a girl pushes her little brother down a snowy hill on a sled and he rides quickly to the bottom of the hill

which one of Newton's Laws is this ​

Answer:

The correct option is;

Raymond: I think the skateboarder has the same total energy at all points on the ramp

Explanation:

The total energy, also known as the total mechanical energy, is the sum of the kinetic and potential energies of the skateboarder

Given that the potential energy is the energy gained due to elevation, the maximum potential energy is obtained at the top of the ramp, while the maximum kinetic energy, which is the energy due to motion, is at the bottom of the ramp where the skateboarder moves fastest.

However, by the energy conservation principle, the kinetic energy of he skateboarder comes from the conversion of the potential energy, such that the total energy is the same at any particular point on the ramp.

Answer:

Cycloheptatriene

Explanation:

Answer:

Cycloheptatriene or Toluene

Explanation:

I hope this helps!

Answer:

The 5-number summary is

1. Median = 0.93 W/kg

2. Lower quartile = 0.69 W/kg

3. Upper quartile = 1.16 W/kg

4. Minimum value = 0.54 W/kg

5. Maximum value = 1.42 W/kg

Explanation:

We are given the measured radiation absorption rates​ (in W/kg) corresponding to 11 cell phones.

1.16 0.85 0.69 0.75 0.95 0.93 1.18 1.17 1.42 0.54 0.57

What is 5-number summary?

A 5-number summary refers to a box plot that basically shows 5 statistical characteristics of a data set.

These statistical characteristics are:    

1. Median

2. Lower quartile

3. Upper quartile  

4. Minimum value  

5. Maximum value  

1. Median:

Arrange the data in ascending order

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

(n+1)/2 gives the median value of the data set.

(11 + 1)/2 = 6th position

Therefore, 0.93 W/kg is the median of the data set.

2. Lower quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The lower quartile is the median of the lower half of the data set.

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

The median is 6/2 = 3rd position

Therefore, the lower quartile of the data set is 0.69 W/kg

3. Upper quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The upper quartile is the median of the lower half of the data set.

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The median is 6/2 = 3rd position

Therefore, the upper quartile of the data set is 1.16 W/kg

4. Minimum value:

The minimum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the minimum value of the data set is 0.54 W/kg

5. Maximum value  

The maximum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the maximum value of the data set is 1.42 W/kg

The box plot is illustrated in the attached diagram.

The magnitude of  force between the two charges is 4.8 x 10^-2 N.

This can be calculated using Coulomb's law:

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

Plugging in the given values, we get:

F = (9.0 x 10^9 N m^2/C^2) * (2.0 x 10^-4 C) * (8.0 x 10^-4 C) / (0.30 m)^2

Simplifying the expression, we get:

F = 4.8 x 10^-2 N

Therefore, the magnitude of the force between the two charges is 4.8 x 10^-2 N.

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A weally works when you pull something and a axle is something that you can push

Explanation:

I hope this helps

Answer

as it is given that 1hp=746W

100W=?hp

746hp=100W   (to find the value of hp we divide 100 on both sides)

746/100=hp

hp=7.46

We agree from adita because Plastics are insulators while metals are effective heat energy conductors.

The majority of metals are thought to be effective carriers of electrical current. One of the more widely used materials for conductors is copper. Aluminum, silver, and gold are a few additional materials that are occasionally utilized as conductors.

Materials like wood, rubber, plastic, and glass make excellent insulators. They are employed to cover electricity-transporting devices, such as the wires' plastic coating, since they prevent the flow of electricity where it is not needed.

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Answer:

Sir Isaac Newton contributed significantly to the field of science over his lifetime. He invented calculus (opens in new tab) and provided a clear understanding of optics. But his most significant work had to do with forces, and specifically with the development of a universal law of gravitation and his laws of motion

Explanation:

A genius with dark secrets. Isaac Newton changed the way we understand the Universe. Revered in his own lifetime, he discovered the laws of gravity and motion and invented calculus. He helped to shape our rational world view.

Answer:

1.08 x 10⁷N

Explanation:

Given parameters:

Mass of freight train  = 270700kg

Acceleration = 40m/s²

Unknown:

Force acting on the train = ?

Solution:

From Newton's second law of motion, we know that:

       Force  = mass x acceleration

So;

        Force  = 270700 x 40   = 1.08 x 10⁷N

Answer: A) Had twice as much mass

Explanation:

Given that the force of gravity pulling down on school = 400,000 N

The force of force of gravity is the product of mass of the body and the acceleration due to gravity. The acceleration due to gravity is constant on the earth surface with a constant value of 9.8m/s²

Hence,

F = mg = 800N

F = force of gravity, m = mass of body, g =! acceleration due to gravity.

since g is constant, to have 2F, then mass has to be doubled, that is 2m(2 * mass)

Answer:

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets

Explanation:

The gauge pressure of the pipe is  2.234 ×10⁴  Pa, if the pipe is changed for another twice the area.

To find the gauge pressure the values given are,

speed of water = 2.5 m/s

Gauge pressure = 2×10⁴  Pa

Definition:

      Pressure can be defined as the total applied force per unit of area. The pressure depends both on externally applied force as well the area on which it is applied.

To find the gauge pressure first we have use continuity equation,

A ₁V₁ = A₂V₂

By the given condition: As the area is increased to twice the original area

A ₁V₁ = 2A₁V₂

A₁ gets cancelled on both the sides,

V₂ =V₁/2

    =2.5 /2

V₂=1.25 m/s

Then, substituting the values in Bernoulli's equation,

Equation is given as,

P₁ + 1/2 ρV₁² = P₂ + 1/2 ρV₂²

Taking 1/2 ρ as common,

P₂ =  2×10⁴ + 1/2 ×1000×(2.5² -1.25²)

    = 2×10⁴ + 2343.75

    =22343.75 Pa

    =2.234 ×10⁴ Pa

Thus, if the pipe is changed for another twice the area then the gauge pressure is 2.234 ×10⁴ Pa.

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Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)

initial speed = 6.7 m/s

final speed = 2.3 m/s

time = 2.2 seconds

acceleration = change in speed / time interval

                      = 2.3 - 6.7 / 2.2

                      = -2 \(m/s^{2}\)

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Answer:

sound waves are mechanical waves

Explanation:

Mechanical waves needs a media through which they can transmit, and media must have elasticity

Q3. By using Newton's Divided Difference interpolation, the value of y when x=3 can be determined.

Q4. Using Lagrange's Interpolation method, the value of y can be determined for x=13 from the given data.

Interpolation methods are used to estimate the value of a dependent variable (in this case, y) when the independent variable (x) falls between two known data points. Newton's Divided Difference interpolation and Lagrange's Interpolation method are two commonly used techniques for this purpose.

To find the value of y when x=3 using Newton's Divided Difference interpolation, we can use the given table of data points and interpolate a polynomial function that fits the data. The coefficients of this polynomial can be determined using the divided difference formula. By substituting x=3 into the interpolated polynomial, we can calculate the corresponding value of y.

using Lagrange's Interpolation method, we can also determine the value of y for x=13. This method involves constructing a polynomial function that passes through the given data points. By using the Lagrange interpolation formula, which is based on weighted averages, we can calculate the value of y for the desired x=13.

Interpolation methods are valuable tools in data analysis, curve fitting, and prediction. They allow us to estimate values within a range based on known data points. By utilizing these techniques, we can make informed predictions and fill in missing information between data points.

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Answer:

C

Explanation:

elements are classified as covalent, ionic, metallic

The ray that passes from one medium to another during refraction is called refracted ray.

The bending of light when it passes from one medium to another is called refraction. The ray transmitted into the new medium is called the refracted ray. The ray reflected from the surface of the new medium is called the reflected ray.

Formula to find refracted angle, also known as Snell's law:

n1 sin ∅1 = n2 sin ∅2, whereas,

n1 = incident index,

n2 = refracted index,

∅1 = incident angle,

∅2 = refracted angle.

What causes refraction of light?

The cause of the refraction of light is that light travels at different speeds in different medium. This change in the speed of light when it moves from one medium to another causes it to bend. Refraction is caused due to the change in speed of light when it enters from one medium to another.

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The current through the resistor is 0.2 A and the voltage drop across the resistor is 20 V.

The power dissipated by a resistor can be calculated using the formula P = I² * R, where P is the power, I is the current, and R is the resistance. In this case, the power is given as 2.0 W and the resistance is 100 Ω. Plugging these values into the formula, we can solve for the current.

First, rearranging the formula, we have P = I² * R. We can rewrite this as I² = P / R. Substituting the given values, we get I²= 2.0 W / 100 Ω = 0.02 A^2. Taking the square root of both sides, we find I = √0.02 A ≈ 0.1414 A. Therefore, the current through the resistor is approximately 0.2 A.

To find the voltage drop across the resistor, we can use Ohm's Law, which states that V = I * R, where V is the voltage, I is the current, and R is the resistance. Plugging in the values, we have V = 0.2 A * 100 Ω = 20 V. Thus, the voltage drop across the resistor is 20 V.

In summary, the current through the resistor is 0.2 A and the voltage drop across the resistor is 20 V. These values can be calculated using the formulas P = I² * R and V = I * R, respectively.

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An ideal bandpass filter with unit gain and a bandwidth of 200 Hz is applied to the input signal g(t) = 8 cos(400πt) cos(200,000πt) + 18 cos(200,000nt). The center frequency of the filter is 100,200 Hz. We can sketch the amplitude spectrum of the signal at the output of the filter using the following steps:

Step 1: Determine the Fourier transform of the input signal g(t)The Fourier transform of g(t) is given by: G(ω) = π[δ(ω + 2π × 200,000) + δ(ω - 2π × 200,000)] + π/2[δ(ω + 2π × 200) + δ(ω - 2π × 200)]

Step 2: Determine the transfer function of the bandpass filter

The transfer function of the ideal bandpass filter with unit gain and a bandwidth of 200 Hz centered at 100,200 Hz is given by: H(ω) = {1 for |ω - 2π × 100,200| < π × 100, and 0 otherwise}

Step 3: Multiply the Fourier transform of the input signal by the transfer function of the filter

The output of the filter is given by:

Y(ω) = G(ω)H(ω)The product of the Fourier transform of the input signal and the transfer function of the filter is shown in the figure below.

The given signal is a combination of two cosines, where the first cosine has a frequency of 400π radians/second and the second cosine has a frequency of 200,000π radians/second.

The output of the filter is a bandpass signal with a center frequency of 100,200 Hz and a bandwidth of 200 Hz. The amplitude spectrum of the output signal is zero outside the bandpass region and is equal to the product of the amplitude spectrum of the input signal and the frequency response of the filter within the passband region.

The amplitude spectrum of the output signal is shown in the figure below:

Therefore, the amplitude spectrum of the signal at the output of the filter is a bandpass signal with a center frequency of 100,200 Hz and a bandwidth of 200 Hz. The amplitude of the signal within the passband region is given by the product of the amplitude of the input signal and the frequency response of the filter within the passband region.

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The density for a. Mass= 14 g Volume= 28 ml is 0.5 g/ml.

The density for b. Mass= 48 g Volume= 6 cm³ is  8 g/cm³.

The density for c. Mass= 125 g Volume= 12.5 ml is 10 g/ml.

The density for d. Mass=18.7 g Volume =18.7 cm^3 is 1 g/cm³.

The density for e. Mass=15 g Volume=60 ml is 0.25 g/ml.

The density of an object is the ratio of mass to volume of the object. The unit of density is kg/m³, g/cm³ or g/ml, etc.

The density of each object is calculated as follows;

density = mass /volume

density = 14 g / 28 ml

density = 0.5 g/ml

density = mass /volume

density = 48g / 6 cm³

density = 8 g/cm³

density = mass /volume

density = 125 g / 12.5 ml

density = 10 g/ml

density = mass /volume

density = 18.7g / 18.7 cm³

density = 1 g/cm³

density = mass /volume

density = 15 g / 60 ml

density = 0.25 g/ml

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Answer: The answer is C.

Explanation:Just took the quiz

The statement about the relationship between rates of reaction and concentration of reactants true is reactions are slower when there is lower concentration of reactants.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

Oxygen is needed for the reactions that cause artifacts to decay in the ocean.

Some ancient shipwrecks have been well-preserved deep in the ocean.

Reviewing the information in the data table, we conclude that reactions are slower when there is lower concentration of reactants.

Thus, the correct option is C.

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While ball B is a metal ball, ball A is a non-metallic, negatively charged ball. Given: A minor positive charge on a ball called B.

Size is referred to as magnitude. A car is moving more quickly than a bike, for instance, when it comes to speed. In this case, the car is moving faster than the bike by a larger margin. In terms of motion, it describes the absolute or relative size or direction that an object travel.

Scale of Earthquake Power This explains that while there are significant differences in strength (energy) between small and large quakes, the size (amplitude) differences between them are still significant.

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The formula for calculating the kinetic energy k of a rotating wheel is: \(k = 0.5 * m * r^2 * n^2 * π^2 * t^2\)where m is the mass of the wheel, r is the radius of the wheel, n is the number of revolutions per unit of time, t is the time elapsed, and π is a constant equal to approximately 3.14.

The kinetic energy (K) of a rotating wheel can be expressed as:
\(K = 1/2 * I * ω²\)
Where I is the moment of inertia of the wheel and ω is the angular velocity. For a wheel (disk), the moment of inertia can be expressed as:
\(I = 1/2 * m * r²\)
The angular velocity (ω) can be calculated by dividing the total angle rotated (n * 2π, where n is the number of rotations) by the time taken (t):
\(ω = (n * 2π) / t\)
Now, substitute the values of I and ω in the kinetic energy equation:
\(K = 1/2 * (1/2 * m * r²) * ((n * 2π) / t)²K = 1/4 * m * r² * (4π² * n² / t²)\)
Finally, simplifying the equation:
\(K = m * π² * n² * r² / t²\)

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Initial velocity=10m/s=u

Final velocity=v=15m/s

Time=t=2s

\(\boxed{\sf Acceleration=\dfrac{v-u}{t}}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{15-10}{2}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{5}{2}\)

\(\\ \sf\longmapsto Acceleration=2.5m/s^2\)

Answer: a = 2.5 cm/s²

Explanation:

Acceleration = (Final velocity - Initial Velocity)/time taken

a = v-u/t

Initial velocity = 10 cm/s

Final velocity = 15 cm/s

Time = 2 seconds

a = (15-10)/2

a = 5/2

a = 2.5 cm/s²

Therefore the acceleration is 2.5 cm/s²

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Mechanical energy is the type of energy connected to an object's position and motion. Thermal energy is the sum of the kinetic and potential energies of all the components in an object.

Potential energy is a form of stored energy that is dependent on the relationship between different network elements. When a spring is strained or stretched, its potential energy increases. A steel ball has more heat energy when it is raised above surface than when it is brought to Earth.

An object's potential energy relies on where it is in relation to other items. For instance, a brick laying on the ground has less heat energy than one dangling off of a 2 different building.

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Answer:

change the

Explanation:

P = W/time

W = F*d

You have control over how fast you go up the stairs.

You also have control over how far up the stairs you go.

Therefore the answer is

If you don't like distance as an answer, you can carry something up the stairs -- anything that increases F will do.