A ball of mass 200 g rolls along the ground at a speed of 5.2 m/s. Calculate the kinetic energy of the ball. Give your answer to one decimal place.

In a fire piston, the temperature of the gas inside the piston increases due to adiabatic compression.

In physics, pressure is a measure of the force per unit area that a fluid (liquid or gas) exerts on its surroundings. It is defined as the force F acting perpendicular to a surface divided by the area A over which the force is distributed: pressure = F/A. The SI unit of pressure is the Pascal (Pa), which is defined as one Newton per square meter (N/m²). Other common units of pressure include pounds per square inch (psi), atmospheres (atm), and bar (bar). Pressure is an important concept in many areas of physics, including fluid mechanics, thermodynamics, and atmospheric science. It describes the behavior of fluids in pipes and channels, the operation of hydraulic systems, and the behavior of gases in sealed containers. The pressure of a fluid is related to its density and temperature, and can be influenced by factors such as gravity, elevation, and the motion of the fluid itself.

Here,

When the piston is rapidly pushed down into the cylinder, it compresses the gas inside the cylinder. This rapid compression causes the gas molecules to collide with each other more frequently and with greater force, which in turn increases the temperature of the gas.

Because the compression is adiabatic (i.e., no heat is allowed to enter or leave the system), the increase in temperature is due solely to the work done on the gas by the piston. This increase in temperature is known as adiabatic heating.

The fire piston is a simple but effective tool for starting a fire in the wilderness, and it demonstrates the principles of adiabatic compression and the relationship between pressure, volume, and temperature in a gas.

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Explanation:

Efficiency is defined as the ratio between the useful output over the total amount consumed. \(E = \frac{useful}{total}\)

The fan does 500W of useful work while wasting 300 W. The total power consumption is 800 W (500 + 300).

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Explanation:

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Answer:

Explanation:

When a white dwarf star collects matter from a neighboring star, fusion reactions on the surface of the white dwarf cause an increase in temperature and pressure.

This increase in temperature and pressure triggers fusion reactions between the collected matter and the material on the surface of the white dwarf. This can lead to an explosive event known as a nova or, in more extreme cases, a type Ia supernova. This event results in a sudden increase in brightness and the release of a significant amount of energy.The fusion reactions release enormous amounts of energy, which is visible as a bright burst of light.

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Answer:

B. pharynx

Explanation:

The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air.

Brainlist pls!

The pharynx chamber functions in the digestive system as well as the respiratory system.

The hollowed cylindrical tube or pipe within the throat, which begins while behind nostrils or nasal system, terminates on the upper edge of something like the windpipe as well as the esophagus, is termed as Pharynx.

The other given options such as:

These three approaches are not related to the given scenario. So the above answer is correct.

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The velocity before the object hits the ground is not zero due to acceleration due to gravity.

We know that the object that is thrown up would experience the force of gravity that acts on it. As the object is moving up, there is a decceleration due to gravity that acts on the object and the velocity of the object would eventually get to zero at the maximum height.

When the object is coming down, the object would be accelerated due to gravity such that the velocity of the object would begin to increase again and it would hit a maximum when the object falls to the ground.

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Answer:

Explanation:

It can be increased by: increasing the rate of rotation. Increasing the strength of the magnetic field. Increasing the number of turns on the coil.

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Answer:

Momentum, product of the mass of a particle and its velocity. ... Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.

Answer:

True

Explanation:

an object in motion stays in motion unless acted upon by another force

Answer/Explanation:

True. A force is what causes a movement in the first place. In order for an object to change motion a different force must be applied such as its opposing force.

Natural force: Thrust

Opposing force is drag.

Other forces are gravity and lift.

The opposing force will reverse the motions direction, the other forces will just change the direction without reversing.

Answer:

It makes it more difficult to move, making it stretch and exercise your muscles better becuse there is a resistant force to overcome.

Explanation:

-Sky :3

Answer:

It keeps sweat out of your eyes, because it absorbs it.

Explanation:

Sweat is still liquid, and plus if you pay extra and can even have some sort of cooling gel.

Sky is also correct.

Answer:

\(v_f=9,07~m/s\)

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes uniformly in time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

The car initially travels at vo=7.35 m/s and accelerates at a rate of \(a=0.824~m/s^2\) during t=2.09 s.

The final velocity is:

\(v_f=7.35+0.824*2.09\)

\(\mathbf{v_f=9,07~m/s}\)

Answer:

true

Explanation:

The velocity of the ion released from rest and accelerated through a potential difference of 152V is 6.34 × 10^5m/s.

The electric potential difference is a scalar quantity that measures the energy required per unit of electric charge to transfer the charge from one point to another. The electric potential difference between two points in an electric circuit determines the direction and magnitude of the electric current that flows between those two points. A lithium-ion containing three protons and four neutrons has a mass of 1.16 × 10-26 kg. The ion is released from rest and accelerates as it moves through a potential difference of 152 V.

The change in electric potential energy of an object is equal to the product of the charge and the potential difference across two points. The formula to calculate the velocity of the ion released from rest and accelerated through a potential difference of 152V is:

v = √(2qV/m) where q is the charge of the ion, V is the potential difference, and m is the mass of the ion.

Substituting the values in the formula, we get:

v = √(2 × 1.6 × 10-19 C × 152 V/1.16 × 10-26 kg)v = 6.34 × 10^5m/s

Therefore, the velocity of the ion released from rest and accelerated through a potential difference of 152V is 6.34 × 10^5m/s.

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The acceleration of the car after leaving the pit to reach a speed of 75 m / s in 9 s is 8.3 m / s²

a = v / t

a = Acceleration

v= Velocity

t = Time

v = 75 m / s

t = 9 s

a = 75 / 9

a = 8.3 m / s²

Acceleration is the rate of change of velocity with respect to time. It is denoted as a.

The given question is incomplete. The complete question is:

At an international auto race, a race car leaves the pit after a refueling stop and accelerates uniformly to a speed of 75 m/s in 9 s to rejoin the race. What is the race car's acceleration during this time?

Therefore, the acceleration of the car after leaving the pit is 8.3 m / s²

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Answer:

Sound and light are similar in that both are forms of energy that travel in waves.

Explanation:

They both have properties of wavelength, freqency and amplitude. ... Sound can only travel through a medium (substance) while light can travel through empty space. Sound is a form of mechanical energy caused by vibrations of matter.

Answer:

When light moves from one medium (like air) to another medium (like water) it will change directions. This is a "wave-like" behavior and is called refraction. In this way light behaves like other waves such as sound waves. The speed of the light wave also changes when it moves from medium to medium.

Explanation:

Answer:

Though the process photosynthesis

Explanation:

One of the important ways by which the atmosphere recycle gases through interactions with the the biosphere is by photosynthesis.

The biosphere is the living component on the earth. The atmosphere is the gaseous envelope round the earth.

This way, there is a sustained interaction between the atmosphere and biosphere.

Answer:

B. Through the process photosynthesis

Explanation:

:)

The number of ring particles in Saturn's rings if total mass of material in Saturn's rings is about 10¹⁸ kg is 6.67 * 10¹⁷

ρ = m / V

ρ = Density

m = Mass

V = Volume

ρ = 1000 kg / m³

r = 6 cm = 0.06 m

V = 4 / 3 π r³

V = 4 / 3 * 3.14 * ( 0.06 )³

V = 0.015 m³

m = ρ V

m = 1000 * 0.015

m = 15 kg

The total mass of Saturn's ring is 10¹⁸ kg

Mass of one particle of a Saturn ring = 15 kg

Total number of particles = 10¹⁸ / 15

Total number of particles = 6.67 * 10¹⁷

Therefore, the number of particles is 6.67 * 10¹⁷

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The height of the bridge above the water is 12.1 m. The given information are,The initial velocity of the stone, u = 10 m/sThe final velocity of the stone, v = 30 m/s. Using the formula for velocity change, we can find the time taken by the stone to travel from the initial velocity to final velocity.

V = u + gtt = (v - u) / g Here, g = acceleration due to gravity = 9.8 m/s²= (30 - 10) / 9.8= 2.04 s The height of the bridge above the water is given by the formula, s = ut + 1/2 gt² Substitute the values and get the answer. s = 10 × 2.04 + 1/2 × 9.8 × (2.04)²= 20.4 + 21.7= 42.1 m. The height of the bridge above the water is 42.1 m.

The stone narrowly misses the bridge on the way back down. Therefore, the height of the bridge is equal to the maximum height of the stone from the point of projection to the highest point it reaches. So, the height of the bridge above the water = maximum height of the stone = 42.1 - 30= 12.1 m Thus, the height of the bridge above the water is 12.1 m.

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Given,

Voltage, V=9 V

Resistor, R=50.0 ohm

To find

The power emitted by the battery.

Explanation

The power is:

Conclusion

The power is: C.1.62W

Vowels are pronounced from back to front, increasing the frequency of the second formant. For front vowels like I and rear vowels like [u], the second formant (f2) is more frequent than the other.

The number of a wave's oscillations per unit of time, expressed in hertz, is what is known as frequency (Hz). The relationship between pitch and frequency is straightforward.

When describing the temporal rate of change seen in oscillatory and periodic phenomena like mechanical vibrations, audio signals (sound), radio waves, and light, frequency is a crucial metric utilized in science and engineering.

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Answer:

27km.

Explanation:

Jessie will run for a duration of time, which is the time it takes for Melissa and Rory to meet each other.

Together combined, Melissa and Rory runs at 14km/h. The bike trail is 21km, so it will take 1.5 hours.

Jessie runs at 18km/h, so Jessie will run 18 * 1.5 = 27km.

Excess charge must be placed on a copper sphere = 4.167 x 10^(-8) C

The potential is the same within and equal to the potential outside, as if the charge were concentrated in the center, at all places. At infinity, there is no potential.

From the question, we have

kq/r = 1.5 x 1000

q = 1500r/k

= 1500*(0.25)/9x10^9 C

= 4.167 x 10^(-8) C

Electric potential :

The amount of work required to convey a unit of electric charge from a reference point to a given place in an electric field is known as the electric potential (also known as the electric field potential, potential drop, or the electrostatic potential).

Complete question:

How much excess charge must be placed on a copper sphere 25.0 cm in diameter so that the potential of its center, relative to infinity, is 3.75 kv?

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The EMF of the battery is 57.8 V and its internal resistance is 2.89 Ω.

EMF = V + Ir

EMF = (V1I2 - V2I1) / (I2 - I1)

where V1 and I1 are the voltage and current at one point, and V2 and I2 are the voltage and current at another point.

r = (V1 - EMF) / I1

Using the values given in the problem, we get:

EMF = (46.0 V * 2.56 A - 37.1 V * 7.12 A) / (2.56 A - 7.12 A) = 57.8 V

r = (37.1 V - 57.8 V) / 7.12 A = 2.89 Ω

EMF stands for electromagnetic field. It refers to the physical field produced by electrically charged objects in motion, such as electrically charged particles, electromagnetic radiation, or magnetic fields. EMF is a fundamental aspect of nature and is present all around us, from the Earth's magnetic field to the radio waves used for communication.

EMF can have both positive and negative effects on living organisms, depending on the frequency and intensity of the field. For example, EMF is used in medical imaging techniques such as MRI machines, but excessive exposure to EMF from sources such as high-voltage power lines or cell phones has been associated with health risks. The study of EMF and its effects on living organisms is an active area of research, and scientists continue to explore its potential applications and risks.

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Answer:

That they must die

Explanation:

Stick = Die

The freezing of water is not spontaneous above 0 degrees Celsius because it requires energy to break the hydrogen bonds between the water molecules.

At temperatures above 0 degrees Celsius, the kinetic energy of the water molecules is high enough to prevent the formation of a stable ice crystal lattice.

As the temperature decreases, the kinetic energy decreases and the hydrogen bonds become stronger, allowing the water molecules to arrange themselves into a stable lattice structure and freeze.

Thus, the process of freezing water above 0 degrees Celsius is not spontaneous as it requires an external source of energy to break the hydrogen bonds and initiate the formation of a stable ice crystal lattice.

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Answer:

Matter can exist in four different states: solids, liquids, gases and plasma.

Explanation:

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Objects have the same velocity only if they are moving at the same speed and in the same direction.

Objects moving at different speeds, in different directions, or both have different velocities.

When two bodies are moving in opposite directions, relative velocity between them is equal to sum of the velocity of bodies.

But if the bodies are moving in same direction their relative velocity is equal to difference in velocity of the bodies.

Relative velocity is defined as the velocity of an object B in the rest frame of another object A. 2) A motorcycle travelling on the highway at a velocity of 120 km/h passes a car travelling at a velocity of 90 km/h.

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Yes, the steel ball will move. When the ball is placed between two magnets of equal strength, the forces exerted by the magnets on the ball cancel each other out, resulting in no net force acting on the ball.

However, the magnetic field lines from each magnet create a torque on the ball, causing it to rotate. This rotational motion occurs as the ball aligns itself with the magnetic field lines. The magnetic forces acting on the steel ball arise due to the interaction between the magnetic field of the magnets and the magnetic properties of the ball. While the ball does not experience a net force in a particular direction, it undergoes rotational motion due to the torque induced by the magnetic field lines. As a result, the ball will rotate until it aligns itself with the magnetic field, but it will not experience translational motion.

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