuiting, overheating, or even causing a fire.

Using improper methods to charge electronic devices can lead to irreparable damage to the device, risk to personal safety, and damage to the electrical system. It's crucial to always use the correct and safe charging equipment provided by the manufacturer to ensure the safety of both the device and the user.

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Although it may not cover the full range of inclusivity aspects, such as representation and cultural sensitivity, creating accessible content is an important step towards inclusivity on social media platforms.

Based on the options provided, none of them specifically mention focusing primarily on tips for creating inclusive content on social media.

However, if we were to analyze the options and determine the most relevant choice, the closest option would be option A, "Create accessible video and social media."

While option A does not explicitly mention inclusive content, creating accessible content is an essential aspect of inclusivity.

Accessibility involves ensuring that content can be accessed and understood by a wide range of users, including those with disabilities.

By focusing on creating accessible video and social media, this resource may provide tips on making content inclusive for people with visual impairments, hearing impairments, cognitive disabilities, and other accessibility needs.

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We can use energy conservation to determine the initial velocity of the mass when it falls off a height l.

The potential energy at the top is mgl and the kinetic energy at the bottom is (1/2)mv².

The work done by the earth is given by

W = mgl.

So,

mgl = (1/2)mv² or v = √(2gl).

Thus,

v0 = √(2 × 3.42 × 12.3) = 9.746 m/s.b)

The time taken by the mass to fall from height l to the ground is given by:

t1 = √(2l/g) = √(2 × 12.3/2.53) = 2.835 s.c)

The time taken by the mass to travel from height l to the ground is given by:

t1 = √(2l/g) = √(2 × 6.5/2.54) = 1.801 s.

The time taken by the mass to travel from the ground to a height l is given by:

t2 = e√(2l/g) = 0.5 × √(2 × 6.5/2.54) = 0.901 s.

The total time taken by the mass is

tn = (n-1)t2 + t1

where n is the number of bounces')

The time taken by the mass to travel from the ground to a height l is given by:

t2 = e√(2l/g) = 0.43 × √(2 × 6.32/4.25) = 0.750 s.

The total time taken by the mass is

tn = (n-1)t2 + t1

where n is the number of bounces.

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Answer:

Below

Explanation:

Momentum =  m * v

momentum / m = v

2.1 / m = v

Cannot answer this with a specific numerical  value as we do not know the ball's mass (we should also have the units of momentum in question)

\( \underline{ \bf{\underline{\large{Terminal \: Velocity}}}}\)

True, it is possible for a fault to have a north-south (N-S) strike and an eastward dip.

Faults can have various orientations and dips depending on the tectonic forces and geological conditions in a particular region. The strike refers to the direction of the fault line on the Earth's surface, while the dip indicates the angle at which the fault plane is inclined from the horizontal. Therefore, a fault can have any combination of strike and dip, including an N-S strike and an eastward dip.

Faults are geological fractures where movement has occurred, and their orientations can vary. A fault with a north-south (N-S) strike means it extends in that direction horizontally. The dip refers to the angle of the fault plane from the horizontal. So, it is possible for a fault to have an N-S strike and an eastward dip.

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Answer:

25 m/s

Explanation:

This question can be solved using equation of motion

\(v^2 = u^2 + 2as\)

where

v is the final velocity

u is the initial velocity

s is the distance covered while moving from initial to final velocity

a is the acceleration

_____________________________________________

Given

box moved for distance of 62.5 m

Friction slows the box at –5.0 m/s2----> this statement means that there is deceleration , speed of truck decreases by 5 m/s in every second until the box comes to rest. Friction causes this deceleration.

thus in this problem

a = -5.0 m/s2

V = 0   as body came to rest due to friction deceleration

u the initial velocity we have to find

the initial velocity of box will be the same as speed of truck, as the box was in the truck and hence box will pick the speed of truck.

so if we find speed of box, we will be able get sped of truck as well.

using equation of motion

\(v^2 = u^2 + 2as\\0^2 = u^2 + 2*-5* 62.5\\0 = u^2 - 625\\u^2 = 625\\\sqrt{u^2} = \sqrt{625} \\u = 25\)

Thus, initial speed with the truck was travelling was 25 m/s.

Answer:

Electricity is measured in units of power called Watts,

hope this helps

have a good day :)

Explanation:

The magnetic field strength is directly related to the closeness of magnetic field lines around a bar magnet.

Magnetic field lines always emerge from the north pole and converge at the south pole. The density of magnetic field lines around a magnet indicates the strength of the magnetic field. When the magnetic field lines are closer together, it indicates that the magnetic field is stronger, and when they are farther apart, it indicates that the magnetic field is weaker. The pattern of magnetic field lines can be visualized using iron filings or a compass, which will align with the magnetic field lines.

This relationship has important practical applications in various fields such as engineering, physics, and medicine. It is used in the design of electric motors, generators, and transformers, as well as in magnetic resonance imaging (MRI) machines for medical diagnosis.

Overall, understanding the relationship between the magnetic field strength and the closeness of the magnetic field lines is essential for understanding the behavior of magnets and for the development of many technologies.

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