what is kinematics?

explain ~​

Answer:

Explanation:

Sensorimotor Infants "think" by acting on the world with their eyes, ears, hands, and mouth.

Preoperational. Development of language and make-believe play takes place.

Concrete Operational children think in a logical, organized fashion only when dealing with concrete information they can perceive directly.

Formal Operational.  Adolescences  can also evaluate the logic of verbal statements without referring to real-world circumstances.

Sensorimotor, preoperational, concrete operational, and formal operational are Piaget's four phases of cognitive development.

The way youngsters think, investigate, and figure things out is referred to as cognitive development.

Piaget defined four stages of cognitive development:

1. Sensorimotor. From birth through the age of 18-24 months.

2. Preoperational.From infancy (18-24 months) until toddlerhood (age 7)

3. Operational concrete. 7 to 11 years old

4. Formal operational. From adolescence to adulthood

Hence, sensorimotor, preoperational, concrete operational, and formal operational are Piaget's four phases of cognitive development.

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Answer:57,750J

Explanation:

If Player A has a mass of 90 kg and Player B has a mass of 75 kg, Player B will move in the opposite direction.

A collision is defined in physics as any occurrence in which a number of bodies exert forces on one another over relatively brief period of time. Although the most popular meaning of the term collision refers to occurrences wherein two or even more objects crash violently.

Two football players collide in elastically in a tackle, initially moving with the same speed in opposite directions (as indicated in the picture). If Player A has a mass of 90 kg and Player B has a mass of 75 kg, Player B will move in the opposite direction.

Therefore,  if Player A has a mass of 90 kg and Player B has a mass of 75 kg, Player B will move in the opposite direction.

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In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.

This relationship is described by the equation for the generated emf in a DC generator:

Emf = Φ * N * A * Z / 60

Where:

Emf is the generated electromotive force (in volts),

Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),

N is the number of turns in the armature winding,

A is the effective area of the armature coil (in square meters),

Z is the total number of armature conductors, and

60 is a constant representing the conversion from seconds to minutes.

From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.

The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.

The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.

Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.

By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.

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The current in the circuit is 2.5 A.

Voltage across the wire AX, V = 4 - 2 = 2V

Resistance per unit length of wire AX, R/l = 2 Ω/m

Length of the wire, l = 0.4 m

Resistance of the wire,

R = R/l x R

R = 2 x 0.4 = 0.8 Ω

According to Ohm's law, the current in the wire AX,

I = V/R

I = 2/0.8

I = 2.5 A

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i) The initial deceleration of the car is -1.6 m/s² and  the time taken is 5 seconds

ii) The final deceleration is -1 m/s²

iii) The total dispalcement = 1016 m

The initial deceleration of the car is given by the formula below:

v² = u² + 2as

where;

Solving for a;

12² = 20² + 2 * a * 80

a = -1.6 m/s²

Time taken, t = v - u / a

t = 12 - 20 / (-1.6)

t = 5 seconds

Final deceleration:

a = v - u / t

a = 0 - 12 / 12

a = -1 m/s²

iii) Displacement at constant velocity = 12 * 1 * 60

Displacement at constant velocity = 720 m

Final displacement, s = ut + 0.5at²

s = 12 * 12 + 0.5 * 1 * 12²

s = 216 m

Total dispalcement = 80 + 720 + 216

Total dispalcement = 1016 m

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The net force on particle q₂, located between particles q₁ and q₃, is approximately 189000 N. The force exerted by particle q₁ on q₂ is positive and equals 252000 N, while the force exerted by particle q₃ on q₂ is negative and equals -63000 N.

To find the net force on particle q₂, we need to calculate the individual forces exerted on q₂ by particles q₁ and q₃ and then determine their sum.

The force between two charged particles can be calculated using Coulomb's law:

F = k * |q₁ * q₂| / r²

Where F is the force between the particles, k is the electrostatic constant (k ≈ 9.0 x \(10^9\) Nm²/C²), q₁ and q₂ are the charges of the particles, and r is the distance between them.

First, let's calculate the force exerted on q₂ by q₁:

F₁₂ = k * |q₁ * q₂| / r₁₂²

F₁₂ = (9.0 x \(10^9\) Nm²/C²) * |(8.0 μC) * (3.5 μC)| / (0.10 m)²

F₁₂ ≈ 252000 N

The force is positive because q₁ and q₂ have opposite charges.

Next, let's calculate the force exerted on q₂ by q₃:

F₂₃ = k * |q₂ * q₃| / r₂₃²

F₂₃ = (9.0 x \(10^9\)Nm²/C²) * |(3.5 μC) * (-2.5 μC)| / (0.15 m)²

F₂₃ ≈ -63000 N

The force is negative because q₂ and q₃ have the same charge.

Finally, we can find the net force on q₂ by summing the individual forces:

Net force = F₁₂ + F₂₃

Net force = 252000 N + (-63000 N)

Net force ≈ 189000 N

The net force on particle q₂ is approximately 189000 N.

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Answer:

As the ball falls from C to E, potential energy is converted to kinetic energy. The velocity of the ball increases as it falls, which means that the ball attains its greatest velocity, and thus its greatest kinetic energy

Explanation:

Answer:As the ball falls from C to E, potential energy is converted to kinetic energy. The velocity of the ball increases as it falls, which means that the ball attains its greatest velocity, and thus its greatest kinetic energy

Explanation:

Answer:

In the absence of thrust, the lander continues to accelerate downward. As it approaches the surface, use maximum thrust until you get the velocity near zero, then turn off force. Allow it to pick up downward speed and repeat briefly, as necessary. The most important thing is to not waste fuel by “hovering” in one place, or worse, going upward!

The lander keeps speeding downward in the lack of thrust. The most crucial element is to avoid wasting gasoline by moving upward or, worse, by "hovering" in one position.

When an aircraft changes the distance in relation to the time, then this is known as velocity. This quantity comes under the category of a vector quantity. In math, the velocity is calculated by dividing the distance by the time.

Allow the airplane to begin to descend, then short repeat as necessary. The most crucial element is to avoid wasting gasoline by moving upward or, worse, by "hovering" in one position.

13,500 newtons of thrust are the bare minimum needed to launch the lander from its position of rest.

Since the lander is at rest, there is no net force acting on it. This state of rest is changed to upward motion by the propulsion of 13,500 newtons, proving that the force of gravity acting on the lander is less than 13,500 newtons.

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The current required by the 60W bulb is three-fifths that required by the 110W bulb

The formula for calculating power is as follows:

Assuming the voltage across the light bulbs is the same

From the formula, P = IV;

I = P/V

For the 60 W bulb

I₁ = 60/V

For the 100W bulb

I₂ = 100/V

Taking ratios of the currents:

I₁/I₂ = {60/V}/{`100/V}

I₁/I₂ = 3/5

Therefore, the current required by the 60W bulb is three-fifths that required by the 110W bulb

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Answer:

1.4 m/s to the left

Explanation:

just took it c:

The kangaroo is in the air for approximately 0.667 seconds.

Velocity is defined as the displacement of the object in a given amount of time and is referred to as velocity.

A kangaroo with a vertical speed of 6.57 m/s may jump over an object 2.20 m high.

To find the time a kangaroo is in the air, we need to calculate the time it takes to reach the peak of its jump and then double that time (to account for both the ascent and descent).

We can use the formula for vertical motion under constant acceleration (g = 9.8 m/s²):

t = √(2h / g)

where h is the height of the jump (2.20 m) and g is the acceleration due to gravity (9.8 m/s²).

Plugging in the values, we get:

t = √(2 × 2.20 m / 9.8 m/s²)

t = √(0.447)

t ≈ 0.667 s

So the kangaroo is in the air for approximately 0.667 seconds.

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Option c is the correct option.

Newton's first rule of motion states that an object must have constant velocity when there is zero net force acting on it.

A physical item (body) in motion would stay in its state of motion at constant velocity at the same speed and direction, or if at rest, it would remain at rest until it is acted upon by an external force, according to Newton's First Law of Motion, often known as the Law of Inertia.

Newton's First Law of Motion states that an item or body must move at a constant speed when there is no net force acting on it because else its acceleration would also be zero.

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\(l = 40cm \\ \bold \red{area \: of \: cross \: section} \: a = 0.1mm {}^{2} \\ = \frac{0.1}{100} cm {}^{2} \\ \\ \R = 0.8 Ω \\ \\ \bold \green{ Specific \: Resistance \: of \: wire \:ρ } = \frac{Ra}{l} \\ = \frac{0.8}{40} \times \frac{1}{100} \\ \\ ρ = 0.00002Ω - cm\)

Hope This Helps!!

The specific resistance of the wire is 2.0 × 10⁻⁷ Ωm

From the question, we are to determine the specific resistance of the wire

From the formula,

\(\rho = \frac{RA}{l}\)

Where \(\rho\) is the specific resistance or resistivity

R is the resistance

A is the cross section area

and \(l\) is the length of the wire

From the given information

\(l = 40\ cm = 0.4 \ m\)

\(A = 0.1 \ mm^{2} = 0.1 \times 10^{-6} \ m^{2}\)

R = 0.8 Ω

Putting the parameters into the formula, we get

\(\rho = \frac{0.8 \times 0.1 \times 10^{-6} }{0.4}\)

Then,

\(\rho = 2.0 \times 10^{-7}\) Ωm

Hence, the specific resistance of the wire is 2.0 × 10⁻⁷ Ωm

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Solving Gaussian integration with polar coordinates involves converting the integral into polar coordinates, finding the mean and standard deviation of the function, substituting them into the Gaussian distribution formula, and integrating it over the range of the function in polar coordinates.

Gaussian integration with polar coordinates is the process of finding the integral of a function using polar coordinates and the Gaussian distribution. The polar coordinate system is a two-dimensional coordinate system that uses the radius and angle to locate a point in a plane. The Gaussian distribution is a probability distribution that is often used to describe random variables in statistics.
To solve the Gaussian integration with polar coordinates, we need to convert the integral into polar coordinates. The conversion is done using the following equations:
x = r cos(θ)
y = r sin(θ)
r² = x² + y²
θ = tan⁻¹(y/x)
Once the integral is converted into polar coordinates, we can use the Gaussian distribution to solve it. The Gaussian distribution is given by the following formula:
f(x) = (1/σ√(2π))e^(-(x-μ)²/2σ²)
where μ is the mean of the distribution and σ is the standard deviation. To use this formula, we need to first find the mean and standard deviation of the function we are integrating.
After finding the mean and standard deviation, we can substitute them into the Gaussian distribution formula and integrate it over the range of the function in polar coordinates. The result of the integration will be the value of the integral.
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Answer:

hope it helps

Explanation:

1. flowing water

2.wind

3. hydroelectric power station

4. dam

5. lake

6. gravitational

7. renewable

8. fuel

9. pollution

10. expensive

11. flood

Answer:

Joule ;)

Explanation:

In the case of work (and also energy), the standard metric unit is the Joule (abbreviated J). One Joule is equivalent to one Newton of force causing a displacement of one meter. In other words, The Joule is the unit of work.

Hope this helps!

Answer:

Explanation:

Joule

In the case of work (and also energy), the standard metric unit is the Joule (abbreviated J). One Joule is equivalent to one Newton of force causing a displacement of one meter. In other words, The Joule is the unit of work.

A wind turbine transfers kinetic energy to mechanical energy from energy stores, which is then used to generate electricity.

Wind energy is a type of renewable source of energy that can be used for converting it into electrical energy by the use of turbines that transform mechanical energy into electricity, which is then used for different purposes (both industrial and  particular home usage).

Therefore, with this data, we can see that wind energy can be used to generate electricity by means of turbines that convert mechanical energy into electricity.

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30 moles of oxygen are needed to produce 18 moles of water and 30 moles of carbon dioxide.

The balanced chemical equation for the reaction between water and carbon dioxide to form glucose and oxygen can be written as:

C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O

From the equation, it is clear that for every mole of glucose, 6 moles of oxygen are needed. We can use this information to determine the number of moles of oxygen required to produce 18 moles of water and 30 moles of carbon dioxide.

First, we need to find the number of moles of glucose produced, which can be calculated by dividing the number of moles of carbon dioxide produced by 6:

30 moles CO₂ / 6 = 5 moles glucose

Since 6 moles of oxygen are needed for every mole of glucose, we can now calculate the number of moles of oxygen required:

5 moles glucose x 6 moles O₂/mole glucose = 30 moles O₂

So, 30 moles of oxygen are needed to produce 18 moles of water and 30 moles of carbon dioxide.

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The statement that is true about the theory of plate tectonics and the theory of continental drift C. The theory of plate tectonics gives the method by which continents can move as part of plates .

According to the scientific hypothesis of plate tectonics, the underground movements of the Earth create the primary landforms. By explaining a wide range of phenomena, including as mountain-building events, volcanoes, and earthquakes, the theory, which became firmly established in the 1960s, revolutionized the earth sciences.

The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.

According to tectonic theory, the Earth's surface is dynamic and can move up to 1-2 inches every year. The numerous tectonic plates constantly move and interact. The outer layer of the Earth is altered by this motion. The result is earthquakes, volcanoes, and mountains.

Therefore, option C is correct.

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Answer:

The required frequency = 0.442 Hz

Explanation:

Frequency \(f = ( \dfrac{1}{2 \pi}) \omega\)

where;

\(\omega = \sqrt{\dfrac{k}{m} }\)

Then;

\(f = \Bigg ( \dfrac{1}{2 \pi} \Bigg ) \Bigg( \sqrt{\dfrac{k}{m} } \Bigg )\)

However;

\(k = \dfrac{F}{x}\) and;

mass \(m = m_{car } + m_{person}\)

\(f = \Bigg ( \dfrac{1}{2 \pi} \Bigg ) \Bigg( \sqrt{\dfrac{\dfrac{F}{x}}{m_{car}+m_{person}} } \Bigg )\)

\(f = \Bigg ( \dfrac{1}{2 \pi} \Bigg ) \Bigg( \sqrt{\dfrac{{F}}{x(m_{car}+m_{person})} } \Bigg )\)

where;

\(F = m_{person}g\)

Then;

\(f = \Bigg ( \dfrac{1}{2 \pi} \Bigg ) \Bigg( \sqrt{\dfrac{ {m_{person}g }}{x(m_{car}+m_{person})} } \Bigg )\)

replacing the values;

\(f = \Bigg ( \dfrac{1}{2 \pi} \Bigg ) \Bigg( \sqrt{\dfrac{ {(88 \ kg)* (9.81 \ m/s^2) }}{(5.36 \times 10^{-2} \ m) (2002 \ kg +88 \ kg)} } \Bigg )\)

\(\mathbf{f = 0.442 \ Hz}\)

Answer: how to read blueprint, how to use power tools, how to plan and complete an electrical installation for a dwelling, how to interpret the rules regulation of the Ontario Building code

Explanation:

One Newton is equal to the amount of force needed to accelerate a 1 kg mass to 1 m/sec2.

A Newton is the SI unit of force. It is named in honor of Sir Isaac Newton, the English mathematician and physicist who developed laws of classical mechanics.

The symbol for newton is N. A capital letter is used because the newton is named for a person.

One newton is equal to the amount of force needed to accelerate a 1 kg mass 1 m/sec2. This makes the newton a derived unit because its definition is based on other units.

1 N = 1 kg·m/s2

The newton comes from Newton's second law of motion, which states:

F = ma

where F is force, m is mass, and a is acceleration. Using the SI units for force, mass, and acceleration, the units of the second law become:

1 N = 1 kg⋅m/s2

A newton is not a large amount of force.

In conclusion, a newton is the amount of force that can accelerate a 1kg of mass to 1m/s2.

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Tidal energy is the form of energy used to generate electrical energy.

The form of the energy is used to generate electrical energy in a tidal power station is kinetic energy.

Kinetic energy is the energy that an object has as a result of its movement. If we intend to accelerate an object, we should indeed apply force to it. Using force requires us to put in effort.

After work is completed, energy is transmitted to the object, and the object moves at a new constant speed.

Tidal energy is generated by the movement of our tides and oceans, where the intensity of the water from tide rise and fall is a type of kinetic energy.

Tidal power is related to gravitational hydropower, which uses water movement to propel a turbine and generate electricity.

Thus, kinetic energy is used to generate electrical energy in a tidal power station.

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(a) The acceleration of the system is 8.5 m/s².

(b) The tension in the cord connecting the 4.0 kg and 1.0 kg blocks is 42.5 N.

(c) The force exerted by the 1.0 kg block on the 2.0 kg block is 59.5 N.

To solve this problem, we can use Newton's second law of motion (F = ma) and consider the forces acting on each block individually.

(a) Determine the acceleration given this system:

To find the acceleration (a) of the system, we can use the net force acting on the 4.0 kg block (m3). The only force acting on m3 is the applied force (F = 34 N).

F = m3 * a

34 N = 4.0 kg * a

Solving for a, we find:

a = 34 N / 4.0 kg

a = 8.5 m/s²

Therefore, the acceleration of the system is 8.5 m/s².

(b) Determine the tension in the cord connecting the 4.0-kg and the 1.0-kg blocks:

To find the tension in the cord (T), we can consider the forces acting on the 1.0 kg block (m1).

T - F = m1 * a

T - 34 N = 1.0 kg * 8.5 m/s²

T - 34 N = 8.5 N

T = 42.5 N

Therefore, the tension in the cord connecting the 4.0 kg and 1.0 kg blocks is 42.5 N.

(c) Determine the force exerted by the 1.0-kg block on the 2.0-kg block:

To find the force exerted by the 1.0 kg block (m1) on the 2.0 kg block (m2), we can consider the forces acting on the 2.0 kg block.

F - T = m2 * a

F - 42.5 N = 2.0 kg * 8.5 m/s²

F - 42.5 N = 17 N

F = 59.5 N

Therefore, the force exerted by the 1.0 kg block on the 2.0 kg block is 59.5 N.

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Answer:

W = 16.4 kJ

Explanation:

Given that,

There are 135 steps from the ground floor to the sixth floor.

Each step is 16.6 cm tall.

The mass of a person, m = 73.5 kg

We need to find the work done by the person. We know that,

Work done = Fd

Where

d is the displacement, d = 135 × 0.166 = 22.41

So,

W = 73.5 × 10 × 22.41

= 16471.35  J

or

W = 16.4 kJ

So, 16.4 kJ is the work done by the person.

Hi there!

Recall the equation for work given a potential difference and charge:
\(\large\boxed{W = qV}\)

W = Work (J)
q = charge (C)
V = Potential difference (V)

The work is equivalent to the change in KINETIC ENERGY, and only depends on the particle's charge and the potential difference that it experiences. Mass has no impact on this.

Thus:

\(W' = (2Q)(V) = 2W\)

This is equivalent to:

\(\large\boxed{2W = \text{ d) } 2K}}\)

The rate of acceleration of the hockey puck with a mass of 170 g is 0.88 m/s².

Acceleration can be defined as the rate of change of velocity.

To calculate the acceleration of the puck, use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, puck's rate of acceleration is 0.88 m/s².

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The total energy of all the particles makes up thermal energy. This implies that larger objects with slower-moving particles at low temperatures can have more energy than smaller ones with higher temperatures.

Thermal energy is the sum of the energies of all the particles. This implies that larger objects at low temperatures can have more energy than smaller ones at higher temperatures due to slower-moving particles.

These molecules and atoms move more quickly when something is heated, providing it with more thermal energy. Compared to cold water, hot water has more thermal energy.

Therefore, molecules and atoms in colder objects move more slowly and have less thermal energy than those in warmer ones. The ability of particles to transfer energy increases with speed.

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