does the distribution of fatal injuries for riders not wearing a helmet follow the distribution for all riders? use level of significance. what are the null and alternative hypotheses?

The engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.

What is forward force?

Forward force is the force applied in the direction of motion, which causes an object to move or maintain a constant velocity.

Constant velocity refers to the motion of an object moving in a straight line at a steady speed, without changing its direction. The velocity of the object is constant when its speed and direction remain unchanged over time, regardless of whether the object is moving or stationary.

Since the train is moving at a constant velocity, the net force acting on the train is zero. Therefore, the forward force provided by the engine must be equal in magnitude and opposite in direction to the force of air resistance and surface friction.

So, the magnitude of the forward force provided by the engine is:

Magnitude of forward force = Magnitude of force of air resistance and surface friction

Magnitude of forward force = 259,800 N

Therefore, the engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.

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The voltage is stepped up before being transmitted from a power station through overhead power lines to the consumer in order to reduce power loss and make the overhead power lines lighter, less expensive to build.

Here is the explanation why voltage is stepped up before being transmitted from a power station through overhead power lines to the consumer:

Power loss is inversely proportional to the square of the current. This means that if we can reduce the current, we can also reduce the power loss.

The current is inversely proportional to the voltage. This means that if we increase the voltage, we can reduce the current.

Therefore, by increasing the voltage, we can reduce the power loss.

In addition, the higher the voltage, the smaller the cross-sectional area of the conductors needed to transmit the same amount of power. This makes the overhead power lines lighter and less expensive to build.

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Explanation:

Distance 250m, displacement 50m

Answer:

At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels. ... Since most of the atmosphere's molecules are held close to the earth's surface by the force of gravity, air pressure decreases rapidly at first, then more slowly at higher levels.

Explanation:

happy to help:)

Answer:

57 m

Explanation:

Given:

v₀ = 25 m/s

v = 13 m/s

t = 3 s

FInd: Δx

Δx = ½ (v + v₀) t

Δx = ½ (13 m/s + 25 m/s) (3 s)

Δx = 57 m

SAS detects the end of a step through the use of run and quit statements, as well as the beginning of another step. These markers are essential in SAS programming to organize and execute complex programs effectively.

When SAS encounters a run statement, it signals the end of a step and begins to execute the step. The run statement is typically used to signal the end of a data or proc step in SAS code. Similarly, when a quit statement is encountered, it signals the end of the entire program and stops the execution of the current step. This is often used to exit from a loop or a conditional statement in the SAS program.

Finally, the beginning of another step marks the end of the current step. In SAS, a step can be defined as a series of statements that are executed together to accomplish a specific task. When SAS encounters the beginning of another step, it signals the end of the current step and begins to execute the next step. This helps to break down large SAS programs into smaller, more manageable steps.

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The mass of a diamond is 210.6 carats.

The mass of the diamond can be calculated by using the formula:

Mass = Density × Volume

Given that the density of the diamond is 3.51 g/cc and the volume is 12 cc, we can plug these values into the formula to find the mass:

Mass = 3.51 g/cc × 12 cc

Mass = 42.12 g

Therefore, the mass of the diamond is 42.12 grams.

To find the number of carats in this diamond, we can use the conversion factor that

1 carat = 200 mg.

First, we need to convert the mass of the diamond from grams to milligrams:

42.12 g × 1000 mg/g = 42120 mg

Then, we can use the conversion factor to find the number of carats:

42120 mg × (1 carat/200 mg) = 210.6 carats

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Explanation:

Kinetic energy of an object is given by :

\(E=\dfrac{1}{2}mv^2\)

Where

m is mass and v is velocity of the object

A. Mass, m = 300 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 300\times 16.67^2\\\\=41683.33\ J\)

B. Mass, m = 1100 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 1100\times 16.67^2\\\\=152838.89\ J\)

C. Mass, m = 900 kg.

Speed, v = 80 km/h = 22.22 m/s

\(E=\dfrac{1}{2}\times 900\times 22.22^2\\\\=222177.78\ J\)

D. Mass, m = 2000 kg.

Speed, v = 50 km/h = 13.88 m/s

\(E=\dfrac{1}{2}\times 2000\times 13.88^2\\\\=192654.4\ J\)

The kinetic energy in case C is maximum.

Answer:

The answer is below

Explanation:

When a gallon is blown the air energy is saved as potential energy which is compressed inside the balloon. However, when the balloon is released without trying its neck, the air energy quickly turned to kinetic energy, in which the air energy keeps moving as the balloon float around the space.

Hence, in short, what happens in terms of energy when you blow up a balloon and release it without trying its neck​ is that the air energy moves from potential energy to kinetic energy.

The rate of a zero-order reaction is constant and independent of the concentration of the reactant force. The half-life for zero-order reactions is inversely proportional to the initial concentration of the reactant.

The equation for the zero-order reaction is as follows:A → B + Cwhere A is the reactant, and B and C are the products.The half-life of a zero-order reaction is given by the formula: Half-life t1/2= [A]0/2kWhere [A]0 is the initial concentration of A, k is the rate constant of the reaction.

The half-life of a zero-order reaction is inversely proportional to the initial concentration of the reactant, and it is independent of the concentration of the reactant. The completion time is the time it takes for the reaction to be complete.

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After slowing down by 15 miles per hour and reducing the speed by one third, you are now going at 60 miles per hour.

If you are initially driving at a rate of one and a half miles per minute, it means you are traveling at a speed of 90 miles per hour (since there are 60 minutes in an hour).

In the second step, you slow down by 15 miles per hour. This reduces your speed to 75 miles per hour.

Finally, you reduce your speed by one third, which means you need to subtract one third of 75 from 75. One third of 75 is 25, so subtracting 25 from 75 gives you a speed of 50 miles per hour.

Therefore, after slowing down by 15 miles per hour and then reducing your speed by one third, you are now traveling at a speed of 50 miles per hour.

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The working formula for the electric charge is given by:
q = CεE
where q is the electric charge, C is the constant involving the properties of the gas environment, the plastic sphere, and the electric field chamber, ε is the permittivity of the gas environment, and E is the electric field strength.

The properties involved in the constant C are:

1. The radius of the plastic sphere (r) - measured in meters (m)

2. The pressure of the gas environment (P) - measured in Pascals (Pa)

3. The temperature of the gas environment (T) - measured in Kelvin (K)

4. The number density of the gas environment (n) - measured in number of particles per cubic meter (m-3)

5. The mobility of the ions in the gas environment (μ) - measured in meters squared per Volt-second (m2V-1s-1)

These properties are combined in the constant C to give the electric charge of the plastic sphere in the electric field chamber.

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A protogalactic cloud with very little angular momentum is more likely to form an elliptical galaxy than a spiral galaxy. This statement is true.

In astronomy, the formation of galaxies is a topic of significant importance. The universe is home to many galaxies of different shapes and sizes. According to modern theories of galaxy formation, the initial state of a galaxy is a protogalactic cloud. This is a giant, diffuse cloud of gas and dust that will eventually form a galaxy. When the protogalactic cloud has little angular momentum, it is likely that the cloud will collapse uniformly and form an elliptical galaxy.

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Experiment 1 Understanding of low voltage electrical apparatus: Purpose of the experiment1) Master the usage of common electrical tools.2) Master the common identification methods of low pressure.3) Master the function of low-voltage electrical apparatus and their correct application. Experiment contents and requirements

The experiment requires observing common low-voltage apparatus and understanding their structure. The following requirements are required:1. Drawing electrical symbols2. Writing text symbols3. Describing the basic working principle and function of low-voltage electrical components that are observed in the experiment report and content for the experiment report, follow this steps:1. Purchase the uniform standard experimental report paper in the academic affairs office.2. Fill in according to the items specified in the test report.3. Draw the electrical symbols and write the text symbols according to the observed low-voltage electrical components.4.

According to the observed low-voltage electrical components, the basic working principle and function are briefly described.

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Answer:

C.

Carbohydrates and proteins are more important to a healthy life than triglycerides.

Sorry if it wrong.

Explanation:

ANSWER

EXPLANATION

Parameters given:

Refractive index, n = 1.15

Wavelength of the light, λ = 410.74 nm

To find the minimum thickness of the non-reflective coating, apply the formula:

Therefore, the minimum thickness of the non-reflective coating is:

That is the answer.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 0.046 \times {15.5}^{2} \\ = 0.023 \times 240.25 \\ = 5.52575\)

We have the final answer as

Hope this helps you

Answer:

The police car is moving at 41.24 m/s.

Explanation:

To find the speed of the police car we need to use the Doppler equation:

\( f = f_{0}(\frac{v + v_{r}}{v + v_{s}}) \)      

Where:

v: is the speed of the sound = 343 m/s

\(v_{r}\): is the speed of the receiver = 12 m/s

\(v_{s}\): is the speed of the source =?

f: is the observed frequency = 959 Hz

f₀: is the emitted frequency = 1038 Hz          

Both terms are positive in the fraction because the velocity of the sound is in the opposite direction to both velocities of the police car and the other car.  

By solving the above equation for \(v_{s}\) we have:        

\( v_{s} = \frac{f_{0}(v + v_{r})}{f} - v = \frac{1038(343 + 12)}{959} - 343 = 41.24 m/s \)  

Therefore, the police car is moving at 41.24 m/s.

I hope it helps you!                  

The magnitude of the velocity of the eagle is 69km/hr.

Given that,

Now the magnitude of the velocity of the eagle is

We know that

Momentum = Mass × velocity

345 = 5 × velocity

So, the velocity is 69 km/hr.

Therefore we can conclude that the magnitude of the velocity of the eagle is 69km/hr.

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Answer:

I. 56

II. c is the speed of light in vacuum.

III. 385.180×10¯²⁷ Kg.

Explanation:

I. Determination of the value of p.

²³⁸₉₂U + ¹₀n —> ¹³⁹ₚBa + ⁹⁷₃₆Kr + 3 ¹₀n

92 + 0 = p + 36 + 3(0)

92 = p + 36

Collect like terms

92 – 36 = p

56 = p

Therefore, the value of p is 56

II. Determination of the meaning of c

ΔE = Δmc²

In the Einstein's equation above,

E => is the energy

m => is the mass

c => is the speed of light in vacuum.

III. Determination of the total mass of the element formed after the reaction.

From the reaction above, the elements formed after the reaction are:

Barium–139 and Krypton–97. Thus, we can obtain the total mass of the elements formed as follow:

Mass of Ba–139 = 232.560×10¯²⁷ Kg

Mass of Kr–97 = 152.620×10¯²⁷ Kg

Total mass =?

Total mass = mass of Ba–139 + mass of Kr–97

Total mass = 232.560×10¯²⁷ + 152.620×10¯²⁷

Total mass = 385.180×10¯²⁷ Kg

Answer and Explanation:Option A->The innermost layer of the earth is known as the core. It is divided into inner core and outer core. It comprises of a high concentration of nickel and iron.

When an object is moving with a constant velocity, you know the magnitude of speed.

Velocity is a vector quantity that has both magnitude and direction. If an object moves with a constant velocity, the magnitude of its velocity does not change, which means that the speed is constant.

The speed of an object moving with constant velocity can be determined using the formula:

v = d/t

where v is the speed, d is the distance traveled, and t is the time taken.

Anytime an object is moving with a constant velocity, it is not accelerating.

This means that the net force acting on the object is zero, or in other words, the forces acting on the object are balanced.

In such a scenario, the object will continue to move in a straight line with the same speed and direction until acted upon by an external force.

If an object is moving with a constant velocity in one direction, it is important to note that the same velocity can also be achieved by an object moving with the same magnitude of velocity but in the opposite direction.

This is because velocity has both magnitude and direction, so two vectors with equal magnitude but opposite direction are considered equal in magnitude but opposite in direction.

This means that velocity is a vector quantity that can be represented graphically using a vector diagram.

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Complete question :

Tony drives his car . He drives the first 13 miles in 13 minutes. He then drives at an average speed of 68mph for 1 hour 24 minutes . Find how much petrol he uses using the information in the table.

Requires table to answer question is attached below

Answer:

2.64 gallons

Explanation:

Given that:

First 13 miles takes 13 minutes

Average rate = 13 miles / 13 minutes = 1mile/minute ; Average rate per hour = (1 mile /minute * 60) = 60 miles /hour

If average speed = 65mph or less ; 50 miles per gallon (it uses 1 gallon for 50 miles)

Hence, since first phase rate is 60 mph,; then miles per gallon is 50 miles

Therefore,gallon of petrol used for 13 miles will be :

13 miles / 50 mpg = 0.26 gallons

2nd phase:

Average rate of 68 mph for 1 hour 24 minutes (1.4 hours)

Here, miles per gallon = 40 (that is; 40 miles for 1 gallon).

Total distance covered = 68 * 1.4 = 95.2 miles

Petrol used = 95.2 miles / 40 mpg = 2.38 gallons

Hence,

Total petrol used : (0.26 + 2.38) = 2.64 gallons

The top of the New England Merchants Bank Building in Boston moves a certain distance side to side during an oscillation caused by wind. This distance can be calculated using the height of the building, the frequency of oscillation, and the acceleration of the top of the building.

To calculate the total distance that the top of the building moves during the oscillation, we can use the formula:

Distance = 2 * Amplitude

The amplitude represents the maximum displacement of the top of the building from its equilibrium position. In this case, the amplitude is equal to the acceleration of the top of the building divided by the square of the frequency:Amplitude = (Acceleration / (2 * π * Frequency)^2)

Given that the acceleration of the top of the building is 2.0% of the free-fall acceleration and the frequency is 0.17 Hz, we can substitute these values into the formula to calculate the amplitude. Once we have the amplitude, we can multiply it by 2 to obtain the total distance that the top of the building moves side to side during the oscillation.

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A rope with 10.5 N tension pulling a 2.0 kg physics textbook up a frictionless slope with angle 4. The book's speed after being pulled 2.0 m is 3.0 m/s, So the angle of the frictionless slope is approximately 64.1 degrees.

Explanation:

To find the angle of the slope, we need to first determine the acceleration of the book and then use the tension force, book mass, and acceleration to solve for the angle.

Here are the steps:

step1. Calculate the acceleration:
Use the equation v^2 = u^2 + 2as, where v is the final speed, u is the initial speed (assumed 0 m/s), a is the acceleration, and s is the distance.
3.0^2 = 0 + 2*a*2.0 => a = 2.25 m/s²

step2. Calculate the force parallel to the slope:
Use Newton's second law, F = ma, where F is the force parallel to the slope, m is the mass, and a is the acceleration.
F = 2.0 * 2.25 = 4.5 N

step3. Calculate the angle:
The tension force is pulling the book up the slope. To find the angle, we can use the equation Tension * cos(angle) = F.
10.5 * cos(angle) = 4.5 => cos(angle) = 4.5 / 10.5 => angle = arccos(4.5 / 10.5)

angle ≈ 64.1°

The angle of the frictionless slope is approximately 64.1 degrees.

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Answer:

Poseidon

Explanation:

Poseidon was justifiably not happy to learn that his son had suffered in this way, which made him hate Odysseus even more. After Homer invoked the muses at the beginning of the Odyssey, the poet mentioned that Poseidon had a grudge against Odysseus, which made his journey home to Ithaca difficult.

The main cause of the difference in temperature on a daily basis is because of the water surrounding the Florida.

The average thermal energy of the particles in a substance is measured by its temperature. It is a way to express how hot or cold an object is in relation to a reference point, typically a standard temperature scale like Celsius or Fahrenheit. It reflects the heat content of a body.

Florida's proximity to huge bodies of water, which have a moderate impact on the temperature, is mostly to blame for the difference in temperature swings between Florida and a dry desert climate. The water steadily absorbs heat and releases it, lowering temperature swings and fostering a more stable atmosphere. Florida also has a lower altitude than most other states, which helps to stabilize its temperature. Temperatures in Florida are kept warmer in part by the state's increasing sunshine. The larger temperature variations in the desert may also be a result of the shorter daylight hours, as the daytime temperatures can get quite hot and the overnight temperatures can go very low.

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The current in each loop of the solenoid is 6.25 A. current is placed inside the solenoid, we can assume that the current passing through each loop is the same.

The solenoid is 17 cm long and has 800 loops of wire. Since the wire carrying the 5.0 A current is placed inside the solenoid, we can assume that the current passing through each loop is the same.

To find the current in each loop, we can use the formula:

I_solenoid = N * I_wire

Where:

I_solenoid is the current in the solenoid,

N is the number of loops,

I_wire is the current in the wire.

Plugging in the values, we have:

I_solenoid = 800 * I_wire

5.0 A = 800 * I_wire

Solving for I_wire, we get:

I_wire = 5.0 A / 800 = 0.00625 A

Therefore, the current in each loop of the solenoid is 6.25 A.

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Squids and octopuses forcefully expel water through the siphon after ingesting it, propelling themselves through the water. Third Law of Newton.

His third law asserts that there is an opposite and an equal response in nature for every action (force). When an object A pulls on an object B, the opposite force is applied to the first object by object B. Alternatively said, interactions lead to forces.

There are numerous real-world applications of Newton's third motion law. For instance, when you leap, the earth exerts an equal and opposing reaction force that propels you into to the air. This is because when you apply a force to it with your legs, it responds in kind. Rockets and other projectiles are designed using Newton's third law by engineers.

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