a spring whose equilibrium length is 6 m is compressed to a length of 1/2 m when a force of 15 n is applied. find the work done by the spring force while it is compressed to a length of 5 m.

The density of mercury at [tex]200^{\circ}C[/tex] is [tex]13122.35 kg/m^3[/tex].

It is given that,

The initial temperature, [tex]T_0=0^{\circ}C[/tex].

The density of mercury at [tex]0^{\circ}C[/tex] is [tex]\rho_{0}=13600 kg/m^3[/tex].

The volume expansion coefficient for mercury is [tex]\alpha_v=182\times10^{-6} (^{\circ}C^{-1})[/tex].

The final temperature, [tex]T=200^{\circ}C[/tex].

Let us assume that,

The initial volume of mercury is [tex]V_0[/tex] [tex]m^3[/tex].

The final volume of mercury is [tex]V[/tex] [tex]m^3[/tex].

The volume expansion formula is given as,

[tex](V-V_0)=V_0\alpha_v(T-T_0)[/tex]

[tex]\Rightarrow V=V_0+V_0\alpha_v(T-T_0)[/tex]

[tex]\Rightarrow V=V_0+V_0(182\times10^{-6})(200-0)[/tex]

[tex]\Rightarrow V=V_0+(0.0364)V_0[/tex]

[tex]\Rightarrow V=1.0364V_0[/tex]

The initial density, [tex]\rho_0=\frac{m}{V_0}=13600 kg/m^3[/tex].

Hence. the final density, [tex]\rho=\frac{m}{V}[/tex].

So, [tex]\frac{\rho}{\rho_0}=\frac{m/V}{m/V_0}[/tex]

[tex]\Rightarrow \frac{\rho}{13600}=\frac{V_0}{V}[/tex]

[tex]\Rightarrow \frac{\rho}{13600}=\frac{V_0}{1.0364V_0}[/tex]

[tex]\Rightarrow \rho=\frac{13600}{1.0364} kg/m^3[/tex]

[tex]\Rightarrow \rho=13122.35 kg/m^3[/tex]

Therefore, the density of mercury at [tex]200^{\circ}C[/tex] is [tex]13122.35 kg/m^3[/tex].

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The central will a listener be at the first  minimum and thus have difficulty hearing the sound is 41.2 m.

As with all waves, the relationship between sound speed, frequency, and wavelength can be described by the equation where stands for sound speed, stands for sound frequency, and represents the wavelength.

Perpendicular to the speaker and spaced  from the central should make up the initial minimum.

Therefore,

100m/[(0.300m)(3000Hz)/(343m/s)]²-1

= 41.2 m

Therefore, the central  will a listener be at the first minimum and thus have difficulty hearing the sound is 41.2 m.

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Miss case of 16 calculators, which she got for half price. Shipping was $12. Which brought the total to $100. The full price for a case is $176.

A calculation is a deliberate mathematical process that transforms one or more inputs into one or more outputs or results.

Here the price of the calculator has to be calculated

The total price including the shipping is $100

She got 16 calculators

Shipping was $12

100 - 12 = 88

Since there was half price.

88 x 2  = $176

Therefore, the full price for a case is $176.

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It is made up of three pieces that are closely packed together. Particles from one of outside parts are pumped all around circuit onto the second outer layer.

Because of this, the capacitor is occasionally referred to as the capacitor. A passive element is known as a capacitor because it can store more electric power than a comparable element when employed as an insulator and insulated conductor.

The capacitor symbol must show the construction of the capacitor as two lines, either flat and curved, close but not touching.

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Although being a fossil fuel, natural gas is cleaner and more effective than other conventional fuels. According to the Center for Liquefied Natural Gas, natural gas emits fewer greenhouse gases and pollutants than its competitors. Thus, it is true.

The methane and other hydrocarbon molecules in the decomposing organisms contain chemical energy that was previously obtained by photosynthesis from the sun. Burning natural gas can provide power as well as heat homes.

Methane makes up the majority of natural gas, but it also includes ethane, propane, and heavier hydrocarbons. Moreover, it has trace amounts of water, nitrogen, carbon dioxide, and hydrogen sulphide.

Therefore, it is true that therm is a unit that is generally used to measure the energy contained in natural gas.

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The resistance is directly proportional to the temperature. Then resistance of platinum at 100°C IS 2.5 Ω. Then, the when the resistance becomes 9.61 ohms is 384°C. Then, the resistance at 45°C is 1.1 ohms.

Resistance in a material is the hindrance to electric current. The resistance through a material depends on the electric voltage, temperature and current.

The resistance is directly proportional to the temperature.

then given R1/T1 = R2/T2

Given the resistance at 100 °C is 2.5 ohms .

R2 = 9.6 ohms

then, T2 = R2 T1/R2

T2 = (9.6 ohms × 100°C)/2.5 ohms = 384°C.

Then, the resistance at 45 degree Celsius is calculated as follows;

R2 = (2.5 ohms × 45)/100°C = 1.1 ohms.

Therefore, the resistance of platinum at 45°C is 1.1 ohms.

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The acceleration due to gravity on a 9.8 x 1026 kg planet that has a radius of 2.8 x 107 m g = 9.8 m/s2.

calculation using the equation:

Gravity (g) = (G x Mass of Planet)/(Radius of Planet)^2

Where G is the gravitational constant (6.67408 x 10-11m3kg-1s-2).

Therefore, gravity (g) = (6.67408 x 10-11m3kg-1s-2 x 9.8 x 1026 kg)/(2.8 x 107 m)^2

g = 9.8 m/s2

What is acceleration due to gravity?

Acceleration due to gravity is the acceleration of an object in a vacuum due to the force of gravity. It is commonly denoted by g and has a value of 9.8 m/s² or 32.2 ft/s² at sea level on Earth.

Therefore, The acceleration due to gravity on a 9.8 x 1026 kg planet that has a radius of 2.8 x 107 m g = 9.8 m/s2.

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Correct statements about light are a) b) c) d) and false statements are e) and f) based on radiation properties

Correct statements about light are:

a. High frequency photons carry more energy than long wavelength photons. This is because the energy of a photon is directly proportional to its frequency, according to the equation E=hf, where E is energy, h is Planck's constant, and f is frequency. Therefore, photons with higher frequencies (and shorter wavelengths) have higher energy than those with lower frequencies (and longer wavelengths).

b. All electromagnetic waves travel at the speed of light. This is a fundamental property of electromagnetic waves, which are made up of oscillating electric and magnetic fields that propagate through space at the speed of light in a vacuum.

c. Light can act both as a wave and a particle. This is known as wave-particle duality and is a fundamental concept in quantum mechanics. Depending on the experiment, light can exhibit both wave-like and particle-like behavior.

d. A photon is a particle of light. This is true. Photons are the fundamental particles of light and are massless particles that travel at the speed of light.

e. Different types of electromagnetic radiation are fundamentally different types of waves. This is false. All types of electromagnetic radiation are fundamentally the same type of wave, differing only in their frequency and wavelength.

f. The only type of electromagnetic radiation that is actually considered light is visible light. This is false. All types of electromagnetic radiation, from radio waves to gamma rays, are considered forms of light. However, the human eye is only sensitive to a narrow range of frequencies within the electromagnetic spectrum, which we perceive as visible light.

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Answer: Determine if the electricity is flowing.

Explanation:

If I have this correct, with how you said it, it's to make sure the electricity is flowing because you can actually see it when it's on and off to tell the difference!

The two types of forces that act on a fluid element is body forces and surface forces.

A body force is a force that acts throughout the volume of a body.( 1) Forces due to graveness, electric fields and glamorous fields are exemplifications of body forces. Body forces discrepancy with contact forces or face forces which are wielded to the face of an object.

Normal forces and shear forces between objects are superficial forces as they're wielded to the face of an object. All cohesive face magnet and contact forces between objects are also considered as face forces.

Face force denoted fs is the force that acts across an internal or external face element in a material body. face force can be perished into two vertical factors normal forces and shear forces. A normal force acts typically over an area and a shear force acts parenthetically over an area.

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As the electric field gets stronger, the distance between equipotential lines decreases.

Equipotential lines are hypothetical paths through space that link places with an identical electric potential. Equipotential lines, then, are a group of electric field sites where the electric potential is constant. These lines enable a way to see and comprehend the electric field in a specific area because they are always perpendicular to the electric field lines at every point.

In several branches of physics, including electrostatics, electromagnetism, and quantum mechanics, equipotential lines are helpful. They are used to explain and comprehend how charged particles and electric fields behave.

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They will impact human food supplies.

Climate change is affecting food production by causing changes in temperature, precipitation patterns, and extreme weather events, which can reduce crop yields and disrupt food systems. This, in turn, can impact food security and increase food prices, particularly for vulnerable populations. Climate change is also affecting the distribution of fish and other aquatic species, which are critical sources of protein for many communities.

In fact the statement that the climate change affects plants and animals more than people can be considered as true. Because, they cannot have sufficient protection as humans have.

The climate is the change in whether for a longer period of time over an area. The climate changes in each season and apart from that, some worse conditions in earth make some dramatic climate changes which badly affects all living and non- living things in the world.

The global warming is the notable climate change occurring in earth due to the uncontrolled emission of gases like carbon dioxide. The rise in temperature melts the ices and rises the sea level which leads to the extinction of some polar animals.

Plants and animals are more pronged to these changes because they don' t have sufficient protection against the threatening climatic changes. Hence, option C is correct.

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The velocity of an item traveling in a circle at a constant speed is changing, therefore the object is still accelerating.

Since its velocity is changing, an object traveling in a circle at a constant speed is still accelerating. Particularly, even if its speed doesn't change, the direction of motion does. The item is being pulled towards the center of the circular route by a centripetal force, which is the cause of the direction shift.

The acceleration of an object moving in a circular motion at a constant speed can be calculated using the following formula:

a = [tex]v^2 / r[/tex]

where

a is the centripetal acceleration,

v is the speed of the object, and

r is the radius of the circular path.

The velocity of an item traveling in a circle at a constant speed is changing, therefore the object is still accelerating.

In particular, even while its speed is constant, its direction of motion is continually changing. A centripetal force, which is dragging the item towards the centre of the circular route, is to blame for this shift in direction.

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If the flux of the electric field through the closed surface is zero then the electric field at points on that surface must be zero.

On the off chance that the electric field going through a shut surface is uniform and opposite to the surface, the electric transition through the surface will be zero. This happens on the grounds that the electric field lines enter and leave the surface at equivalent rates, prompting a net transition of nothing. Be that as it may, in the event that the electric field is non-uniform or not opposite to the surface, the electric transition through the surface won't be zero. The electric motion through a shut surface is connected with how much charge encased by the surface, as given by Gauss' regulation. In this way, deciding the electric motion through a closed surface can give data about the charge circulation inside the surface.

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The width of the wooden block measured by the vernier caliper is 0.74 cm.

The width of the wooden block measured by the vernier caliper is calculated as follows;

Width of the wooden block = main scale reading + vernier scale reading

The main scale reading = 0.7 cm

The vernier scale reading ( point of alignment ) = ( 0.4 cm / 10 ) = 0.04 cm

The width of the wooden block measured by the vernier caliper is calculated as follows;

Width of the wooden block = 0.7 cm + 0.04 cm

Width of the wooden block = 0.74 cm

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Car speedometer is likely reading lower than your actual speed.

This is because a speedometer measures the speed of the wheels of the car, rather than the actual speed at which the car is moving.

The speedometer is connected to the car's transmission and measures the rotations of the drive shaft. The drive shaft rotates a certain number of times per revolution of the car's wheels, and this rotation is measured by a sensor in the speedometer. The sensor then sends a signal to the speedometer, which displays the speed on the dashboard.

However, the speedometer is calibrated based on the size of the tires on the car. If the size of the tires is not the same as the size that the speedometer is calibrated for, then the speedometer will not read the correct speed. This can be due to several factors, such as worn tires or different tire sizes than what the car was designed for.

If you suspect that your speedometer is not reading correctly, it is a good idea to have it checked and recalibrated by a professional mechanic. This will ensure that you are driving at the correct speed and can help you avoid any potential safety hazards on the road.

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The maximum torque on a 150-turn square loop of wire 18.0 cm on a side that carries a 36.4 a current in a 1.60 t field is 283.04 N m.

1) torque on the loop will be :

T = N*I*L^2*B*sin(90)

T = 150*36.4*0.18*0.18*1.6

T = 283.04 N m

2) T = 283.04*sin(10.9)

T = 53.52 Nm

3) I = T/N*area*B

I = 9/36.4*3.14*0.364*0.364*0.8

I = 0.082 A

Current = 0.082 A

Necklace is the rotational fellow of direct force.( 1) It's also appertained to as the moment of force( also shortened to moment). It represents the capability of a force to produce change in the rotational stir of the body.

The conception began with the studies by Archimedes of the operation of regulators, which is reflected in his notorious quotation" Give me a switch and a place to stand and I'll move the Earth". Just as a direct force is a drive or a pull, a necklace can be allowed of as a twist to an object around a specific axis.

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0.68 m/s² is the magnitude of the acceleration of a skydiver who is currently falling at one-half his eventual terminal speed.

The terminal speed of a skydiver is the maximum velocity that the skydiver reaches in freefall, where the net force acting on the skydiver is equal to zero. The terminal speed is determined by the balance between the gravitational force acting on the skydiver and the air resistance force acting on the skydiver. The acceleration of a skydiver who is currently falling at one-half his eventual terminal speed can be calculated using the equation for the net force acting on the skydiver:

[tex]F net = ma[/tex],

here,

m is mass of the skydiver,

a is acceleration.

Since, the net force is equal to zero at terminal speed, we can calculate the air resistance force at one-half the terminal speed and equate it to the gravitational force to find the acceleration. The air resistance force is proportional to the square of the velocity, so at one-half the terminal speed, the air resistance force is proportional to one-fourth of the terminal speed squared.

Let's call the terminal speed Vt and the skydiver's velocity at one-half the terminal speed V/2:-

[tex]F gravity = m * g[/tex],

here, g is acceleration due gravity (9.8 m/s^2).

[tex]F air = -k * V^2[/tex],

here, k constant that depends on the skydiver's body shape, size, and surface area.

At terminal speed, net force is zero:-

[tex]m * g = -k * Vt^2[/tex]

At one-half the terminal speed, the air resistance force is proportional to one-fourth of the terminal speed squared:-

[tex]F air = -(k/4) * Vt^2 = -(k/4) * (V/2)^2[/tex]

The gravitational force is unchanged:-

[tex]F net = m * g + Fair[/tex]

Reversing in the values:-

[tex]m * g = m * g + (-k/4) * (V/2)^2[/tex]

Rearranging the eq.:

[tex](k/4) * (V/2)^2 = m * g[/tex]

Dividing both sides by m:-

[tex](k/4) * (V/2)^2 / m = g[/tex]

[tex](V/2) / \sqrt{((k/4) / m)} = \sqrt{(g)}[/tex]

Finally, dividing both sides by (V/2):-

[tex]a = \sqrt{(g)} / \sqrt{ ((k/4) / m)}[/tex]

Note that the constant k is difficult to calculate exactly, as it depends on many factors such as the skydiver's body shape, size, and surface area, as well as the air density and altitude. However, we can use an estimated value of k to find an approximate value for the acceleration. For example, a common value used for k is 0.75, so if we use this value, we get:

[tex]a = \sqrt{(9.8 m/s^2)} / \sqrt{((0.75/4) / m)} = 0.677 = 0.68 m/s^2[/tex].

Hence, the magnitude of the acceleration of a skydiver who is currently falling at one-half his 0.68 m/s².

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Yes, there is a force of friction acting on the car at the point pictured. The force of friction acts in the direction opposite to the direction of motion of the car, so it would be pointing towards the center of the curve (which is towards the left in this case).

What is Constant Speed?

Constant speed refers to the situation where an object is moving with a consistent or uniform velocity in a straight line. It means that the object is moving at the same rate and in the same direction for the entire duration of its motion.

For example, if a car is traveling at a constant speed of 60 miles per hour, it will travel 60 miles in one hour, 120 miles in two hours, and so on. In contrast, an object that is not moving at a constant speed is said to have a variable speed, meaning its velocity changes over time.

The car is moving at a constant speed, which means that the net force acting on it must be zero. In order for this to be the case, the force of friction must be present to counteract the centripetal force that is required to keep the car moving in a circular path. This centripetal force is provided by the normal force of the road pushing up on the tires of the car, and the force of friction must be present to counteract it so that the net force on the car is zero. Therefore, the correct answer is (c) yes, pointing left.

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The organ pipe produces a note with a frequency of approximately 181 Hz.

f = (nv)/(2L)

where:

f = frequency

n = the harmonic number (the first harmonic is 1, the second is 2, etc.)

v = the speed of sound (343 m/s)

L = the length of the pipe (95 cm = 0.95 m)

Since the pipe is open on both ends, it can produce all the odd harmonics (1st, 3rd, 5th, etc.). We'll find the frequency of the first harmonic (n=1):

f = (1343)/(20.95)

f = 181.05 Hz

Frequency is a term used in physics to describe the number of waves, vibrations, or cycles that occur in a given amount of time. It is measured in Hertz (Hz), which represents the number of cycles per second. For example, if a wave oscillates up and down 50 times in one second, its frequency is 50 Hz.

Frequency is a fundamental concept in many areas of physics, including sound, light, and radio waves. It is an important factor in determining the pitch of a sound, as well as the color of light.

In addition, frequency is closely related to the wavelength of a wave, which is the distance between two consecutive points of a wave with the same phase. The relationship between frequency and wavelength is given by the equation c = fλ, where c is the speed of light or sound, f is the frequency, and λ is the wavelength.

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2. The field representation of a positive charge would not be a good representation of the gravitational field around one mass because the electric force between charged particles is an electromagnetic force that behaves differently from the gravitational force between masses.

3. The field around two positive charges would not be a good representation of the gravitational field around two masses because the direction of the electric force between two charges is dependent on their relative positions and charges, whereas the direction of the gravitational force between two masses is always attractive and points toward the center of mass.

4, A good analogy for the process of work being done and electric potential energy being stored when positive and negative charges are moved farther apart would be the process of lifting a heavy object because work must be done to lift a heavy object and store gravitational potential energy, work must be done to separate positive and negative charges and store electric potential energy.

5. The gravitational force is the dominant force we notice in our everyday interactions and at planetary or larger scales because it depends only on the mass of the objects, which is typically much larger than their charge.

The gravitational force between two masses is proportional to the product of their masses and inversely proportional to the square of the distance between them, while the electric force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

Gravitational force is a long-range force that acts between all masses, while the electric force is a short-range force that acts only between charged particles.

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The volume of water displaced canoe compared to an ultra-lightweight  Kevlar canoe is 1.586ft^3 extra water.

Which would give us the total volume displace by each canoe, however, the problem asks us for the difference between volumes displaced, and thus the difference is:

ΔV = (Mc_c + Mc_K /ρ)_c - (Mc_c + Mc_K /ρ)_K

Since both the mass of the load and the density of the fluid is the same for both cases, the previous equation becomes:

ΔV = Mc_c - Mc_K /ρ

ΔV = 140lb - 41lb / 62.4 lb/ft^3

ΔV = 1.586ft^3

Kevlar canoe is a type of canoe made of a material called Kevlar. Kevlar is a strong synthetic fiber that is known for its resistance to abrasion, heat, and cuts. It is commonly used in the manufacturing of body armor, bulletproof vests, and other protective gear. In the case of a Kevlar canoe, the material is used to construct the hull of the canoe, making it lightweight, durable, and easy to maneuver.

Kevlar canoes are popular among outdoor enthusiasts, particularly those who enjoy canoeing or kayaking in whitewater rivers, lakes, or oceans. They are also popular among people who like to take long trips or expeditions as the Kevlar material ensures the canoe can withstand harsh conditions and heavy use.

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Complete Question: -

How much extra water does a 140-lb concrete canoe displace compared to an ultra -lightweight 41-lb Kevlar canoe of the same size carrying the same load?

The density of mercury is 13,600 kg/m³ at 0°C . 13,119 kg/m³ is the density of mercury at 200 °C.

The density of mercury at 0 °C is given as 13,600 kg/m³. To find the density of mercury at 200 °C:-

ρ2 = ρ1 / [1 + β (T2 - T1)]

The coefficient of volume expansion of mercury is given as 1.82 x 10⁻⁴ K⁻¹.

Converting the temperatures to Kelvin, we have:

T₁ = 0 + 273.15 = 273.15 K

T₂ = 200 + 273.15 = 473.15 K

ρ₂ = 13,600 kg/m³ / [1 + (1.82 x 10⁻⁴ K⁻¹)(473.15 K - 273.15 K)]

ρ₂ = 13,600 kg/m³ / [1 + (1.82 x 10⁻⁴ K⁻¹)(200 K)]

ρ₂ = 13,600 kg/m³ / [1 + 0.0364]

ρ₂ = 13,600 kg/m³ / 1.0364

ρ₂ = 13,119 kg/m³

Therefore, the density of mercury at 200 °C is approximately 13,119 kg/m³.

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A medical linear accelerator accelerates electrons to create high-energy beams, with energy levels fluctuating between 200 and 210 MeV, which is used to destroy tumors while preserving healthy tissue. The beam energy fluctuations could be represented using a cumulative distribution function in statistics.

A medical linear accelerator is a device used in cancer treatment. It utilizes electromagnetic fields to accelerate electrons to high speeds, creating a beam of high energy. This energy, typically oscillating or fluctuating between 200 and 210 MeV (mega-electron volts), targets cancerous tumors, destroying them with minimal damage to surrounding healthy tissues. In statistics, the cumulative distribution function could be utilized to understand or describe the probability associated with these energy fluctuations of the electron beam.

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Sulfur dioxide (SO2) is a chemical compound that is composed of one sulfur atom and two oxygen atoms. It is a colorless gas with a pungent odor, and is produced by both natural and anthropogenic sources.

Describe Sulphur Dioxide?

Natural sources of sulfur dioxide include volcanic eruptions, while anthropogenic sources include the burning of fossil fuels, such as coal and oil, and the smelting of ores containing sulfur. Sulfur dioxide is also used in the production of paper, wine, and other products.

a. To find the fraction of its mass that Io would lose in 4.5 billion years, we first need to find how much sulfur dioxide it would lose in that time.

One year has 31536000 seconds (60 seconds per minute × 60 minutes per hour × 24 hours per day × 365 days per year), so 4.5 billion years is:

4.5 billion years × 31536000 seconds per year = 1.42 x 10¹⁷ seconds

So, the total amount of sulfur dioxide lost in that time is:

1000 kg/s * 1.42 x 10¹⁷ s = 1.42 x 10²⁰ kg

To find the fraction of Io's mass that this represents, we need to divide this amount by Io's mass. According to NASA, Io's mass is about 8.9319 x 10²² kg.

Fraction of Io's mass lost = (1.42 x 10²⁰ kg) / (8.9319 x 10²² kg) = 0.00159

Therefore, Io would lose about 0.159% of its mass in 4.5 billion years at this rate.

b. If sulfur dioxide currently makes up 1% of Io's mass, we can use the same rate of loss to determine how long it would take for Io to run out of this gas.

Let's call the amount of sulfur dioxide currently on Io SD₀. Then we can set up the following equation:

SD₀ - 1000 kg/s × t = 0

where t is the time in seconds it takes for Io to lose all of its sulfur dioxide.

We know that SD₀ is 1% of Io's mass, so we can use the mass of Io from part a to find SD₀:

SD₀ = 0.01 × 8.9319 x 10²² kg = 8.9319 x 10²⁰ kg

Plugging this in, we get:

8.9319 x 10²⁰ kg - 1000 kg/s × t = 0

Solving for t, we get:

t = (8.9319 x 10²⁰ kg) / (1000 kg/s) = 8.9319 x 10¹⁷ seconds

Converting this to years, we get:

t = 8.9319 x 10¹⁷ s / 31536000 s per year = 2.83 x 10¹⁰ years

Therefore, at the current rate of loss, Io would run out of sulfur dioxide in about 28.3 billion years.

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If speed of particle triples, the kinetic energy will be times six (6).

Kinetic energy is the energy possessed by an object because of its motion, equal (nonrelativistically) to one half the mass of the body times the square of its speed.

The kinetic energy of a moving object is directly proportional to its mass and directly proportional to the square of its velocity.

This means that an object with twice the mass and equal speed will have twice the kinetic energy while an object with equal mass and twice the speed will have quadruple the kinetic energy.

Therefore, an object with triple speed will have times six kinetic energy.

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Answer: I think false!

Explanation: hope this helps and I hope everyone is having a good day/Friday&weekend^^

An airplane flies 170km in 15 min  in the given case.

To find the average speed, we divide the total distance by the time taken:

Average. speed = Total distance / Time taken

In this case, the total distance is 170 km and the time taken is 15 min. However, it's more common to express speed in km/hr, so we need to convert 15 min to hours:

15 min = 15/60 = 0.25 hours

Now we can calculate the average speed:

Avg. speed = 170 km / 0.25 hours = 680 km/hr

Therefore, the average speed of the airplane is 680 km/hr.

Q1b. Sarah rides her horse with a constant speed of 20 km/hr. How far can she travel in 4 hours?

To find the distance Sarah can travel in 4 hours, we multiply her speed by the time:

Distance = Speed x Time

In this case, Sarah's speed is 20 km/hr and the time is 4 hours, so:

Distance = 20 km/hr x 4 hours = 80 km

Therefore, Sarah can travel 80 km in 4 hours on her horse.

Q2a. An airplane flies at a constant speed of 780 miles per hour. How long will it take to travel a distance of 2635 miles?

To find the time it takes the airplane to travel a distance of 2635 miles, we divide the distance by the speed:

Time = Distance / Speed

In this case, the distance is 2635 miles and the speed is 780 miles per hour, so:

Time = 2635 miles / 780 miles per hour ≈ 3.38 hours

Therefore, it will take the airplane approximately 3.38 hours to travel a distance of 2635 miles at a constant speed of 780 miles per hour.

Q2b. An airplane flies at a constant speed of 540 miles per hour. How long will it take to travel a distance of 2160 miles?

To find the time it takes the airplane to travel a distance of 2160 miles, we divide the distance by the speed:

Time = Distance / Speed

In this case, the distance is 2160 miles and the speed is 540 miles per hour, so:

Time = 2160 miles / 540 miles per hour = 4 hours

Therefore, it will take the airplane 4 hours to travel a distance of 2160 miles at a constant speed of 540 miles per hour.

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Centripetal acceleration, the acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.