11.A person walks 2 miles and stops to rest. She continues in the same direction
for another 2 miles.
a. What is her distance?
b. What is her displacement?

CR​ < CY​ < CB​

The factors which affect the critical angle are

(a) The colour (or wavelength) of light

(b) The temperature

(i) Effect of colour of light: The critical angle for a pair of media is less for the violet light and more for the red light. Thus the critical angle increases with the increase in wavelength of light.

(ii) Effect of temperature: The critical angle increases with increase in temperature because on increasing temperature of medium, its refractive index decreases.

According to the question,

μ 1​ sinCR​ =1

μ 2​ sinCY =1

μ 3​ sinCB​ =1

μ 1​ > μ 2​  and μ 2​ > μ 3

⟹μ 1​ > μ 2​ > μ 3

CR​ < CY​ < CB​

Thus,

The critical angle increases with the increase in wavelength of light.

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Answer:

It depends on 2 factors

the nature of the materials

the normal force.

Explanation:

It depends on 2 factors

the nature of the materials that are in friction and the treatment that they have followed. This factor is expressed by a numerical value called the coefficient of friction or friction.

the force exerted by one body on the other, that is, the normal force.

Answer:

The work done on the hose by the time the hose reaches its relaxed length is 776.16 Joules

Explanation:

The given spring constant of the of the spring, k = 88.0 N/m

The length by which the hose is stretched, x = 4.20 m

For the hose that obeys Hooke's law, and the principle of conservation of energy, the work done by the force from the hose is equal to the potential energy given to the hose

The elastic potential energy, P.E., of a compressed spring is given as follows;

P.E. = 1/2·k·x²

∴ The potential energy given to hose, P.E. = 1/2 × 88.0 N/m × (4.20 m)²

1/2 × 88.0 N/m × (4.20 m)² = 776.16 J

The work done on the hose = The potential energy given to hose, P.E. = 776.16 J

We are unable to directly determine the work performed by the engine because the distance over which the force acts is unknown.

This indicates that the effort expended to increase the car's speed will be equivalent to the change in kinetic energy of the vehicle. Thus, 30 kJ of effort must be performed.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea.

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The strong man accelerates the boulder of mass 264 kg at 4.1 m / s² if he uses a force of 2452 N.

W = m g

W = Weight

m = Mass

g = Acceleration due to gravity

m = 264 kg

g = 9.8 m / s²

W = 264 * 9.8

W = 2587.2 N

F = 2452 N

W = Normal force, N = 2587.2 N

\(f_{k}\) = μ N

\(f_{k}\) = Kinetic frictional force

μ = Co-efficient of kinetic friction = 0.53

\(f_{k}\) = 0.53 * 2587.2

\(f_{k}\) = 1371.22 N

∑ \(F_{x}\) = m a

F - \(f_{k}\) = m a

2452 - 1371.22 = 264 * a

a = 1080.78 / 264

a = 4.1 m / s²

Therefore, the strong man accelerates the boulder at 4.1 m / s²

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Answer:

the keys will make it back to John.

Explanation:

In order to find out if the keys will reach John or not, we can use the formula of projectile motion to find the maximum height reached by the keys:

H = V²Sin²θ/2g

where,

V = Launch Speed = 18 m/s

θ = Launch Angle = 40°

g = 9.8 m/s²

Therefore,

H = (18 m/s)²[Sin 40°]²/(2)(9.8 m/s²)

H = 6.83 m

Hence, the maximum height that can be reached by the projectile or the keys is greater than the height of John's Balcony(5.33 m).

Therefore, the keys will make it back to John.

Yes, Key will surely reach back to John.

Given that;

Velocity v = 18 m/s

θ Angle = 40°

g = 9.8 m/s²

Computation:

By using maximum height formula

H = [v²][sin²θ]/2g

H = (18)²[Sin 40°]²/[(2)(9.8)]  

H = 6.83 m

6.83 meter is more then 5.33 meter,

So,

Key will surely reach back to John.

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Answer:

✓ Ion

Explanation:

Which term BEST describes the form of beryllium shown? Protons=4 Neutrons=5 Electrons=2

✓ Ion

Answer:

B

Explanation:

Explanation:

because the acceleration is negative, this indicates a deceleration (or slowing down) . Hence we can say that:

The car is decelerating (slowing down), i.e its velocity is decreasing, at a constant rate of 5m/s².

Explanation:

If acceleration points in the same direction as the velocity, the object will be speeding up. The acceleration points in the same direction as the velocity if the car is speeding up, and in the opposite direction if the car is slowing down.

The psychological school of thought called functionalism emphasized how mental processes help people adapt to their environment.

Functionalism was a prominent psychological school of thought that emerged in the late 19th and early 20th centuries. It aimed to understand the mind by focusing on its purpose and function rather than its structure. Functionalists believed that mental processes, such as perception, memory, and thinking, served adaptive functions that allowed individuals to successfully navigate and adapt to their environment. They argued that the mind should be studied in terms of how it helps individuals survive, thrive, and achieve their goals in the real world. Functionalism was influenced by evolutionary theory, which emphasized the adaptive nature of behaviors and mental processes. It sought to explain how mental processes evolved and how they contributed to an individual's ability to adapt to changing environmental demands. By understanding the functions of different mental processes, functionalists aimed to gain insights into human behavior and improve practical applications in areas such as education, industry, and therapy.

In summary, functionalism, as a psychological school of thought, placed a strong emphasis on how mental processes facilitate individuals' adaptation to their environment. It focused on understanding the purpose and function of these processes and how they contributed to an individual's ability to survive and thrive in the real world.

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The calculated value of kinetic energy doesn’t match the measured kinetic energy of the rock because the calculated value of kinetic energy is based on theoretical calculations, whereas the measured value is based on practical observations.

Kinetic energy is the energy possessed by an object in motion. It depends on the mass and velocity of the object. The formula for kinetic energy is given by KE = 1/2 mv², where m is the mass of the object and v is its velocity.The calculated value of kinetic energy can be found by using this formula. However, this value is based on theoretical calculations, assuming that the object is moving in a vacuum with no resistance from air or other factors. In reality, there are several factors that can affect the measured value of kinetic energy. These factors include:Friction: The rock may encounter friction as it moves, which can reduce its velocity and therefore its kinetic energy.

Sound: When the rock strikes the ground, some of its kinetic energy may be converted into sound energy and lost.So, even though the calculated value of kinetic energy may be accurate in theory, the measured value may be different due to the influence of several real-world factors.This difference between the calculated and measured values of kinetic energy highlights the importance of conducting experiments and making practical observations.

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The minimum number of overload units for a three-phase AC motor's protection is THREE (3). It is a polyphase motor.

Three-phase motors are polyphase motors, which can be induction motors or synchronous motors.

A three-phase motor is organized to run on three-phase alternating current (AC) electrical power, which is required for diverse industrial devices that use a lot of electrical energy.

These motors (three-phase motor) are composed of a stator (the outer part), a rotor (rotating part), and the enclosure (the external skeleton).

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Answer: D. Venus giving life to Pygmalion's statue

Explanation: Hi! I got it right on Edmentum. Hope this helps! <3

The reason why double stars have similar spectral types is because they are typically located close to each other and have a similar age and composition. Double stars are also gravitationally bound to each other, which means they have similar motion and orbits and therefore have similar spectral types.

Double stars are formed when two stars come close enough together to form a binary system, which means that the stars will revolve around each other in an orbit, usually around a common center of gravity. This gravitational pull causes the stars to both to have a similar age and composition, since they were formed from the same material.

This, in turn, leads to the stars having similar spectral types, which can be identified by their color and the types of light they emit. Furthermore, double stars typically have a common center of mass, which allows them to have similar motions and orbits.

This again leads to the stars having similar spectral types, since they are subject to similar forces and temperatures. As a result, double stars can often be identified by their similar spectral types, which can be determined by looking at their color and the types of light they emit.

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The range of possible frequencies of radiation is called the electromagnetic spectrum.

The electromagnetic spectrum is the variety of all possible frequencies of electromagnetic radiation. This consists of radio waves, microwaves, infrared radiation, seen mild, ultraviolet radiation, X-rays, and gamma rays. The spectrum is classed based totally at the frequency and wavelength of the radiation, with each sort of radiation occupying a specific area of the spectrum. The class is primarily based on their capability to tour thru one of a kind substances and their interactions with matter. The distinct areas of the spectrum have an expansion of realistic applications, from conversation technology to medical imaging.

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Answer:

some times the glass breaks

Explanation:

If a horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end and a person weighing 500 N is sitting on the board, the tension in the right chain is 250 N then the tension in the left chain is 375 N.

A horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end. A person weighing 500 N is sitting on the board.

The tension in the right chain is 250 N. What is the tension in the left chain?

The tension in the left chain is 375 N.

How to find the tension in the left chain?

Here, the weight of the board is W1= 125 N

Weight of the person sitting on the board is W2 = 500 N

Length of the board is L = 4 m

Tension in the right chain is T1 = 250 N

Tension in the left chain is T2

The sum of the tension in both chains will be equal to the weight of the board and the person sitting on the board. i.e., T1 + T2 = W1 + W2.

T2 + 250 N = 125 N + 500 N

T2 = 625 N - 250 N

T2 = 375 N

Therefore, the tension in the left chain is 375 N.

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to get weight multiply Mass by 9.8

weight =9.8x15=147N

The potential energy (PE) of the 79 kg cinder block sitting on a 20 m high platform is 15,444 J (joules).

To calculate the potential energy of the cinder block, you can use the formula PE = mgh, where "m" is the mass, "g" is the acceleration due to gravity (9.8 m/s²), and "h" is the height.

First, find the product of the mass (79 kg) and the acceleration due to gravity (9.8 m/s²): 79 kg * 9.8 m/s² = 774.2 kg*m/s² (also known as newtons, N).

Next, multiply this value by the height (20 m): 774.2 N * 20 m = 15,444 J. Therefore, the potential energy of the cinder block is 15,444 J.

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Answer:

You could do some research on them or you could also find books about them

Explanation:I hope you have/had an amazing day!!

The force of friction between the losing player’s feet and the grass is 692 N.

The force of friction between the losing player’s feet and the grass is calculated by applying Newton's second law of motion as shown below.

F(net) = ma

where;

F - Ff = ma

where;

800 - Ff = 90 x 1.2

800 - Ff = 108

Ff = 800 - 108

Ff = 692 N

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Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".

The value of the capacitance reactance being used when the power factor given is 0.95 is 3.0424349222966542 ohms.

The power factor is a measure of how efficiently electrical power is being used.

A power factor of 1 means that all of the electrical power is being used for useful work, while a power factor of less than 1 means that some of the electrical power is being wasted.

A capacitor can be used to improve the power factor of an AC circuit by providing a reactive load that cancels out the inductive load of the circuit. The value of the capacitance reactance needed to improve the power factor to 0.95 can be calculated using the following formula:

XC = 1 / tan(acos(PF))

where PF is the power factor.

In this case, the power factor is 0.95, so the capacitance reactance is:

XC = 1 / tan(acos(0.95)) = 3.0424349222966542 ohms

The value of the capacitance reactance being used when the power factor given is 0.95 is 3.0424349222966542 ohms. This can be calculated using the formula given above.

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Answer:

1.6 ml

Explanation:

Answer: D) zero loss of kinetic energy

Explanation:

Answer:

For overthrowing the Nepalese monarchy and establishing people's republic