You decide to go skiing but fall over. As you are attempting to get back up, you see a child start to head down the hill straight for you. If the coefficient of friction between the child and the snow is assumed to be 0, and the child appears to be 20 m above you when they start down the mountain, and the incline of the mountain is 31 degrees, how long do you have to get up and out of the way before you and the child collide?

Answer:

The  frequencies are  \(f_n = n (0.875 )\)

Explanation:

From the question we are told that

   The speed of the wave is  \(v = 0.700 \ m/s\)

   The  length of vibrating  clothesline is  \(L = 40.0 \ cm = 0.4 \ m\)

Generally the fundamental frequency is  mathematically represented as

        \(f = \frac{v}{2 L }\)

=>     \(f = \frac{ 0.700 }{2 * 0.4 }\)

=>     \(f = 0.875 \ Hz\)

Now  this other frequencies of vibration experience by the clotheslines are know as harmonics and they are obtained by integer multiple of  the fundamental frequency

So  

   The  frequencies are mathematically represented as

       \(f_n = n * f\)

=>     \(f_n = n (0.875 )\)

Where  n  =  1, 2, 3 ....

The recurrent transition of something between two locations or states is referred to as oscillation.

Thus, A sine wave—a wave with everlasting motion like the side-to-side swing of a pendulum or the up-and-down action of a spring with a weight—is an example of an oscillation.

An oscillation is a periodic motion that repeats itself in a regular cycle. Around an equilibrium point or mean value, an oscillating movement takes place. Periodic motion is another name for it.

An oscillation is a continuous movement that occurs throughout time, whether it is going up and down or side to side.

Thus, The recurrent transition of something between two locations or states is referred to as oscillation.

Learn more about Oscillation, refer to the link:

https://brainly.com/question/15360932

#SPJ1

Since, density of the bracelet is not equal to the density of gold, then, the bracelet is not pure gold.

To know if the bracelet is pure gold, we calculate the density of the bracelet and compare it to the density of pure gold (19.3 g/cm³).

That is, for the bracelet to pure gold,

Density of bracelet ≈ 19.3 g/cm³

Density can be defined as the ratio of the mass and the volume of a substance.

The formula of Density is give as

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Hence, since the density of the bracelet is not equal to the density of gold, then, the bracelet is not pure gold.

Learn more about density here: https://brainly.com/question/1354972

#SPJ1

Answer:

50 miles per hour

Explanation:

125/2.5 which equals to 50

Answer:

50 miles per hour

Explanation:

125 divided by 2.5 = 50

Answer:

Decreases

Explanation:

I think this is right tell me if it's wrong.

Answer:

Increases.

Explanation:

The density of the second medium increases, the angle of refraction also increases because of higher density of the medium. In more denser medium, there is more resistance for the light ray so it bends more as compared to less denser medium in which less bending of light ray occur. The angle of refraction increases when the density of medium is more than the previous medium so we can say that the angle of refraction increases due to increase in density of another medium.

Option B is correct.Increasing the distance between the particles by a factor of 3 decrease the force between two charged particles by a factor of 9.

The electric force between the two charges is directly proportional to the product of the charge and inversely proportional to the square of the distance between them.

The electric force is found as;

\(\rm F = \frac{K q_1q_2}{r^2}\)

The electric force between the two charges is directly proportional to the product of the charge.

The electric force is inversely proportional to the square of the distance between them.

Increasing the distance between the particles by a factor of 3 decreases the force between two charged particles by a factor of 9

Hence, option B is correct.

To learn more about the electric force, refer to the link;

https://brainly.com/question/1076352

#SPJ2

When a rectangular loop of wire has area A it is placed perpendicular to a uniform magnetic field B and spun around one of its sides at frequency f the maximum induced emf is  2πBAf

A magnetic field could be understood as an area around a magnet, magnetic material, or an electric charge in which magnetic force is exerted.

The maximum induced emf is 2πBAf when a rectangular wire loop of area A is spun around one of its sides at frequency f, perpendicular to a uniform magnetic field B.

therefore the correct answer is option C

Learn more about the magnetic fields from here

brainly.com/question/23096032

#SPJ1

Your question seems incomplete, the complete question is as follows

A rectangular loop of wire has area A. It is placed perpendicular to a uniform magnetic field B and then spun around one of its sides at frequency f. The maximum induced emf is:

A. BAf

B. 4πBAf

C. 2πBAf

D. 2BAf

Over the first 16.4 m, the person performs

W = (60.0 N) (16.4 m) = 984 J

of work.

Over the remaining 6.88 m, they perform a varying amount of work according to

F(x) ≈ 60.0 N + (-8.72 N/m) x

where x is in meters. (-8.72 is the slope of the line segment connecting the points (0, 60.0) and (6.88, 0).) The work done over this interval can be obtained by integrating F(x) over the interval [0, 6.88 m] :

W = ∫₀⁶˙⁸⁸ F(x) dx ≈ 206.4 J

(Alternatively, you can plot F(x) and see that it's a triangle with base 6.88 m and height 60.0 N, so the work done is the same, 1/2 (6.88 m) (60.0 N) = 206.4 J.)

So the total work performed by the person on the box is

984 J + 206.4 J = 1190.4 J ≈ 1190 J

Answer:

If the thrust is increased, the aircraft accelerates and the velocity increases. This is the second part sited in Newton's first law; a net external force changes the velocity of the object. The drag of the aircraft depends on the square of the velocity. So the drag increases with increased velocity.

Answer:

a) the wavelength that the light emits is 6.1875 × 10⁻⁷ m

b) the distance between the two n = 1 dark fringes is 5.5 × 10⁻³ m

Explanation:

Given the data in the question;

separation  between two slits  d = 0.36 mm = 0.00036 m

Separation between two adjacent fringes β = 5.5 mm = 0.0055 m

Distance of screen from slits D = 1.6 m

n = 2

a) the wavelength the light emits;

Using the formula;

β = (nD/d)λ

To find wavelength, we make λ the subject of formula;

βd = nDλ

λ = βd / nD

so we substitute

λ = ( 0.0055 m × 0.00036 m ) / ( 2 × 1.6 m )

λ = 0.00000198 / 3.2

λ = 6.1875 × 10⁻⁷ m

Therefore, the wavelength that the light emits is 6.1875 × 10⁻⁷ m

b) the distance between the two n = 1 dark fringes;

To find the distance between the two n = 1 dark fringes, we use the following formula;

y\(_m\) = 2nλD / d

given that n = 1, we substitute

y\(_m\) = ( 2 × 1 × ( 6.1875 × 10⁻⁷ m ) × 1.6 m ) / 0.00036 m

y\(_m\) = 0.00000198 / 0.00036

y\(_m\) = 0.0055 m

y\(_m\) = 5.5 × 10⁻³ m

Therefore, the distance between the two n = 1 dark fringes is 5.5 × 10⁻³ m

Answer:  1. The function of a lightning rod is to protect buildings, structures, and people from lightning strikes by providing a path of least resistance for the electrical current to follow, directing it safely into the ground instead of through the structure or people.

2. Charge build-up is reduced on airplanes through various methods, such as using conductive materials in the airplane's structure, applying anti-static coatings on the airplane's surface, and installing static discharge wicks or similar devices on the airplane's trailing edges, which provide a way for any accumulated charge to safely dissipate into the air.

3. A ground strap is a necessary safety feature when transferring fuel because it provides an electrical connection between the fuel container and the receiving container, allowing any static charge to safely dissipate into the ground. Without a ground strap, the static charge could build up and potentially ignite the fuel.

4. Three different methods for reducing charge build-up in clothes dryers are: (1) using dryer sheets or fabric softeners, which can help neutralize static charges on the clothes, (2) adding a damp cloth to the dryer, which can help dissipate static charges, and (3) using metal dryer balls, which can physically separate clothes and prevent them from rubbing against each other and creating static charges.

5. Four different methods for reducing charge build-up in a computer room with a carpet are: (1) using conductive flooring or carpet tiles that can help dissipate static charges, (2) using anti-static mats or wrist straps for personnel who work in the room, (3) using air ionizers or humidifiers, which can help neutralize static charges in the air, and (4) grounding all equipment and devices in the room to prevent the buildup of static charges.

Explanation:

I hope this helps!

a.i) The work done when the body is displaced from s=0 to s = 0.4 m is 0.8 J.

(a.ii) The work done when the body is displaced from s=0 to s = 0.8 m is 1.2 J.

(b.i) The final velocity of the body when the displacement is 0.4 m is 3.46 m/s.

(b.ii) The final velocity of the body when the displacement is 0.8 m is 4 m/s.

The work done on an object is the product of force and displacement of the object.

The work done between 0 to 0.4 m is determined from the area of the triangle formed.

W = ¹/₂(0.4 m - 0 m) x ( 4 N )

W = ¹/₂(0.4 m) x ( 4 N )

W = 0.8 J

The work done from s=0 to s =0.8 m,

W = ( Area of 0 to 0.4 m) + ( Area of 0.4 m to 0.8 m)

W =  0.8 J  +   ¹/₂(0.8 m - 0.4 m) x ( 2 N )

W = 0.8J  +  ¹/₂(0.4 m) x ( 2 N )

W = 0.8J + 0.4 J

W = 1.2 J

The final velocity of the body is calculated by applying work energy principle.

change in kinetic energy of the body = work done by the body

¹/₂m(v₂² - v₁²) = W

Where;

when, s = 0.4 m, the final velocity is calculated as;

¹/₂m(v₂² - v₁²) = 0.8 J

¹/₂(0.2)(v₂² - 2²) = 0.8

0.1(v₂² - 2²) = 0.8

v₂² - 2² =  0.8 / 0.1

v₂² - 2² = 8

v₂² = 8 + 4

v₂² = 12

v₂ = √12

v₂ = 3.46 m/s

when s = 0.8 m, the final velocity is calculated as;

¹/₂(0.2)(v₂² - 2²) = 1.2 J

0.1(v₂² - 2²) = 1.2

v₂² - 2² =  1.2 / 0.1

v₂² - 2² = 12

v₂² = 12 + 4

v₂² = 16

v₂ = √16

v₂ = 4 m/s

Learn more about work done here: brainly.com/question/8119756

#SPJ1

1. The electron experiences acceleration and moves independently in the y-direction.

2. The y-component of the electron's displacement after 2.40 μs in the electric field is -8.11 μm.

3.  The x-component of displacement remains zero.

To calculate the y-component and x-component of the electron's displacement, we need to consider the motion of the electron in the electric field. Let's break it down step by step:

1. Acceleration of the Electron:

The electric field causes a force on the electron given by the equation: F = qE, where F is the force, q is the charge of the electron, and E is the electric field.

Since the charge of an electron is -1.6 × \(10^-^1^9\) C, and the electric field is 201 N/C, we can calculate the force:

F = (-1.6 × \(10^-^1^9\)C) * (201 N/C)

  = -3.216 × \(10^-^1^7\) N

Using Newton's second law, F = ma, we can find the acceleration (a) of the electron:

a = F / m

  = (-3.216 × \(10^-^1^7\) N) / (9.109 ×\(10^-^3^1\) kg)

  = -3.530 × \(10^1^3 m/s^2\)

2. Displacement in the y-direction:

Since no other forces act on the electron, its motion in the y-direction is independent of the electric field. The equation for displacement (y) under constant acceleration is:

y = (1/2) * a *\(t^2\)

Substituting the values, where the time (t) is 2.40 μs (2.40 ×\(10^-^6\) s), we can calculate the y-component of displacement:

y = (1/2) * (-3.530 ×\(10^1^3 m/s^2\)) * (2.40 ×\(10^-^6 s)^2\)

  = -8.11 μm

Therefore, the y-component of the electron's displacement 2.40 μs after entering the electric-field region is -8.11 μm.

3. Displacement in the x-direction:

Since the electron's velocity is only in the y-direction initially, the x-component of the displacement remains zero. Without any forces acting in the x-direction, the electron continues to move in the y-direction without changing its x-position.

Hence, the x-component of the electron's displacement 2.40 μs after entering the electric-field region is 0 meters.

Please note that the calculations provided are based on the given values and the provided formulas for displacement and acceleration.

For more such information on: acceleration

https://brainly.com/question/460763

#SPJ8

Answer:

Magnetic Field

Explanation:

The area around a magnet containing all of magnetic Lines of force is called the magnetic field.

Area is 60 * 60 which is 3600 square unit.

The measurement that expresses the size of a region on a plane or curved surface is called area. Surface area refers to the area of an open surface or the boundary of a three-dimensional object, whereas the area of a plane region or plane area refers to the area of a shape or planar lamina.

Area = length*breadth = 60*60 = 3600 square unit.

Area is 60 * 60 which is 3600 square unit.

To learn more about area refer to the link:

brainly.com/question/27683633

#SPJ1

Answer:

it is double the temperature change of iron

To calculate the speed of the electrons in terms of the speed of light, we can use the relativistic kinetic energy equation:

KE = (γ - 1)mc^2

where KE is the kinetic energy of the electron, m is its rest mass, c is the speed of light, and γ is the Lorentz factor:

γ = 1/√(1 - v^2/c^2)

where v is the velocity of the electron.

To find v, we can use the relationship between kinetic energy and voltage:

KE = qV

where q is the charge of the electron and V is the voltage difference.

Substituting qV for KE, we get:

qV = (γ - 1)mc^2

Rearranging, we get:

γ = 1 + qV/mc^2

Substituting q = -1.6 x 10^-19 C (the charge of the electron), V = 295 kV, and m = 9.11 x 10^-31 kg (the rest mass of the electron), we get:

γ = 1 + (-1.6 x 10^-19 C)(295 x 10^3 V)/(9.11 x 10^-31 kg)(3 x 10^8 m/s)^2

γ = 1.344

Finally, we can calculate the speed of the electrons in terms of the speed of light:

γ = 1/√(1 - v^2/c^2)

1.344 = 1/√(1 - v^2/(3 x 10^8 m/s)^2)

Squaring both sides and solving for v, we get:

v = 0.9964c

Therefore, the speed of the electrons is 0.9964 times the speed of light

The 10/90 principle can be a powerful tool for taking control of your situation and improving your life. By taking responsibility for what you can change and focusing on your reaction to the situation, you can make positive changes in your life and become the master of your own destiny.

The 10/90 principle refers to the idea that life is made up of 10% of what happens to you and 90% of how you respond to it. In other words, you may not be able to control what happens to you, but you can control your reaction to it. By taking responsibility for what you can change rather than being a victim of what you cannot change, you can take control of your situation and improve your life.One example of a situation where the 10/90 principle could be applied is losing a job. Losing a job can be a devastating experience, and it can be easy to feel like a victim in this situation. However, by applying the 10/90 principle, you can take control of your situation and make positive changes in your life.The first step in applying the 10/90 principle in this situation would be to take responsibility for what you can change. This could mean updating your resume, networking with others in your field, and applying for new jobs. By taking action and doing what you can to find a new job, you are taking control of your situation and improving your chances of finding a new job.
The second step would be to focus on your reaction to the situation. Instead of dwelling on the negative aspects of losing your job, try to focus on the positive aspects. This could mean using the extra time to pursue a new hobby or spend more time with family and friends. By focusing on the positive aspects of the situation, you are taking control of your reaction and improving your overall well-being.
for such more questions on  principle

https://brainly.com/question/26117248

#SPJ8

The beat frequency produced by the two standing waves is 13 Hz.

The wavelength of the shorter string is calculated as follows;

\(L = \frac{\lambda}{2} \\\\\lambda = 2L\\\\\lambda = \frac{v}{f} \\\\\lambda = \frac{41.9}{225} \\\\\lambda = 0.186 \ m\\\\\lambda = 18.6 \ cm\\\\L= \frac{\lambda }{2} \\\\L = \frac{18.6 \ cm}{2} = 9.3\ cm\)

\(L_2 = 0.58 \ cm \ + 9.3 \ cm\\\\L_2 = 9.88 \ cm \\\\\lambda _2 = 2L_2\\\\\lambda _2 = 2(9.88 \ cm)\\\\\lambda_2 = 19.76 \ cm = 0.1976 \ m\)

The frequency of the longer string is calculated as follows;

\(v_1 = v_2\\\\f_2 = \frac{v_2}{\lambda_2} \\\\f_2 = \frac{41.9}{0.1976} \\\\f_2 = 212 \ Hz\)

The beat frequency produced by the two standing waves is calculated as follows;

\(F_b = 225 \ Hz \ - \ 212 \ Hz\\\\F_b = 13 \ Hz\)

Learn more about beat frequency here: https://brainly.com/question/3086912

According to the utilitarian ethical theory, morality is decided by emphasising results.

This kind of consequentialism exists here. According to utilitarianism, a decision should be made if it would result in the greatest amount of benefit for the largest number of people. The utilitarian perspective holds that you should select the ice cream flavour that would make you feel the happiest if you are making a decision for yourself.

A variation of consequentialism known as utilitarianism holds that actions' results are the only criteria for what is right and bad. Utilitarianism takes into account the interests of every sentient being equally, unlike other consequentialist ideologies like egoism and altruism.

To learn more about utilitarianism :

https://brainly.com/question/26034066

#SPJ4

Answer:

Explanation:

A) The output force required to lift a 15 kg object would be equal to the weight of the object, which is given by:

Output force = Weight of object = m * g

where m is the mass of the object and g is the acceleration due to gravity. Assuming that g is equal to 9.81 m/s^2, we have:

Output force = 15 kg * 9.81 m/s^2 = 147.15 N

Therefore, the output force required to lift a 15 kg object would be 147.15 N.

B) In this case, the input force is the force that you are pushing down with the lever, which is given as 20 N.

C) The mechanical advantage of the ramp is given by the ratio of the output force to the input force. In this case, the output force is the weight of the object (40 N) and the input force is the force that you are pushing with (10 N). Therefore, the mechanical advantage of the ramp would be:

Mechanical advantage = Output force / Input force = 40 N / 10 N = 4

So, the ramp multiplies your force by a factor of 4.

Note that in all of these calculations, we have assumed that the system is ideal and that there are no losses due to friction or other factors. In practice, these losses will reduce the mechanical advantage of the system and make it more difficult to lift or move objects.

The gravitational field on the surface of the planet is approximately 9.81 m/s^2

Gravitational field can be defined as the force field that exists in the space around every mass or group of masses.

The gravitational field on the surface of a planet can be calculated using Newton's law of gravitation:

G * m_planet / r^2

Where:

G = 6.67 x 10^-11 Nm^2/kg^2 is the gravitational constant

m_planet = 8.5 x 10^26 kg is the mass of the planet

r = 3.5 x 10^4 km is the radius of the planet (converted to meters)

First, let's convert the radius to meters:

3.5 x 10^4 km = 3.5 x 10^4 x 10^3 m = 3.5 x 10^7 m

Next, let's plug in the values and simplify the expression:

g = G * m_planet / r^2

g = (6.67 x 10^-11 Nm^2/kg^2) * (8.5 x 10^26 kg) / (3.5 x 10^7 m)^2

g = (6.67 x 10^-11 Nm^2/kg^2) * (8.5 x 10^26 kg) / (1.225 x 10^15 m^2)

g = 9.81 m/s^2

Therefore, The gravitational field on the surface of the planet is approximately 9.81 m/s^2

Learn more about gravitational field here: brainly.com/question/940770

#SPJ1

Answer:

About 46 billion light years Because space expands so what we didn’t see before is what we could see now. An example could be how everyone thought Pluto was a regular sized planet but once you get a look at the bigger picture and compare it to other thing in space we now know Pluto is a dwarf planet.

The EMF induced in a single wire loop with an area of 0.0940 m² is in a uniform magnetic field which has an initial value of 3.80 T, is perpendicular to the plane of the loop, and decreases at a constant rate of 0.190 T = 0.34 V. And the current induced in the loop = 0.57 A.

Induced electromotive force or induced emf is the potential difference at the ends of the coil which will produce an induced electric current.

An induced electric current appears as long as there is a change in magnetic flux.

The equation is:

ε = d∅/dt

We have,

The area of the loop = 0.0940m²

The change in magnetic field with time = (3.80 T - 0.190 T) = 3.61 T

So, the EMF induced:

ε = d∅/dt

=  {(0.0940m²) (3.61)} / 1

= 0.34 V

And the current induced in the loop =

I = ε/R

= 0.34 V / 0.600 Ω

= 0.57 A

The question is incomplete, it should be:

A single loop of wire with an area of 0.0900m2 is in a uniform magnetic field that has an initial value of 3.8 T, is perpendicular to the plane of the loop, and is decreasing at a constant rate of 0.190 T/s.

(a) What emf is induced in this loop?

(b) If the loop has a resistance of 0.600O, find the current induced in the loop.

Learn more about EMF induced here: https://brainly.com/question/17329842

#SPJ4

Answer:

from my side the will be b only the mass of the planet thank you

Answer:

D

Explanation:

W=mg

g=GM/r²(G=Gravitational constant, M=mass of earth, r=Radius of earth)

>>W=m(GM/r²)

W is directly proportional to mass of earth and mass of your body

Answer:

A. Net amount of heat radiated = 109.2W

B. Person's basal energy = 136.5

Explanation:

Part A:

Area of person, A = 1.90 m^2

Temperature of person , T = 31 C

T = 304 K

Temperature of surroundings , To = 19 C

To = 282 K

Now, net amount of heat radiated = e*A*sigma *(T^4 - To^4)

Net amount of heat radiated = 1 * 1.8 * 5.6703 *10^-8 *(304^4 - 294^4)

Net amount of heat radiated = 109.2 W

The net amount of heat radiated is 109.2 W

Part B:

Person's basal energy = net amount of heat radiated /(0.80)

Person's basal energy = 109.2/0.80

Person's basal energy = 136.5 W

Person's basal energy is 136.5 W

The net-work required to accelerate the car of mass 1200 kg is 840000 J.

Work can be deifned as the product of force and distance.

To calculate the amount of net-work required to accelerate 1200 kg car from 25 m/s to 45 m/s, we use the formula

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the net-work required is 840000 J.

Learn more about work here: https://brainly.com/question/25573309

#SPJ1