plsss anyone help I BEG. its not that hard im just lazy and don't feel like thinking3

The velocity of the air flow at point (1) is 13.8 m/sec.  The gravitational potential energy is increasing from point(1) to point(2) by 94.176 joules. The pressure head increased by 1.7 m of air column. Kinetic energy head is decreased by 9.71 m of air column.  

Datum head at point (1), z₁ = 2 m

Datum head at point (2), z₂ = 10 m

Pressure at point(1) p₁ = 0 kpa

Pressure at point(2) p₂ = 20 N/m²

Velocity at point(2) v₂ = 0

Velocity at point(1) v₁ = ?

The density of air, ρ = 1.2 kg/m³

By applying Bernoulli's equation,

z₁ + p₁/ρg + v₁²/2g = z₂ + p₂/ρg + v₂²/2g

2 + 0 + v₁²/2g = 10 + 20/(1.2×9.81) + 0

v₁²/2g = 10 + 1.7 - 2

v₁² = 9.7×2×9.81

v₁² = 190.314

v₁ = 13.8 m/sec

Change in gravitational potential energy(ρgΔh) =  1.2×9.81×(10-2)

= 94.176 Joules

Increase in the pressure head = p₂/ρg - p₁/ρg

= 1.7 - 0

= 1.7 m (of air column)

Change in the kinetic energy head = v₂²/2g - v₁²/2g

= 0 - v₁²/2g

= - (13.8×13.8)/(2×9.81)

= -9.71 m (of air column)

Negative sign indicates that the kinetic energy head is decreasing.

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Answer:

A. The shorter a wire is, the lower resistance it will have.

The value of the coefficient of kinetic friction is 0.32.

The value of the coefficient of friction is calculated by applying Newton's second law of motion as shown below.

Ff = ma

where;

μmg cosθ = ma

μg cosθ = a

μ = a / ( g cosθ )

where;

The value of the coefficient of kinetic friction is calculated as;

μ =  ( 2.361 m/s² )  / ( 9.8 m/s² x  cos41 )

μ = 0.32

Thus, the value of the coefficient of kinetic friction between the block and the inclined ramp is a function of the acceleration of the block and the angle of inclination of the ramp.

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The work done during the process is  506.2 J.

The work done during the process is calculated by applying the following equation.

W = PΔV

W = P ( Vf - Vi )

where;

The final volume of the system is calculated as follows;

Vf = A x h

Vf = 7.4 x 10⁻³ m² x 7.2 x 10⁻² m

Vf = 5.33 x 10⁻⁴ m³

W = 9.5 x 10⁵ Pa x ( 5.33 x 10⁻⁴ m³ - 0 )

W = 506.2 J

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The energy that makes up a system's temperature, or thermal energy, is said to be present in the system.The required thermal energy is 2360J.

The energy that makes up a system's temperature, or thermal energy, is said to be present in the system.

Thermal energy is emitted as heat.Thermodynamics, a distinct field of physics, examines how work is accomplished via the transmission of heat between various systems (see the first law of thermodynamics).

Mass of aluminum  = 25g

Melting point  = 658°C

Latent heat of melting  = 94.4j/g

Unknown:

Amount of heat require for melting = ?

The amount of heat required for this melting will be the product of the mass of the aluminum and the latent heat of melting;

H = m L

m is the mass

L is the latent heat of melting

insert the parameters and solve;

H = 25 x 94.4 = 2360J

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When, During the game, the ball experiences a net force of 0 newtons. It is sitting still is the statement explains what is most likely happening with the ball.

The vector sum of the various or single forces exerted on a particle or object is termed as the net force. The original force's affect on the motion of the particle the force is exerted is replaced by the net force, which is a single force.

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Answer:

9 hours

Explanation:

When the 2nd car catches up to the first, both cars will have gone the same distance.  

Distance = rate x time

Distance car 1 traveled when car 2 catches up = 90 mph(3 hr + t)

Distance car 2 traveled when it catches up to car 1 = 120t

90(3 + t) = 120t

270 + 90t = 120t

30t = 270

t = 270/30 = 9 hrs

Therefore, 12 hours after car 1 leaves the city and 9 hours after car 2 leaves the same city, they meet up.  

To prove it:

90(12) = 120(9) = 1080    Car 2 catches up to Car 1 1080 miles from the city

The minimum value of the coefficient of static friction is 1.33.

To calculate the minimum value of the coefficient of static friction, we need to determine the force of static friction acting on the block. The force of static friction is equal to the force of gravity acting on the block (mg) multiplied by the coefficient of static friction (µs

m = 14.26kg

θ = 41°

g = 9.8 m/s²

The force of gravity acting on the block is given by the formula:

Fg = mg

where,

m =  (mass of the block)

g =  (acceleration due to gravity)

Fg = 14.26kg *9.8 m/s²

Fg = 139.75 N

The force of static friction can be found using the formula:

Fstatic = µs * N

where,

µs = coefficient of static friction (unknown)

N = Normal force acting on the block

The normal force acting on the block is equal to the force of gravity acting on the block perpendicular to the ramp.

N = mg * cos(θ)

where,

θ = 41 degrees (incline of the ramp)

N = 14.26kg * 9.8 m/s² * cos 41°

N = 105.47 N

So,

Fstatic = µs * (mg * cos(θ))

making µs subject of the formula and substituting already calculated vaues we get,

µs =      Fstatic

          (mg * cos(θ))

µs =    139.75 N

         105.47 N

µs = 1.33

This is the minimum value of the coefficient of static friction.

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The speed of the penny after 2.5 seconds is 25 m/s. The result is obtained by using the equation in uniformly accelerated straight motion.

A uniformly accelerated straight motion is a motion of an object moving with acceleration or deceleration in a straight line.

The equations apply in vertical dimension are

v₁ = v₀ + gt

v₁² = v₀² + 2gh

h = v₀t + ½ gt²

Where

A penny is dropped off the top of the Statue of Liberty, 93 m tall.

Find the speed of the penny after 2.5 second! (assuming no air resistance)

A dropping off penny has an initial speed of 0.

v₁ = 0

We used g = 10 m/s.

So, the speed at time t = 2.5 s would be

v₁ = v₀ + gt

v₁ = 0 + 10(2.5)

v₁ = 25 m/s

Hence, after 2.5 seconds, the penny will have the speed of 25 m/s.

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Answer:

should be false (F)

you don't have to, but I'd like brainliest if you can.

Explanation:

The amount of charge given that the energy transferred is 5.25 kilojoules and the voltage is 15 volts will be 0.35 coulombs.

Charge is a property of matter that describes the amount of electrical energy in a substance. It can be positive or negative, and it is measured in units called coulombs. Objects with the same charge will repel each other, while objects with different charges will attract each other. This is the basis of Coulomb's Law and for how electricity works.

The charge, measured in coulombs (C), can be calculated by using the formula:

charge = energy transferred / voltage

charge = 5.25 kJ / 15 V

charge =  0.35 C

Therefore the charge will be 0.35 coulombs.

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Answer:

False

Explanation:

False ... a mechanical wave needs a medium of particles to propagate....a vacuum has no particles

The object is traveling at 10 m/s.

Momentum is defined as the product of an object's mass and velocity. The formula for momentum is:

p=mv

where,

p = momentum

m = mass

v =  velocity

We can use this formula to find the velocity of an object given its momentum and mass. To solve for velocity, we can divide both sides of the equation by mass:

velocity = momentum/mass

In this case, the object has a mass of 40 kg and a momentum of 400 Kgm/s, so we can plug in these values to find the velocity:

velocity = 400 Kgm/s / 40 kg = 10 m/s

Therefore, the object is traveling at 10 m/s.

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slope is zero therefore velocity will be 0 at B to C .

The tangent component, as it always pulls the bob in the direction of equilibrium (and is not balanced by the tension from the pendulum arm).

Another mechanical mechanism that oscillates is the straightforward pendulum. It consists of a point mass "m" hung from a fixed support by a light, inextensible string of length L. The gravitational force is what causes the motion to move in a vertical plane.

The length and gravitational acceleration of a basic pendulum are the only factors that govern its period. Other elements, such mass, have no effect on the time at all.

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energy the top states in the nation for nuclear power electricity production is North Carolina. The contributions of natural gas-fired energy over the previous ten years.

nuclear energy Nuclear energy contributed for 33% of North Carolina's net generation in 2021, placing the state in the top five states for production. North Carolina was one of the top ten states in 2020 for both total annual motor fuel spending and petroleum consumption.

one of the main ways to produce energy is through the combustion of natural gas. Describe it in detail.Sunlight is the principal energy source on Earth's surface and can.As the effects of global warming worsen, North Carolina must go nuclear. Nuclear energy will become the best solution for clean, dependable, and economical electricity, and recent state legislation compels Duke Energy to dramatically cut carbon emissions by 2030.

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Impulse is important because it is the force that changes an object's momentum.

Momentum is a physical concept that describes the movement of an object due to the product of its mass and velocity. Momentum is a vector quantity, meaning it has both a magnitude and a direction. In classical mechanics, momentum is conserved, meaning that the total momentum of a system remains constant over time.

In the examples given, impulse is what allows the elevator to be hoisted up, the nylon ropes to hold a climber's weight, the runner to move around the track, and the plane to take off from the runway. Without impulse, none of these activities would be possible.

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the net impulse that acted on the ball =500 N.s if 100 kg ball is initially traveling at 10 m/s. If the ball experiences a constant external force that increases the ba velocity to 15 m/s .

The normal force acts in a direction normal to the surface interaction between objects. Friction is a force that opposes motion on surfaces. Other examples of non-fundamental forces include the elastic force, tension, and frame-dependent forces .

to make someone do something that they do not want to do, for example by using or threatening to use violence. force someone to do something: He claims that police officers forced him to sign a confession.

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The distance moved by an object when it acted by a net force 1 N and time 3s is found to be 0.9m

According to this, an object's rate of change in velocity is directly proportional to the force used and moves in the direction of the applied force. The equation: summarises it. Mass (kg) times acceleration (m/s2) equals force (N). A constant mass item will therefore accelerate in direct proportion to the force exerted.

F = ma

acceleration = F/m => 1/5

v= u + at, u=0 (initially at rest);

v=at = distance/t = at;

S = distance => ut + 1/2at^2

=> 0 + 1/2 x 1/5 x 9 => 0.9m

the distance traveled by object in the given time 3s = acceleration x t2

The acceleration is determined by dividing the net force by the mass. An object's acceleration doubles if the net force exerted on it also doubles. Increased mass will result in a halving of acceleration. If the mass and net force are both doubled, the acceleration will remain constant.

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A net force of 1.0 N acts on a 5.0-kg object, initially at rest, for 3.0 seconds. What is the distance the object moves during that time?

Some general tips for creating graphs include:

1. Choose the type of graph that best illustrates your data.

2. Organize your data in a way that makes sense and is easy to read.

3. Label your graph clearly so readers can understand what the graph is trying to convey.

4. Use colors and symbols to make the graph more visually appealing.

5. Use a grid to ensure that the graph lines are straight and even.

6. Double-check your graph to make sure all of the data is accurate.

What is graph?

Graph is a pictorial representation of data or information. It is a way of visually displaying data points in a way that is easy to understand and interpret. By using graphs, we can compare different sets of data, identify relationships between different data points, and easily spot trends and patterns.

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The force with which the planet is attracted to the 10 kg object is calculated to be 4 N.

Given that,

Mass of object = 10 kg

Gravitational field strength = 4 N/kg

Now, let us determine with what force the planet is attracted to the 10 kg object,

Mathematically, the force with respect to the gravitational field strength is given by the formula,

Force = mass × gravitational field strength

Force = 10 × 4

Force = 40 newton

We can conclude that the force with which the planet is attracted to the 10 kg object is 4 Newton.

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The Earth's gravitational pull on the satellite is 651.8 N. Consequently, the satellite's gravitational pull on Earth is 651.8 N. As a result, the spacecraft accelerates at a rate of 1.5 m/s2.

Centripetal force is used to maintain an object moving in a circle due to gravity. Since gravity always behaves perpendicular to motion, it has no effect on an item in a circular orbit.

Mass of Telescope= 8410 kg

revolution in minutes = 927

G = 6.67 × 10-11 N ∙ m2/kg2

Mass of earth = 6.0 × 1024 kg

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The wave property this padding is taking advantage is reflection, because reflected waves have a higher intensity.

option B is the correct answer.

The reflection of a wave occurs when a travelling hits a hard surface and it is directed backwards.

Also, the reflection of a wave is a process by which a wave, whether light, sound, infrared, or radio waves, hits an object and bounces off it.

An example of reflection of wave is echo.

An echo is a sound caused by the reflection of sound waves from a surface back to the listener.

Thus, to reduce the echo of a sound wave, the school cafeteria had thick padding installed along the walls and portions of the ceiling.

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The force that exists between the charges is calculated as 1.296 * 10^-18 N.

It is the force of attraction between two opposing charges, protons and electrons.

The electric force between charged bodies at rest is called electrostatic force or Coulomb force. Although the law was known earlier, but it was first published in 1785 by French physicist Charles-Augustin de Coulomb. It is the force of attraction between two opposing charges, protons and electrons.

Given, q1 = q2 = 6 *10^-6

and r = 0.5m

F= 1/4πc * q1 q2/r²

As 1/4πc = 9* 10^-9

= (9* 10^-9 * 6*10^-6*6*10^-6)/0.5²

= 1.296 * 10^-18 J

The force that exists between the charges is 1.296 * 10^-18 N.

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With the use of formulas, For the first question, W = 22.8 J, Time = 1.43 s. For the second question, W = 1000000J, P = 534,522.48 Watts

Power can simply be defined as the rate at which work is done. It is measured in Watt.

Given that a delivery man lifts a package with a 12 N force at a constant velocity. If the package is lifted from the ground to the mailbox 1.9 m and the delivery man exerts 16 W of power, then

a.  the work done W = F × S

W = 12 × 1.9

W = 22.8 J

b. The time taken to lift it can be found by using power formula

P = W/t

16 = 22.8/t

t = 22.8/16

t = 1.43 s

Given that a  2800 kg car exerts a constant force of 20,000 N while traveling across 50 m. Assume the car starts from rest.

a. Work W done by the car = F × S

W = 20000 × 50

W = 1,000,000 J

b. To know how much power is exerted by the car, let us first find the speed of the car.

K.E = Work

1/2mv² = F × S

1/2 × 2800 × v² = 1000000

1400v² = 1000000

v² = 1000000/1400

v² = 714.28

v = √714.28

v = 26.7 m/s

Power P = F × V

P = 20000 × 26.73

P = 534,522.48 Watt

Therefore, the power exerted by the car is 534,522.48 Watts

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Answer:

Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun.

When a car has double the speed of the truck

Momentum is calculated by multiplying the mass by the velocity. And we have masses of 1000 kg and 2000 kg and to make the momentum equal velocity needs to be inversely proportional.

Let the velocity of the car be x m/s

momentum (p) = mass * velocity

then momentum is 1000*x

1000x kgm/s

So lets the velocity of the truck be y m/s

the momentum of the truck will be 2000*y

so 2000y kgm/s

by the condition 1000x = 2000y

so on solving

x= y/2

which shows the car has double the velocity of the truck.

So we can conclude to greater momentum we need either velocity or mass needs to be greater or both can be also large to get higher momentum.

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D. 36 in Kr

Let's analyze all the elements in Option

By looking at all the given options we can clearly see that Krypton has the highest number of electrons as compared to the given options so It is the answer. Also with the highest mass, in the given four options.

It can be easily seen in options as the Number of electrons and mass is already written in options.

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