Marta , who is only 5years old , heard her mother use a curse word and is now repeating that word much to the embarrassment of her parents. It was especially upsetting when she used it ik n church! By explaining to Marta that word is not nice and then ignoring her use of the word , her parents are pleased when the word disappeared from her vocabulary. Which concept of learning does this mostly demonstrate?

Answer:

a

Explanation:

The correct answer would be that the apparent depth of the object is less than the real depth.

The refractive property of light as it passes from air to water would make the depth of the pool appear less shallow than the actual depth to an observed. Hence, an object placed at the bottom of the pool will have an apparent depth that is shallower than its actual depth.

Due to the difference in the density of air and that of water, as the ray of light from an observer standing at the edge of a swimming pool travels from air into the water, it becomes refracted by bending away from the original traveling angle.

The same refraction occurs when light rays from an object inside the pool travel from water into the air. Hence, due to the refraction of the ray of light coming from the object at the bottom of the pool, the depth appears shallower than the actual depth.

Correct option: a

The velocity of particle 2 when it is 1cm away from particle 1 is determined as 62.18 m/s.

The electrostatic force between the two charges is calculated as follows;

F = (kq1q2)/(r²)

F = (9 x 10⁹ x 4.5 x 10⁻⁶ x 3.1 x 10⁻⁶)/(0.037)²

F = 91.71 N

F = ma

a = F/m

a = (91.71 N)/(0.0069 kg)

a = 13,291.2 m/s²

v² = u² + 2as

v² = 60² + 2(13,291.2)(0.01)

v² = 3865.82

v = 62.18 m/s

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Answer:

abiotic

Explanation:

goggle:)))))))

The rate at which heat is rejected from the turbine is 14,000kW and the area of the inlet is 0.1417m²

To find the heat rejected from the turbine, we apply the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.

Mathematically,

    ΔU = Q - W

where

ΔU = change in internal energy,

Q = heat added to the system,

W = work done by the system.

Assuming the gas turbine unit operates under steady-state conditions, the change in internal energy of the gases passing through the turbine is negligible. With that we can say, the heat rejected by the turbine is equal to the work done by the turbine:

    Q = W = 14,000 kW

Therefore, the rate at which heat is rejected from the turbine is 14,000 kW.

To find the area of the inlet pipe, we can use the continuity equation:

m = ρ * A * V

but we are given:

m = mass flow rate = 17kg/s

V= velocity = 60m/s

v = specific volume = 0.5m³/kg

ρ = density =  1/v = 1/0.5 = 2kg/m

By making A the subject of the formula we have,

A = m / (ρ * V)

A = 17 / (2 * 60)

A = 0.1417 m²

Therefore, the area of the inlet pipe is approximately 0.1417 m².

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a. The magnitude of the electric force that one particle exerts on the other is 1.72 millinewtons (mN). and b. the force is repulsive

To calculate the magnitude of the electric force between two charged particles, we can use Coulomb's Law, which states that the magnitude of the electric force (F) between two charged objects is given by:

F = k * (|q1| * |q2|) / r^2

where k is the electrostatic constant (k = 8.99 x 10^9 N·m^2/C^2), q1 and q2 are the charges of the particles, and r is the distance between them.

Given:

q1 = 8.01 nC (nanocoulombs)

q2 = 4.22 nC (nanocoulombs)

r = 1.72 m

Converting the charges to coulombs:

q1 = 8.01 x 10^-9 C

q2 = 4.22 x 10^-9 C

Plugging the values into Coulomb's Law:

F = (8.99 x 10^9 N·m^2/C^2) * ((8.01 x 10^-9 C) * (4.22 x 10^-9 C)) / (1.72 m)^2

Calculating the magnitude of the force:

F ≈ 1.72 x 10^-3 N

Therefore, the magnitude of the electric force that one particle exerts on the other is approximately 1.72 millinewtons (mN).

To determine if the force is attractive or repulsive, we need to consider the signs of the charges. If the charges have opposite signs (one positive and one negative), the force is attractive. If the charges have the same sign (both positive or both negative), the force is repulsive.

In this case, both charges are positive, so the force between them is repulsive. The particles will experience a repelling force due to their like charges, causing them to push away from each other.

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Two charged particles are a distance of 1.72 m from each other. One of the particles has a charge of 8.01 nC, and the other has a charge of 4.22 nC.  

(a) What is the magnitude (in N) of the electric force that one particle exerts on the other?

(b) Is the force attractive or repulsive?

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The graph below shows the motion of a person leaving theater, line segment C represent : The person is moving away from the theater.

In physics, motion is a change with time of the position or orientation of a body. Motion along a line or a curve is called as translation whereas motion that changes orientation of a body is called rotation.

Motion is a change in position of an object over the  time and is described in terms of displacement, distance, velocity, acceleration, time and speed.

Change in position of a body with time when compared with another body is known as  motion.

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The efficiency of the steam engine is 78.9%.

The efficiency of a machine is a measure of the useful work done by the machine as against the work input into the machine.

Work output of the steam engine = 225 K

Work input of the steam engine = 285 K

The efficiency of the machine = 225/275 × 100% = 78.9%

Therefore, the efficiency of the steam engine is 78.9%.

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Answer:

I dont. understand the question, maybe insert the picture?

To find the kinetic energy at position B, we need to know the height or the velocity at position B. Without this information, we cannot calculate the exact value of the kinetic energy.

To determine the kinetic energy of the ball at position B, we need to consider the m conservation of Mechanical energy. Since the ball is released from position A, we can assume that there is no initial kinetic energy (velocity is zero), and the total mechanical energy at position A is equal to the potential energy.

The potential energy at position A can be calculated using the formula:

Potential energy at A = mass * gravitational acceleration * height

Potential energy at A = 20 kg * 9.8 m/s² * height

Now, at position B, all the potential energy is converted into kinetic energy. The kinetic energy at position B is given by the formula:

Kinetic energy at B = 1/2 * mass * velocity²

Since the ball is released from rest, the velocity at position B can be determined using the conservation of mechanical energy:

Potential energy at A = Kinetic energy at B

20 kg * 9.8 m/s² * height = 1/2 * 20 kg * velocity²

Simplifying the equation, we get:

9.8 m/s² * height = 1/2 * velocity²

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An expression for the density of liquid B, is ρ₁(d₁ - d₂)/d₃.

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure.

The pascal (Pa) is the pressure unit used in SI. A force of one newton applied across a surface area of one meter square is referred to as a pascal.

At equilibrium, the pressure of two tube is same. Use this concept and get:

The  density of liquid B: ρ₂ = ρ₁(d₁ - d₂)/d₃

Hence,  an expression for the density of liquid B, is ρ₁(d₁ - d₂)/d₃.

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Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

Answer: Equal and Opposite

Explanation:

The linear speed will be the insect be 0.5759 meter/second carried collision with the near stationary photograph.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given that an insect lands 0.1m from the center of the turn table.

Rotational speed of the turn table = 55 rev/min

= (55×2π/60) rad/second

= 5.759 rad/second.

Hence, the speed of the insect be = Rotational speed × length

= 5.759 rad/second × 0.1 M.

= 0.5759 meter/second.

Therefore, the speed of the insect be 0.5759 meter/second.

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Answer:

dependent, independent

Explanation:

In a controlled experiment, the dependent variable is the factor whose outcome depends on the independent variable.

For example, if you push a box harder, it will go further. Here distance moved by the box is dependent on the amount of force you push it with. So, in this case, distance is dependent variable, and force is independent variable

- The resistance of the first resistor (R₁) is 12 Ω.

- The electromotive force (EMF) of the battery is 18 V.

- The internal resistance of the battery is 12 Ω.

To solve the given problem, we can apply Kirchhoff's laws and Ohm's law to determine the resistance of the first resistor (R₁) and the electromotive force (EMF) and internal resistance of the battery.

Let's start by calculating the resistance of the first resistor (R₁):

1. Apply Ohm's law to find the voltage drop across the external circuit:

  V = I * R

  V = 1 A * 6 Ω

  V = 6 V

2. The voltage drop across the external circuit is equal to the EMF minus the voltage drop across the internal resistance of the battery:

  V = E - Ir

  6 V = E - (1 A * r)   (where r is the internal resistance of the battery)

3. We also know that the EMF of the battery is the sum of the voltage drops across each cell in the battery:

  E = 6 cells * 3 V/cell

  E = 18 V

4. Substitute the value of E in the equation from step 2:

  6 V = 18 V - r

  r = 12 Ω

Therefore, the resistance of the first resistor (R₁) is 12 Ω.

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Answer:

W = 47.04 N

Explanation:

It is given that,

A block of mass 4.8 kg is suspended by the pulley and it is assumed that it is frictionless and the mass of the strings to be negligible.

We need to find the reading of the spring scale if the system is in equilibrium.

At this position, the scale reading is equal to the weight of the block such that,

W = mg, where g is the acceleration due to gravity

W = 4.8 kg × 9.8 m/s²

W = 47.04 N

So, the reading of the spring scale is 47.04 N.

Answer: Here you go, i hope this kinda helps.

Explanation:Disambiguation is just a fancy way of saying "asking clarifying questions".

Watson Assistant replies to user's questions based on a confidence score.

Sometimes the customer's question could be interpreted in two or three different ways.

For example, if you say you'd like to "book a table for 8", the assistant is able to ask a clarifying question:

Did you mean booking a table for 8PM, 8AM, or booking a table for 8 guests?

Watson Assistant will ask the question when its confidence score is divided between a few options to ensure that your customers get exactly the right service they need.

The time of descent if a body is projected vertically dawn ward with a velocity of 5 m/sec from a height of 60 m is 3 seconds.

When an item is moving, its velocity indicates how quickly its location is changing as seen from a specific point of view and as measured by a specific unit of time.

If a point travels a specific distance along its path in a predetermined amount of time, its average speed throughout that time is equal to the traveled distance divided by the travel time. For instance, a train traveling 100 km in two hours is moving at an average speed of 50 km/h.

Given:

The velocity, u = 5 m / sec,

The height of the body, s = 60 m,

We know that,

\(s = ut + 1/2at^2\)

Here t is the time of descent and a is the gravitational acceleration.

Substitute the values,

60 = 5 × t + 1/2 × 9.8 × t²,

4.9t² + 5t - 60 = 0

Solve for the value of t we get,

x = 3.02607

x = −4.04647, but time cannot be negative,

Therefore, the time of descent if a body is projected vertically dawn ward with a velocity of 5 m/sec from a height of 60 m is 3 seconds.

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Answer:

It's true

Explanation:

Because the ship is mafe up of aluminium, which is a light metal.

Answer:

False

Explanation:

Took The Quiz

Answer:

1)copper wire

Explanation:

it is the best electric conductor

The average acceleration of the motorcycle over the given distance is approximately 9.39 m/s².

To calculate the average acceleration of the motorcycle, we can use the formula:

Average acceleration = (final velocity - initial velocity) / time

First, let's convert the final velocity from km/h to m/s since the distance is given in meters. We know that 1 km/h is equal to 0.2778 m/s.

Converting the final velocity:

Final velocity = 78 km/h * 0.2778 m/s = 21.67 m/s

Since the motorcycle starts from rest (initial velocity is zero), the formula becomes:

Average acceleration = (21.67 m/s - 0 m/s) / time

To find the time taken to reach this velocity, we need to use the formula for average speed:

Average speed = total distance/time

Rearranging the formula:

time = total distance / average speed

Plugging in the values:

time = 50 m / 21.67 m/s ≈ 2.31 seconds

Now we can calculate the average acceleration:

Average acceleration = (21.67 m/s - 0 m/s) / 2.31 s ≈ 9.39 m/s²

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Answer:

Friction is the resistive force. when a driver applies brakes, the wheels stop rotating and there is friction between the tyres and the rough surface of the road. (but if you ask why it moves 3.5 m after braking, that is due to the intertia of the moving car)

Answer:

The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. When an object is close to the surface of the Earth, when the gravitational acceleration can be assumed to remain constant at roughly 9.8 m/s2, gravitational potential energy is most frequently used.

Explanation:

Answer:

Object C has the most potential energy.

Between A and B, we do not know which has more potential energy.

Explanation:

We know the object with the most potential energy and this is the object at C.

Potential energy is the energy due to the position of a body above the ground surface.

The higher a body is above ground, the more its potential energy.

 Potential energy  = mass x acceleration due to gravity x height

So;

 Object C has the most potential energy.

Between A and B, we do not know which has more potential energy.

This is because, the height and mass of the objects are not quantified using numbers.

Potential energy is a function of mass and height and acceleration due to gravity but acceleration due gravity is a constant.

Answer:

Answer: potassium (K) germanium (Ge) selenium (Se)

Explanation:

I just took the test, the farther to the right on the periodic table you go the less conductive it gets.

Answer:

Answer: potassium (K) germanium (Ge) selenium (Se)

Explanation:

The most conductive to least conductive is from left to right

Answer Expert Verified

Hello here is your answer and also please mark me as brainlest

Since one revolution around a circle is 2 pi radian; hence 1 rpm equals 2 pi radians per minute. And because a minute has 60 seconds, 1 rpm equals 1/60 revolution per second. Therefore, we have 2 pie/60 * 15.3 = 0.2513 rps. The linear velocity v = wr where w is the angular velocity in rad/s and r is the distance. So we have 0.2513 * 10.0 = 2.513 rad/s The centripetal acceleration is given by a = w^2 r = (2.513)^2 * 10 = 63.15 rad/s2 The centripetal force F = mass * centripetal acc = 75 * 63.15 = 4736.25 N The torque = centripetal force * distance = 4736 * 63.15 = 299078.4 Nm Two forces acts on the astronaut. The normal force and acceleration due to gravity.

I hope this help you

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Rotational kinematics and Newton's second law allow to find the results for the astronaut's movement in the centrifuge are:

       a) The angular velocity is: w = 1.927 rad / s

       b) The linear velocity is: v = 23.1 m / s

       c) The centripetal acceleration is: a = 6.417 10³ m / s²

       d) The centripetal acceleration is: a = 6.548 10² g

       e) The centripetal force F = 5.49 10⁵ N

given parameters

To find

    a) angular velocity

    b) linear velocity

    c) centripetal acceleration

    d) acceleration in units of gravity (g)

    e) the centripetal force

The angular velocity is defined as the rotated angle in the unit of time.

         \(w = \frac{\Delta \theta}{t}\)  

Angular and linear variables are related.

         v = w r

Where w is the angular velocity, θ  is the angle, t the time, v the lienal velocity and R the radius of the cetnrifuga

Let's answer the questions:

a) The angular velocity of the centrifuge and the astronaut are equal

         w = 1.927 rad / s

b) Linear velocity

         v = 1.927 12.0

         v = 23.1 m / s

c) Centripetal acceleration has the formula:

          a = \(\frac{v^2}{R}\)  

          a = \(\frac{23.1^2}{12.0}\)  

          a = 6.417 10³ m / s²

d) The value of this eceleration as a function of gravity

          \(\frac{a}{g}\)  = 6.417 10³ / 9.8

          \(\frac{a}{g}\)  = 6.548 10²

          a = 6.548 10² g

e) The centripetal force

           F = ma

           F = 85.5 6.417 10³

           F = 5.49 10⁵ N

In conclusion, using rotational kinematics and Newton's second law we can find the results for the movement of the astronaut in the centrifuge are:

       a) The angular velocity is: w = 1.927 rad / s

       b) The linear velocity is: v = 23.1 m / s

       c) The centripetal acceleration is: a = 6.417 10³ m / s²

       d) The centripetal acceleration is: a = 6.548 10² g

       e) The centripetal force F = 5.49 10⁵ N

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Answer:

The density of plastic is equal to 0.6 g/mL.

Explanation:

Given that,

The mass of piece of plastic, m = 15 g

It is placed in a graduated cylinder. The water  level in the graduated cylinder rises from  30 mL to 55 mL when the plastic is added.

We need to find the density of plastic.

Rise in volume = 55 mL - 30 mL

= 25 mL

The density of an object is given by :

\(d=\dfrac{m}{V}\\\\d=\dfrac{15\ g}{25\ mL}\\\\d=0.6\ g/mL\)

So, the density of plastic is equal to 0.6 g/mL.

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer:

C) The book's inertia carried it forward.

When the bus stops suddenly, the book tends to remain in motion due to its inertia. The book was at rest on the seat of the bus, and when the bus stopped suddenly, the book continued moving forward with the same speed and direction it had before the bus stopped. As a result, the book slid off the seat and onto the floor.

Answer:

the correct answer is B

Explanation:

The quantum numbers are the constants obtained when solving the Schrodinger equation, the first quantum number or principal quantum number (n), can take values ​​from zero to infinity.

This quantum number is placed as a coefficient in the quantum distribution.

In this case for phosphorus, the number is n = 3

the correct answer is B