According to Piaget's theory, infants develop behavioral schemes, whereas children develop ______ schemes. A) adaptive. B) active. C) mental. D) physical.

The net force acting on the cart is 2 N in left direction.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. Newton is the SI unit of force.

Jimi is pushing a large cart at work toward the left side of the store using 10N of force.

Jonah pushed the cart with 8 N of force toward the right side of the store.

Hence, the net force acting on the cart in left direction = ( 10 N - 8 N) = 2 N.

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Answer:

25v

Explanation:

right on edge

Since this is a circular motion, we know that the we have a centripetal acceleration; we know that this type of acceleration always points towards the center of the circle. This means that the acceleration is represented by the vectors that point towards the center. Looking at them we notice that at point Z the acceleration is pointing to the right.

Therefore, the object is accelerating to the right at Z

A) The linear model relating altitude a (in feet) and time in the air t (in seconds) is a = 0.0625t + 1593.75.

B) The rate of change of the parachutist in the air is 0.0625 feet per second.

C) The speed of the parachutist at landing is 0.0625 feet per second.

A) To find a linear model relating altitude a (in feet) and time in the air t (in seconds), we can use the formula for a linear equation: y = mx + b, where y represents the altitude (a) and x represents the time in the air (t).

Given that the jump at 1,600 feet lasts 100 seconds, we have the following data points: (1600, 100).

We can use these data points to determine the slope (m) and the y-intercept (b) of the linear equation.

Using the formula for slope (m):

m = (y2 - y1) / (x2 - x1)

m = (100 - 0) / (1600 - 0)

m = 0.0625

Now we can substitute the slope value and one of the data points into the linear equation to solve for the y-intercept (b).

Using the point-slope form: y - y1 = m(x - x1):

a - 1600 = 0.0625(t - 100)

Simplifying the equation:

a - 1600 = 0.0625t - 6.25

a = 0.0625t + 1593.75

Therefore, the linear model relating altitude a (in feet) and time in the air t (in seconds) is: a = 0.0625t + 1593.75.

B) The rate of change of the parachutist in the air is equal to the slope of the linear equation. Therefore, the rate of change is 0.0625 feet per second.

C) To find the speed of the parachutist at landing, we can use the fact that speed is equal to the rate of change of distance with respect to time. In this case, it is equal to the rate of change of altitude with respect to time.

Since the rate of change of altitude is 0.0625 feet per second, the speed of the parachutist at landing is 0.0625 feet per second.

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Answer:

Fe = 7.98*10^5N/C

Explanation:

In order to calculate the electric force between the two charges you use the following formula:

\(F_e=k\frac{q_1q_2}{r^2}\)           (1)

k: Coulomb's constant = 8.98*10^9Nm^2/C^2

q1 = 2mC = 2*10^-3C

q2 = 4mC = 4*10^-3C

r: distance between the charge = 30cm = 0.3m

You replace the values of the parameters in the equation (1):

\(F_e=(8.98*10^9Nm^2/C^2)\frac{(2*10^{-3}C)(4*10^{-3}C)}{(0.3)^2}\\\\F_e=7.98*10^5\frac{N}{C}\)

The force between the charges q1 and q2 is 7.98*10^5N/C

The gravitational potential energy the 100 Kg skydiver has, given that he jump from a height of 4000 m is 3920000 J

Potential energy is defined according to the following formula:

PE = mgh

Where

Using the above formula, we can obtain the potential energy of the skydiver as illustrated below:

PE = mgh

PE = 100 × 9.8 × 4000

PE = 3920000 J

Thus, the potential energy is 3920000 J

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The magnitude of their final momentum immediately after the collision is 51 Kgm/s and their direction immediately after the collision will be in the direction of the second skateboarder.

Momentum is the product of mass and velocity. Momentum can also be the product of force and time.

Given that two skateboarders collide and grab onto one another. If the first skateboarder has a momentum of 525 kg • m/s, and the second skateboarder had a momentum of -576 kg•m/s immediately before they collide, that means their collision was head - on - collision.

According to the conservation of linear momentum, the magnitude of the sum their final momentum immediately after the collision will be the same with the sum of the magnitude of their momentum before collision. That is,

Final momentum = 525 - 576

Final momentum = - 51kg•m/s

And their direction immediately after the collision will be in the direction of the second skateboarder.

Therefore, the magnitude of their final momentum immediately after the collision is 51 Kgm/s and their direction immediately after the collision will be in the direction of the second skateboarder.

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Answer:

-51

Explanation:

Khan Academy

The positions to be considered are the position of the acorn and the earth.

The potential energy is the energy that is possessed by a body by virtue of its position. Hence, the potential energy of a body changes as its position changes.

Hence, to determine how the potential energy of the acorn changes in relation to the earth, the positions to be considered are the position of the acorn and the earth.

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Answer:177.87

Explanation:

Answer:

Hope this helps if not so sorry ;-;

Explanation:

Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F *

Note:

Have a nice day :)

The amplitude is 0.45 m,

The period is 1.37 s,

The wavelength is 4.13 m, and

The speed is 3 m/s.

A wave is a disturbance that travels through a medium, transferring energy without transferring matter. Waves can be characterized by their amplitude, frequency, wavelength, and speed.

There are many types of waves, including mechanical waves (such as sound waves and water waves) and electromagnetic waves (such as light and radio waves). Waves are important in many areas of science and technology, from communication to medicine to engineering.

To solve this problem, we can use the following formulas:

Amplitude (A) = distance from the trough to the crest / 2 = 0.9 / 2 = 0.45 m

Period (T) = time for one wave to pass = 1.37 s

Wavelength (λ) = distance from crest to crest (or trough to trough) = 4.13 m

Speed (v) = λ / T = 4.13 / 1.37 = 3 m/s

Therefore, the amplitude is 0.45 m, the period is 1.37 s, the wavelength is 4.13 m, and the speed is 3 m/s.

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The correct answer is opposite to the displacement.

The spring force is the force which is exerted by the spring when it is attached with an object.

When we attach a spring to an object and the object is displaced from equilibrium, then there will be a force acting on the spring which will retract the spring to come back to equilibrium.

This is spring force.

According to the Newton's third law, there is always an equal and opposite force. Here, if we are applying a force to displace the object. This force is applied on the object so it is towards the object. Then there is an equal and opposite force which is applied on the spring which tends to pull the object back to its equilibrium position. This force which acts opposite to the displacement of the object to bring spring back to equilibrium is the spring force.

Therefore, we can conclude that, in general, the spring force always points opposite to the displacement from equilibrium.

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Answer:

450cm = 4.5m

24miles = 3862430 cm (3.9×10⁶cm)

16.7 gallons = 63.216 liters (approx.)

Explanation:

brainliest plz

Answer:

Granite is an excellent building material that provides some outstanding interior design opportunities whilst being incredibly sturdy and reliable. It has become one of the most popular building materials in modern construction, from kitchen surfaces through to paving slabs.You Can Expect Durability and Longevity. Firstly, marble is so popular around the world because of its durability in a wide variety of weather conditions. Structures that are over hundreds of years old made from marble are still standing to this day, and look as pristine as they day they were crafted.

Explanation:

The frequency of a 1.1 MeV gamma-ray photon is approximately 2.66 x 10²⁰ Hz.

We can use the equation E = hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the photon, to find the frequency of a 1.1 MeV gamma-ray photon.

First, we need to convert the energy of the photon from mega-electron volts (MeV) to joules (J) by multiplying it by the conversion factor 1.602 × 10⁻¹³ J/MeV:

E = 1.1 MeV * 1.602 × 10⁻¹³ J/MeV

E = 1.762 × 10⁻¹³ J

Next, we can rearrange the equation to solve for the frequency:

f = E/h

where h is Planck's constant, which has a value of 6.626 x 10⁻³⁴ joule-seconds.

Substituting the values, we get:

f = (1.762 × 10⁻¹³ J) / (6.626 x 10⁻³⁴ J-s)

f = 2.66 x 10²⁰ Hz

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Answer:

Scissors

Tap

Spanner

Explanation:

Radial component of the linear acceleration = 99.47 m/s^2

The diameter of the wheel, d = 51 cm

The radius, r = d/2 = 51/2 = 25.5 cm

r = 25.5/100 = 0.255 m

r = 0.255 m

At t = 1.1, first calculate the new angular velocity

The radial component of the linear acceleration is given as:

Frequency and nzl (number of zero crossings per unit length) are inversely proportional to each other according to the formula nzl = vf, where v is the velocity of the wave and f is the frequency.

The formula for nzl (refractive index minus one) is,

nzl = (c/vl) - 1

where c is the speed of light in a vacuum, and vl is the speed of light in the medium.

Frequency is not directly related to nzl in this formula. However, the refractive index (n) of a medium can depend on frequency. This is known as dispersion, and it means that different frequencies of light may experience different refractive indices and therefore different nzl values in a given medium. In other words, the nzl value can vary depending on the frequency of the light passing through the medium.

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In the electron-wave model of the atom, an electron in the second energy level contains a higher energy and a larger wave function compared to the electrons in the first energy level.

This is due to the increased distance from the nucleus, which results in a larger orbital and a greater number of nodes in the electron's wave function.

In the electron-wave model of the atom, the second energy level (n=2) can hold up to 8 electrons, each with its unique wave function and energy level. However, the model does not associate a specific attribute, such as "contains," with an individual electron in the second energy level. Instead, the model describes the behavior of electrons in terms of wave functions and probabilities, which can be used to predict the likelihood of finding an electron in a specific location or energy state.

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To investigate the relationship between surface-type and frictional force, the steps to be followed are Identify the variables, Select a range of surface types, Prepare the materials, Set up the experiment, Conduct trials, Analyze data and Draw conclusions.

Here's a step-by-step guide:

1. Identify the variables: In this case, the independent variable is the surface-type, while the dependent variable is the frictional force.

2. Select a range of surface types: Choose various surface types, such as smooth (e.g., glass), moderately rough (e.g., wood), and rough (e.g., sandpaper) to test the relationship.

3. Prepare the materials: Gather a flat, rectangular object to slide across the surfaces, a spring scale or force sensor to measure the frictional force, and a device to ensure consistent angle and speed for each trial.

4. Set up the experiment: Lay each surface-type horizontally on a sturdy table. Attach the spring scale or force sensor to the flat object and ensure that the pulling angle and speed remain consistent for each trial.

5. Conduct trials: For each surface type, pull the flat object using the spring scale or force sensor at a consistent speed and angle, and record the frictional force measurements. Perform multiple trials for each surface to account for any discrepancies and improve the accuracy of your results.

6. Analyze data: Calculate the average frictional force for each surface type and create a table or graph to display your findings.

7. Draw conclusions: Based on the data, determine if there's a relationship between surface-type and frictional force. Observe any trends in your results, such as an increase in frictional force with rougher surfaces.

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Human roles in energy transition are:

By taking these steps, you can actively contribute to the energy transition and be a part of the movement toward a more sustainable and clean energy future.

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Answer: The molecules in gases are different from other states of matter

Explanation:

The molecules in gases are different from other states of matter because unlike, for example, a solid, they move around freely and are much more spread apart. A gas can fill up any container, but once the container is unsealed, the gasses will immedietly be let out. Gases can be compressed much more easily than a solid or a liquid.

The consumers lose since the price has increased and the producers gain from the merger. Therefore, the compensation principle is not satisfied.

a) The market was initially not competitive because the average cost, which was constant across firms before the merger, suggests that there was only one firm operating in the market since we see that average cost (AC0) is constant across all levels of production.

b) Graphical representation of the Williamson model with the given parameters:

c) The merged firm finds the merger profitable because the total profit of the merged firm has increased from (120-100)*Q to (160-80)*Q, which results in an increase in profit of 80Q per unit. d).

The total surplus that is lost from the merger is 800 and the total surplus that is gained from the merger is 400. e) .

The merger does not satisfy the compensation principle because not all parties benefit from the merger. The consumers lose since the price has increased and the producers gain from the merger. Therefore, the compensation principle is not satisfied.

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a) The market was initially not competitive because the average cost, which was constant across firms. b)  Graphical representation of the Williamson model with the given parameters. c) The compensation principle is not satisfied.

a) The market was initially not competitive because the average cost, which was constant across firms before the merger, suggests that there was only one firm operating in the market since we see that average cost (AC0) is constant across all levels of production.

b) Graphical representation of the Williamson model with the given parameters:

c) The merged firm finds the merger profitable because the total profit of the merged firm has increased from (120-100)*Q to (160-80)*Q, which results in an increase in profit of 80Q per unit. d).

The total surplus that is lost from the merger is 800 and the total surplus that is gained from the merger is 400. e) .

The merger does not satisfy the compensation principle because not all parties benefit from the merger. The consumers lose since the price has increased and the producers gain from the merger. Therefore, the compensation principle is not satisfied.

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The mass flow rate of the pump is 2.8 kg/s.

Given the density of the oil (kerosene) to be ρ= 0.75 kg/L

The volume of oil is equal to 10,000 L1 L = 0.001 m³Volume of oil = 10,000 × 0.001 = 10 m³Density of oil = mass/volume ⇒ mass = density × volume

Let m be the mass of oil.

m = ρV = 0.75 × 10 = 7.5 kg

The time taken to empty the tank is 45 minutes. 1 minute = 60 seconds

The time taken is t = 45 × 60 = 2,700 seconds.

Let the mass flow rate be m′. The mass flow rate is defined as the mass of fluid flowing per unit time.m′ = m/t = 7.5/2,700 kg/s= 0.00278 kg/s

Therefore, the mass flow rate of the pump is 2.8 kg/s.

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=========================================================

Explanation:

amu = atomic mass unit

If the amu is 61, and we have 33 neutrons, then there are 61-33 = 28 protons. The number of protons directly determines the element. Use the periodic table to find that the element Nickel (symbol "Ni") has 28 protons. The number up top shows the number of protons. For some periodic tables, the number down below (some decimal value) represents the atomic mass. This is usually the average atomic mass when considering all varieties of isotopes.

Nickel is a transition metal found in the middle portion of the periodic table, in the top-most row. It has Cobalt (Co) on the left side, Copper (Cu) on the right side, and Palladium (Pd) below it. See the diagram below.

Answer:

2.04m

Explanation:

PE=mgh

h= PE/mg

h= 40/2(9.82)

h=40/19.64

h=2.04

Answer:

\(20m\)

Explanation:

Formula to find the potential energy is,

Potential Energy = mgh

Here,

m = mass

g = gravitational field

h = height

According to the question, we have to find the height.

Usually, we get g is \(10ms^{-2}\)

Let us solve for the answer now.

\(P.E. =mgh\\40J =2kg*10ms^{-2} *h\\40 = 20h\\\frac{40}{20}= \frac{20h}{20} \\20m=h\)

Hope this helps you.

Let me know if you have any other questions :-)

To find the equilibrium output and income in a closed economy, we need to equate aggregate expenditure (AE) with output (Y) or income (Y). In equilibrium, aggregate expenditure is equal to output/income.

Aggregate expenditure (AE) is the sum of consumption (C), investment (I), and government spending (G). The consumption function is given as C = 250 + 0.50Yd, where Yd represents disposable income.

Substituting the given values:

In equilibrium, AE = Y, so we can equate the two equations:

Simplifying the equation:

Now, we need to find Y (output/income). Yd is disposable income, which is equal to output/income minus taxes (in this case, there are no taxes). Therefore, Y = Yd.

Hence, the equilibrium output and income in the closed economy is approximately 800 (rounded to the nearest whole value).

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Free body diagrams are used in mechanics problems to illustrate forces and moments applied to a body and to compute reactions.

The relative strength and direction of all forces operating on an object in a specific circumstance can be depicted using free body diagrams (FBDs), which are helpful tools. The careful creation of a free-body diagram is a prerequisite for the analysis and description of the majority of physical processes. In a free body diagram, the size of the arrow represents the force's magnitude, while the direction of the arrow represents the way it acts.

These diagrams are widely used to compute internal forces within a structure, as well as to determine the loading of certain structural components.

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Answer:

Tension in the chains - In a chain drive, technically, you have a closed-chain (which has no end) going around 2 pulley or gears; looking closely you have 2 parallel chains going in opposite direction. If kept in horizontal direction, the one below the other is the slack side and the other the tight side. The tension on the upper or tight side is more than the slack side. So you need to keep in mind to keep your chain drive tight so that there is no loss or rotation or lags.

Sizes of the pulley/gear - The chain will be warped around a pair of pulley or gear. The sizes of these pulley/gear will also determine the efficiency of the chain drive (consider one big and one small)

Number of pulley/gear - If the number of pulley/gear is more and chain wrapped on it with little complexity will result in decrease in efficiency because of extra tension.

Length of the chain drive - You cannot have much too long chain drive. It will make your slack side more heavy because the end are further away. You have to apply more power and possibilities of lag increases decreasing efficiency. In an ideal situation, this won't happen, but this world isn't ideal.

Friction between chains & pulley/gear - If you have studied gears (involving its teeth), you will come to know that there is friction offered on the two meeting surfaces.

Angle of contact - This would have been explained better with a diagram. Although, if you are familiar with the terms you won't have difficulty understanding. Angle of contact is the angle the chain forms with the pulley/gear at the point of contact with the center of the pulley. The angle of contact should not be too small, or else the things will be slippery.

Explanation: