F=9 N, a=3 m/s², m=?

The net work done (in J) required to accelerate a 1500 kg car from 55 m/s to 65 m/s is 3127500 J

First, we shall obtain the initial kinetic energy. Details below:

KE₁ = ½mu²

= ½ × 1500 × 55²

= 41250 J

Next, we shall final kinetic energy. Details below:

KE₂ = ½mv²

= ½ × 1500 × 65²

= 3168750 J

Finally, we shall determine the net work done. Details below:

W = KE₂ - KE₁

= 3168750 - 41250

= 3127500 J

Thus, the net work done is 3127500 J

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Answer:

Acceleration is the change of velocity

Answer:

v= ir

Here, I = 0.26

R = 852

So,

v = 0.26 x 852

= 221.52 V

If R = 85.2 and I = 0.26,

V= ir

v = 0.26 x 85.2

v = 22.152.

Hope it helps.

Answer:

a = -1/10 m/s2

Explanation:

F = m*a

-10N = 100*a

a = -10/100

a = -1/10 m/s2

Answer:

-10

Explanation:

What you had to do to get this answer was first line up your force,mass,and acceleration.Then,put your 100kg on your m=,then put you -10nin your force f=,from there you have to divide than multiply because of your negative.

F=-10N

M=100kg

A=-10

Hope this helps:)

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Answer:

The object moving in a straight path is called linear or rectilinear motion.

An object is said to be in rectilinear motion if it changes its position,along a straight line path.

Explanation:

example: A car moving in a straight road.

A jet moving straight in air

Renewable resources:

A renewable resource is one that can be used repeatedly and does not run out because it is naturally replaced.

Nonrenewable resource:

A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource.

Thenks and pls mark me brainliestt :))

Answer:

Explanation:

Renewable energy is useful energy that is collected from renewable resources, which are naturally replenished on a human timescale. A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption.

Answer:

2.5m/s

Explanation:

m1=55kg

m2=25kg

Ben's velocity before collision=0m/s

Junior's velocity before collision= 8m/s

P1=m1v1+m2v2

P1=55kg(0m/s)+25kg(8m/s)

P1=200kg(m/s)

Know that the momentum before the collision = momentum after the collision

P2=(55kg+25kg)V

200kg(m/s)=(75kg)V

200kg(m/s)/75kg=V

V=2.5m/s.

It makes sense bc after they collide, their speed would slow down, and it wouldn't make sense if the momentum would be greater or less after they collide.

The most likely situation to occur if the climate changed and caused glaciers and ice caps to melt is:
D. Land masses would become smaller.

When glaciers and ice caps melt due to climate change, the water released from the melting ice flows into rivers, lakes, and eventually the oceans. This increase in water volume contributes to a rise in sea levels. As sea levels rise, low-lying coastal areas and islands may become submerged, leading to a reduction in the size of land masses.
In addition, the melting of glaciers and ice caps can cause other changes in the environment. While it might seem like the added freshwater could make the ocean water less salty, the influx of cold freshwater can actually disrupt ocean currents, which are crucial for regulating Earth's climate. As a result, certain regions may experience altered weather patterns and temperatures. However, these changes are complex and interconnected, making it difficult to predict specific outcomes, such as air temperature decrease or increased land fertility, solely based on melting ice caps and glaciers.
Overall, the most direct and likely impact of melting glaciers and ice caps on a global scale would be the reduction in land mass size due to rising sea levels.

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When a 0.20 kg ball is released from rest at a height of 30 cm above an ideal vertical spring, the spring's maximum compression is 0.22m. The spring has a 25Nm spring constant.

As a result, The ball's mass is m = 0.2 kg.

Height h = 30 cm = 0.3 m above the vertical spring

K, the spring constant, is 25 N/m.

The fact that the ball is released from rest is a given. So, u = 0

The spring's maximum compression must be determined.

As a result of equating the spring's potential energy with its applied force, we obtain 1/2 * k * x2 = m* g* h 1/2 * 25 * x2 = 0.2 * 10* 0.3 x2 = (2* 0.3 * 2)/25 x = 0.219 m 0.22 m.

As a result, the spring's maximum compression was measured at 0.22m.

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The displacement at which the kinetic energy and potential energy of a particle executing SHM will be equal when the amplitude is 3cm is 1.5cm.

The amplitude of simple harmonic motion affects the ratio of kinetic to potential energy at a specific displacement in the following way: as the amplitude increases, the ratio of kinetic to potential energy decreases. This is because the amplitude represents the maximum displacement from the equilibrium position, and as the amplitude increases, the potential energy of the particle increases, while the kinetic energy remains constant. Therefore, at a specific displacement, a particle with a larger amplitude will have a greater proportion of its energy in the form of potential energy, while a particle with a smaller amplitude will have a greater proportion of its energy in the form of kinetic energy.

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Answer:

polystyrene is a good insulater so less heat will escape from the cup and it will keep it warm.

the cup helps it become more insulated

The paragraph primarily discusses the concept of overwinding old clocks and its consequences, indicating that overwinding clocks used to be a common mistake. Here option D is the correct answer.

The paragraph explains that overwinding occurs when the mainspring is almost fully wound, but the operator continues to turn the winding key, resulting in the spring coiling too tightly or even breaking.

This suggests that overwinding was a mistake commonly made in the past when operating old-fashioned clocks. The other options, such as clocks changing over the years or clocks becoming fragile with age, are not directly addressed in the paragraph and are therefore less supported.

The option e. "time flies when you're having fun" is unrelated to the paragraph and can be disregarded as an irrelevant answer choice. Hence option D is the correct answer.

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One Newton is equal to the amount of force needed to accelerate a 1 kg mass to 1 m/sec2.

A Newton is the SI unit of force. It is named in honor of Sir Isaac Newton, the English mathematician and physicist who developed laws of classical mechanics.

The symbol for newton is N. A capital letter is used because the newton is named for a person.

One newton is equal to the amount of force needed to accelerate a 1 kg mass 1 m/sec2. This makes the newton a derived unit because its definition is based on other units.

1 N = 1 kg·m/s2

The newton comes from Newton's second law of motion, which states:

F = ma

where F is force, m is mass, and a is acceleration. Using the SI units for force, mass, and acceleration, the units of the second law become:

1 N = 1 kg⋅m/s2

A newton is not a large amount of force.

In conclusion, a newton is the amount of force that can accelerate a 1kg of mass to 1m/s2.

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Answer /The wave with frequency 100 will have its crests farther apart as its wavelength Will be more or elevated.

Explanation:

For sound waves, the velocity ‘v’ is equal to the product of wavelength (λ) and frequency (f) i.e. (v = n × λ or v/n = λ). Therefore, frequency is indirectly proportional to the wavelength.

The sound wave with frequency 100 will have its crests farther apart from each other as frequency is indirectly proportional to the wavelength. The speed of a wave is uninfluenced by variation in the frequency. Therefore, the less frequency wave will have more wavelength.

Answer:

We may have people making habitats on asteroids ... I know that humans will colonize the solar system and one day go beyond. Richard Gott has estimated that the human race could survive for another 7.8 million years, but it is not likely to ever colonize other planets.

To be sure there are many daunting challenges facing prospective space colonists such as protection from exposure to deadly radiation levels, the impact on the human body while living and working in cramped, low-gravity environments for extended periods of time and the psychological toll of isolation and confinement.

According to me we can't colonize other planets which is against humanity

The input to the power station is 5x10^9 W. This means that the power station requires an input of 5x10^9 watts to produce an electrical power output of 1.9x10^9 watts with an efficiency of 38%.

The efficiency of a power station is defined as the ratio of its output power to input power. Therefore, we can use the efficiency and the electrical power output of the power station to calculate its input power as follows:

Efficiency = Output power / Input power

Solving for input power, we get:

Input power = Output power / Efficiency

Substituting the given values, we get:

Input power = 1.9x10^9 W / 0.38

Input power = 5x10^9 W (to two significant figures)

The rest of the input power is lost as heat due to inefficiencies in the power generation process.

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As the free magnet is brought slowly approaching the magnet that is fixed, a pull toward the fixed magnet will eventually become apparent.

The region surrounding a magnet that experiences the effects of magnetism is known as the magnetic field. When describing the distribution of the magnetic force within and around a magnetic object in nature, the magnetic field is a useful tool.

Compass, motor, refrigerator magnets, railroad tracks, and modern roller coasters are all examples of objects that use magnetic force. Charges that travel across its areas feel a force. All moving charges produce a magnetic field.

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The magnitude of the horizontal acceleration of the cart is 2.5 m/s². Hence option 1 is correct.

Magnitude is defined as a numerical value, whereas intensity offers us a sense of effect. In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope.

The cart has a mass of m = 10 k g. F 1 = 30 N horizontally to the right and F 2 = 10 N at an angle of 60°C above the horizontal pushes on the cart to the left make up the forces.

FH = F1 − F2 cos60°C

FH = (30−10cos60°C) N

FH = 25N

a=FH / m

a=25 N / 10 kg

a=2.5 m/s²

Thus, the magnitude of the horizontal acceleration of the cart is 2.5 m/s². Hence option 1 is correct.

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Answer:

Models are assessed more in terms of their accuracy than their simplicity.

Scientists construct models as a means of representing complex systems or phenomena in a simplified and understandable way. Models can help to explain and predict behavior, identify relationships and patterns, and communicate information. They also serve as a tool for testing ideas and theories, and can be used to evaluate the impact of changes or interventions. By creating models, scientists can better understand complex systems and make informed decisions based on the results.

False. A model of the atom and a model for light are related because light is produced as a result of interactions between electrons and photons in atoms. The models for these two phenomena must be consistent in order to accurately predict and understand their behavior.

False. The emission of light is often related to the motion of electrons in atoms. For example, in certain conditions, electrons can be excited from lower to higher energy levels, releasing photons of light in the process.

a. particle model

d. wave model

A 0.842g sample of Hydrogen-3 decays to 0.0526g. Approximately 4.206 half-lives have occurred.

To determine the number of half-lives that have occurred, we can use the decay equation and the concept of exponential decay. The decay equation for radioactive decay is given by:

N(t) = N₀ * (1/2)^(t/T),\((1/2)^(^t^/^T^),\)

where N(t) is the remaining amount of the substance at time t, N₀ is the initial amount, t is the time elapsed, and T is the half-life of the substance.

In this case, we have an initial mass of 0.842g (N₀) and a remaining mass of 0.0526g (N(t)). We can set up the equation as follows:

0.0526g = 0.842g \(* (1/2)^(^t^/^1^2^.^3^2)\),

where t represents the number of half-lives that have occurred.

To solve for t, we can take the logarithm of both sides of the equation:

log(0.0526g/0.842g) = log\([(1/2)^(^t^/^1^2^.^3^2^)\)].

Using the logarithmic property log(\(a^b\)) = b*log(a), we can rewrite the equation as:

log(0.0526g/0.842g) = (t/12.32) * log(1/2).

Simplifying further:

log(0.0526g/0.842g) = (t/12.32) * (-log2),

where log2 is the logarithm base 2.

Now, we can solve for t:

t = (12.32 * log(0.0526g/0.842g)) / (-log2).

Using the given values and performing the calculation, we find:

t ≈ 4.206.

Therefore, approximately 4.206 half-lives have occurred.

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It would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

1. The decay rate of a radioactive isotope is proportional to the number of radioactive atoms present in the sample at any given time.

2. The decay rate can be expressed as a function of time using the formula: R(t) = R₀ * \(e^{(-\lambda t\)), where R(t) is the decay rate at time t, R₀ is the initial decay rate, λ is the decay constant, and e is the base of the natural logarithm.

3. The half-life of a radioactive isotope is the time it takes for half of the radioactive atoms in a sample to decay. In this case, the half-life is given as 210 days.

4. Using the half-life, we can find the decay constant (λ) using the formula: λ = ln(2) / T₁/₂, where ln(2) is the natural logarithm of 2 and T₁/₂ is the half-life.

5. Substituting the given half-life into the formula, we have: λ = ln(2) / 210.

6. Now, we need to find the time it takes for the decay rate to fall to 0.58 of its initial rate. Let's call this time "t".

7. Using the formula for the decay rate, we can write: 0.58 * R₀ = R₀ * e^(-λt).

8. Simplifying the equation, we get: 0.58 = \(e^{(-\lambda t\)).

9. Taking the natural logarithm of both sides, we have: ln(0.58) = -λt.

10. Substituting the value of λ from step 5, we get: ln(0.58) = -(ln(2) / 210) * t.

11. Solving for t, we have: t = (ln(0.58) * 210) / ln(2).

12. Evaluating the expression, we find: t ≈ 546.

13. Therefore, it would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

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P=F/A

A=F/P

P = 0.1 atm = 10132.5 Pa

A=4 x 10⁵/10132.5

A=39.477 m²

for one wing=39.477 : 2 = 19.739 m²

Answer: Economists measure the gross domestic product to see how much economic activity there is in a particular country.

Explanation:

Answer:

False

Explanation:

Answer:

Answer choices

Accuracy in the measurements

Significant digits in the measurements

Precision in the measurements

Answer:

Work done by the cable= 393176Joules

While work done by force of gravity is =-393176J

Explanation:

See attached file for calculation

Answer: 1.348 meters

Explanation: Although the sign is missing from the location of the 4.00 kg object, it is assumed to be positive. The net moment of all the objects about the center of mass must be zero. Let the center of mass be on the y axis at a point  c . Adding the four moments together, we get:

(2.00)(3.00−c)+(3.00)(2.50−c)+(2.50)(0−c)+(4.00)(0.500−c)=0

6.00−2.00c+7.50−3.00c+0−2.50c+2.00−4.00c=0

11.5c=15.50

c=  1.348 metres

The center of mass is on the y axis at  y  = 1.348 metres.

Answer: x=14

Explanation:

there is 90° in a right angle so

(4x)+(2x+6) =90

collect like terms

6x+6=90

 -6 from both sides

6x=84

 ÷6

x=14