The velocity of a bus increases by 20 m/s in 80 seconds. What is the
acceleration of the bus?
A. 0.25 m/s2
B. 4 m/s2
C. 60 m/s2
D. 100 m/s2

The required value of Stefan-Boltzmann Constant is 5.67 × 10⁻⁸ W.m⁻².K⁻⁴ or 5.67 × 10⁻⁵ erg.cm².s.K⁴.

Stefan's constant, also referred to as the Stefan-Boltzmann Constant, is a fundamental constant used in physics. It is the ratio constant in the Stefan-Boltzmann equation for Blackbody radiation. The Greek symbol σ stands for the Stefan Boltzmann Constant. The value of the Stefan Boltzmann constant can be calculated or discovered empirically.

The SI values for the Stefan Boltzmann constant's value are as follows:

Stefan Boltzmann Constant σ = 5.67 × 10⁻⁸ W.m⁻².K⁻⁴

It can also be stated using different units. Stefan-Boltzmann Constant in the CGS unit is 5.67 × 10⁻⁵ erg.cm².s.K⁴.

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Answer:

The force exerted by the rubber band will increase. This is because the restoring force (force which acts to bring a body back to its equilibrium state) always acts in opposite direction to the force which acts to pull the body from its equilibrium position. And as the distance increases the force increases as well.

Explanation:

Answer:

26897.3 m

Explanation:

1 km = 1000 m

1 cm = 0.01 m

so the calculation will be

25873 m + 1024 m + 0.03 m= 26897.3 m

The sum of the given expression (25.873 kilometers ) + (1024 meters ) + (3.0 centimeters)  would be 26897.0 meters.

In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.

As given in the problem we have to Calculate the following sum and express the answer in meters, by Following the rules for significant figures,

(25.873 kilometers ) + (1024 meters ) + (3.0 centimeters)

1 kilometers = 1000 meters

1 meter =100 centimeters

(25.873 ×1000×100) + (1024×100 ) + (3.0 centimeters)

                = 26897.03 centimeters

Thus ,the sum of the given expression (25.873 kilometers ) + (1024 meters ) + (3.0 centimeters)  would be 26897.0 meters.

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The velocity of the gold puck after the collision be (2i - j) m/s.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Given parameters:

Mass of the gold puck: m = 12 kg

Velocity of it before collision: u =  5i – 4j m/s.

Mass of the stationary blue puck: M = 18 kg.

Velocity of it after collision; V = 2i – 2j m/s.

We have to find:  the velocity of the gold puck after the collision: v = ?

From conservation of linear momentum, we get:

Total momentum of the system before collision =  Total momentum of the system after collision

⇒ mu + M.0 = mv + MV

⇒ v = u - MV/m

⇒ v  = (5i – 4j) m/s  - (2i – 2j)m/s×18/12.

⇒ v  = (5i – 4j) m/s - (3i - 3j) = (2i - j) m/s.

Hence velocity of the gold puck after the collision be (2i - j) m/s.

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The rate at which a crane can do work  is 41.32 watt.

Power can be defined as the amount of work completed in a given amount of time. Watt (W), which is derived from joules per second (J/s), is the SI unit of power.

Horsepower (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motor vehicles and other devices.

Mass of the crate = 5 kg.

Vertical displacement of it = 78 m.

Time taken = 92.50 second.

Hence, power of the crane = ( 5 kg × 9.8 m/s² × 78 m) ÷ 92.50 second

= 41.32 Watt.

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The angle that the vector sum makes with north. The direction the ship must travel is this angle, measured west of north.

We need to determine the angle that the vector sum of the ship's velocity relative to the sea and the ocean current creates with north in order to determine the direction the ship must go in order to have a velocity that is directly north relative to the earth.

Call the angle between the north and the ocean current. The east-west and north-south components of the ship's velocity in relation to the sea may be separated out.

The component along the east-west direction is 5.5 * cos(θ),

and the component along the north-south direction is 5.5 * sin(θ).

Adding the ocean current,

Which has a magnitude of 1.5 and direction 40º north of east, we get:

East component = 5.5 * cos(θ) + 1.5 * cos(40º)

North component = 5.5 * sin(θ) + 1.5 * sin(40º)

Dividing the North component by the magnitude of the vector sum and taking the inverse tangent.

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True. Recent evidence suggests that the variations in the Earth's orbit around the sun, known as Milankovitch cycles, have a relatively minor impact on the Earth's climate.

Recent research indicates that the variations in the Earth's orbit proposed by Milankovitch, including eccentricity, axial tilt, and precession, play a secondary role in influencing the Earth's climate compared to other factors. While Milankovitch cycles have been recognized as drivers of long-term climate variations over thousands of years, their direct influence on shorter-term climate change has been found to be limited. Other factors, such as greenhouse gas concentrations, solar activity, volcanic eruptions, and oceanic oscillations, have been identified as more dominant drivers of climate change in the shorter term. Multiple lines of evidence support the idea that Milankovitch cycles alone cannot explain the observed climate changes. Paleoclimate records show that past climate variations often deviate from the predicted patterns based solely on Milankovitch cycles. Additionally, advanced climate models that incorporate a wide range of factors, including greenhouse gases and aerosols, are better able to simulate past and present climate changes than models relying solely on Milankovitch cycles. While Milankovitch cycles are still considered important for understanding long-term climate change, recent evidence suggests that their influence on shorter-term climate variations is relatively limited compared to other factors.

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Answer:

at the top of the ramp before dropping in

Explanation:

Potential energy is basically the build up of energy before it's released.

Answer:

firts divide then multiply divide again and your and your answer should d

bullet points are for week people got to have more heart

The scale will read 8,996 N during the acceleration.

The force applied to the woman by the scale is the sum of her weight and the weight of the elevator and scale (66.0 kg + 784 kg = 850.0 kg). This can be calculated using the equation

Force = Mass x Acceleration (F = ma).

The acceleration is given by the force applied (9030 N) divided by the total mass (850.0 kg), which gives a result of 10.6 m/s2.

We then multiply this acceleration by the mass of the woman (66.0 kg) to get the force applied to the woman by the scale, which is 696 N.

We then add this to the weight of the elevator and scale (784 kg) to get the total force that the scale reads, which is 8,996 N.

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The temperature which is lowest among these given values will be 270K, which means option B is the right answer.

Temperature is defined as the degree of hotness or coldness of an object. It means that the amount of energy which is stored in it to increase its degree of hotness.

In the given problem, the values are given in different systems. So to determine that which one is smaller, first we convert them into Celsius, so that all the units are same.

The relation between Fahrenheit and celcius is given as follows:

Temperature in celsius = 5/9(temperature in Fahrenheit - 32)

∴ Temperature in celsius = 5/9(32 - 32) = 0 Celsius

The relation between Kelvin and Celsius is given as :

Temperature in Celsius = Temperature in Kelvin - 273.15

∴ Temperature in Celsius = 270 - 273.15 = -3.15 Celsius

273 K will be equal to 0 Celsius using above relation.

Hence all the values are equal to zero except 270 K which is negative, hence coldest.

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The force on the object is 0.822 N.

Forces affect the motion of objects. They can cause movement. You can also slow down, stop, or change the direction of objects that are already moving. We say that a force changes its velocity because it changes the speed or direction of an object. Remember that acceleration is a change in velocity. F= mdv / dt

So m= 2.74 kg and dv= 16.49-16.19 = 0.30.

If time is 1 second,

F=2.74*0.3

= 0.822N

Therefore, the force on the object is 0.822 N.

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Answer:

hypotenuse = 21.6cm

Explanation:

I have attached photo with working.

The statement is true. The tangential acceleration of an object on a rotating disk is directly related to the angular acceleration of the disk.

When the disk undergoes angular acceleration, there is a change in the tangential velocity of any object on the disk. This change in velocity results in a tangential acceleration. However, if the disk is not undergoing angular acceleration, there will be no change in the tangential velocity of the object, and therefore no tangential acceleration.

Angular acceleration is the rate at which the angular velocity of a rotating object changes over time. It is a measure of how quickly an object is changing its rotational speed. Mathematically, angular acceleration is defined as the time derivative of angular velocity:

α = dω/dt

where:

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A low platform set on wheels that can be brought onstage electronically or by stagehands is called a "rolling platform" or a "motorized platform."

A rolling platform, also known as a motorized platform, is a movable stage component that is designed to be easily transported and positioned on a theater stage. It consists of a low platform or deck mounted on wheels, allowing it to be moved smoothly across the stage. The platform can be controlled electronically, using mechanisms such as motors and remote controls, or manually by stagehands pushing or pulling the platform.

The purpose of a rolling platform is to provide versatility and flexibility in stage design and production. It allows for dynamic movement and positioning of actors, props, and set pieces during a performance, enhancing the visual and spatial aspects of a theatrical production. By incorporating rolling platforms into stage sets, stage designers and directors have the ability to create various scenic arrangements, change the spatial relationships between characters, and facilitate smooth transitions between scenes, adding depth and dimension to the overall staging of a play or performance.

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When two identical conducting spheres, one initially charged with Q and the other uncharged, are brought into contact, the final charge on each sphere will be Q/2.

When two identical conducting spheres are brought into contact, they will share their charge until they reach an equilibrium state. In this case, one sphere has an initial charge Q, while the other is initially uncharged.

When the spheres touch, the charges redistribute themselves in order to minimize the overall electrostatic potential energy. Since the spheres are identical, they will share the charge equally.

Thus, after the spheres come into contact, the total charge Q will be divided equally between the two spheres. Therefore, each sphere will end up with a charge of Q/2.

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If a gas and a liquid undergoes the same amount of heating, the gas will expand many times more than the liquid. This is because gases have lower densities and occupy more space than liquids, which allows them to expand more readily when heated. The amount of expansion will depend on the specific gas and liquid being considered, as well as the conditions under which they are being heated.

I hope that you liked my answers

Answer:

If a gas and a liquid undergo the same amount of heating, the gas will generally expand significantly more than the liquid. This is because gases have much lower density and higher thermal expansion coefficients than liquids, and therefore, they expand much more for a given temperature change.

The exact amount of expansion depends on the specific gas and liquid, the temperature change, and the pressure conditions, but it is typically several orders of magnitude greater for a gas than for a liquid. This difference in expansion behavior is one of the key characteristics of gases and liquids, and it has important implications for a variety of scientific and engineering applications.

Explanation:

if you kinda confuse just tell me

ALLEN

If a person pushed on the door to the left of the handle, they would need to use less force than if they used the handle.

The reason for this is that the handle provides a mechanical advantage over pushing directly on the door. When the handle is used, the force applied to it is multiplied by the mechanical advantage, which is the ratio of the distance through which the handle moves to the distance through which the door moves.

For example, if the handle moves the door a distance of 2 cm and the door moves a distance of 5 cm when pushed directly on it, the mechanical advantage is 2:5, or 0.4. This means that for every 0.4 units of force applied to the handle, the door moves 1 unit.

On the other hand, if the person pushed directly on the door, the force applied to it would be the same as the force applied to the door, without any mechanical advantage. In this case, the door would move 5 cm, not 2 cm, for every unit of force applied to it.

Therefore, the person would need to use more force if they pushed directly on the door than if they used the handle, because they would have to apply the same amount of force over a greater distance to move the door the same distance.  

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Given:Plasma is an ideal gas of electrons.(a) For isothermal compression, the thermal force density is given byVp = kT/V where k is the Boltzmann constant, T is the temperature, and V is the volume.

Substituting the value in the above equation, we get

Vp = kT/Vp = kT/V

For isothermal compression, the temperature remains constant.

Therefore, the thermal force density Vp for an isothermal compression is given by

Vp = kT/V.

(b) For adiabatic compression, the thermal force density is given by

Vp = kT/Vγ

where γ is the adiabatic index.

For an adiabatic compression where p > i, we have

γ = Cp/Cv

where Cp is the specific heat at constant pressure and Cv is the specific heat at constant volume.

For an ideal gas, Cp = (γ/γ-1) R and Cv = (γ/γ-1 -1)R,

where R is the gas constant.

Substituting the above values, we getγ = (Cp/Cv) = (γ/γ-1)/((γ/γ-1 -1)) = (5/3)

For adiabatic compression, the temperature is related to the volume by

T V∧γ-1 = constantor

Vp = constant

Substituting the value of γ in the above equation,

we get Vp = constant/V5/3

Thus, the thermal force density Vp for an adiabatic compression where p > i is given by

Vp = constant/V5/3.

In conclusion, the thermal force density Vp for an isothermal compression is given by Vp = kT/V. For an adiabatic compression where p > i, the thermal force density Vp is given by Vp = constant/V5/3.

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Convection differs from radiation in the sense that in radiation, matter is not involved. Option D.

The term heat transfer has to do with the movement of heat from one point another. Recall that heat transfer is one of the things that does occur in nature. There are three kinds of heat transfer that occur in nature and these are;

Let us recall that in the process of convection, there is the movement of heat from one point to the other via the actual movement of the particles of the substance.  On the other hand, radiation occur when heat is transferred without an movement or contact between the objects  between which the heat is transferred. Thus, when air masses are moving, it is a process of convection taking place.

Hence, the difference between conduction and radiation is that matter is involved in convection but not in radiation.

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The intensity level of the sound at a distance of 15 m from the pneumatic drill is approximately 30.41 dB.

To calculate the intensity level in decibels (dB), we can use the formula:

I_level = 10 * log10(I/I0)

Where I is the sound intensity and I0 is the reference intensity, which is typically set at 1.0 × 10^(-12) W/m².

Given that the sound intensity is 0.0011 W/m², we can calculate the intensity level as follows:

I_level = 10 * log10(0.0011/1.0 × 10^(-12))

I_level = 10 * log10(0.0011) - 10 * log10(1.0 × 10^(-12))

I_level = 10 * (log10(0.0011) - log10(1.0 × 10^(-12)))

Using logarithmic properties, we can simplify the expression:

I_level = 10 * log10(0.0011 * 10^12)

I_level = 10 * log10(1100)

I_level ≈ 10 * 3.0414

I_level ≈ 30.41 dB

Therefore, the intensity level of the sound at a distance of 15 m from the pneumatic drill is approximately 30.41 dB.

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Answer:

:)

Explanation:

Answer:

C: Karl Schwarzschild correctly analyzed the relationship between the size of a black hole and its mass.

Explanation:

Karl Schwarzschild correctly analyzed the relationship between the size of a black hole and its mass. The correct option is C.

A black hole is an area of spacetime in which gravity is so powerful that nothing, not even light or other electromagnetic waves, can escape. According to general relativity theory, a sufficiently compact mass can bend spacetime to generate a black hole.

Karl Schwarzschild, a German physicist, was the first to "find" black holes. In 1915, he proposed a general relativity solution that was applicable to the simple (i.e., nonrotating, uncharged, and boring) example of a perfectly spherical object contained in otherwise empty space.

These suggestions are now known as the Schwarzschild radius and the singularity. Every item is allocated a Schwarzschild radius, which is determined by the object's mass. Gravity's behaviour begins to become strange within this radius.

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Therefore, the frequency of the wave is 10 Hz when it has wavelength of 10 meters.

Wavelength (λ) = 10 nm

Speed of the wave = 340 m/s

To find:

The frequency of the wave

Formula used:

N=v/λ

where

n is the frequency

v is the speed

λ is the wavelength

Step-by-step explanation:

n=340/10

n=10Hz

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Because of the reduced density of the hydrocarbon fluids and gases, oil and natural gas move from sedimentary source rocks to reservoir rocks after their production.

By implication, good reservoir rocks need to have high porosity and permeability. The term "natural gas" refers to a variety of gaseous hydrocarbons produced beneath the surface of the Earth and entrapped in the pores of sedimentary rocks.

Although not always, these natural gases have close ties to the various liquid hydrocarbons, primarily liquid paraffins, naphthenes, and aromatics, which together make up oil.

The following are some characteristics of the depositional environment that have an impact on sedimentary rock properties:

(1) Lithology: This term explains the minerals that make up the crystals that make up sedimentary rock as well as the texture of those crystals. This depositional environment is where these minerals are found.

(2) Structure. Rock can have a variety of structures, including cross-bedding and ripple markings that indicate the direction of wind and water flow.

(3) Fossil content. Sedimentary rocks include fossils that are imbedded in them.

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The acceleration of the roller coaster car is equal to 42.9 m/s².

The equations of motion of a moving object are the equation that described the relationship between acceleration, velocity, time, and displacement of an object.

The expression of the equations of motions can be written as shown below:

\(v= u +at\\S = ut +\frac{1}{2}at^2\\ v^2-u^2 =2aS\)

Given, the velocity at the top of the hill, u = 0

The distance covered by the roller coaster, S = 71 m

The time taken for the drop, t = 1.82 sec

The equation of motion: S = ut + (1/2) at²

71 = (0) (1.82) + (1/2)×a ×(1.82)²

a = 42.9 m/s²

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Answer:

The correct answer is B.

The astronaut will know due to the light from the explosion.

Explanation:

Sound and vibrations require a medium such as air to travel through. Space, there is no air. Only a vacuum. So sound and vibrations are unable to travel. Light requires no medium to travel. It can go through a vacuum.  

Therefore the Astronaut will see a bright flash of light as it travels from the explosion to outer space. It is also important to note that light can travel very far because nothing else interacts with its wave particles and as such, it cannot be impeded.

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Explanation:

In order from highest to lowest energies the parts of electromagnetic spectrum are named as

Gamma rays,

X-rays,

ultraviolet radiation,

visible light,

infrared radiation,

and radio waves.

Microwaves are a subsections of radio waves. They are used in microwave ovens to heat the food items.

This is expected EM spectrum in field of science.