A car accelerates steadily from rest to 30m/s in a distance D and time T another car takes 3T to accelerate from stationary to the same final velocity. what distance does the second car cover during the new acceleration?

The time taken for the car to drive directly north is 8.52 seconds.

v = u + at

v = u + a cosθ(t)

v = 17.9 + 2.88cos(137.7)t

v = 17.9 - 2.1t

when the car is directly north, v = 0

0 =  17.9 - 2.1t

2.1t = 17.9

t = 17.9/2.1

t = 8.52 seconds

Thus, the time taken for the car to drive directly north is 8.52 seconds.

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Answer:

33 Celsius is 306.15 in absolute temperature

Answer:

A

Explanation:

this is because the law of reflection states that the angle of incidence equals to the angle of the reflection.

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Answer:

1.- para cubrir la superficie lateral 4.32 metros²

2.- Area de la base  2.15 metros²

3.- Volumen 1 m³

4.- Area total 6.47 metros²

Explanation:

El área lateral sera calcular el area de seis triangulos iguales cuya base es

0.80 de base x 6 lados = 4.80 metros perimetro de la base

4.80 perimetro de base x 1.80 arista lateral / 2 = 4.32m2

Area de la base:

Perímetro x Apotema / 2

Siendo la Apotema la altura de los triangulos que componen un hexagono calculada utilizando el teorema de pitágoras:

\(\sqrt{0.8^2 + (0.8/2)^2} = Apotema\)

Apotema = 0.894427191

Area: 4.80 x 0.894427191 / 2 = 2.146625258

sumando el area de la base mas el area lateral se obtiene el area total

2.15 + 4.32 = 6.47 metros

Volumen de la pirámide:

Area de la Base x Altura / 3

2.15 x 1.40 / 3 = 1.00333 m3

Answer:

hope this help pls give me brainless

The speed of the volleyball with a mass of 0.28 kg and height of 12 m will be 15.336 m/s.

Speed is the rate of change of distance of an object with respect to time. Speed is a scalar quantity as it has only magnitude and no direction. The SI unit of speed is meter per second (m/s).

PE = KE

Potential Energy = Kinetic energy

mgh = 1/2 mv²

where, m is the mass of object,

g is the acceleration due to gravity,

h is the height of the object,

v is the speed of the object

gh = 1/2v²

2gh = v²

v = \(\sqrt{2gh}\)

v = \(\sqrt{2(9.8)(12)}\)

v = \(\sqrt{235.2}\)

v = 15.336 m/s

Therefore, the speed of the volleyball will be 15.336 m/s.

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Answer:

both magnesium and strontium have 2 valence electrons

Explanation:

potassium has 8 valence electrons, and nitrogen has 5.

Explanation:

lighting converts heat energy.

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The younger girl should sit at a distance of 1.5 times the distance from the bag of apples to the pivot.

To balance the see-saw, the torques on both sides of the pivot must be equal. The torque is calculated by multiplying the force applied by the perpendicular distance from the pivot. In this scenario, the torque due to the older girl is 500 N multiplied by her distance from the pivot, which is represented as 'x'. The torque due to the younger girl and the bag of apples is the sum of their weights (250 N + 50 N = 300 N) multiplied by their distance from the pivot, represented as 'd'. By setting up and simplifying the torque equation, it can be determined that the younger girl should sit at a distance of 1.5 times 'd' to balance the see-saw. This ensures that the torques on both sides are equal and the see-saw remains in equilibrium.

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The frequency domain graph of the periodic composite signal consists of two peaks, one at 100 Hz with an amplitude of 20 V and another at an unknown frequency with an amplitude of 5 V.

In the frequency domain, the composite signal can be represented by a graph showing the amplitude of each frequency component present in the signal. In this case, the signal is composed of two sine waves. The first sine wave has a frequency of 100 Hz and a maximum amplitude of 20 V. This means that in the frequency domain graph, there will be a peak at 100 Hz with an amplitude of 20 V.

The second sine wave's frequency is not given, but we know that it has a maximum amplitude of 5 V. Therefore, there will be another peak in the frequency domain graph at an unknown frequency with an amplitude of 5 V.

Since the bandwidth of the composite signal is 2000 Hz, the frequency domain graph will span a range of frequencies from 0 Hz to 2000 Hz. Apart from the two peaks mentioned above, there will be no other significant frequency components in the graph.

To summarize, the frequency domain graph of the periodic composite signal will have two peaks—one at 100 Hz with an amplitude of 20 V, and another at an unknown frequency with an amplitude of 5 V.

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The longest rotation period of the wheel that will prevent the riders from falling off at the top is determined by the formula Fc = Fg, where Fc is the centripetal force and Fg is the force of gravity.

First, we need to determine the centripetal force (Fc) using the formula Fc = mv^2/r, where m is the mass of the rider, v is the velocity of the wheel, and r is the radius of the wheel.

Next, we need to determine the force of gravity (Fg) using the formula Fg = mg, where m is the mass of the rider and g is the acceleration due to gravity.

Once we have determined both Fc and Fg, we can set them equal to each other and solve for the velocity (v) of the wheel.

Fc = Fg
mv^2/r = mg
v^2 = rg
v = sqrt(rg)

Finally, we can use the formula T = 2πr/v to determine the longest rotation period (T) of the wheel, where r is the radius of the wheel and v is the velocity of the wheel.

T = 2πr/sqrt(rg)

Therefore, the longest rotation period of the wheel that will prevent the riders from falling off at the top is T = 2πr/sqrt(rg).

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The effect of the distance of a launcher affects the speed of a car in that an optimum distance is desirable for optimal performance.

If the distance is too small the speed of the car will be minimal, also of the distance is too large, the speed of the car will be small also.

Hence, the speed is optima only when we have an optima distance in between.

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The concept of the pendulum is used in pendulum clocks to keep time. The pendulum swings back and forth in a continuous motion at a fixed rate that is determined by the length of the pendulum and the force of gravity.

This motion is used to regulate the movement of the clock's gears, which control the hands on the clock face.The mechanism of a pendulum clock is such that when the pendulum swings in one direction, it pushes a toothed wheel or gear, which in turn moves the other gears, causing the clock's hands to move forward.

When the pendulum swings back in the opposite direction, it again pushes the gear, causing the hands to move further forward. This cycle continues, with each swing of the pendulum causing the hands to move forward by a set amount. The length of the pendulum determines the rate at which the hands move forward, with longer pendulums causing the hands to move more slowly.

In a pendulum clock, the pendulum swings back and forth in a continuous motion at a fixed rate that is determined by the length of the pendulum and the force of gravity. This motion is used to regulate the movement of the clock's gears, which control the hands on the clock face. The pendulum clock is an improvement on the original verge escapement clocks, which were prone to errors due to the uneven force of the mainspring.The pendulum is a simple yet effective device that can keep accurate time. Its motion is governed by the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred from one form to another.

When the pendulum is pulled to one side and released, it swings back and forth, converting potential energy into kinetic energy and back again. The period of the pendulum, or the time it takes to complete one full swing, is determined by the length of the pendulum and the force of gravity. By adjusting the length of the pendulum, the rate at which it swings can be altered, allowing it to keep accurate time.

To keep the pendulum clock running accurately, it needs to be adjusted periodically. This is done by altering the length of the pendulum, either by moving a weight up or down along the pendulum rod or by turning a screw at the bottom of the pendulum bob. This alters the period of the pendulum, which in turn changes the rate at which the clock runs.

The pendulum clock is a testament to the ingenuity of humanity. By using the simple yet effective concept of the pendulum, clockmakers were able to create accurate timepieces that revolutionized the way we keep time. Today, the pendulum clock may have been superseded by more advanced technologies, but its legacy lives on in the modern clocks and watches we use every day.

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Answer:

W = 90 J

Explanation:

Data:

Use the formula:

Replace and solve:

The work done was 90 Joules.

Greetings.

The strength of the electric force depends on the amount of charge on each object and the distance between them. Electric force, also known as Coulombic force, is a fundamental force of nature that is responsible for the interaction between charged particles. It is a long-range force that can be either attractive or repulsive depending on the charges of the particles involved.

The electric force between stationary charged objects is a force that arises due to the presence of an electric charge. When two or more stationary charged objects are in close proximity to one another, the electric force between them will cause them to attract or repel one another depending on their charges. Like charges repel each other, while opposite charges attract each other. The electric force between two stationary charged objects can be calculated using Coulomb's Law. According to Coulomb's Law, the magnitude of the electric force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the formula for Coulomb's Law is given as F = k * q1 * q2 / r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

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Answer:

I thick it's ccc not for sure

Answer:

Force = 19.62 Newton

Explanation:

Given the following data;

Mass = 2kg

Acceleration = 9.81 m/s²

To find the force;

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

Substituting into the formula, we have;

Force = 2 * 9.81

Force = 19.62 Newton

The correct answer is option 1: higher frequency.

The tone you hear when blowing across the opening of a partially filled two-liter soda pop bottle is caused by the air inside the bottle vibrating at a certain frequency. When you take a sip of the pop, you are changing the level of liquid inside the bottle, which in turn changes the amount of air inside the bottle. This change in air volume can affect the frequency of the tone you hear. In general, when you take a sip of the pop and blow across the opening again, the tone you hear will have a higher frequency because there is less air inside the bottle and it is vibrating at a higher rate.

In general, a shorter air column causes the sound wave produced to have a higher frequency. This is due to the fact that the wave can complete more cycles with a shorter length, producing more oscillations per unit of time.

As a result, the tone you hear when you take a sip of the pop and blow over the opening once again will have a greater frequency than previously. A higher-pitched tone results from the volume change because it shortens the air column, which changes the resonance frequency.

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Answer:

Before handling money.

Explanation:

Answer:

before handling money

Explanation:

germs are involved with all of the others. you don't have the germs on you that money has before you touch it.

The tangential component of the acceleration vector is, a_t = 1 and normal of the acceleration vector are both equal to 1.

First, we take the second derivative of r(t) to find the acceleration vector,

r''(t) = -sin(t)i + cos(t)j + k

Next, we find the tangential component of the acceleration vector by projecting it onto the unit tangent vector.

aT = r''(t) dot T / ||T||

where T is the unit tangent vector given by,

T = r'(t) / ||r'(t)||

We can simplify this expression by noting that r'(t) = -sin(t)i + cos(t)j, so ||r'(t)|| = 1, and therefore:

T = (-sin(t)i + cos(t)j) / sqrt(sin^2(t) + cos^2(t)) = -sin(t)i + cos(t)

Substituting this into the formula for aT gives:

aT = r''(t) dot T = (-sin(t))(-sin(t)) + (cos(t))(cos(t)) = sin^2(t) + cos^2(t) = 1

So the tangential component of the acceleration vector is simply aT = 1.

To find the normal component,

aN = ||r''(t) - aT * T||

Substituting in the values we found for r''(t) and T,

aN = ||(-sin(t)i + cos(t)j + k) - (1)(-sin(t)i + cos(t)j)||

= ||k|| = 1

So the normal component of the acceleration vector is aN = 1.

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The characteristics of the thermal heating mechanisms allow to find the correct answer for how snow prevents soil heating is:

         b) Snow reflecting solar radiation.

The heating of the system occurs by absorption of energy by three basic mechanisms:

In this case, the snow receives electromagnetism waves from the sun, a large part of these waves are reflected by the snow, therefore they do not reach the ground and cannot be absorbed, thus decreasing its heating.

Let's analyze the claims:

a) False. Greenhouse gases do not interfere with snow on the ground.

b) True. This mechanism reduces radiation heating.

c) False. The heat that comes from the equator warms the air.

d) False. Heating by the Earth's core occurs everywhere and comes from the center of the earth, so it does not interact with snow.

In conclusion, with the characteristics of the thermal heating mechanisms, we can find the correct answer for how snow prevents soil heating is:

         b)  Snow reflecting solar radiation

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Answer:

radiation!

Explanation:

Answer: Radiation is the thermal transmission of heat energy across space.

Explanation:

As the plates of the capacitor are moved farther apart, the potential difference between them will increase.

The increase in the potential difference is because the charge on the plates of the capacitor is fixed and does not change as the plates are moved apart. The potential difference between the plates is defined as the work done in moving a unit positive charge from one plate to the other, against the electric field.

The electric field between the plates is inversely proportional to the distance between them. Therefore, as the plates are moved apart, the electric field weakens, and the potential difference between the plates increases, following the equation V = Ed, where V is the potential difference, E is the electric field, and d is the distance between the plates.

In conclusion, moving the plates of a charged capacitor farther apart increases the potential difference between them, without affecting the amount of charge stored on the plates.

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Answer:

FeCl2 has a high melting point.

Explanation:

The magnitude of acceleration of the charged plastic bead can be calculated by using Coulomb's Law which  is -6.21 m/s^2.

According to Coulomb's Law, the force between two charged particles is given by the equation

F = k*(q1*q2)/(r^2), where k is the Coulomb's constant, q1 and q2 are the charges of the two particles, and r is the distance between the two particles.

In this case, k = 8.99 x 10^9 Nm^2/C^2, q1 = -4.0 nC, q2 = 8.0 nC, and r = 2.4 cm.

Using the equation, the magnitude of the force between the two particles is calculated as F = 8.99 x 10^9 x (-4.0 x 10^-9)(8.0 x 10^-9) / (2.4 x 10^-2)^2 = -14.9N.

The acceleration of the plastic bead can then be calculated using Newton's Second Law of Motion

F = ma.

Therefore, a = F/m, where m is the mass of the bead. In this case, the mass of the plastic bead is 2.4 g.

So, the magnitude of acceleration of the plastic bead is a = -14.9N/2.4g = -6.21 m/s^2.

Therefore, the magnitude of acceleration of the plastic bead is -6.21 m/s^2.

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The linear speed of the clothes as a spin in the barrel is 102.1 m/s.

The linear speed of the clothes is the measure of the change of displacement of the clothes with time.

Mathematically, the formula for linear speed is given as;

v = ωr

where;

The angular speed of the wash machine is given as;

ω = 1950 rpm = 1950 rev/min x 2π rad/rev x 1 min/60 s = 204.2 rad/s

v = 204.2 rad/s x 0.5 m

v = 102.1 m/s

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The goal of the lab is to investigate the relationship between density and buoyancy. The lab aims to determine how different objects or substances behave in fluids and understand the principles of density and buoyancy through experimental observations and calculations.

The goal of the lab or the question being addressed in the lab report is to investigate and understand the concepts of density and buoyancy. Density refers to the measure of how much mass is contained within a given volume, while buoyancy refers to the upward force exerted on an object submerged in a fluid, such as water or air.

The lab report aims to explore the relationship between density, mass, and volume by conducting experiments and analyzing data. It may involve measurements of different objects or substances, determining their masses and volumes, and calculating their densities. The report may also involve experiments related to buoyancy, such as determining the buoyant force on an object and investigating factors affecting buoyancy.

By conducting the lab and analyzing the obtained results, the lab report aims to provide a deeper understanding of these fundamental concepts in physics and to demonstrate the principles of density and buoyancy through practical experimentation. The report may also include discussions of the significance and applications of density and buoyancy in various fields, such as engineering, architecture, and fluid dynamics.

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The team of engineers must first define the problem, Option A.

The term air quality has to do with the overall purity of the air in a certain locality. We know that the air in an area is affected by the activities of the people that reside in that vicinity.

In this case, the team of engineers must first define the problem before they can  improve local air quality in the community.

Missing parts;

A team of engineers is asked to help a community improve local air quality. What must the team do before it can begin to identify possible solutions?

answer choices

Iterate to improve the solution.

Define the problem.

Select one solution.

Model the solution.

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For the same amount of heat, you would be able to warm approximately 1.85 kg of 19.5 °C air to 29.0 °C.

To solve this problem, we can use the equation Q = mcΔT, where Q represents the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

In Part A, the water has a mass of 1.05 kg and is warmed from 19.5 °C to 29.0 °C. We can calculate the heat transferred to the water using the specific heat capacity of water, which is approximately 4186 J/kgK. Thus, the heat transferred to the water is given by Q = (1.05 kg) * (4186 J/kgK) * (29.0 °C - 19.5 °C).

Now, for the same amount of heat, we need to determine the mass of air that can be warmed to the same temperature range. Since the air is assumed to be 100% N2, we can use the specific heat capacity of nitrogen gas, which is 741 J/kgK. Let's assume the mass of the air is m_air kg. Then, the heat transferred to the air is Q = (m_air kg) * (741 J/kgK) * (29.0 °C - 19.5 °C).

Setting these two expressions for Q equal to each other, we can solve for the mass of air, m_air. After simplifying the equation, we find m_air ≈ (1.05 kg) * (4186 J/kgK) * (29.0 °C - 19.5 °C) / (741 J/kgK).

Performing the calculation, we get m_air ≈ 1.85 kg. Therefore, for the same amount of heat, you would be able to warm approximately 1.85 kg of 19.5 °C air to 29.0 °C.

To solve Part A of the question, we use the principle of conservation of energy. The amount of heat transferred to the water is equal to the amount of heat transferred to the air. By equating the two expressions for heat (using the specific heat capacities of water and nitrogen gas), we can determine the mass of air that would be warmed to the same temperature range.

In Part B, we are asked to calculate the volume of the air at a specific temperature and pressure. To solve this, we need to use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. We are given the pressure (1.03 atm), temperature (19.5 °C), and molar mass of nitrogen gas (28.0 g/mol). Using this information, we can calculate the number of moles of nitrogen gas and then use it to find the volume of the air.

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