The law of conservation of energy:
a. states that energy can neither be created nor destroyed.
b. states that energy can neither be created nor destroyed and cannot change from one form to another.
c. states that energy cannot be created or destroyed, but it can be changed from one form to another.

Answer:

the second option

Explanation:

an object vibrating at a second objects natural frequency forces the second object to vibrate

a) The bolt 1.38 seconds to fall through the last 20% of its fall.

b) The bolt begins the last 20% of its fall 3.06 seconds after it is dropped.

c) The speed of the bolt just before it hits the ground is 42.43 m/s.

(a) The time it takes for the bolt to fall through the last 20% of its fall can be calculated using the kinematic equation:

[tex]y = vi*t + (1/2)at^2[/tex]

where y is the distance fallen, vi is the initial velocity (which is 0), a is the acceleration due to gravity ([tex]-9.8 m/s^2[/tex]), and t is the time taken.

Let's call the total distance fallen by the bolt "d". Then, the distance fallen in the last 20% of the fall is 0.2d, and the distance fallen before that is [tex]0.8d[/tex]. So we can write:

[tex]0.2d = (1/2)at^2[/tex]

Solving for t, we get:

[tex]t = sqrt((0.2d)/(0.5*a))[/tex]

Plugging in the values, we get:

[tex]t = sqrt((0.290)/(0.5(-9.8))) = 1.38 seconds[/tex]

To find the speed of the bolt at the end of this 20% fall, we can use the kinematic equation:

[tex]v = vi + a*t[/tex]

where v is the final velocity, vi is the initial velocity (which is 0), a is the acceleration due to gravity ([tex]-9.8 m/s^2[/tex]), and t is the time taken.

Plugging in the values, we get:

[tex]v = 0 + (-9.8)*1.38 = -13.524 m/s[/tex]

The negative sign indicates that the velocity is downward.

(b) The time at which the bolt begins the last 20% of its fall can be found by multiplying the total time taken to fall by 0.8 (since the first 80% of the fall takes 80% of the total time):

[tex]t_start = 0.8sqrt((2d)/g) = 0.8sqrt((2*90)/9.8) = 3.06 seconds[/tex]

(c) The speed of the bolt just before it hits the ground can be found using the kinematic equation:

[tex]v^2 = vi^2 + 2ay[/tex]

where v is the final velocity, vi is the initial velocity (which is 0), a is the acceleration due to gravity [tex](-9.8 m/s^2)[/tex], and y is the distance fallen.

Plugging in the values, we get:

[tex]v = sqrt(0 + 2*(-9.8)*90) = 42.43 m/s[/tex]

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The graph of an accelerating object shows the increase in velocity with time. The object which is not accelerating is having a constant velocity with out any change in direction or magnitude.

Acceleration is a physical quantity that, measures the rate of change in velocity. It is a vector quantity thus having both magnitude and direction. It can be defines as the ratio of change in velocity to the change in time.

The change in direction or magnitude or in both of velocity leads to an acceleration on the object. The object moving through a circular curvature is having a change in its direction of velocity. Hence, the object  is accelerating.

For an object moving without a change in velocity and no change in direction, the object is not accelerating at all as seen in the graph 2.

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In electromagnetic spectrum, the frequency and energy of electromagnetic waves increase.

The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. At the lowest end of the spectrum, radio waves have low frequency and low energy, while at the highest end, gamma rays have high frequency and high energy.

The relationship between frequency and energy can be described by the equation E = hf, where E is energy, h is Planck's constant, and f is frequency. As frequency increases, energy increases proportionally, and this relationship is consistent throughout the electromagnetic spectrum.

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Answer:

If this is the question : boy weighing 50kg climbs up a vertical height of 100m. Calculate the amount of work done by him. How much potential energy does he gain (g=9.8m/s2)

So the answer will be:

mass of boy = m = 50 kg   
height = h = 100m  

 since boy does not move anything with his force, work done by him is zero    work done on the boy = gain in potential energy   
 P.E=mgh    P.E=50×9.8×100   P.E=49KJ  so, potential energy gained by boy is 49 KJ 

Explanation:

The child closer to the book must apply a force of 49.05 N to support the board.

To solve this problem, we will use the principle of torque balance. The torque is the product of the force and the perpendicular distance from the force to the point of rotation. In this case, the point of rotation is the midpoint of the board.

First, we need to find the weight of the board. The weight is the force of gravity acting on the board, which is given by:

weight = mass x gravitational acceleration

weight = 5.00 kg x 9.81 m/[tex]s^2[/tex]

weight = 49.05 N

Next, we need to find the weight of the book.

The weight of the book is:

weight book = mass book x gravitational acceleration

weight book = 1.00 kg x 9.81 m/[tex]s^2[/tex]

weight book = 9.81 N

We can now find the torque due to the weight of the board and the book. The torque is the weight multiplied by the distance from the midpoint of the board:

torque weight = (weight board + weight book) x 1.00 m

torque weight = (49.05 N + 9.81 N) x 1.00 m

torque weight = 58.86 N*m

To balance this torque, the child closer to the book must apply a force perpendicular to the board at a distance from the midpoint of the board. We can call this distance x. The force applied by the child is the unknown we want to find, so let's call it F.

The torque due to the child's force is:

torque child = F x x

The torque balance equation is:

torque weight = torque child

Substituting the values we have found, we get:

58.86 N*m = F x x

We know that x = 1.20 m, so we can solve for F:

F = 58.86 N*m / 1.20 m

F = 49.05 N

Therefore, the child closer to the book must apply a force of 49.05 N to support the board.

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An object of mass 0. 16kg is moving forwards at a speed of 0. 50m/s. A second object of mass 0. 10kg is at rest. 0.375 m/s is the speed of the first object after the collision.

Just apply momentum conservation since the net external force on the system is zero.

0.16 × 0.50 + 0.10 × 0 = 0.10 × 0.50 + 0.16 ×v

0.080 = 0.050 + 0.16v

0.16v = 0.030

v = 0.375 m/s

The initial velocity is the velocity of the item or system prior to the impact. In contrast, final velocity refers to the velocity of the item after the contact. Use the momentum equation p = m•v to compute the momentum or velocity of an item if given the other values. The answer is no for a single pair of equal mass items.

When two masses collide in a frame with their centers of mass at rest, each ball will leave with the same (or less) speed that it entered with.

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The time taken by hiker is L/60 minutes (L = length of trail)

However, we can show the steps to find the answer if we have the length of the trail.

Let's assume that the length of the hiking trail is L meters. To make a complete circuit around the trail, the hiker needs to cover a distance of 2L meters (going up and coming back down).

                                  time = distance / speed

                                  time = (2L meters) / (2 m/s) = L seconds

                                  time in minutes = L seconds / 60

If we knew the length of the trail in meters, we could calculate the time taken in minutes using this formula.

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The physical rules that govern the universe also govern our planet. However, the truth is that while physical rules may not alter, the constants and variables we use to approximation the properties of distant planets or solar bodies do.

Even though every solar body has unique characteristics, governing physical rules remain constant. However, in the present day, our experts have discovered a variety of outside bodies that defy fundamental rules and principles. It is not necessary for every object in the cosmos to behave according to the same physical principles because everything depends on time and space. With time and distance, they might change. As of right now, Newton, Kepler, and Einstein's fundamental physical principles all hold true; otherwise, they would all be in violation.

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The mass of [tex]Fe[/tex] is 24.56g and [tex]CO2[/tex] is 726.165g could be formed by the reaction of 0.22 mol of [tex]Fe2O3[/tex] with 5.5 mol of [tex]CO[/tex].

Given the number of moles of [tex]Fe2O3[/tex] is = 0.22mol

The number of moles of [tex]CO[/tex] = 5.5mol

The reaction of given compounds Fe2O3 and CO is described as below:

[tex]Fe2O3 + 3CO --- > 2Fe + 3CO2[/tex]

Here, we can see that 1 mole 0f [tex]Fe2O3[/tex] and 3 moles of [tex]CO[/tex] produce 3moles of [tex]CO2[/tex].

As given [tex]Fe2O3[/tex] acts as the limiting reagent such that:

Moles of [tex]Fe[/tex] produced = 0.22 mol x (2 mol [tex]Fe[/tex] / 1 mol [tex]Fe2O3[/tex]) = 0.44 mol Fe

Moles of [tex]CO2[/tex] produced = 5.5 mol [tex]CO[/tex] x (3 mol [tex]CO2[/tex]₂ / 1 mol [tex]CO[/tex]) = 16.5 mol

We know the molar mass of compound [tex]CO2[/tex] is and [tex]Fe[/tex] is then,

mass of [tex]Fe[/tex] used = moles x molar mass of [tex]Fe[/tex] = 0.44 x 55.84 = 24.56g

mass of [tex]CO2[/tex] used = moles x molar mass  = 16.5 x 44.01 = 726.165g

Hence, 24.56g of [tex]Fe[/tex] and 726.165g of [tex]CO2[/tex] are used in the reaction.

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Double double toil and trouble;

Fire burn and couldron bubble. is by the struggle a lot

option A  

The phrases that the three witches in Macbeth used to inform the audience of Macbeth's actions show that Macbeth would suffer greatly. The three witches foretold Macbeth's ascension to the throne. Additionally, they told him that his reign could not be passed on to his descendants. Instead, the realm would pass to Banquo's sons. The predictions a encouraged Macbeth to kill his t friends, including Duncan, in order to fulfill have excessive desires, which Lady Macbeth pushed him to do. As a result, it to clear from the phrases that the three witches in Macbeth used to the  inform the audience about Macbeth's activities that Macbeth would face many difficulties.

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The complete question follows

Read the following lines that a group of witches say in Macbeth .What do these lines let the audience know that Macbeth is going to do?

Double double toil and trouble;

Fire burn and couldron bubble.

A) struggle a lot

B) catch fire

C) meet someone who looks like him

D) buy a cauldron

The period of the signal is 9 ms and the frequency is approximately 111.1 Hz, calculated using f = 1/T.

To decide the period and recurrence of the sign displayed on the oscilloscope follow, we want to quantify the time span between two nearby pinnacles.

From the oscilloscope follow, we can see that the time stretch between two nearby pinnacles is around 4.5 squares on the even hub, which relates to 4.5 x 2 ms = 9 ms.

Hence, the time of the sign is 9 ms.

To ascertain the recurrence of the sign, we can utilize the equation:

recurrence = 1/period

Subbing the worth of the period, we get:

recurrence = 1/9 ms = 111.1 Hz

Consequently, the recurrence of the sign is around 111.1 Hz.

To decide the period, we really want to gauge the time it takes for the sign to finish one full cycle. For this situation, we can see that the sign finishes one full cycle in around 9 ms. The recurrence, which is the quantity of cycles each second, can then be determined utilizing the equation recurrence = 1/period, which gives a recurrence of roughly 111.1 Hz.

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The minimum distance the observer has to travel in the x-direction to hear the smallest possible sound intensity is half of this distance or 0.6 m.

In this scenario, the observer is located at the midpoint between the two loudspeakers, and the two loudspeakers are emitting sound waves with the same frequency and in phase. As a result, the sound waves from each speaker will interfere with each other constructively, creating a region of high sound intensity known as a sound interference pattern.

If the observer moves slightly in either direction along the x-axis, the path difference between the two sound waves will change, causing the interference pattern to shift. This shift will result in a change in the sound intensity heard by the observer.

To find the minimum distance the observer has to travel to hear the smallest possible sound intensity, we can use the concept of destructive interference. Destructive interference occurs when the path difference between the two sound waves is equal to an odd multiple of half the wavelength of the sound wave.

The wavelength of a sound wave with a frequency of 425 Hz can be calculated using the formula:

wavelength = speed of sound / frequency = 340 m/s ÷ 425 Hz = 0.8 m

If the observer moves a distance of x in the x-direction towards one speaker and away from the other, the path difference between the two sound waves will be:

path difference = distance traveled by a sound wave from one speaker - distance traveled by the sound wave from the other speaker

= (x + d/2) - (x - d/2)

= d

where d is the distance between the two speakers.

To create destructive interference, the path difference should be equal to an odd multiple of half the wavelength:

d = (2n+1) × wavelength / 2

where n is an integer.

Since we want to find the minimum distance x, we want to find the smallest value of n that satisfies this equation.

The smallest possible sound intensity occurs when the two sound waves interfere destructively, resulting in a sound wave with zero amplitude. Therefore, we want to find the value of n that corresponds to destructive interference.

For destructive interference, n must be an odd integer. The smallest odd integer that satisfies the above equation is n = 1. Substituting this value into the equation and solving for d, we get:

d = (2n+1) × wavelength / 2 = 3/2 × wavelength = 1.2 m

Therefore, the minimum distance the observer has to travel in the x-direction to hear the smallest possible sound intensity is half of this distance, or:

x = d / 2 = 0.6 m.

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Answer:

When electric current passes through the tungsten filament, it gets heated up and starts to glow at a temperature around 2500 degree Celsius. If we do not fill any gas, at vacuum condition, the filament will evaporate due to high temperature. To protect the filament from damage, we are filling the bulb with inert gas.

Explanation:

i hope its help :)

Gionny can apply a torque of approximately 127.63 N·m to the lug nut.

To calculate the torque that Gionny can apply to the lug nut, we need to use the formula:

Torque = Force x Distance x sin(θ)

where θ is the angle between the force vector and the lever arm (the distance from the axis of rotation to the point where the force is applied), and sin(θ) is the sine of that angle.

Assuming that Gionny's weight is the force he applies on the tire-iron, and that he can exert a force equal to his weight, we can calculate the force as:

Force = mass x gravity

where mass is Gionny's mass and gravity is the acceleration due to gravity, which is approximately 9.81 m/s^2. Therefore, the force Gionny can apply is:

Force = 42 kg x 9.81 m/s^2 = 411.42 N

The distance from the lug nut to the point where Gionny applies the force is given as 0.31 m. So the torque he can apply is:

Torque = Force x Distance x sin(θ) = 411.42 N x 0.31 m x sin(90°) = 127.63 N·m

Therefore, Gionny can apply a torque of approximately 127.63 N·m to the lug nut.

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Identification of compounds can benefit from density. It is also a useful feature since it connects (or acts as a conversion factor between) a substance's mass and volume. Volume and mass are extended (or extrinsic) qualities of matter that are quantity dependent.

The force of an air mass acting on the earth's surface is known as atmospheric pressure. Remember that wind currents are created when the densities of two separate air masses differ.

Our wind currents are driven by the atmospheric pressure density, and denser air exerts a higher pressure than less dense air. Compared to the cold and dry air, the warm and humid air is less dense. The less dense air will then float on top of the thicker air in certain regions.

Therefore, Warm air masses rise while cold air masses descend because they are less dense.

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The speed of this surface water wave is 3.33 meters per second.

The speed of a surface water wave depends on the wavelength and the frequency of the wave.

The speed of a surface water wave can be determined by the equation:

speed = wavelength × frequency

Here, the wavelength is given as 20 meters (the distance between two successive crests), and the frequency can be calculated by dividing the number of crests passing by in one minute (60 seconds) by the time taken for them to pass:

frequency = 10 crests / 1 minute = 10/60 Hz = 1/6.0 Hz

Put values:

speed = 20 meters × (1/6.0 Hz) = 3.33 meters/second

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The speed of the ball just before its land on the 30 tall Tower is 39.08m/s.

The ball is thrown vertically upward with an initial vertical speed of 46 m/s the ball rises and falls to land on a 30 m tall Tower.

First letters find out the maximum height of the ball by using the formula,

H = u²/2g

Where, H is height, u is initial speed, g is acceleration due to gravity.

Putting values,

H = 46×46/(2×9.8)

H = 107.95 m.

Now when the ball reaches the maximum height and lands on the 30 metre tall Tower it covers a distance d of 77.95 m.

Now, using this distance we can find the speed of the ball just before it lands on the tower by using the formula,

V = √(2gd)

V = √(2×9.8×77.95)

V = √(1527.82)

V = 39.08m/s.

So, the speed of the ball just before it lands on the tower is 39.08m/s.

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The term that best completes the given sentence is "competitive inhibition."

define competitive inhibition ?

Competitive inhibition is a type of enzyme inhibition where a molecule, called a competitive inhibitor, binds to the active site of an enzyme and blocks the binding of the substrate, preventing or reducing the enzyme's activity. The competitive inhibitor has a similar shape to the substrate, and thus competes with the substrate for binding to the active site. This type of inhibition can be reversed by adding more substrate, which outcompetes the inhibitor for binding to the active site.

Competitive inhibition is often used in drug design, as molecules that act as competitive inhibitors can be used to selectively target specific enzymes and prevent their activity.

The term that best completes the given sentence is "competitive inhibition."

Competitive inhibition refers to a situation in which one company or individual attempts to gain an advantage over another by developing or promoting a similar product or idea that reduces the demand for the other's product or idea. In this case, Nela believes that Logan's electric yacht idea is directly competing with Dunamis Motors, and is therefore a form of competitive inhibition.

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A system has an equal chance of being in any microstate that corresponds to its current macrostate. Equilibrium is defined as an isolated system that meets the postulate of equal a priori probabilities.

The probability of discovering a system in a specific microstate is simply one divided by the total number of microstates.
The thermodynamic probability (denoted by W) is equal to the number of microstates that realise a given macrostate, so W = 1.
To put it simply, the microcanonical ensemble is defined as assigning an equal probability to every microstate whose energy falls within a range centred on E. The probability of all other microstates is set to zero.

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Force acts on it and changes its speed to 25 m/s in 5 s, then the value of force will be 250N.

The interaction between two objects, which can accelerate an object's motion, is described by the physical quantity force. In the International System of Units (SI), the Newton (N) is its standard unit of measurement.

We can use Newton's second law of motion, which states that the force acting on an object is equal to the object's mass divided by its acceleration, to determine the force's value. In this instance, the box has a starting speed of 0 m/s and a final speed of 25 m/s, which it reaches in 5 seconds. As a result, the box accelerates to:

a = (v_f - v_i) /t

= (25 m/s - 0 m/s) / 5 s

= 5 m/s²

There is no force produced by friction because the box is on a smooth surface. As a result, the only force exerted on the box is the force applied (F). The value of F can now be determined using Newton's second law of motion:

F = m × a

= 50 kg × 5 m/s²

= 250 N

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For these paces, one hour is equivalent to 3.27 miles or 5.26 kilometers for women and 3.8 miles or 6.1 kilometers for males in terms of distance.

The ratio of the total distance travelled by the body to the amount of time it took to complete that distance can be used to calculate average speed.

Formula for the average speed of a moving object with a range of speeds. The minute the minutes cancel, giving us kilometres per hour, and the speed would be 6 kilometres per hour; it then asks us to compare.

A student's average speed while walking would be 9 km/h if they covered a distance of 3 km in 20 minutes.

Therefore, to convert it to kilometres per hour, we can do so by simply converting our minutes into hours and remembering that there are 60 minutes in an hour.

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(a)  The velocity of the neutron after the collision [tex]3.00(10^3)[/tex] km/s.

(b) Different materials may have different properties that make them more or less suitable as coolants in a fast breeder reactor.

(a) In an elastic collision, momentum and kinetic energy are conserved. Let m be the mass of the neutron and M be the mass of the sodium atom. Before the collision, the momentum of the neutron is

p = mv,

where v is the velocity of the neutron.

The momentum of the sodium atom is zero because it is motionless. Therefore, the total momentum before the collision is

[tex]p_{total} = mv[/tex].

After the collision, the neutron recoils backward along exactly the same path it traveled, so its final momentum is

[tex]p_f = -mv[/tex].

By conservation of momentum, the total momentum after the collision is also

[tex]p_{total} = p_f + 0 = -mv[/tex].

Equating the total momentum before and after the collision gives:

[tex]p_{total} = mv = -mv[/tex]

Solving for the final velocity [tex]v_f[/tex] of the neutron, we get:

[tex]v_f = -v = -3.00(10^3)[/tex] km/s

Therefore, the velocity of the neutron after the collision is [tex]3.00(10^3)[/tex] km/s in the opposite direction.

(b) We follow the same procedure as in part (a), but with a lithium atom instead of a sodium atom.

Let M be the mass of the lithium atom.

Before the collision, the momentum of the neutron is

p = mv,

where v is the velocity of the neutron.

The momentum of the lithium atom is zero because it is motionless. Therefore, the total momentum before the collision is

[tex]p_{total} = mv[/tex]

After the collision, the neutron recoils backward along exactly the same path it traveled, so its final momentum is

[tex]p_f = -mv[/tex].

By conservation of momentum, the total momentum after the collision is also [tex]p_{total} = p_f + 0 = -mv[/tex].

Equating the total momentum before and after the collision gives:

[tex]p_{total} = mv = -mv[/tex]

Solving for the final velocity [tex]v_f[/tex] of the neutron, we get:

[tex]v_f = -v = -3.00(10^3)[/tex] km/s

Therefore, the velocity of the neutron after the collision is [tex]3.00(10^3)[/tex] km/s in the opposite direction.

Comparing the results of parts (a) and (b), we see that the type of metal does not affect the velocity of the neutron after an elastic collision. However, different materials may have different properties that make them more or less suitable as coolants in a fast breeder reactor.

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Given voltage drop across

EDLED is 1.8V in forward bias.

1.8 1.8 1.8

100

if

3.1kn

Applying Kirchhoff's voltage law to the circuit,

we get 10-1.8-1.8-1.8 - EXLOUD

<= 0=)46= 8×1000 [= 4.6 MA.

It is safe current level for a LED-for typical Current is arand power LED maximum forward 20 mA.

Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. In brief, voltage = pressure, and it is measured in volts (V).

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The way that an electromagnetic-wave in space never dials back is predictable with the law of preservation of energy, as it keeps a steady energy as it goes through space.

The explanation that makes sense of how the way that an electromagnetic wave in space never dials back is steady with the law of protection of energy is: "Assuming light dialed back, its energy would diminish, subsequently abusing the law of preservation of energy."

The speed of light, or any electromagnetic, still up in the air by the properties of the medium through which it is voyaging. In a vacuum, the speed of light is consistent and doesn't dial back.

This is reliable with the law of preservation of energy, which expresses that energy can't be made or annihilated, just changed starting with one structure then onto the next.

If an electromagnetic wave were to slow down, its energy would have to go somewhere. It would either be converted to another form of energy or lost entirely. This would violate the law of conservation of energy.

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Answer:

86400 seconds is equal to 1 day.

Explanation: