how many 20n brciks should you add to increase the friction force on a car by 80n if the coefficient of friction is0.8

The number of parking spaces that the parking lot has, given the length of the parking lot, is 32 parking spaces.

To find out how many parking spaces the parking lot has, first we need to determine the total length of the row where parking spaces will be created.

Length of the row for parking spaces = Total length of the parking lot - Length not painted for cars to turn

= 316 feet - 28 feet = 288 feet

Now that we know the length of the row for parking spaces, we can calculate how many 9-foot-wide spaces will fit in this row.

Number of parking spaces = Length of the row for parking spaces / Width of each parking space

= 288 feet / 9 feet = 32 parking spaces

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The kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.

Kinetic energy is simply a form of energy a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given the data in the question;

To determine the kinetic energy of the train, we substitute our given values into the above expression.

K = (1/2)mv²

K = (1/2) × 600kg × (50m/s)²

K = 0.5 × 600kg × 2500m²/s²

K = 750000kgm²/s²

K = 7.5 × 10⁵J

Therefore, the kinetic energy of the moving express train with the given value of mass and velocity is 7.5 × 10⁵Joules.

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The root-mean-square speed of W\(F_{6}\) is compared to that of \(H_{2}\) at 300 K to determine the difference in their speeds. The ratio of their speeds can be calculated using the formula for root-mean-square speed.

The root-mean-square speed of a gas molecule is given by the equation v = sqrt(3RT/M), where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas. To compare the speeds of W\(F_{6}\) and \(H_{2}\), we need to calculate the ratio of their root-mean-square speeds.

First, we calculate the root-mean-square speed of WF6 using the given molar mass of WF6. Then, we calculate the root-mean-square speed of H2 using the molar mass of H2. The ratio of their speeds can be found by dividing the root-mean-square speed of WF6 by the root-mean-square speed of H2.

By substituting the given values and performing the calculations, we can determine how much slower the root-mean-square speed of WF6 is compared to H2 at 300 K. The ratio of their speeds indicates the relative difference in their velocities at the given temperature.

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False. The coefficient of performance (COP) of a refrigerator represents the ratio of the amount of heat removed from the refrigerated space to the amount of work supplied.

It is given by COP = Qc/W, where Qc is the heat removed and W is the work supplied. A higher COP indicates a more efficient refrigerator, as it removes more heat for a given amount of work. Therefore, the COP does not represent the amount of heat removed per unit of work supplied, but rather the efficiency of the refrigerator in removing heat from the refrigerated space. The coefficient of performance (COP) of a refrigerator represents the ratio of the amount of heat removed from the refrigerated space to the amount of work supplied.

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Answer:

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Answer:

A. 4.5 x 10^-5 kg.m2

B. 108 x 10^-3 kg.m2

C. 54 x 10^-5

Explanation:

A. I = m(r^2)

point mass m = 0.005 g = 5 x 10^-6 kg

I = (5 x 10^-6 kg) x (3 m)^2 = (5 x 10^-6 kg) x 9 m^2 = 4.5 x 10^-5 kg.m2

B. I = m(r^2)

point mass m = 0.3 kg = 3 x 10^-1 kg

I = (3 x 10^-1 kg) x (0.6 m)^2 = (3 x 10^-1 kg) x 0.36 m^2 = 108 x 10^-3 kg.m2

C. KE = 1/2I(w^2)

KE = 1/2(3 x 10^-2 kg.m^2)(0.6 rad/s)^2 = 54 x 10^-5

The statement, "The Voyager 1 space probe can't change its own motion" is correct and true. The Voyager 1 space probe was launched by NASA in 1977, and since then it has traveled over 14 billion miles away from Earth. It's the most distant spacecraft from Earth.

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Answer:

No. The size of the particles in the substance remains the same when the state of matter changes.

Explanation:

this is the exact answer

The resulting utility function after the monotonic transformation is\(z = x1^0.1 * x2^0.9\). This transformation changes the original utility function by reducing the emphasis on the x1 term and increasing the emphasis on the x2 term.

The exponent values determine the relative importance of each variable in the utility function.

When we apply the monotonic transformation \(z = u^1/10\) to the Cobb-Douglas utility function\(u = x1^1.0 * x2^9.0\), we are raising the utility function to the power of 1/10. This results in the following transformation:

\(z = (x1^1.0 * x2^9.0)^1/10\)

To simplify this, we can distribute the exponent across the terms:

\(z = x1^(1.0/10) * x2^(9.0/10)\)
Simplifying further, we can calculate the exponents:

\(z = x1^0.1 * x2^0.9\)

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The strength of the magnetic field in the first scenario is approximately 2.56 × 1\(0^{-5}\) Tesla (T). The magnitude of the magnetic force exerted on particle q2 is approximately 1.32 × 1\(0^{-2}\) Newtons (N).

To calculate the strength of the magnetic field in the first scenario, we can use the formula for magnetic force:

F = q1 * v * B

Where F is the magnetic force, q1 is the charge of the particle, v is the velocity, and B is the strength of the magnetic field.

Rearranging the formula to solve for B, we have:

B = F / (q1 * v)

Substituting the given values, we have:

B = (5.75 × 1\(0^{-3}\) N) / (2.7 × 1\(0^{-6}\)  C * 773 m/s)

B = 2.56 × 1\(0^{-5}\)  T

Therefore, the strength of the magnetic field in the first scenario is approximately 2.56 × 1\(0^{-5}\) Tesla (T).

In the second scenario, to calculate the magnitude of the magnetic force exerted on particle q2, we can use the same formula:

F = q2 * v * B

Substituting the given values, we have:

F = (42.0 × 1\(0^{-6}\) C) * (1.21 × 1\(0^{3}\) m/s) * (2.56 × 1\(0^{-5}\)  T)

F = 1.32 × 1\(0^{-2}\) N

Therefore, the magnitude of the magnetic force exerted on particle q2 is approximately 1.32 × 1\(0^{-2}\)  Newtons (N).

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Answer:

Explanation:

For every action (or force), there is an equal and opposite action (or force).

Answer:

Average speed = 0.24 km/min.

Average velocity = 0.2 km/min.

Explanation:

Finding average velocity :

Finding average speed :

Nonsense mutations are those point mutations in the DNA where stop codons will appear before the time they should appear.

At the time of transcribing from DNA to RNA, the template needs to have both start and stop codons for the transcription to occur correctly, but sometimes mutations can occur that do not allow the protein to be produced correctly. This mutation can be permanent which causes damage to the formation of proteins.Sometimes mutations can be beneficial, allowing evolution and helping organisms to be better formed for a new environment.

It is the type of mutation in which a termination codon occurs before the time it should be, instead of giving a codon with a certain amino acid. Which gives a much shorter protein than it should be, giving a non-functional protein.

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Answer:

B. The dentist uses X-ray radiography, which takes too short a time to cause those problems.

Explanation:

The statement B would best inform Sally of the level of risk. The dentist uses X-ray radiography, which takes too short a time to cause those problems and risk.

X-ray imaging provides images of human internal organs. The photos depict your body parts in various colors of black and white.

Because various tissues absorb varying quantities of radiation, this is the case. Because calcium absorbs the most x-rays, bones appear white.

When X-ray radiation passes into our bodies, it damages molecular structures and may cause injury.

Human cells are damaged by extremely high doses of radiation, as indicated by skin burns, hair loss, and an increased risk of cancer.

Sally is concerned about the X-ray images her dentist plans to take of her teeth. She has read that X-rays can cause tissue effects, such as skin reddening and hair loss.

The statement B would best inform Sally about the level of risk. The dentist uses X-ray radiography, which takes too short a time to cause those problems and risk.

Hence, statement B would best inform Sally about the level of risk.

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The reciprocal of Hubble's constant for the balloon represents the age of the balloon since it started expanding.

Hubble's constant (H₀) is a measure of the expansion rate of the universe.

When we find the reciprocal of Hubble's constant (1/H₀), it gives us the time it took for the universe (or in this case, the balloon) to expand from a single point to its current size, assuming a constant expansion rate. In this context, the reciprocal of Hubble's constant represents the age of the balloon since the expansion began.
The reciprocal of Hubble's constant, when applied to the balloon, provides significant information about the age of the balloon and its expansion history, assuming a constant rate of expansion.

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Increasing the distance between the objects

here's the Answer :

=》Increasing the distance between the objects.

since, gravitational force is inversely proportional to the distance between the objects, so if the distance increases the force will decrease.

\(gravitational \: force \: \: \dfrac{1}{ \alpha } \: \: distance\)

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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The energy required to accelerate a particle to speeds of 0.5c, 0.9c, and 0.99c can be calculated as 1.15E₀, 2.29E₀, and 7.08E₀, respectively, where E₀ represents the rest energy of the particle.

Einstein's mass-energy equivalence states that the total energy (E) of an object is equal to its mass (m) multiplied by the speed of light (c) squared, E = mc². To calculate the energy required to accelerate a particle to a specific speed, we need to consider the relativistic effects.

To express the energy in terms of the rest energy (E₀), we divide the total energy (E) by mc², resulting in E/E₀. Thus, for speeds of 0.5c, 0.9c, and 0.99c, we can calculate the energy required as follows:

a) For a speed of 0.5c:

  E/E₀ = (mc²)/(mc²) = 1E₀

  The energy required is equal to the rest energy.

b) For a speed of 0.9c:

  E/E₀ = γmc²/mc² = γ = 1/(1 - v²/c²)^(1/2)

  Here, v = 0.9c, so γ = 2.29

  The energy required is 2.29E₀.

c) For a speed of 0.99c:

  E/E₀ = γmc²/mc² = γ = 1/(1 - v²/c²)^(1/2)

  Here, v = 0.99c, so γ = 7.08

  The energy required is 7.08E₀.

Therefore, the energy required to accelerate a particle to speeds of 0.5c, 0.9c, and 0.99c is 1.15E₀, 2.29E₀, and 7.08E₀, respectively, where E₀ represents the rest energy of the particle.

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Option B.  The temperature change for Cu will be 10-fold higher than that for water. Is true bout the change in temperature.

Heat capacity or thermal capability is a physical property relying on, described as the amount of heat to be provided to an object to produce a unit trade in its temperature. The SI unit of heat ability is joule in line with kelvin. warmth capability is an extensive belonging.

Heat capacity or specific warmth is the quantity of warmth in step with unit mass that is required to raise the temperature through 1°C. particular heat is helpful in determining the processing temperatures and quantity of warmth necessary for processing and can be useful in differentiating among polymeric composites.

The Specific heat ability of a substance is usually determined consistent with the definition; namely, by means of measuring the heating capacity of a sample of the substance, generally with a calorimeter, and dividing via the pattern's mass .

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Disclaimer:- your question is incomplete, please see below for the complete question.

Water has a heat capacity that is approximately ten times larger than the heat capacity of copper metal. Assuming 100 j of energy is deposited into equal masses of the two materials as heat energy, what is true about the change in temperature?.

A. The answer cannot be determined without knowing the actual masses of the two materials.

B. The temperature change for Cu will be 10-fold higher than that for water.

C. The temperature change for water will be 10-fold higher than that for Cu.

D. The temperature changes will be the same since each receives the same amount of heat.

E. The answer cannot be determined without knowing the initial temperatures of the two materials.

Answer:

Capacitance is the ratio of the charge to the potential difference. How is the charge stored on a capacitor related to the capacitance of the capacitor and the potential difference across the capacitor? The charge equals the product of the capacitance and the potential difference.

Explanation:

Hope this helps

Answer:

states that the acceleration of an object increases with increased force and decreases with increased mass. ... Notice how mass and force affect acceleration. Newton's second law. The acceleration of an object increases with increased force, decreases with increased mass, and is in the same direction as the force.

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Answer:

a prism?

Explanation:

triangle prism divides the light into different places and turns into colored or white light

Inductor 1 stores the same amount of energy as inductor 2, although its inductance is only half the inductance of inductor 2. What is the ratio i1/i2 of the currents in the two inductors?

To answer this question, we'll use the formula for the energy stored in an inductor, which is:

Energy (E) = (1/2) * L * I², where L is the inductance, and I is the current.

Since both inductors store the same amount of energy, we have:

(1/2) * L1 * I1² = (1/2) * L₂ * I₂²

Given that the inductance of inductor 1 (L1) is half the inductance of inductor 2 (L₂ ), we can substitute L1 with (1/2) * L₂ :

(1/2) * (1/2) * L₂  * I₁² = (1/2) * L₂ * I₂²

Now, we can simplify the equation and find the ratio, i₁/i₂,:

I₁² / I₂²= 1

Taking the square root of both sides:

i₁/ i= 1

So, the ratio of the currents in the two inductors, i₁/i₂, is 1.

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Answer:

1) C. 2.5 x 10⁴ Pa

2) C. 75 cm³

Explanation:

Question 1.

Given the following data;

To find the final pressure, P2, we would use Boyle's law;

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

PV = K

P1V1 = P2V2

Making P2 the subject of formula, we have;

P2 = (P1V1)/V2

Substituting into the formula, we have;

P2 = (1 * 10⁵ * 5)/20

P2 = (500,000)/20

Final pressure, P2 = 25,000 Pa or 2.5 x 10⁴ Pa.

Question 2.

Given the following data;

To find the final volume, we would use Boyle's law;

Mathematically, Boyles law is given by;

PV = K

P1V1 = P2V2

Making V2 the subject of formula, we have;

V2 = (P1V1)/P2

Substituting into the formula, we have;

V2 = (190 * 30)/76

V2 = 5700/76

Final volume, V2 = 75 cm³

Answer: C. Write the negative ion first

Explanation:

Answer:

C.) on edge

Explanation:

The efficiency of a heat engine is the ratio of the work done by the engine to the heat input. So, if the efficiency of the heat engine is 60.0%, then 60.0% of the heat input is converted into work, and the remaining 40.0% is released into the environment.

Let's say that the heat engine takes in 100 J of heat. Then, 60.0 J of this heat is converted into work, and 40.0 J is released into the environment.

Therefore, the heat engine takes in 100 J of heat to produce 60.0 J of work.

Here is the formula for calculating the efficiency of a heat engine:

efficiency = work / heat input

In this case, the efficiency is 60.0%, the work is 60.0 J, and the heat input is 100 J. So, we can plug these values into the formula to get:

efficiency = 60.0 J / 100 J = 0.60

This means that the heat engine is 60.0% efficient.

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Answer:

the cart will have an acceleration of 1,25 m.s‐²

Answer:

  170 N

Explanation:

Impulse is the change in momentum. Momentum is the product of mass and velocity. These are related to applied force by ...

  F·Δt = m·Δv

__

Here, the velocity goes from 0 to 34 m/s in 0.0116 s. The mass is 0.058 kg. Filling in the given values, we have ...

  F(0.0116 s) = (0.058 kg)(34 m/s)

  F = 0.058×34/0.0116 kg·m/s² ≈ 170 N

The required force is 170 newtons.

Rods play key role in dark adaptation and detect gray, black and white. : true.

Rods are photoreceptor cells in the retina of eye that are specialized for low-light vision and they contain a photopigment called rhodopsin, which is sensitive to light and helps in seeing in dimly lit environments.

In dark conditions, rods become highly sensitive, allowing to see even in very low light levels and this is known as dark adaptation. It takes about 30 minutes for the rods to fully adapt to the dark. As the light levels increase, sensitivity of the rods decreases and cones takes over as the primary source of visual input.

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Answer:

Whenever energy gets transformed, the total

energy remains unchanged. This is the law of

conservation of energy. According to this law,

energy can only be converted from one form

to another; it can neither be created nor

destroyed. The total energy before and after

the transformation remains the same.