how high would the stack reach if you piled one million quarters in a single stack (use miles or km)

The dinosaurs produced a net counterclockwise torque of 9,400Nm about the end of the branch that was attached to the tree. The length of the branch is 4.7m.

τ = Σr × F = rmg

where g is the acceleration caused by gravity, m is the mass, and r is the distance.

Torque has a direct relationship with -

1.the object's mass, in m

2. The mass's separation, r, from the location where the torque is being calculated.

Therefore, the torque will change whether we increase or reduce them.

Therefore, increasing mass will result in an increase in torque, but since we must retain the same torque, we must reduce mass's distance from the location of the torque.

As a result, the mass should be moved closer to the location of the torque.

Total Mass = (80 + 120)kg

= 200kg

Torque = 9400N

τ = Σr × F = rmg

τ = 200 × r × 10

9400 = 200 × r × 10

r = 9400 / 2000

r = 4.7m

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The bandwidth of the RL circuit is between 11.24 Hz and 22.49 Hz.

The circuit shown in Fig. 9.5 is a simple RL circuit, and the transfer function is given by the equation,

I(s) = G(s)Ein(s) / (R + Ls) where the output is the current, I(t), and the input is the voltage, Ein(t).

The circuit parameters are L = 0.02 H and R = 2 ohms. The bandwidth of the RL circuit is defined as the range of frequencies over which the output voltage is greater than 70.7% of the input voltage. At this frequency, the output voltage is said to be half-power or -3 dB. The bandwidth of a circuit is related to its cutoff frequency, which is defined as the frequency at which the output voltage is half the input voltage.

The cutoff frequency, fc, is given by the equation,

fc = 1 / (2π√LC) where L is the inductance and C is the capacitance of the circuit.

For the RL circuit, there is no capacitance, so the equation becomes,fc = R / (2πL)Substituting the given values,R = 2 ohms and L = 0.02 H,fc = 2 / (2π*0.02)fc = 15.92 Hz

The bandwidth of the circuit is the range of frequencies between the lower and upper cutoff frequencies, which are given by the equations,

fl = fc / √2 = 15.92 / √2 = 11.24 Hzfu = fc * √2 = 15.92 * √2 = 22.49 Hz

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In other words, you need as much mirror as your height to see a reflection of yourself in a flat mirror. A correctly positioned 3 foot-long mirror is required for a 6 foot-tall guy to see his whole reflection.

What is mirror?
A thing that reflects images is a mirror as well as looking glass. When focused through an eye or camera lens, light that reflects off a mirror will reveal an image of what is in front of it. Mirrors reflect light from an equal but opposite angle, reversing the direction of the image. This enables the viewer to see themselves, objects behind them, and even objects that are in their line of sight but out of it, like objects that are around a corner, but are at an angle from them. Natural mirrors have been around since the beginning of time, such as the water's surface, but for thousands of years, people have been making mirrors from a variety of materials, including stone, metals, and glass.

Ray diagrams were explained and demonstrated for use. The location along a mirror that a person must look in order to see an image of themselves can be determined using ray diagrams. So it is possible to utilize ray diagrams to calculate what area of a plane mirror must be used in order to display an image.

The mirror must be at least half your height in size in order to show your entire image. It really is that easy mirror.

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Answer:

\(4 ms^{-2}\)

Explanation:

Normal force - should be the reaction from the surface it's on - nullifies the weight of the object. At this point the only force is of \(22-14 = 8N\) from whoever is pushing the square and the friction, towards the right. At this point we divide the force by the mass of the object to obtain an acceleration of \(8/2 = 4 ms^{-2}\)

The spinning tube of air created by winds moving in opposite directions to tip upwards and become vertical because of the updraft of wind in a supercell. Hence, option (A) is correct.

As a deep, continuously revolving updraft known as a mesocyclone, a supercell is a type of thunderstorm. This causes these storms to occasionally be called spinning thunderstorms.

Supercells, which are the least frequent and have the potential to be the most severe of the four types of thunderstorms (supercell, squall line, multi-cell, and single-cell), are the least common overall.

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As the air flows through convection oven, the required temperature less for this type of oven and convection ovens cook food more quickly and evenly.

Compared to a traditional oven, a convection oven enables a reduction in cooking temperature. This comparison will change based on various elements, such as the quantity of food being cooked at once or when airflow is being impeded, such as by an excessively large baking tray.

The fact that flowing air transfers heat more quickly than still air of the same temperature balances out this variation in cooking temperature. The temperature must be lowered to slow down the rate of heat transfer in order to transfer the same quantity of heat in the same length of time.

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Answer:

They are made of one type of atom.

Explanation:

Answer:

The answer is A

Explanation:

It take more force for something to slide across a surface then it does to change direction on the same surface

What does the word force mean?

The definition of force in physics is: The push or draw on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a trajectory and a magnitude.

Friction is the energy that opposes motion, slowing or stopping it entirely. When two things rub against one another, friction is created. Sliding friction is the resistance that any two things produce when they slide against one another. This friction, also referred to as kinetic friction, is the force required to maintain one surface moving along another.

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When two strings that have different thicknesses are compared, it will affect only one parameter, and that is wavelength. The rest of the parameters, including wave frequency, wave speed, and tension, will be constant for both strings.The explanation behind this is quite simple.

When we talk about wave frequency, we refer to the number of complete waves that pass by a given point in a certain period of time. When strings vibrate, the number of waves produced is determined by the vibrating source. The wave frequency is independent of the string's physical properties.

Wave speed refers to the speed at which the wave travels through the medium. The wave speed depends only on the medium, in this case, the string. Since both strings are made of the same material, wave speed will remain the same.Tension, on the other hand, is related to the force that is applied to the string to make it vibrate. The amount of tension in the string, however, is not dependent on the string's thickness.

Wavelength is the distance between two consecutive crests or troughs of a wave. The wavelength depends on the wave speed and the frequency. Since wave speed and wave frequency are constant for both strings, only the wavelength will be different if the strings have different thicknesses.

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Answer:

in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.

Explanation:

Answer:

The history of Asian art includes a vast range of arts from various cultures, regions and religions across the continent of Asia. ... Central Asian art primarily consists of works by the Turkic peoples of the Eurasian Steppe, while East Asian art includes works from China, Japan, and Korea.

The Evolution of Asian Art

History marks the beginning with Hindu and Buddhist art around the 5th century BCE. These ancient religions were largely represented by an introspective way of life, and their followers adorned their temples with elaborately carved walls and stone statues.

Answer:

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. ... Many crystalline substances are composed of ions held in regular geometric patterns by the attraction of the oppositely charged particles for each other.

Explanation:

(i)Therefore, it takes approximately 9.27 hours to reach its full power output.(ii)It is necessary to have quick-start power sources, this helps maintain a stable and reliable electricity supply even when wind speeds fluctuate.(c)The Bremsstrahlung effect needs to be considered to ensure proper radiation protection.(d) The near-field region is characterized by strong electric and magnetic fields while the far-field region represents the radiation zone.

(i) To calculate the time it takes for the power station to reach its full power output, we can use the formula:

Energy = Power × Time

Given that the power station generates 6120 MWh of energy over a 10-hour period and the rated power at full capacity is 660 MW, we can rearrange the formula to solve for time:

Time = Energy ÷ Power

Converting the energy to watt-hours (Wh):

Energy = 6120 MWh × 1,000,000 Wh/MWh = 6,120,000,000 Wh

Converting the power to watt-hours (Wh):

Power = 660 MW × 1,000,000 Wh/MW = 660,000,000 Wh

Now we can calculate the time:

Time = 6,120,000,000 Wh ÷ 660,000,000 Wh ≈ 9.27 hours

Therefore, it takes approximately 9.27 hours (or 9 hours and 16 minutes) for the power station to reach its full power output.

(ii) The type of power station that can be started up fastest is a gas-fired power station. Gas-fired power stations can reach full power output relatively quickly because they use natural gas combustion to produce energy.

In contrast, other types of power stations, such as coal-fired or nuclear power stations, have longer start-up times. Coal-fired power stations require time to heat up the boiler and generate steam, while nuclear power stations need to go through a complex series of procedures to ensure safe and controlled nuclear reactions.

This is relevant to optimizing the usage of windfarms because wind power is intermittent and dependent on the availability of wind. This helps maintain a stable and reliable electricity supply even when wind speeds fluctuate.

(c) The Bremsstrahlung effect is a phenomenon that occurs when charged particles, such as electrons, are decelerated or deflected by the electric fields of atomic nuclei or other charged particles. As a result, they emit electromagnetic radiation in the form of X-rays or gamma rays.

In shielding design, the Bremsstrahlung effect needs to be considered to ensure proper radiation protection. These materials effectively absorb and attenuate the emitted X-rays and gamma rays, reducing the exposure of individuals to harmful radiation.

(d) The electromagnetic field output from an antenna can be represented by two main regions:

Near-field region: This region is closest to the antenna and is also known as the reactive near-field. It extends from the antenna's surface up to a distance typically equal to one wavelength. In the near-field region, the electromagnetic field is characterized by strong electric and magnetic field components.

Far-field region: Also known as the radiating or the Fraunhofer region, this region extends beyond the near-field region.The electric and magnetic fields are perpendicular to each other and to the direction of propagation.  The far-field region is further divided into the "Fresnel region," which is closer to the antenna and has some characteristics of the near field, and the "Fraunhofer region," which is farther away and exhibits the properties of the far-field.

The transition between the near-field and the far-field regions is gradual and depends on the antenna's size and operating frequency. The size of the antenna and the distance from it determine the boundary between these regions.

In summary, the near-field region is characterized by strong electric and magnetic fields, while the far-field region represents the radiation zone where the energy is radiated away as electromagnetic waves.

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Answer:

Tuning a piano is the process of adjusting the tension of its strings, thereby altering their pitch, or frequency of vibration, by slightly turning the tuning pins to which they're attached, so that each string sounds pleasingly in harmony with every other string.

The biker's kinetic energy at the bottom of the hill is 210 J.

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

So, as the biker travels down the hill, her potential energy (PE) transforms into kinetic energy (KE).

At the top of the hill, her PE is 360 J, and she loses 150 J to heat,

so her remaining energy is 360 J - 150 J = 210 J.

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Answer:

Radio waves

Explanation:

1. The force experienced by the 5μC charge is 0.45 N.

2. The force on the 20μC charge is -0.45 N.

3. The electric field strength located at 15cm from the 20μC charge is 12 N/C.

4. The electric field lines will point away from the 20μC charge, radially outward.

1. To calculate the force experienced by the 5μC charge, we can use Coulomb's law. Coulomb's law states that the 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 is given by:

\(F = k * (q1 * q2) / r^2\)

Where F is the force, k is the electrostatic constant (9 x 10^9 Nm²/C²), q1 and q2 are the charges, and r is the distance between them.

Plugging in the values:

\(F = (9 x 10^9 Nm^2/C^2) * ((5 x 10^-6 C) * (20 x 10^-6 C)) / (0.1 m)^2\)

= 0.45 N

Therefore, the force experienced by the 5μC charge is 0.45 N.

2. By Newton's third law of motion, the force on the 20μC charge is equal in magnitude but opposite in direction to the force experienced by the 5μC charge. Hence, the force on the 20μC charge is -0.45 N.

3. To calculate the electric field strength at a point, we can use the formula:

\(E = k * (q / r^2)\)

Where E is the electric field strength, k is the electrostatic constant, q is the charge, and r is the distance from the charge.

Plugging in the values:

\(E = (9 x 10^9 Nm^2/C^2) * (20 x 10^-6 C) / (0.15 m)^2\)

= 12 N/C

Therefore, the electric field strength located at 15cm from the 20μC charge is 12 N/C.

4. Electric field lines depict the direction of the electric field. Since the charge is positive (20μC), the electric field lines will point away from it, radially outward. Hence, at the 15cm mark from the 20μC charge, the electric field lines will extend outward from the charge in all directions.

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Answer:

the one that is clicked in the photo I think is right

Answer:

your answer is 21 n

Explanation:

which of the following is not a barrier to physical activity it is fear of injury I think.

Clarence's mechanical energy is 19,680 J.  The potential energy of an object is directly proportional to its position above the reference level, and it is independent of the object's motion.

What is Potential Energy?

Potential energy is the energy stored in an object or system due to its position or configuration. It is the energy that an object has because of its position relative to other objects or due to the configuration of its internal structure. Examples of potential energy include gravitational potential energy, elastic potential energy, and chemical potential energy.

The gravitational potential energy of Clarence can be calculated using the formula:

PE = mgh

PE = (80 kg)(9.8 m/s^2)(20 m) = 15,680 J

The kinetic energy of Clarence can be calculated using the formula:

KE = (1/2)mv^2

KE = (1/2)(80 kg)(10 m/s)^2 = 4,000 J

The mechanical energy of Clarence is the sum of his gravitational potential energy and his kinetic energy:

ME = PE + KE = 15,680 J + 4,000 J = 19,680 J

Therefore, Clarence's mechanical energy is 19,680 J.

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Answer:

58.5

Explanation: no clue on how to do it but i just got that answer on my accelus✨

To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. The direction of the boat is northward and its magnitude is 1.633 m/s².

An object is said to be accelerated if there is a change in its velocity. The rate of change of velocity with respect to time is known as the velocity. It is a vector quantity and it has both magnitude and direction. It is the first derivative of velocity with respect to time.

Fx = 2200 [N]

Fa = 1350 [N]

F = √(Fₓ)² + (Fₐ)²

F = √(2200)² + (1350)²

F = 2581.18 N

Now using Newton's second law.

F = m×a

a = F / m

a = 2581.18 / 1580

a = 1.633 m/s²

Thus acceleration is 1.633 m/s² and it is northward direction.

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Chemical changes happens more on earth because, every living as well as non living things are under going some chemical changes day to day.

Chemical changes involves the formation or breaking of chemical bonds that leads to a new product. Whereas, physical changes does not involves any change in chemical bonds. Phase change, change in size, shape etc. are physical changes.

For example rusting of iron is the formation of red iron oxide by the reaction of iron with oxygen from air or water. This oxide will spread over the surface of the metal and eventually gets corroded. This is a chemical change where a new product is formed.

The photosynthesis, and all biological process taking place every day in all living things are chemical changes. Similarly, non-living things as well undergoing similar changes by their reactivity towards air, water etc.

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Physical changes happens more on earth.

Physical changes are reversible and do not produce a new substance. Chemical changes result in the production of a new substance and cannot be reversed.

Given terms,

Physical and Chemical changes on earth on Earth,

Earth has about 71 percent on the Earth's surface, and the oceans hold about 96.5 percent of all Earth's water.

which undergoes through physical change during whole water cycle,

Hence, On earth physical changes happen more.

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Part A:

The angular speed of the door just after the collision is 0.489 rad/s.

Part B:

Therefore, the angular speed of the door after the collision is the same, whether the ball rebounds or comes to a stop because the change in the ball's momentum is compensated by a change in the door's angular speed.

initial angular momentum is :

L(ball) = r x p

where p

p = m*v

p = 0.5*20 = 10 kg m/s

L(ball) = 0.6*10 = 6 kg m^2/s

the angular momentum of the door after the collision is:

L(door) = I*ω

The moment of inertia of a uniform rectangular door rotating about an axis perpendicular to its plane and passing through its center is given by:

I = (1/12)m(w^2 + h^2)

I = (1/12)35(0.9^2 + 2^2) = 12.31 kg m^2

applying  the conservation of angular momentum, we have:

L(ball) = L(door)

6 = 12.31*ω

ω = 6/12.31 = 0.489 rad/s

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Answer:

The Northern flowing stream will affect the coast of Europe by  making  climate of Western Europe and Northern Europe to be warmer than other areas that are located around the same latitude and this is simply because of the North Atlantic Current

Explanation:

The Northern flowing stream will affect the coast of Europe because the North Atlantic current causes the Gulf stream to be split into two ( 2 ) and the Northern stream which is a warm stream crossing over to Northern Europe. The Gulf stream makes climate of Western Europe and Northern Europe to be warmer than other areas that are located around the same latitude and this is simply because of the North Atlantic Current

Answer:

After 2 seconds the velocity of the object is 0 m/s.

Explanation:

The velocity at 2 seconds later can be calculated as follows:

\( V_{f} = V_{0} - gt \)

Where:

\(V_{f}\): is the velocity at 2 seconds

\(V_{0}\): is the initial velocity = 20 m/s

g: is the gravity = 10 m/s²

t: is the time = 2 s

Hence, the final velocity is:

\( V_{f} = V_{0} - gt = 20 m/s - 10 m/s^{2}*2 s = 0 m/s \)

This value (0 m/s) means that the object has reached the maximum height.

Therefore, after 2 seconds the velocity of the object is 0 m/s.

I hope it helps you!

To determine how far Martha must move the eyepiece in order to focus on the bird, we can use the lens formula.

To focus on the bird, Martha needs to adjust the eyepiece by a distance that brings the final image distance (v) to 50 m. The exact calculation for the movement of the eyepiece will depend on the specific values of u and the corresponding value of v.To determine the distance by which Martha must move the eyepiece in order to focus on the bird, we need to calculate the change in the position of the eyepiece.The change in the position of the eyepiece can be found by subtracting the initial position of the eyepiece from the final position.

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Answer:

Greenhouse gases have far-ranging environmental and health effects. They cause climate change by trapping heat, and they also contribute to respiratory disease from smog and air pollution. Extreme weather, food supply disruptions, and increased wildfires are other effects of climate change caused by greenhouse gases.

Explanation:

:) YW

Answer:

according to scientists greenhouse gasses, include co2 which can heat up the climate. cars and factorys creat co2 admission which cause global warming