the need for sustainable energy resources ??

Evaluate the function when d(v) = 24.

Use the quadratic formula to find v.

Where a = 0.0067, b = 0.15, and c = -24.

Therefore, the car should travel at 49.7 km/hr.

We take the positive speed as the answer.

In this case, the magnitude of the initial velocity vector is approximately 10.8 m/s and the direction of the initial velocity vector so that the chocolate bar will reach your friend moving horizontally is downward at an angle of 180 degrees.

To determine the magnitude of the initial velocity vector, we can use the fact that the chocolate bar needs to travel a horizontal distance of 8.6 m to reach the friend.

We can use the equation for horizontal distance traveled by an object with initial velocity v0 and angle θ: d = v0cos(θ)t

Since the chocolate bar is tossed, we can assume that its initial vertical velocity is zero.

Therefore, we can use the equation for vertical displacement to find the time it takes for the chocolate bar to reach the friend:

y = v0sin(θ)t - 0.5gt²

where y is the vertical displacement (which is 8.6 m in this case) and g is the acceleration due to gravity (-9.81 m/s²).

Solving for t, we get:

t = sqrt(2y/g) = sqrt(2(8.6)/9.81) ≈ 1.26 s

Now we can use the equation for horizontal distance traveled to find the initial velocity:

d = v0cos(θ)t 8.6 = v0cos(39)t

v0 = 8.6/(cos(39)t) ≈ 10.8 m/s

Therefore, the magnitude of the initial velocity vector is approximately 10.8 m/s. To determine the direction of the initial velocity vector, we can use the fact that the chocolate bar needs to travel horizontally.

This means that the vertical component of the initial velocity should be zero.

Therefore, we can use the equation for vertical velocity to find the angle θ:

v0sin(θ) = 0 θ = 0 or 180 degrees

However, we know that the chocolate bar is thrown uphill, so the initial angle cannot be 0 degrees. Therefore, the initial angle must be 180 degrees, which means the initial velocity vector must be directed downward.

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The jet stream is a narrow band of strong, high-altitude winds that flow in a westerly direction across the mid-latitudes of the Earth, generally between 30 and 60 degrees latitude in both hemispheres. The correct answer is d.

These winds can reach speeds of over 200 miles per hour and are caused by the differences in temperature and pressure between the polar and tropical regions. As the Earth rotates, the Coriolis effect causes the jet stream to follow a meandering. These waves can have a significant impact on weather patterns, as they can cause areas of high and low pressure to form, which can lead to storms, cold fronts, and other weather phenomena. Correct answer is option: d.

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Answer:

A. 1.71 m

B. 2.66 m

Explanation:

A. Determination of the height of the pier.

We'll begin by calculating the time taken for the ball to get to the water

This can be obtained as follow:

Horizontal velocity (u) = 1.27 m/s,

Horizontal distance (s) = 0.75 m

Time (t) =?

s = ut

0.75 = 1.27 × t

Divide both side by 1.27

t = 0.75 / 1.27

t = 0.59 s

Finally, we shall determine the height of the pier as follow:

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

Time (t) = 0.59 s

Height of pier (h) =?

h = ½gt²

h = ½ × 9.8 × 0.59²

h = 4.9 × 0.3481

h = 1.71 m

Thus, the height of the pier is 1.71 m

B. Determination of the horizontal distance.

Horizontal velocity (u) = 4.50 m/s

Time (t) = 0.59 s

Horizontal distance (s) =?

s = ut

s = 4.5 × 0.59

s = 2.66 m

Thus, if the ball moved at a velocity of 4.50 m/s off the pier, it will land at a distance of 2.66 m from the end of the pier.

Answer:

1. Planetary Model

2. Protons and Neutrons

Explanation:

1. planetary model is also known as quantum model, which is the model we use nowadays

2. Majority of the mass is from the total of neutrons and protons, electrons are so small that it is not included with the mass

Hope this helps

1. The atom is currently represented by the quantum mechanical model. Additionally known as the Electron cloud model.

The quantum mechanical model, developed by Erwin Schrödinger, treats electrons as matter waves.

Previously, in Bohr's model, electrons were seen as having a particle character and resided in well-defined orbits. Schrödinger interpreted electrons as matter waves after expanding on Bohr's concept.

The quantum mechanical model, or electron cloud model, is another name for it. Hence, option d is correct.

2. The mass of the proton and neutron together make up the atomic mass. Hence, option (a) is correct.

Electrons, protons, and neutrons are subatomic particles that makeup atoms. Atomic mass is expressed in terms of AMU.

JJ Thomson is credited with discovering electrons. They are negatively charged at a 1.602 x 10-19 coulomb level.

Rutherford gave the name proton to an entity that E. Goldstein had discovered. They have a 1.602 x 10-19 coulomb positive charge.

James Chadwick discovers neutrons. They have no electrical charge.

Compared to the masses of the proton and neutron, the mass of the electron is insignificant. The order of mass is neutron, proton, then electron.

Therefore, an electron's mass is very small, and an atom's mass is made up of the masses of a proton and a neutron.

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The speed of sphere C after the second collision can be found by applying the conservation of momentum in both the x and y directions. After the first collision, sphere B maintains the same velocity until it hits sphere C. By equating the initial momentum in each direction to the final momentum, we can solve for the speed of sphere C.

Let's denote the initial velocities of spheres A, B, and C as V_A, V_B, and V_C, respectively. After the first collision, sphere B maintains the same velocity until it hits sphere C.

In the x-direction, the conservation of momentum equation is:

m_A * V_A = m_B * V_B,

where m_A and m_B are the masses of spheres A and B, respectively.

In the y-direction, the conservation of momentum equation is:

m_A * 0 + m_B * 0 = m_B * V_B + m_C * V_C,

where the initial velocities in the y-direction are assumed to be zero.

Since the y-direction equation simplifies to m_B * V_B = m_C * V_C, we can substitute this expression into the x-direction equation to solve for V_C:

m_A * V_A = (m_B * m_A * V_A) / m_C.

Simplifying the equation, we find:

V_C = (m_A * V_A) / (m_A + m_B).

Therefore, the speed of sphere C after the second collision is given by (m_A * V_A) / (m_A + m_B).

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Both path integrals and Hamiltonian physics are fundamental in quantum mechanics, but they are used in different ways and for different purposes.

Path integrals, also known as the Feynman path integral formulation, is a formulation of quantum mechanics that provides a way to calculate the probability amplitude of a particle's path in space-time. It is used to calculate the probability of a particle going from one point to another in a given time and is useful for studying quantum systems with a large number of degrees of freedom.

Hamiltonian physics, on the other hand, is a formulation of classical mechanics that describes the evolution of a system in terms of its energy. In quantum mechanics, the Hamiltonian is used to describe the time evolution of a quantum system and is the operator corresponding to the total energy of the system.

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To estimate the mean EPA combined city and highway mileage (u) for the new midsize model, the automaker can employ a statistical sampling approach. They would need to collect data from a representative sample of the new midsize cars and measure their EPA combined mileage. It is important to ensure that the sample is randomly selected to avoid bias.

By calculating the mean mileage of the sample, the automaker can use it as an estimate of the population mean. However, it's important to keep in mind that the sample mean may not be exactly equal to the true population mean.

To increase the accuracy of the estimate, the automaker can aim for a larger sample size. A larger sample size tends to provide a more reliable estimate of the population mean. Statistical techniques like confidence intervals can be used to determine a range within which the true population mean is likely to lie.

It is also worth considering factors such as the variability of the mileage measurements and any potential covariates that may affect the mileage, such as engine type or driving conditions. Accounting for these factors can help improve the accuracy of the estimate.

Overall, by properly designing the sampling strategy, collecting a representative sample, and applying appropriate statistical techniques, the automaker can estimate the mean EPA combined mileage for the new midsize model with reasonable confidence.

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The correct answer is 4/19 value will be obtained for r2.

An effect size is an estimate of that number based on a sample that measures the magnitude of the association between two variables in a population. It can refer to the value of a parameter for a fictitious population, the value of a statistic generated from a sample of data, or the equation that operationalizes how statistics or parameters result in the impact size value. The correlation between two variables, the regression coefficient in a regression, the mean difference, or the likelihood that a specific event (like a heart attack) will occur are examples of effect sizes. Effect sizes are an important component of power analyses, sample size planning, and meta-analyses. They are a complement to statistical hypothesis testing.

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The coefficient of kinetic friction between the puck and the ice is 0.10

What is the coefficient of kinetic friction?

It is the ratio of the friction force to the normal force experienced by a body moving on a dry, non-smooth surface.

How to calculate the coefficient of kinetic friction?
v²-u²=2as

0-(10)²=2*a*50

a = 1m/s²

F = uN (N=mg)
ma = umg

u = a/g = 1/9.8 = 0.10

Therefore, the coefficient of kinetic friction between the puck and the ice is 0.10

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Answer:

F' = 64 N

Explanation:  

The force of gravitation between two objects is given by Newton's Law of Gravitation as follows:

\(F = \frac{Gm_{1}m_{2}}{r^2}\\\)______________ equation (1)

where,

F = Force = 16 N

G = universal gravitational constant

m₁ = mass of the first object

m₂ = mass of the second object

r = distance between objects

Now, the masses of each object are doubled and the distance between them is same:

m₁' = 2m₁

m₂' = 2m₂

r' = r

Hence, the new force will be:

\(F' = \frac{G(2m_{1})(2m_{2})}{r^2}\\\\F' = 4\frac{Gm_{1}m_{2}}{r^2}\)

using equation (1), we get:

F' = 4 F = 4(16 N)

F' = 64 N

Explanation:

You walk 53m to the north, then you turn 60° to your right and walk another 45m. Determine the direction of your displacement vector. Express your answer as an angle relative to east.

Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

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Answer:Simple, it gets used up by the phone.

Explanation:Your phone uses the energy stored in the battery to perform the functions it does. Chemical energy gets converted to light (display), sound (speakers), electrical (internal processing of the phone), thermal (phone getting heated up), and to other forms.

We can calculate the focal length of the lens as follows:1/f = 1/d₀ - 1/d₁ = 1/2940 + 1/215910 = 0.00052So,f = 1/0.00052 = 1923.08 mm . Therefore, the focal length of the projection lens is approximately 1923.08 mm.

In order to find out the focal length of the projection lens for the given LCD projector, we can use the thin lens equation which is given as follows:1/f = 1/d₀ + 1/d₁ where f = focal length of the projection lensd₀ = distance of the object from the lensd₁ = distance of the image from the lens .

Given data: Object height, h₀ = 24.2 mm Image height, h₁ = 1.78 m = 1780 mm .

Distance of the object from the lens, d₀ = 2.94 m = 2940 mm . Now, we need to calculate the distance of the image from the lens, d₁. For that, we can use the magnification formula which is given as:m = - h₁/h₀ = d₁/d₀So, we can rearrange the above formula as:d₁ = - (h₁/h₀) × d₀ = - (1780/24.2) × 2940 = - 215910 mm .

We can see that the value of d₁ comes out to be negative which means that the image is formed on the opposite side of the lens. This shows that the lens is a diverging lens. Therefore, we can calculate the focal length of the lens as follows:1/f = 1/d₀ - 1/d₁ = 1/2940 + 1/215910 = 0.00052So,f = 1/0.00052 = 1923.08 mm . Therefore, the focal length of the projection lens is approximately 1923.08 mm.

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In the case of Keplerian rotation, with all the mass concentrated at the center like in the solar system, adjusting the dark matter density sliders to zero would enclose approximately 0.0 kilograms of mass.

When we consider the concept of Keplerian rotation, we are examining a system where most of the mass is concentrated at the center, as observed in the solar system. To simulate this scenario, we adjust the dark matter density sliders to zero, effectively removing any additional mass beyond what is already present. By doing so, we eliminate the contribution of dark matter to the overall mass enclosed.

In the context of the given question, the objective is to determine the amount of mass enclosed under these conditions. When the dark matter density sliders are set to zero, it means that no additional mass is added to the system. Therefore, the total mass enclosed would be equal to the mass of the central object, which in this case is the sun.

The main answer, stating that the mass enclosed is approximately 0.0 kilograms, indicates that without the presence of dark matter, the only mass considered is that of the central object, which in the solar system is the sun. This suggests that the mass enclosed is negligible when compared to the total mass of the solar system.

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The environmental impact of the changes in the amount of energy resources is reduction in air pollution.

Energy resources are the materials that can act as sources of energy which is grouped into two namely:

From the given figures,

In 2014 renewable energy = 19%; while in 2015 it is = 25%

In 2014 non renewable energy when added = 79%; while in 2015 it is = 73%

This shows that there was reduction in the use of non renewable energy from 2014 to 2015 by 6%.

This would affect the environment positively as there would be reduction in air pollution caused by non renewable energy resources.

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Answer:

How Are Grocery Store Aisles Organized? The aisles of a grocery store are organized into categories. ... Dairy aisles are along the back not connected to but close by the meat section. This will bring you back to the front of the other side of the store where the bread and bakery area is

Answer:

Gravity is an ever present force, and therefore acceleration is guaranteed to happen at every single one of those points (and in fact, everywhere in the universe).

On top of that, friction will be present in all four spots (friction with the rails, with the air, with the axles, etc.), and friction is a perfectly acceptable force that will cause acceleration, slowing the roller coaster down.

So the correct answer is every single point, regardless of what answer the teacher expects.

The object will be moving faster if the acceleration and velocity are pointing in the same direction. The object will also slow down if the acceleration is pointing in the opposite direction as the velocity.

When an object's speed, direction of motion, or both change, it accelerates. Even while it may appear to be virtually immediate in some circumstances, such as when a golf ball is struck by a club or during car collisions, changes in an object's speed are always continuous.

Since gravity is a constant force, acceleration will unavoidably occur at each of those locations and throughout the whole universe.

Therefore, In addition, there will be friction at all four locations—friction with the axles, the air, the rails, etc.—and friction is a completely normal force that will accelerate the roller coaster, slowing it down.

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Answer:

6.67 Nm/s

Explanation:

As we know, the rate at which work is done is called power.

Power = Work done/ Time

Power = F * D / T

Where,

F = Force

D = Distance

T = Time

Given,

F = 10N

D = 20m

T = 30s

Power = 10*20/30

Power = 200/30

Power = 6.67 Nm/s

Hope it helps! :)

Answer:

6.67 watts

Explanation:

power=force × velocity

10×20÷30

=6.67 watts

Only one star will be visible. Two stars are 0.1 arcseconds apart, and you use a telescope with a 1 arcsecond angular resolution to take pictures of them.

At radio frequencies, light pollution is more severe than at visible wavelengths. To improve their effectiveness, modern telescopes employ cutting-edge technology. Another slim triangular relation, b = s/fe, provides the angle as the apparent angular size of the pictures as seen via a magnifying lens. Just 206 * (pixel size) / pixels make up the scale (focal length). If your 30 mm guide scope is f/4, then the focal length would be 120 mm. The pixel scale for a typical guide camera, such as the ASI120MM, which has 3.8u pixels, is 206 * 3.8 / 130 = 6.0 arcseconds/pixel.

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Answer: There'll be just one star to see. You use a telescope with a 1-arcsecond angular resolution to snap photos of two stars that are 0.1 arcseconds apart.

Explanation: Compared to visible wavelengths, light pollution is worse at radio frequencies. The most recent technology is used by modern telescopes to increase their efficacy. The angle is given by another thin triangle relation, b = s/fe, which also gives the apparent angular size of the images when viewed via a magnifying glass. The scale is made up of only 206 * (pixel size) / pixels (focal length). The focal length would be 120 mm if your 30 mm guide scope were to be set at f/4. The ASI120MM guiding camera, which has 3.8u pixels, has a pixel scale of 206 * 3.8 / 130, or 6.0 arcseconds/pixel.

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Answer:

it gravitional pull on earth will increased becauste it is compress to a form of moon which is comperatively smaller so the gravitonal pull on per cm of earth will incrased so we can say that there will be change in acceleration due to gravity

The acceleration of the truck is 45.5 m/s² and the velocity of the truck is 27.8 m/s.

The acceleration of the truck is calculated as follows;

F = ma

a = F/m

a = (2.685 x 10⁵)/(5900)

a = 45.5 m/s²

a = v²/r

v² = ar

v² = 45.5 x 17

v² = 773.64

v = 27.8 m/s

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Answer: The wavelength will also increase by a factor of 1.5

Explanation:

The relation between frequency, speed, and wavelength is

v=fλ       where,v=speed

                         f=frequency

                         λ =wavelength

Substituting in the new speed and the original frequency, we get:

1.5v = fλ

Dividing both sides of the equation by f, we get:

1.5v/f = λ

So, the new wavelength is 1.5 times the original wavelength.

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The difference between the new and old wavelengths is 1.5 times.

In physics, wavelength is defined as the distance between two consecutive points in a wave that are in phase, or that are identical in their displacement from the equilibrium position. In other words, the wavelength is the distance traveled by one complete cycle of a wave.

Wavelength is typically represented by the symbol λ (lambda) and is measured in meters or other units of length. It is an important parameter of waves, including electromagnetic waves such as light and radio waves, as well as mechanical waves such as sound waves.

The wavelength of a wave is related to its frequency and speed through the equation λ = v/f, where λ is the wavelength, v is the speed of the wave, and f is the frequency. This equation demonstrates that for a given speed, an increase in frequency will result in a decrease in wavelength, while a decrease in frequency will result in an increase in wavelength.

Here in the Question,

If the speed of a wave increases while the frequency remains constant, then the wavelength must also change.

The relationship between speed, frequency, and wavelength is given by the formula:

v = fλ

where v is the speed of the wave, f is its frequency, and λ is its wavelength.

If we assume the initial speed of the wave is v1 and the initial wavelength is λ1, then we can write:

v1 = fλ1

If the speed of the wave increases to 1.5 times its original speed, then the new speed v2 is given by:

v2 = 1.5 v1

Substituting this into the equation above, we get:

1.5 v1 = fλ2

where λ2 is the new wavelength.

Solving for λ2, we get:

λ2 = (1.5 v1)/f = (1.5 λ1)

Therefore, the new wavelength is 1.5 times the original wavelength.

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When an object accelerates at 4 m/s2 with a mass of 10 kg, the force acting on it is 40 N.

The definition of force is the pressure or pull put on the body. The body's size, form, and orientation can occasionally be altered by it.

In science, the concept of "force" is well defined. This level of force can be described as a push or a pull, which is perfectly appropriate. A force does not "exist in" or "contain" an object. A force from the other can exert pressure on something. The concept of a force fails to distinguish between living creatures and inanimate objects.

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The equilibrant force is equal in magnitude and opposite in direction to the resultant force.

Since the resultant force is 10 N in the positive y axis direction (North), the equilibrant force is 10 N in the negative y axis direction (South). An equilibrant force is a force that can balance or counteract the effect of other forces acting on an object.

It has the same magnitude as the resultant force, but it acts in the opposite direction, resulting in a state of equilibrium where the net force acting on the object is zero.

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Answer:

none

Explanation:

~both of them show to the nearest metre.

~millimeter has (mm) unit eg 0.7mm

0.76cm is the correct answer

bcoz after Mili metre there is centi metre so option c is correct

\(\frak{\huge{Mark \: me \: brainliest}}\)

Answer:

Yes the student is correct

Explanation:

The first law of thermodynamics states that energy can neither be created nor destroyed

The second law of thermodynamics states that the entropy (disorderliness) of an isolated system always increases

Therefore, whereby energy is not supplied to maintain the orderly oscillatory motion with constant amplitude, the amplitude of the system is bound to reduce with time that is the vibration of the system must be damped

Answer:

it is hydrogen peroxide

A relatively dense protogalactic cloud more likely to produce an elliptical galaxy than a spiral galaxy Because of High gas density cooling took faster and also stars forms  faster before gas settle into a disk .

The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form. Hence , a relatively dense protogalactic cloud more likely to produce an elliptical galaxy than a spiral galaxy

Because of High gas density cooling took faster and also stars forms  faster before gas settle into a disk . It also have low or no initial angular momentum

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