2. suppose that a 1000 kg car is traveling at 25 m/s (55 mph). its brakes can apply a force of 5000 n. what is the minimum distance required for the car to stop?

Public opinion plays a crucial role in shaping environmental law and regulation. The involvement of the public in environmental decision-making can lead to more effective and sustainable policies.

It serves as a mechanism for holding policymakers and regulators accountable and ensures that environmental protection remains a priority. Public opinion can influence the formulation and implementation of environmental policies through advocacy and activism.
It can also shape the public discourse on environmental issues, promoting awareness and engagement. The most important role of public opinion is to provide feedback and guidance to policymakers, regulators, and lawmakers, which can help to ensure that environmental laws and regulations reflect the needs and aspirations of the public.

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Option B; In a mechanical wave, the restoring force is the force that actually causes the oscillation opposite the direction of the displacement from equilibrium.

Oscillation is the repeating or periodic oscillation of a quantity, often in time, around a central value (often an equilibrium point) or between two or more states. A swinging pendulum and alternating current are two common examples of oscillation. Physics can employ oscillations to simulate intricate interactions, as those between atoms.

The beating of the human heart (for circulation), business cycles in economics, predator-prey population cycles in ecology, geothermal geysers in geology, the vibration of the strings in guitars and other string instruments, the periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in astronomy are just a few examples of the dynamic systems that exhibit oscillations in nearly every branch of science.

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Answer:

Ek = 1705.28 [J]

Explanation:

In order to solve this problem, we must remember that kinetic energy can be calculated by means of the following equation.

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

where:

m = mass [kg]

v = velocity [m/s]

Ek = kinetic energy [J] (Units of Joules)

For the person running

\(E_{k} =\frac{1}{2}*52.2*(3.5)^{2} \\ E_{k} =319.72[J]\)

For the bullet

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

\(E_{k} =\frac{1}{2} *0.02*(450)^{2} \\E_{k}=2025 [J]\)

The difference in Kinetic energy is equal to:

Ek = 2025 - 319.72

Ek = 1705.28 [J]

Answer: 1703.44

Explanation: trust

Answer: A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.

The instantaneous power of the engine of the car is 121 kW.

The given parameters:

The force exerted by the car is calculated as follows;

\(F = \frac{m(v- u)}{t} \\\\F = \frac{1500(27.78-0)}{5.2 } \\\\F = 8013.46 \ N\)

The total force exerted on the engine is calculated as follows;

\(F= 8013.5 \ N + \ 700 \ N\\\\ F = 8713.46 \ N\)

The instantaneous power of the engine is calculated as follows;

\(P = F\bar v\\\\P = F \times (\frac{v-u}{2} )\\\\P = 8713.46 \times (\frac{27.78 -0}{2} )\\\\P = 1.21 \times 10^5 \ W\\\\P = 121 \ kW\)

Thus, the instantaneous power of the engine of the car is 121 kW.

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The work done when a 2.2-kilogram mass is pulled by a 30-newton force through a distance of 5.0 meters is 150 Joules.

To calculate the work done, we need to use the formula: Work = Force x Distance. In this case, the force applied is 30 newtons and the distance travelled is 5 meters. Therefore, the work done is:

Work = 30 N x 5 m = 150 Joules

The unit of work is Joules and it represents the amount of energy required to move the mass over a distance of 5 meters. It's important to note that work is only done when there is a displacement of an object in the direction of the force applied.

In this scenario, the 2.2-kilogram mass is being pulled by a 30-newton force in the direction of motion. The force is able to overcome the resistance of the mass and cause it to move through a distance of 5 meters. Therefore, work is being done on the mass by the force applied.

Overall, the work done is equal to the product of the force and the distance travelled, which is 150 Joules in this case.

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Answer:They have 10

Explanation:

Answer:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object

Answer:

It’s actually A) Inversely

Explanation:

Answer:

point a and c

Explanation:

point a and c

According to the above information and diagram, at Points A and C the velocity of the car is the same, so option B is correct.

When anything is moving, its velocity tells us how quickly that something's location is changing from a certain vantage point and as measured by a particular unit of time.

If a point moves along a path and covers a certain distance in a predetermined amount of time, its average speed over that period of time is equal to the distance covered divided by the travel time. A train traveling 100 kilometers in two hours, for instance, is doing it at an average speed of 50 km/h.

As the car accelerates from point A and decelerate at point B and then again accelerate from point B and gain the highest velocity at point C therefore, the velocity of the car is the same at point A and C.

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Answer:

Car D

Explanation:

Answer:

The corect answer is car D hope this helped (:

Explanation:

The factor that suggests that an elliptical galaxy will form is : ( B ) Higher angular momentum

The formation of elliptical galaxy occurs when two sprial corals collide with eachother which causes the spiral corals to lose their shape forming elliptical galaxies in the process. the collision of the spiral corals is made possible by angular momentum possesed by the spiral corals.

Hence we can conclude that The factor that suggests that an elliptical galaxy will form is Higher angular momentum

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The length of the edge of its unit cell  is  mathematically given as

a = 420 pm

Extending from one point to another, length is the unit of measurement for distance.

According to the SI, length is a distance dimension. Typically, a length unit is selected as the basis for the system, with all other units of measurement being derived from it.

The metre is the fundamental length standard used throughout the International System of Units.

Generally, the equation for density  is  mathematically given as

density = Z x M / No x a3

Therefore

density = 4 x 74.6 / 6.02x10^23

density = 6.67 g/cm3

In conclusion,

6.67 g/cm3 = (4)(74.6) / (6.02x1023)(a3)

a3 = 7.43x10-23 cm3

a = 420 pm

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Answer:

Explanation:

See the attached figure . See the forces acting on man pulling up the box .

Man is stationary so net force acting on man is zero .

T + R = Wman

R is the reaction force of the ground of second floor  .

R = Wman - T

Answer:

its electrons

Explanation:

only electrons stays outside the nucleus unlike protons and neutrons and it has little to no mass

Answer: To calculate the current, we can use the formula I = P/V, where I is the current, P is the power, and V is the voltage.

For a 500 watt lightbulb and a 120 volt wall socket, the current would be:

I = P/V

I = 500/120

I = 4.17 amps

Therefore, the current would be 4.17 amps.

This formula is derived from Ohm's law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. In this case, the resistance of the lightbulb is not given, but we can assume that it is constant. By knowing the power and voltage, we can use the formula to calculate the current.

Explanation:

The term that describes elements that are usually dull and brittle, and do not conduct electricity is nonmetal

Nonmetals are a group of elements in the periodic table that have properties opposite to those of metals. They are typically poor conductors of heat and electricity, and they have low melting and boiling points. Nonmetals are found on the right side of the periodic table and include elements such as hydrogen, carbon, nitrogen, oxygen, and fluorine, among others.

It is a chemical element that typically doesn't have a lot of metallic characteristics; examples include colorless vapors and glossy solids. Nonmetal electrons act differently from their metal counterparts.

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Let's just suppose this situation, so it's like this;

Q --------------- q --------------- Q

Now, acc. to the question, the system is equilibrium which means that possibly both the Q should be exerting some pressure on the middle charge q, so let's suppose Q be +ve and q be -ve

The charge that we have kept at a certain distance something like this;

+Q --------------- -q --------------- +Q

<––– d ––– > <––– d ––– >

Now, we +Q will be exerting some force on the another +Q that it should be acc. to columbs law like this;

F = k × Q1Q2/r²

F = k × QQ/(2d)²

F1 = k × Q²/4d²

Also, when this +Q will exert force on -q, it could be written as;

F = k × Q1Q2/r²

F2 = k × Qq/d²

From the question, we know that the system is a equilibrium which means that these two force F1 and F2 will be equal to each other;

= k × Q²/4d² = k × Qq/d²

= Q/4 = q

= Q/4 = -q

= -Q/4 = q

So, the charge on q is -Q/4.

-------------------------------------------

Have already answered this question, but still!

another answer for acellus is 143 m/s it worked for me

The speed of the charge is approximately 2.857 m/s.

To find the speed of the charge, we can use the formula for the magnetic force on a charged particle moving through a magnetic field:

Force (F) = q * v * B * sin(θ)

Where:

F is the force on the charge (given as 2.14 x \(10^-8\)  N),

q is the charge of the particle (given as 2.99  x \(10^-6\)C),

v is the speed of the charge (what we want to find),

B is the magnitude of the magnetic field (given as 5.00 x \(10^-5\) T),

θ is the angle between the direction of motion and the magnetic field (given as 10.0°).

First, we need to convert the angle from degrees to radians:

θ (in radians) = 10.0° * (π / 180°) ≈ 0.174532925 radians

Now, we can rearrange the formula to solve for the speed (v):

v = F / (q * B * sin(θ))

Substitute the given values into the equation:

v = 2.14 x \(10^-8\) N / (2.99 x \(10^-6\) C * 5.00  x \(10^-5\)  T * sin(0.174532925))

v ≈ 2.857143 m/s

Therefore, the speed of the charge is approximately 2.857 m/s.

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The correct steps for the synthesis of fibronectin are D E B and A

The extracellular matrix (ECM) component fibronectin (FBN) plays a crucial role in the interaction between the intracellular and extracellular environments by attaching to integrin receptors on the cell surface. This regulates the behaviour of the cell.

As a protein, fibronectin goes through certain common stages in the synthesis process with other proteins. To make mRNA, the DNA must first be translated into mRNA, which is then translated in the ribosomes. Here, the translated mRNA causes the amino acids to line up in a chain, and this chain is what we refer to as a protein. Fibronectin is then created as a last step.

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Complete Question:

Fibronectin is a protein produced by cells in the liver. One function of fibronectin is forming blood clots to heal wounds.Order the steps that take place in the synthesis of fibronectin.

A. Fibronectin is produced.

B. Bonds are formed between the amino acids.

C. Amino acids bond to the DNA.

D. DNA is transcribed to produce mRNA.

E. Amino acids line up in order.

Answer: A 100-lb child stands on a scale while riding in an elevator. Then, the scale reading approaches to 100lb, while the elevator slows to stop at the lowest floor

Explanation: To find the correct answer, we need to know more about the apparent weight of a body in a lift.

                             \(ma=mg-N\\N=mg-ma\)    i.e. during riding the scale reads a weight less than that of actual weight.

Thus, from the above explanation, it is clear that ,when the elevator moves to the lowest floor slowly and stops, then the apparent weight will become the actual weight.

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Answer:

Loss of momentum

Explanation:

Centripetal force is the name given to any force which causes a change in direction of velocity toward the center of the circular motion. The component of the force which is perpendicular to the velocity is the part resulting in the centripetal force

Answer:

  i = 17.6 10⁻⁶ A

Explanation:

The charge of a capacitor in a series circuit is

           i = \(\frac{v_o}{R}\) \(e^{ - \frac{t}{RC} }\)                     (1)

           R i = V₀  e^{ - \frac{t}{RC} }

           \(\frac{V}{V_o}\) = e^{ - \frac{t}{RC} }

they tell us that the voltage is 80% bone

           \(\frac{V}{V_o}\) = 0.80

we substitute

           0.80 = e^{ - \frac{t}{RC} }

           ln 0.80 = \(- \frac{t}{RC}\)

           t = - RC ln 0.80

in the problem they give the value of R = 2.0 10⁶ Ω and C = 4.0 10⁻⁶ F

          t = - 2 10⁶  4 10⁻⁶ ln 0.8

          t = 1,785 s

we substitute in equation 1

         i = \(\frac{44.0}{2 \ 10^6}\) \(e^{- \frac{1.785}{2 \ 4 } }\)

         i = 22 10⁻⁶ \(e^{-0.2231}\)

         i = 17.6 10⁻⁶ A

when force stays the same and the mass increases, the ACCELERATION DECREASES.

Answer:

173.99 centimeters

Explanation:

multiply the length value by 2.54

Answer:

A chemistry student’s height is measured at 68.5 inches. How tall is the student in cm?

Explanation:

When you hold your physics textbook in your hand without any other objects in contact with it, you are exerting a force on the book to counteract its weight. This force is known as the normal force, and according to Newton's third law, the book exerts an equal and opposite force on your hand.

When you hold your physics textbook in your hand and assume that no other objects are in contact with the book, there are a few key concepts to consider:

1. Force: When you hold the book, you are applying a force on it. This force is exerted by your hand and is directed upwards to counteract the force of gravity pulling the book downwards.

2. Newton's Third Law: According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this case, the book exerts a force on your hand that is equal in magnitude but opposite in direction to the force you exert on the book.

3. Normal Force: The force your hand exerts on the book is known as the normal force. It is called the normal force because it acts perpendicular to the surface of contact between your hand and the book. The normal force balances the force of gravity and prevents the book from falling through your hand.

4. Weight: The book has a weight, which is the force of gravity acting on it. The weight of the book is equal to the mass of the book multiplied by the acceleration due to gravity (9.8 m/s^2 on Earth). When you hold the book, you are supporting its weight by exerting an equal and opposite force.

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Answer:

Matter, Force

Explanation:

In scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define) whereas weight is the force exerted on an object by gravity. Objects on the surface of the Earth have weight, although sometimes the weight is difficult to measure.

The mass of the car is calculated as 1021.86 kg. We can calculate the mass of the car by using the formula: mass = Force / acceleration

Given information: Acceleration of the car = 1.83 m/s²

Force acting on the car = 1870 N

We know that Force = mass × acceleration

According to the question, we need to find the mass of the car. We can calculate the mass of the car by using the formula: mass = Force / acceleration

Putting the values in the above equation, we get mass = 1870 N / 1.83 m/s²

So, the mass of the car is: mass = 1021.86 kg

Therefore, the mass of the car is 1021.86 kg.

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Answer:

Once you have drawn the free-body diagram, you can use vector addition to find the net force acting on the object. We will consider three cases as we explore this idea:

Case 1: All forces lie on the same line.

If all of the forces lie on the same line (pointing left and right only, or up and down only, for example), determining the net force is as straightforward as adding the magnitudes of the forces in the positive direction, and subtracting off the magnitudes of the forces in the negative direction. (If two forces are equal and opposite, as is the case with the book resting on the table, the net force = 0)

Example: Consider a 1-kg ball falling due to gravity, experiencing an air resistance force of 5 N. There is a downward force on it due to gravity of 1 kg × 9.8 m/s2 = 9.8 N, and an upward force of 5 N. If we use the convention that up is positive, then the net force is 5 N - 9.8 N = -4.8 N, indicating a net force of 4.8 N in the downward direction.

Case 2: All forces lie on perpendicular axes and add to 0 along one axis.

In this case, due to forces adding to 0 in one direction, we only need to focus on the perpendicular direction when determining the net force. (Though knowledge that the forces in the first direction add to 0 can sometimes give us information about the forces in the perpendicular direction, such as when determining frictional forces in terms of the normal force magnitude.)

Example: A 0.25-kg toy car is pushed across the floor with a 3-N force acting to the right. A 2-N force of friction acts to oppose this motion. Note that gravity also acts downward on this car with a force of 0.25 kg × 9.8 m/s2= 2.45 N, and a normal force acts upward, also with 2.45 N. (How do we know this? Because there is no change in motion in the vertical direction as the car is pushed across the floor, hence the net force in the vertical direction must be 0.) This makes everything simplify to the one-dimensional case because the only forces that don’t cancel out are all along one direction. The net force on the car is then 3 N - 2 N = 1 N to the right.

Case 3: All forces are not confined to a line and do not lie on perpendicular axes.

If we know what direction the acceleration will be in, we will choose a coordinate system where that direction lies on the positive x-axis or the positive y-axis. From there, we break each force vector into x- and y-components. Since motion in one direction is constant, the sum of the forces in that direction must be 0. The forces in the other direction are then the only contributors to the net force and this case has reduced to Case 2.

If we do not know what direction the acceleration will be in, we can choose any Cartesian coordinate system, though it is usually most convenient to choose one in which one or more of the forces lie on an axis. Break each force vector into x- and y-components. Determine the net force in the x direction and the net force in the y direction separately. The result gives the x- and y-coordinates of the net force.

Example: A 0.25-kg car rolls without friction down a 30-degree incline due to gravity.

We will use a coordinate system aligned with the ramp as shown. The free-body diagram consists of gravity acting straight down and the normal force acting perpendicular to the surface.

We must break the gravitational force in to x- and y-components, which gives:

F_{gx} = F_g\sin(\theta)\\ F_{gy} = F_g\cos(\theta)F

gx

​

=F

g

​

sin(θ)

F

gy

​

=F

g

​

cos(θ)

Since motion in the y direction is constant, we know that the net force in the y direction must be 0:

F_N - F_{gy} = 0F

N

​

−F

gy

​

=0

(Note: This equation allows us to determine the magnitude of the normal force.)

In the x direction, the only force is Fgx, hence:

F_{net} = F_{gx} = F_g\sin(\theta) = mg\sin(\theta) = 0.25\times9.8\times\sin(30) = 1.23 \text{ N}F

net

​

=F

gx

​

=F

g

​

sin(θ)=mgsin(θ)=0.25×9.8×sin(30)=1.23 N

After watching the Ted Talk, there were still a few questions that I had about supermassive black holes. Firstly, I wanted to know more about the event horizon and what it exactly entails. Although the speaker briefly touched upon this subject, I would have appreciated a more in-depth explanation. Additionally, I would have liked to know more about the role of supermassive black holes in the universe.

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The efficiency of learning is a function of the total amount of brain tissue; this is the law of mass action. Brain tissue enhances the cognitive abilities.

The law of mass action states that the efficiency of a biological process, such as learning, is determined by the total quantity or mass of the participating elements or components. In the context of learning and brain function, this law suggests that the more brain tissue involved in a cognitive task, the greater the efficiency of learning.

According to the law of mass action, the presence of a larger amount of brain tissue allows for greater neural connectivity, increased synaptic activity, and enhanced information processing capabilities. More brain tissue provides a larger network of neurons that can form connections and transmit signals, leading to improved learning and cognitive abilities.

It is important to note that the law of mass action does not imply that learning is solely dependent on the quantity of brain tissue. Other factors, such as the quality of neural connections, neural plasticity, and individual differences, also contribute to the efficiency of learning. However, the law of mass action highlights the general principle that a larger amount of brain tissue can support more efficient learning processes.

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