A sled weighs 160 N. It is held in place on a frictionless 25.0° slope by a rope attached to a stake at the top; the rope is parallel to the slope. What is the normal force of the slope acting on the sled?A. 145 NB. 67.6 NC. 177 ND. 379 NE. 74.6 N

Answer:

0.616

Explanation:

hve a wonderful weekend :) stay safe

Answer:

because sound needs medium to transmit.

The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.

Answer:

Potential energy.

Explanation:

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

In this scenario, a high diver steps off a diving platform that is 10 meters above the water, if no air resistance is present during the fall there will be a decrease in the driver's potential energy. This is simply because the potential energy of all physical objects is greatly or highly dependent on acceleration due to gravity.

Answer:

Explanation:

We shall represent the point of destination and point of new starting point in vector form .

i and j will represent east and north .

point of destination = 123 j

starting point = 112 i

distance between the two

D = 123 j - 112 i

magnitude of D = √ ( 123² + 112² )

= 166.35 km

Direction of D

Tanθ = -  123 / 112

= - 1.09

θ = 132.54 degree from east in positive angle .

Heat transfer is limited to conduction and radiation only in anomalous expansion of water simply because of the temperature at which the expansion occurs and density

Anomalous expansion of water is a property of water in which water expands instead of contracting.

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The potential energy of the system at point A= 6 joules.

We know that there is no loss of energy when a conservative force acts on it.  The total energy is constant it is only transferred to another form which can be easily calculated.

For a conservative force

Total energy = gravitational potential energy + kinetic energy

Now calculating total energy at point B

Total energy =  21  + 0 (velocity is 0 so kinetic energy is zero)

Total energy =  21 joules

Total energy at point A

21 = gpe  +  15

gravitational potential energy = 6 joules

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The planet's climate thermostat, as well as the world's chief greenhouse gas, is primarily water vapor. The correct option is A.

Water vapor is the most abundant greenhouse gas in the atmosphere, accounting for about 60% of the greenhouse effect. It is also the most important feedback mechanism in the climate system. When the Earth's temperature rises, more water evaporates from the oceans and other water bodies. This water vapor then traps more heat in the atmosphere, which further raises the temperature. This feedback loop can lead to runaway climate change.

Carbon dioxide is the second most abundant greenhouse gas in the atmosphere, accounting for about 20% of the greenhouse effect. It is released into the atmosphere by the burning of fossil fuels, deforestation, and other human activities. Carbon dioxide is a very long-lived greenhouse gas, meaning that it can remain in the atmosphere for hundreds of years.

Methane is the third most abundant greenhouse gas in the atmosphere, accounting for about 10% of the greenhouse effect. It is released into the atmosphere by the decomposition of organic matter, such as in landfills and wetlands. Methane is a very potent greenhouse gas, meaning that it has a much stronger warming effect than carbon dioxide.

Ozone is a greenhouse gas that is found in the stratosphere, the layer of the atmosphere that is about 10-50 kilometers above the Earth's surface. Ozone is formed when ultraviolet radiation from the sun splits oxygen molecules into two oxygen atoms. These oxygen atoms then combine with other oxygen molecules to form ozone. Ozone is a very effective absorber of ultraviolet radiation, which helps to protect the Earth from this harmful radiation. However, ozone is also a greenhouse gas, and it contributes to the greenhouse effect.

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The machine's efficiency is 81.61%, indicating that it converts 81.61% of the input energy into useful output energy, while the remaining percentage is lost as waste or dissipated in the process.

To calculate the efficiency, we can use the formula:

Efficiency = (Actual Output / Design Capacity) × 100

Given:

Actual Output = 7,407

Design Capacity = 9,050

Substituting the values into the formula:

Efficiency = (7,407 / 9,050) × 100

          = 0.817 × 100

          = 81.61%

Therefore, the efficiency of the machine is 81.61%.

Efficiency is a measure of how effectively a machine or system is utilizing its available capacity. In this case, the machine has a design capacity of 9,050 units, but it only produced an actual output of 7,407 units.

By dividing the actual output by the design capacity and multiplying by 100, we find that the machine's efficiency is 81.61%. This indicates that the machine is operating at approximately 81.61% of its full capacity.

A higher efficiency percentage would indicate a more optimal utilization of the machine's capacity, while a lower percentage suggests room for improvement in maximizing output.

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Your fine will  be based on your instantaneous speed.

According to the definition,

From the above discussion we can tell that, Your fine will  be based on your instantaneous speed.

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The velocity and acceleration vectors at specific times for particles moving along curves in the xy-plane, we differentiate the position vector to find the velocity vector, and then differentiate the velocity vector to find the acceleration vector. Substituting the given values of time into the equations allows us to find the vectors at the specified times. Sketching the vectors on the curve helps visualize their direction and magnitude.

Exercise 9-12 involves finding the velocity and acceleration vectors of particles moving along curves in the xy-plane at specific times. To find the velocity vector, we need to differentiate the position vector with respect to time.

The velocity vector represents the rate of change of position. To find the acceleration vector, we differentiate the velocity vector with respect to time. The acceleration vector represents the rate of change of velocity.

To find the velocity and acceleration vectors at the stated times, we can follow these steps:

1. Substitute the given values of time into the position vector equation.
2. Differentiate the position vector equation with respect to time to find the velocity vector.
3. Differentiate the velocity vector equation with respect to time to find the acceleration vector.
4. Substitute the values of time back into the velocity and acceleration vector equations to find the vectors at the specified times.
5. Sketch the velocity and acceleration vectors as arrows on the curve, representing their direction and magnitude.

Remember to use appropriate units and ensure that the direction and magnitude of the vectors are accurately represented in the sketches.

In summary, to find the velocity and acceleration vectors at specific times for particles moving along curves in the xy-plane, we differentiate the position vector to find the velocity vector, and then differentiate the velocity vector to find the acceleration vector.

Substituting the given values of time into the equations allows us to find the vectors at the specified times.

Sketching the vectors on the curve helps visualize their direction and magnitude.

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The primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction

Speed and velocity are two critical concepts in physics. They are used to describe the motion of an object. While both describe how fast an object is moving, there are some fundamental differences between the two. Let's explore these differences.

What is speed?

Speed is a scalar quantity that describes how quickly an object moves. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Speed can be calculated using the following formula:

speed = distance ÷ time

For example,

if an object covers a distance of 150 meters in 10 seconds, its speed can be calculated as follows:

Speed = distance ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s)

What is velocity?

Velocity, on the other hand, is a vector quantity that describes how fast an object is moving in a particular direction. It is measured in meters per second (m/s) or kilometers per hour (km/h).

Velocity can be calculated using the following formula:

velocity = displacement ÷ time

For example, if an object travels a displacement of 150 meters in 10 seconds in a specific direction, its velocity can be calculated as follows:

Velocity = displacement ÷ time= 150 meters ÷ 10 seconds= 15 meters per second (m/s) in a specific direction.

In conclusion, the primary difference between speed and velocity is that speed is a scalar quantity that describes how fast an object is moving, while velocity is a vector quantity that describes how fast an object is moving in a particular direction.

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Answer:

B.

Explanation:

B. is correct because every time usually when a hurricane hits it causes flooding causing multiple homes to be ruined. It is a known fact that usually hurricanes start close or in along with tornadoes, the water, meaning once they hit land they have some water to flood that land with.

C. is absolutely false hurricanes have VERY strong wind gusts.

D. is absolutely wrong they do alter landscapes by ripping trees and plants and houses out of the ground making the landscapes look different.

A. is wrong they tend to deposit and remove sediment evenly.

~ LadyBrain

Answer:

B

Explanation:

Assuming the bungee cord is perfectly elastic, the jumper will reach a minimum distance of 14.7 meters from the ground after the cord has stretched.

What is distance?

Distance is the amount of space between two objects or points. It is typically measured in units such as meters, feet, or miles. Distance can also be measured in a more abstract sense, such as the amount of time it takes for something to happen or the amount of effort required to complete a task.

Distance can also refer to the difference between two things, such as the difference between two people’s opinions on a particular topic. Distance can also refer to physical separation, such as the distance between two people who are in different countries or cities. Distance can also be used to express the size of something, such as how far a car can travel on a single tank of gas.

Given: m = mass of jumper = 60kg

            h = height of cliff = 40m

Also,

k = F/x = 40N/1m = 40N/m

Now, when jumper jumps,

F = m×g

= 60×9.8

= 588 N

Therefore,

x = (588N)/(40N/m) = 14.7m

Thus, jumper gets to a close of 14.7 meters to the ground.

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Explanation:

If two persons are applying forces on two opposite sides of a moving cart and the cart still moves with the same speed in the same direction we can infer that the magnitudes of the forces applied by the two persons are equal and the direction of the forces is opposite to each other.

This is because of Newton's First Law of Motion which states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. In this case the cart is already in motion and is moving in a straight line. The forces applied by the two persons are external forces acting on the cart. Since the cart is moving with the same speed and in the same direction we can infer that the forces applied by the two persons are equal in magnitude and opposite in direction.

This is also known as the principle of action and reaction which is the third law of motion. According to this law for every action there is an equal and opposite reaction. In this case the action is the force applied by the two persons on the cart and the reaction is the force exerted by the cart on the two persons in the opposite direction.

Answer:

it is a the answer is a btw

Explanation:

a) The rate at which the length of his shadow changes is 1.5 ft/s.

Given, the height of a man = 6 feet

Height of light = 16 feet

Rate of walk by man, dx/dt = 5 feet per second.

By using the ratio of similar triangles,

y/6=x+y/16

The rate of change of shadow is calculated by differentiating length with respect to time.

16y=6x+6y

10y=6x

10 dy/dt = 6 dx/dt

dy/dt = 3/10 * 5

dy/dt = 3/2

dy/dt=1.5 ft/sec

The length of your shadow depends on how tall you are and where the sun or source of light behind you is in relation to the ground. The lower the angle of the sun the longer the length of the shadow. Also the taller you are the longer the shadow.

The closer an object is to the light source, the larger the shadow it casts. This is because an object closer to the source will block a larger area of the light, increasing its shadow size.

Therefore, the rate at which the length of his shadow changes is 1.5 ft/s.

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Explanation:

a. Determine Luna's average speed.

Luna's Speed: 8.22 m/s

b. Determine Gianna's average speed.

Gianna's Speed: 4.90 m/s

c. How many times faster is Luna's speed?

Luna's Speed is 1.67 times faster

d. Who won the bet?

Luna won the bet.

To determine Luna's average speed, divide distance by time. Luna's speed is 8.23 m/s. Gianna's speed is 4.94 m/s. Luna's speed is 1.66 times faster than Gianna's.

To determine Luna's average speed, we need to divide the total distance of 440 meters by her total time of 53.4 seconds. Dividing the two gives us her average speed of 8.23 m/s.

To determine Gianna's average speed, we follow the same process. We divide the total distance of 440 meters by her total time of 89.1 seconds. This gives us her average speed of 4.94 m/s.

To find out how many times faster Luna's speed is compared to Gianna's, we divide Luna's speed by Gianna's speed. So, 8.23 / 4.94 = 1.66. This means Luna's speed is 1.66 times faster than Gianna's.

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The density of granite is approximately 2.8087 g/cm³.

The density of ivory is approximately 1.84315 g/cm³.

To calculate the density of an object, we use the formula:

Density = Mass / Volume

For the granite:

The volume of the rectangular piece is given by:

Volume = Length x Width x Height = 0.05 m x 0.1 m x 0.23 m = 0.00115 m³

Converting the mass to kilograms:

Mass = 3.22 kg

Density = Mass / Volume = 3.22 kg / 0.00115 m³ = 2808.7 kg/m³

To convert the density to g/cm³:

Density = 2808.7 kg/m³ x 1000 g/kg / (100 cm/m)³ = 2.8087 g/cm³

For the ivory, the volume of the rectangular piece is given by:

Volume = Length x Width x Height = 0.23 m x 0.15 m x 0.155 m = 0.0055455 m³

Converting the mass to kilograms:

Mass = 10.22 kg

Density = Mass / Volume = 10.22 kg / 0.0055455 m³ = 1843.15 kg/m³

To convert the density to g/cm³:

Density = 1843.15 kg/m³ x 1000 g/kg / (100 cm/m)³ = 1.84315 g/cm³

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Answer:

Mass of the larger object

The distance from the central maximum for violet light is 0.0152 meters.

To find the distances from the central maximum for red and violet light, we can use the formula for the position of the m-th order fringe in a double-slit interference pattern:

y = mλL / d

where y is the distance from the central maximum, λ is the wavelength of light, L is the distance from the slits to the screen, d is the distance between the slits.

For red light with a wavelength of 700 nm (700 x 10^-9 m), substituting the values into the formula:

y_red = (1)(700 x 10^-9 m)(0.95 m) / (25 x 10^-6 m)

     ≈ 0.0266 m

Therefore, the distance from the central maximum for red light is approximately 0.0266 meters.

For violet light with a wavelength of 400 nm (400 x 10^-9 m), using the same formula:

y_violet = (1)(400 x 10^-9 m)(0.95 m) / (25 x 10^-6 m)

        ≈ 0.0152 m

Hence, the distance from the central maximum for violet light is approximately 0.0152 meters.

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The correct answer to question:

Explanation:

When g=a, that means everything on earth fall at the same rate.

As such, all objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.

When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.

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Answer:

187N

Explanation:

weight = mass * gravity

weight = 50 * 3.7

weight = 187N

It would take approximately 716,943 years for the New Horizons space satellite to travel to Proxima Centauri at its current speed.

To calculate the number of years it would take for the New Horizons space satellite to travel to Proxima Centauri, we need to convert the speed of the satellite to the appropriate units and then use the formula for time:

Distance = Speed × Time

Given:

Distance to Proxima Centauri = 4.3 light years

Speed of New Horizons = 53,000 kilometers per hour

First, we need to convert the speed of New Horizons from kilometers per hour to light years per year. To do this, we'll use the conversion factor:

1 light year ≈ 9.461 × \(10^{12\) kilometers

Speed of New Horizons in light years per year:

Speed in light years per year = (53,000 kilometers per hour) × (1 year / 8766 hours) × (1 light year / 9.461 × \(10^{12\) kilometers)

Speed in light years per year ≈ 0.000006003

Now, we can calculate the time it takes to travel to Proxima Centauri:

Time = Distance / Speed

Time = 4.3 light years / 0.000006003 light years per year

Time ≈ 716,943 years

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W1=W2, they are directly related, k= spring constant  x= change on length of spring. x= 34-24= 10 cm

The spring constant is calculated by dividing the force required to stretch or compress a spring by the lengthening or shortening of the spring. It is used to identify whether a spring is stable or unstable, and consequently, what system it should be employed in.

It is stated mathematically as k = - F/x, which reworks Hooke's Law. Where x is the displacement caused by the spring in N/m, F is the force applied over x, and k is the spring constant.

Only in the range where the force and displacement are proportionate does Hooke's law adequately explain the linear elastic deformation of materials. Whatever the mass, a spring's elasticity will revert to its initial shape once the external force is eliminated. A characteristic is the spring constant.

Thus, W1=W2, they are directly related, k= spring constant  x= change on length of spring. x= 34-24= 10 cm.

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Answer: water boils in lower temperature so it is possible to distill

Muddy water for getting pure water.

Explanation:

The type of electrical signal that exhibits an all-or-none response is action potential. So, option A is accurate.

An action potential is a rapid and brief reversal of the electrical potential across a cell membrane, which occurs in excitable cells such as neurons and muscle cells. It is characterized by an all-or-none response, meaning that once the threshold stimulus is reached, the action potential is generated at full strength regardless of the strength of the initial stimulus.

In an all-or-none response, the action potential either occurs fully or does not occur at all. If the stimulus reaches the threshold level, the cell membrane depolarizes and generates an action potential that propagates along the length of the neuron or muscle fiber. However, if the stimulus does not reach the threshold, no action potential is generated.

This property of all-or-none response ensures the consistency and reliability of signal transmission in the nervous system. It allows for the generation of precise and rapid electrical signals that can propagate over long distances without losing their strength or information content.

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To find the amount of fabric needed for each colour, we first need to find the total area of the semicircle canopy. The formula for the area of a semicircle is A = (πr²)/2, where r is the radius.

Substituting in the given value of r = 13 feet, we get:
A = (π(13)²)/2 = 265.5 ft²
Since the company wants each parachute to be made from equal parts of red, white, and blue fabric, we need to divide the total area by 3.
265.5 ft² / 3 = 88.5 ft²
So approximately 88.5 ft² of each colour fabric will be needed to make a single parachute canopy.

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Answer: First, work out the difference (decrease) between the two numbers you are comparing. Next, divide the decrease by the original number and multiply the answer by 100. If the answer is a negative number, this is a percentage increase.

this is filled just send it to your teacher but change name and date