There is no such thing as negative acceleration? True or false

a)The image is attached to the question

b) The weight is 9310 N

c) The normal force is -9310 N

d) The net force is 8110 N

Let s recall that action and reaction are equal and opposite. This implies that the normal force and the weight of the object are the same in magnitude but opposite in direction. Given this, we can now answer the question as shown.

b) The weight of the car is obtained from 950 kg * 9.8 m/s^2 = 9310 N

c) The normal force on the car = -9310 N

d) The force on the car that allows it to go up the hill is the net force which is obtained from ;

9310 N - 1200 N = 8110 N

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Answer:

A

Explanation:

As u will divide the sound of air with The length which is also the alternative formula for calculating frequency

To choose a right-hand side that gives no solution, we can use the equation 6x + 4y = 20. When we compare this equation to 3x + 2y = 10, we can see that the two equations have different coefficients. Therefore, there is no solution to the system.
To choose a right-hand side that gives infinitely many solutions, we can use the equation 6x + 4y = 30. When we compare this equation to 3x + 2y = 10, we can see that the two equations have the same coefficients. Therefore, the system has infinitely many solutions.
As for the solutions to the system 3x + 2y = 10 and 6x + 4y = 30, any pair of values (x, y) that satisfies both equations would be a solution. For example, (2, 2) and (4, -1) are two possible solutions to this system.

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Answer:CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity

Explanation:

Answer:

Independent variable: method of teaching.

Dependent variable: summer sessions.

confound variable: improvement.

Explanation:

Independent variable is described as a variable that is being manipulated and changed in order to see its effect on the dependent variable. The dependent variable is directly affected by the independent variable.

The dependent variable is described as a variable that is being tested by an experimenter in particular research or experiment.

Confound variable is determined as a "third variable" in an experiment which is responsible for examining an already existing "cause-and-effect" relationship.

Answer:

some far beyond the edge of the solar system called the Oort Cloud, and some beyond Neptune in a region called the Kuiper Belt.

Explanation:

Hopefully this helps

Answer:

R = 0.75 ohms

Explanation:

Given that,

The voltage of each battery, V = 1.5 V

Current through the light bulb, I = 2 A

We need to find the resistance of the light bulb. We know that,

Ohm's law, V = IR

Where

R is the resistance of the light bulb

Put all the values,

\(R=\dfrac{V}{I}\\\\R=\dfrac{1.5}{2}\\\\R=0.75\ \Omega\)

So, the resistance of the light bulb is equal to 0.75 ohms.

Human roles in energy transition are:

By taking these steps, you can actively contribute to the energy transition and be a part of the movement toward a more sustainable and clean energy future.

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A force of 8.8 N is required to horizontally push a 6kg box across the floor with frictional force of 4N and acceleration of 0.8 \(m/s^{2}\).

We know that \(F = m*a\) ,where m = mass and a= acceleration.

When a frictional force acts, then

\(F = m*a + F_{friction}\)

Given m = 6kg

          a = 0.8 \(m/s^{2}\)

          \(F_{friction}\) = 4N

Putting these values in above equation we get F = 8.8N.

i.e. A force of 8.8 N is required to horizontally push a 6kg box across the floor with frictional force of 4N and acceleration of 0.8 \(m/s^{2}\).

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If energy is released in a chemical reaction, the order of reaction’s characteristics from start to finish are higher energy of reactants → transition state → lower energy of products

When two or more two molecules interact with each other and undergo certain chemical changes, a chemical reaction occurs. Chemical reaction results in changes in the chemical properties of the reactants.

There are two types of chemical reactions involving energy. If energy is absorbed during the reaction it is called as Endothermic reaction. If energy is released during the reaction it is called as Exothermic reaction.

Therefore, the order of reaction’s characteristics from start to finish are

Higher energy of reactants

         ↓

Transition state

         ↓

Lower energy of products

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Correct answers for the above question would be: (a) The doorknob does not experience a centripetal acceleration during the part of its motion when it moves with constant speed. (b) The doorknob experiences a tangential acceleration as it moves with constant speed over most of its path. (c) The doorknob does not have a centripetal acceleration at the moment the door is open the widest. (d) The doorknob does have a tangential acceleration at the moment the door is open the widest.

Explanation:

What is a pneumatic device?

A pneumatic device is a device that converts energy stored in compressed gas into mechanical motion. Such a device, usually an air cylinder, produces linear motion or force from compressed air pressure. The energy is usually stored in compressed air, but it can also be stored in other gases like nitrogen.

What are the uses of pneumatic devices?

Pneumatic devices are widely used in industry, transportation, and many other applications. A pneumatic door closer is a device that uses compressed air to close doors automatically. It is used in hospitals, offices, and other buildings to help keep doors closed, reducing drafts and noise.

It also helps to keep the building secure by preventing unauthorized access. A pneumatic door closer works by using a spring-loaded piston to push the door closed. When the door is opened, the spring compresses and the piston is forced out of the cylinder, storing energy. When the door is released, the piston retracts, releasing the energy and pushing the door closed. Therefore, as the doorknob moves with constant speed over most of its path, it experiences a tangential acceleration.

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The given statement " in a core-collapse supernova, outer part of the core rebounds from the inner, high-density core, destroying the entire outer part of  star. " is True. Because, In a core-collapse supernova, the outer part of star's core rebounds after it collapses inward due to the force of gravity.

This rebound creates a powerful shock wave that travels outward and collides with the outer layers of star, causing them to explode outward in a catastrophic event. The energy released in this explosion can be as much as ten times mass-energy of the Sun, making core-collapse supernovae one of the most energetic events in the universe. The high density and temperature of the inner core are not affected by the explosion .

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In order to calculate the reading R of the scale and the upward velocity v of the elevator, we can use Newton's second law of motion, The reading R of the scale is approximately 735 N, and the upward velocity v of the elevator at the end of the 3 seconds is approximately 31.62 m/s.

The reading R of the scale:

The reading on the scale is equal to the normal force exerted by the man on the scale, which is also the force exerted by the scale on the man. In this case, the normal force is equal to the weight of the man.

Weight = mass * acceleration due to gravity

Weight = 75 kg * 9.8 m/s^2

Weight ≈ 735 N

Since the scale is a spring scale, it measures the force exerted on it. Therefore, the reading R of the scale is equal to the weight of the man, which is approximately 735 N.

Finding the upward velocity v of the elevator:

The velocity, we need to determine the acceleration of the elevator during the first 3 seconds. We can use the following equation of motion:

Final velocity = Initial velocity + (acceleration * time)

Since the elevator starts from rest, the initial velocity is 0 m/s. The acceleration can be calculated using Newton's second law of motion:

Net force = mass * acceleration

Tension - Weight = mass * acceleration

8300 N - 735 N = 750 kg * acceleration

Acceleration ≈ 10.54 m/s^2

Now, we can calculate the final velocity of the elevator using the equation of motion:

Final velocity = 0 + (10.54 m/s^2 * 3 s)

Final velocity ≈ 31.62 m/s

Therefore, the reading R of the scale is approximately 735 N, and the upward velocity v of the elevator at the end of the 3 seconds is approximately 31.62 m/s.

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Solution :

Crust

In the field of geology, the crust may be defined as the outermost solid shell of a planet. It forms the topmost outer hard layer of the earth surface. Earth has three layers. They are the crust, mantle and the core.

When we go deeper and deeper inside the earth's crust, the temperature rise. In the crust, on the surface of the earth, the temperature is normal and is atmospheric. As we go deep down the core, the temperature rise and it is highest at the core where all the rock and the iron is in the form of the molten lava.

According to the Geologist, beneath the earth's crust, for every mile we go inside the temperature rises by 15 degree Fahrenheit.

Answer:

Would it be starting point?

Explanation:

When you start a sport or something, you may not be good or bad at it. However, as time goes on you are going to improve.

Idk if this helps or not buh yeah

Answer:

The force of gravity exerts a downward force. The floor exerts an upward force. Since these two forces are of equal magnitude and in opposite directions, they balance each other.

In a series-fed Hartley oscillator, if the frequency value-determining capacitance is increased, the oscillator frequency will decrease.

1. A Hartley oscillator is a type of LC oscillator that uses an inductor and two capacitors to generate an oscillating signal at a specific frequency.

2. In a series-fed Hartley oscillator, the frequency of oscillation is primarily determined by the values of the inductor (L) and the capacitors (C1 and C2).

3. The frequency of oscillation can be calculated using the formula: f = 1 / (2π√(L(C1 || C2))), where f is the frequency, π is a mathematical constant, and "||" represents the parallel combination of capacitors.

4. When the frequency value-determining capacitance is increased, it means either C1 or C2 or both capacitors are being increased.

5. Increasing the capacitance in the oscillator circuit will decrease the resonant frequency because the capacitance has an inverse relationship with the frequency.

6. As the capacitance increases, the denominator in the frequency formula becomes larger, resulting in a smaller overall value for the frequency.

7. Therefore, if the frequency value-determining capacitance is increased in a series-fed Hartley oscillator, the oscillator frequency will decrease.

8. This change in frequency can be utilized in electronic circuits where a variable capacitance element can be employed to tune the oscillator to different frequencies.

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Answer:

3.918*10^-2N

Explanation:

force=magnetic flux*current*length

force=5.41*10^-5*22.84*31.71

force=3.918*10^-2N

The wave function for a quantum particle is given by ψ(x)=A exp( −∣x∣ / a) where A and a=0.9 are constants and −[infinity] .

Answer:The given wave function for a quantum particle is ψ(x) = A exp ( −|x| / a). Here, A and a = 0.9 are constants. Given that the length of the box is L = 10 Å, the wave function must vanish outside the box, i.e., at x = ±L / 2.

Thus, ψ (±L / 2) = 0.   ψ (±L / 2) = A exp ( ±L / 2a) = 0.

Thus, ±L / 2a = ∞ ⇒ L = 2a∞/ = 2a/0.   the box's length is L = 2a/0.

The given wave function is ψ(x) = A exp ( −|x| / a)

The wave function vanishes at x = ±L/2

ψ(±L/2) = 0 ⇒ A exp (±L/2a) = 0 This means that ±L/2a = ∞ ⇒ L = 2a/0 , the length of the box is L = 2a/0.

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Part A. We are given that rock is thrown straight upwards from a bridge with an initial velocity of +35 m/s. To determine the velocity after 2 seconds we will use the following equation of motion for the velocity of a body in free fall:

Where:

Now, we plug in the values:

Now, we solve the operations:

Therefore, the velocity after 2 seconds is 15.4 m/s.

Part B. To determine the displacement we will use the following formula:

Now, we substitute the values:

Solving the operations:

Therefore, the displacement is 50.4 meters.

False. Slope can be expressed as either a fraction or a decimal. Both forms are valid and commonly used in mathematics. The choice of representation depends on the context and personal preference.

When slope is expressed as a fraction, it is in the form of rise over run. For example, a slope of 2/3 means that for every 2 units of vertical change (rise), there is 3 units of horizontal change (run). This fraction form can provide a clear visual understanding of the slope. On the other hand, slope can also be expressed as a decimal, which is the result of dividing the rise by the run. Decimal slope values are commonly used in calculations and equations. They can be more precise and convenient for certain mathematical operations. In summary, whether to express slope as a fraction or a decimal is a matter of choice and can vary based on the specific mathematical context or personal preference. Both forms are valid and serve different purposes in different situations.

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Answer:

it's gravitational potential energy would have converted to kinetic energy half way back when it's falls

The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.

According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.

Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.

Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.

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Mars has a surface gravity that is about 38% of Earth's, which would make it easier for humans to move around and perform tasks. On the other hand, Venus has a surface gravity that is about 90% of Earth's, which is closer to the gravity we are used to but may cause health problems for humans in the long term.

Mars has a very thin atmosphere, which means that its surface is exposed to extreme temperature fluctuations. The average temperature on Mars is around -80 degrees Fahrenheit, but it can reach up to 70 degrees Fahrenheit in some areas during the day. Venus, on the other hand, has a thick atmosphere that traps heat and creates a runaway greenhouse effect, leading to average temperatures of around 864 degrees Fahrenheit.

Both Mars and Venus have rocky surfaces, but their compositions are quite different. Mars has a lot of iron oxide (rust), which gives it its reddish color, while Venus has a lot of volcanic rocks and sulfuric acid in its atmosphere. This could make it more difficult to extract resources from Venus and use them to make the planet more Earthlike.

As mentioned earlier, Mars has a very thin atmosphere, which means that it has very little protection from solar radiation and is not able to retain heat very well. Venus, on the other hand, has a thick atmosphere that is mostly composed of carbon dioxide, which could potentially be used to create a greenhouse effect that would warm up the planet.

Both Mars and Venus would require a significant amount of resources and time to make them more Earthlike. Mars is closer to Earth and has been the focus of more exploration and research, which means that we have a better understanding of its characteristics and what would be required to make it more hospitable for humans. However, Venus's thick atmosphere and closer proximity to the Sun could make it a better candidate for terraforming, as it would be easier to create a greenhouse effect and warm up the planet.

Answer:

velocity relative to the ground = 2.54 m/s

Explanation:

given data

still water Vx = 2.30 m/s

across a steam Vy = 1.20 m/s

solution

we get here first velocity relative to the ground is express as

velocity = \(\sqrt{Vx^2+Vy^2}\)      ...............1

put here value and we get

velocity  = \(\sqrt{2.3^2+1.20^2}\)

velocity = 2.54 m/s

Answer:

ig d. transmits only green light.....