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The value of the normal force if the coefficient of kinetic friction is 0.22 and the kinetic frictional force is 40 Newtons would be 181.81 Newtons.

The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.

As given in the problem we have to find the  value of the normal force if the coefficient of kinetic friction is 0.22 and the kinetic frictional force is 40 newtons,

Friction force =(coefficient of friction)*Normal force

40 = 0.22* Normal force

Normal Force = 40/0.22

                       =181.81 Newtons

Thus, the normal force comes out to be 181.81 Newtons.

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Shearing

The stress force that causes a mass of rock to pull or twist in opposite directions is called shearing.

Hope this helps! :)

The cyclist's displacement from the starting position after 64 seconds is 256 meters. Their position from point A after that time is 509 meters.

If a cyclist maintains a constant velocity of 4 m/s headed away from point A, their displacement after any given time can be calculated using the formula Δx = vt, where Δx is the displacement, v is the velocity, and t is the time. For a time of 64 seconds, the displacement would be Δx = (4 m/s) × (64 s) = 256 meters.

Since the cyclist starts 253 meters away from point A, the new position (total distance from point A) after 64 seconds can be found by adding the initial distance to the displacement. This gives us a total distance = 253 m + 256 m = 509 meters from point A.

Answer:

Chemical energy into Thermal energy and Light Energy

Explanation:

When candle is burnt then its wax which is a having chemical potential energy in it will burn and convert its chemical potential energy into light energy and thermal energy.

So here the wax will melt down after burning and few of its part will evaporate and convert its energy into thermal energy and light energy both.

So overall if we write energy transformation in this

Chemical potential energy of wax = Light Energy + Thermal energy

Answer: The correct answer is pulses.

Explanation:

Wave is a disturbance which carries energy from one particle to another. Wave is a continuous disturbance.

Pulse is a single disturbance. It travels through one point to another.

Sound wave consists of rarefaction and compression. It need medium to travel.

In the circular wave, the particles move both parallel and perpendicular to the motion of the wave.

Therefore, all waves consist of a continuous series of the pulses.

Heat transfer from one substance to another results in the decrease of temperature in the substance losing heat and an increase in the substance gaining heat. At the melting or boiling points, heat absorbed is used for phase changes instead of raising the temperature. The heat required for a phase change is proportional to the substance's mass.

When heat flows from one substance to another, this process is known as heat transfer. The substance giving off heat, or the higher temperature substance, will experience a decrease in its temperature. Conversely, the substance receiving the heat, or the cooler substance, will see an increase in temperature. This heat transfer continues until both substances reach thermal equilibrium, meaning they have the same temperature.

Specifically, at the melting point or boiling point, heat flow into a substance does not change its temperature but rather is used to change its state. This is because the energy is utilized to break the intermolecular forces that hold the substance in its current phase. For example, when ice melts to become water at its melting point, the temperature remains constant until all the ice has melted. The same is true for boiling; the temperature of the liquid remains constant during the transition to a gas.

The amount of heat required for these phase changes is directly proportional to the mass of the substance undergoing the change. In other words, larger amounts of substance will require more heat to complete the phase transition.

Without the graph, we can't calculate the exact masses. However, by finding the slope of the line representing each object on a force-versus-acceleration graph, and using Newton's Second Law (F=ma), we can solve for the objects' masses.

The question refers to an acceleration-versus-force graph for three objects but unfortunately no graph was provided. However, in order to calculate the mass of the objects from an acceleration-versus-force graph, we could potentially use Newton's Second Law (F = ma), where F is the force, m is the mass, and a is the acceleration. Here's how it would be done:

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The masses of objects 1 and 3 are 0.25 kg and 1.5 kg, respectively.

To find the masses of objects 1 and 3, we can use Newton's second law of motion, which states that force is equal to mass times acceleration:

F = ma

We can rewrite this equation to solve for mass:

m = F / a

Step 1: Find the slope of the line for each object

The slope of a line is equal to rise over run. In an acceleration-versus-force graph, the rise is the acceleration and the run is the force.

For object 1, the slope of the line is 4a / 1 = 4a. This means that object 1 has an acceleration of 4a for every 1 unit of force.

For object 2, the slope of the line is 3a / 2 = 1.5a. This means that object 2 has an acceleration of 1.5a for every 1 unit of force.

For object 3, the slope of the line is 2a / 3 = 0.67a. This means that object 3 has an acceleration of 0.67a for every 1 unit of force.

Step 2: Calculate the mass of each object

Now that we know the acceleration of each object, we can use Newton's second law to calculate their masses.

Mass of object 1:

m1 = F / a1 = 1 / 4a = 0.25 kg

Mass of object 2:

m2 = F / a2 = 1 / 1.5a = 0.67 kg

Mass of object 3:

m3 = F / a3 = 1 / 0.67a = 1.5 kg

Conclusion

The masses of objects 1 and 3 are 0.25 kg and 1.5 kg, respectively.

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Answer:

16m

Explanation:

The initial velocity of the object is 0 ft/sec. The points in time when the object has a velocity of zero are at t=0 and t=3 seconds.

To answer these questions, it's important to understand what the variables represent in this equation. The object's velocity is given by v(t)=t^2−3t where v is the velocity in feet per second and t is the time in seconds.

a) The initial velocity is the velocity of the object at the start, which means at time t=0. By substituting t=0 in the equation, we obtain v(0)=(0)^2 - 3(0) = 0 feet/sec.

b) The object has a velocity of zero when v(t) = 0. In other words, we need to solve the equation t^2−3t = 0 for t. Factoring, we get t(t - 3) = 0, thus t = 0, 3 seconds are the moments at which the object's velocity is zero.

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According to Newton's first law of motion, an object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by an external force. To make an object slow down, an external force in the opposite direction of its motion, such as friction, is required.

According to Newton's first law of motion, an object will continue moving at a constant velocity unless acted upon by an external force. To make an object slow down, an external force in the opposite direction of its motion is required. This force is called friction. Friction can be caused by various factors, such as air resistance or contact with a surface.

Answer:

7055.13 J

Explanation:

Step 1: identify the given parameters

Note: frictional force between the piano and horizontal surface is zero since the plank is frictionless.

Step 2: work done in sliding the piano up the plank = applied force X distance moved by the piano.

The distance moved by the piano is equal to the height above ground when the piano reach top of the plank.

Height of the triangle = 3.49m X sine31.6⁰

Height of the triangle = 1.8287m

Recall, height of the triangle is the height above ground which is equal to the distance moved by the piano

work done in sliding the piano up the plank = applied force X distance moved by the piano.

work done in sliding the piano up the plank = 3858N X 1.8287M

                                                                           = 7055.13 J

Answer:

the correct answer is speed, velocity scored incorrectly on my quiz

Explanation:

Answer:

Option D

Explanation:

Gravity is a force of attraction by virtue of mass of a body. It is an attractive force. It is due to gravity that the planets and hence, the solar system was formed. Starting from the nebula, the gravity caused the nebula to contract and form start. From rest of the material, the dust and gas were pulled in together due to gravity to form planet. The gravity of the Sun holds the planets in their respective orbits.

Thus, option D is correct.

Answer:

Continental climates have WARM summers and COLD winters. People who live with areas that experience continental climates must be prepared for the seasonal changes.

Explanation:

As per the question the car has a mass of 12,00 kg.

The engine exerts a force of 600 N.  [ here newton i.e N is the unit of force]

We are asked to calculate the acceleration of the particle .

From Newton's second law of motion we know that force acting on a particle is mass times the acceleration of the particle . Mathematically it can be written as-

                                   F = ma             [Here F is the applied force,m is the mass which is constant here and ' a' is the acceleration]

Here m =1200 kg

        F = 600 N

Hence the acceleration produced due to the force exerted by the engine on car is-                                        

                                     [tex]a =\frac{F}{m}[/tex]

                                           [tex]=\frac{600 N}{1200 kg}[/tex]

                                             [tex]=0.5 m/s^2[/tex]      [ans]  

Our galaxy, the Milky Way, appears to be a band of stars in the sky, but it's actually a disk. Hundreds of billions of stars are clumped into lines called spiral arms. Earth is located about half-way between the center of the Milky Way and its outer edge.

The speed of the tire at the top of the next hill, which is 8.59 m high, is approximately 15.12 m/s.

a) Variables:

  - [tex]\( h_1 \)[/tex] = Initial height of the hill (22.4 m)

  - [tex]\( h_2 \)[/tex] = Height of the next hill (8.59 m)

  - [tex]\( v_{i1} \)[/tex] = Initial speed of the tire (2.10 m/s)

  -[tex]\( v_{f1} \)[/tex] = Final speed at the top of the first hill

  - [tex]\( v_{f2} \)[/tex] = Final speed at the top of the next hill

  - g = Acceleration due to gravity (-9.8 m/s²)

b) Equation for the first hill:

[tex]\[ v_{f1}^2 = v_{i1}^2 + 2gh_1 \][/tex]

c) Calculate [tex]\( v_{f1} \)[/tex]:

[tex]\[ v_{f1}^2 = (2.10 \, \text{m/s})^2 + 2(-9.8 \, \text{m/s}^2)(22.4 \, \text{m}) \][/tex]

[tex]\[ v_{f1} \approx 16.83 \, \text{m/s} \][/tex]

d) Equation for the next hill:

[tex]\[ v_{f2}^2 = v_{f1}^2 + 2gh_2 \][/tex]

e) Solve for [tex]\( v_{f2} \)[/tex]:

[tex]\[ v_{f2}^2 = (16.83 \, \text{m/s})^2 + 2(-9.8 \, \text{m/s}^2)(8.59 \, \text{m}) \][/tex]

[tex]\[ v_{f2} \approx 15.12 \, \text{m/s} \][/tex]

The speed of the tire at the top of the next hill, which is 8.59 m high, is approximately 15.12 m/s.

Final answer:

The speed of the tire at the top of the next hill is 21.2 m/s.

Explanation:

To find the speed of the tire at the top of the next hill, we can use the principle of conservation of energy.

According to the principle of conservation of energy, the initial potential energy of the tire at the top of the first hill is equal to the final potential energy of the tire at the top of the next hill.

Therefore, we have:

mgh = 1/2 × mv²

Where m is the mass of the tire, g is the acceleration due to gravity, h is the height difference between the two hills, and v is the final velocity of the tire at the top of the next hill.

Plugging in the values, we get:

10.5 × 9.8 × 22.4 = 1/2 × 10.5 × v²

Solving for v, we find:

v = sqrt((2 × 10.5 × 9.8 × 22.4) / 10.5)

v = 21.2 m/s

The Earth's atmosphere can shield against various forms of electromagnetic radiation, mostly blocking gamma rays and allowing radio waves and visible light to penetrate. Thus, gamma rays are the form of radiation primarily shielded by our atmosphere.

The Earth's atmosphere provides a natural shield against various forms of electromagnetic radiation, including gamma rays, X-rays, and ultraviolet (UV) light. These types of radiation pose a potential risk to living organisms due to their high energy levels. However, while the atmosphere blocks most gamma rays and X-rays, completely shielding against all electromagnetic radiation is a different matter.

The atmosphere does allow visible light to pass through, enabling us to see the world around us. Radio waves, especially those on the lower frequency end, can also penetrate the atmosphere, which is why we can receive radio signals. On the other hand, gamma rays, which have the shortest wavelength and highest energy, are indeed absorbed by the atmosphere. This absorption is critical for protecting life on Earth from their potentially harmful effects.

To clarify: Gamma rays are mostly absorbed by the atmosphere, radio waves can generally penetrate it, and visible light travels through it to reach the Earth's surface. Therefore, the correct answer to the question about which form of radiation can be shielded by Earth's atmosphere is primarily gamma rays. However, it's worth noting that the question wording implies all of them can be 'shielded' to an extent, but gamma rays are the ones that are most effectively blocked.

Correct answer choice is :

B) That could not be divided.

Explanation:

Democritus was a Greek scholar who lived within 470-380 B.C. He elaborated the theory of the atom, Greek for permanent. Democritus thought that everything in the world was made up of atoms, which were tiny and durable. They assumed that matter was made up of very small particles. They named these particles atoms, which comes from an antique Greek word signifying permanent. These atoms were supposed to be absolutely indivisible and forever.

Answer:

A. The total momentum of the system is conserved.

The weight of an object is calculated by multiplying its mass by the acceleration due to gravity. With the mass of the African elephant as 6050 kg and Earth's gravity at 9.80 m/s², the elephant's weight would be 59,290 Newtons.

The weight of an object is the force exerted on it due to gravity. It can be calculated using the formula Weight = Mass × Gravity. In this case, the mass of the African elephant is given as 6,050 kg, and the acceleration due to gravity on Earth is 9.80 m/s².

Thus by multiplying the mass of the elephant with the acceleration due to gravity, we get: Weight = 6,050 kg × 9.80 m/s² = 59,290 N. So the weight of the African elephant on Earth would be 59,290 Newtons.

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Final answer:

The average rate of flow of blood along the radius of an artery is found by integrating the velocity equation v = k(R² - r²) from 0 to R, which results in an average velocity formula of (2/3)kR after integration and simplification.

Explanation:

The question asks to find the average rate of flow of blood along a radius of the artery using the given velocity equation v = k(R² - r²) and integrating between the limits 0 and R. To find the average velocity, we integrate the given equation across the artery's radius and then divide by the radius R to calculate the average.

The integration process involves calculating the integral of k(R² - r²) with respect to r, over the interval from 0 to R, which gives us kR²r - (kr³)/3 evaluated between 0 and R. Substituting the limits and simplifying, the result is (2/3)kR². To find the average velocity, we divide this by R, resulting in an average velocity of (2/3)kR.