Define simple machine, and identify 6 types

Explanation:

Force= mass × acceleration

= 3.6 × 4.2

= 15.12N

If the mass of the box is 3.6 kg and it is accelerating with 4.2 m/s², then the force exerted on the box is 15.12 N.

The definition of force is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends. Only when there is interaction do forces actually exist.

The strong force, weak force, electromagnetic force, and gravitational force are the four fundamental forces operating in the universe. The formula of force is  Force = mass × acceleration.

Hence, if the mass of the box is 3.6 kg and it is accelerating with 4.2 m/s², then the force exerted on the box is 15.12 N.

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In the absence of air friction, an object dropped near the surface of the Earth experiences a constant acceleration of about 9.8 m/s2, so the speed of the object increases 9.8 m/s during each second.

The speed of the object increases 9.8 m/s during each second the acceleration means the change in velocity per second.

Gravity can be explained as a force such that controls the movement of the planets such as Earth around the Sun, hold stars grouped in galaxies together, and galaxies grouped in clusters.  

The gravity which is generally near the Earth's surface makes it possible for all physical objects to possess weight and experience a free fall.

Generally, the acceleration due to gravity for an object experiencing a free fall near the Earth's surface is 9.8 m/s2.

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The Correct option is D which is 0.1kg .

It can be challenging to calculate the air mass in a CATA bus's passenger compartment. It will most likely just weigh a few tenths of a kilogramme or perhaps less, which is exceedingly little.

This is because, in relation to the size of the bus itself, the volume of air inside the passenger compartment of a bus is rather low. Additionally, even a small volume of air will have a comparatively modest mass since the density of air at normal atmospheric pressure is extremely low.

The frequent interchange of air through open doors and windows would be another element that might contribute to the small mass of air inside a bus.This would mean that the air inside the bus is not stagnant and is constantly being replaced by the air outside which would lead to a decrease in mass. The answer would be D)0.1 kg

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Compared to the magnitude of force required to stop the car in 12 seconds, magnitude of the force required to stop the car in 6.0 seconds is : (3) the same.

In physics, force is an influence that changes the motion of an object.

Force is : F = m * a, where m is mass of the object and a is acceleration.

Given, distance traveled is zero (the car stops), the initial velocity is 20 m/s and time is 12 seconds.

As, d = vt + (1/2)at^2

So, a = 2d/t^2 - v^2/d

a = 2*0/(12^2) - (20^2)/0 = 0 - 400/0 = undefined

a = 2*0/(6^2) - (20^2)/0 = 0 - 400/0 = undefined

As acceleration is undefined in both case, we say that the force required to stop the car in 6.0 seconds is same as force required to stop the car in 12 seconds.

So, answer is (3) the same.

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The speed of each seat is 3.2 m/s.

The speed of each seat is calculated by applying Newton's second law of motion as shown below.

T cos (θ)  = mg

T sin (θ) = mv² / r

where;

T  = mg / cos(θ)

T = ( 10 x 9.8 ) / ( cos 15.9 )

T = 101.9 N

The speed of each seat is calculated as;

v² = (Tr sin(θ) ) / m

v = √ [ (Tr sin(θ) ) / m ]

v = √ [ (101.9 x 3.6 x  sin(15.9) ) / 10 ]

v = 3.2 m/s

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Minimum: 75.64; maximum: 48.36 is the nearest hundredth unless otherwise noted.

The given values of n and p to find the minimum usual value and the maximum usual value μ

−2σ

n = 248, p = Detailed explanation:

Considering the characteristics of the binomial distribution

n = 248, p = 4/5

To determine the necessary values, we must determine the mean and the standard deviation.

The steps are listed below.

Identify the mean.

μ = n·p = 248*(4/5) = 570.4

Find the variation in 2.

σ² = np(1 - p) = 248*(4/5)*(1 - 4/5) =

Discover the standard deviation in 3.

Minimum: 75.64; maximum: 48.36

Minimum: 75.64; maximum: 48.36 the nearest hundredth unless otherwise noted.

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If the value of g were reduced to g/6, then the equation for the time it takes for the ball to return to its original height would become t = 2v/(g/6), or t = 12v/g. Since the original equation is t = 2v/g, the new equation is 6 times greater, so the time t would be 6 times greater than before.

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The ideal speed to take a 75 m radius curve banked at a 10.0° angle is 21.82 m/s.

The formula for the maximum vehicle velocity on banked roads can be used to determine the banking angle. The equation for the angle of banking, t a n = v 2/ r g, is obtained by squaring the equation on both sides and rearrangement.

The curved path's banking angle is given as

tan θ = v² / rg

Here, v is the linear speed, r is the curved path's radius, is the bank angle, and g is the acceleration brought on by gravity.

θ = 10.0°, r = 75 m, and g = 9.8 m/s2 are our values.

By replacing these numbers in the formula above, we obtain

tan 10 = v2 / 75m × 9.8m/m/s²

v² = 476.54

v = √476.54 = 21.82 m/s

Thus, 21.82 m/s is the optimal speed.

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According to legend, young Isaac Newton came up with first law of gravity after getting hit on the head by a piece of fruit that had fallen from an apple tree while he was sitting underneath it.

Newton's gravitational law states that every piece of matter in the universe is drawn to every other piece with a force than varies directly with the mass-to-mass ratio and inversely with the distance between them.

The product of the masses of two objects multiplied by two is the gravitational force between them. The gravitational pull here between objects will also triple if one of them triples in mass. When two objects' masses double, for example, the gravitational force between them is multiplied by two, and so on.

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The period if it oscillates on simple harmonic motion is determined by the value to be 0.1256 seconds.

Harmonic motion is the motion that an oscillating mass undergoes when the restoring force is proportionate to the displacement but acting in the opposite direction. A sine wave with a constant magnitude and frequency can be used to illustrate harmonic motion because it is periodic. A weight bouncing on a spring is an illustration of this.

Harmonics are the outcome of nonlinear loads converting AC voltage level to DC. Because of nonlinear electrically controlled components like computer power supply, energy-efficient lighting, and variable-frequency drives (VFDs), harmonics enter the electrical system.

The force constant of the spring,

So,

K =  f/x

   = (1 x 10)/0.2

    = 50 N/m

Now, if the mass of 1 kg is suspended by the spring, then the period of oscillation,

T = 2π√(m/k)

T = 2π√(1/50)

T = 2π * 0.02

T = 0.1256s

the value to be 0.1256 seconds.

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According to collision theory, the quantity of reactant molecule collisions determines how quickly a chemical reaction proceeds. The pace of reaction increases with the frequency of reactant-molecule collisions.

The average pace of particles increases with temperature, which increases the rate of particle collisions. The average kinetic power of collisions increases with temperature, increasing the proportion of collisions that require the least amount of energy to react.

Reactant particles need to have a certain minimum energy in order to make an efficient collision. The activation energy is the energy that starts the reaction.

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The road force on the wheel weigh is 690.

Your automobile advances under the influence of static friction. The power to turn the tires is provided by the engine, which pushes the vehicle rearward against the road.

Example:

The axle of the wheel that is in touch with the road receives a 200 mN torque from a car's engine.

The vehicle moves rightward at a steady speed:

The automobile wheel measures 0.58 meters in diameter. What does the horizontal component of the road force on the wheel weigh?

Radius: 0.29 m

When formula is used, we obtain

Force = Torque / Radius = 200/0.29

=690.

It is the necessary response as a result.

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The initial elastic potential energy of the block-spring system is 17.88 joules. The final speed of the block is approximately 3.15 meters per second.

Elastic potential energy is energy stored in an object as a result of application of a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape and size, doing work in the process.

By applying Hooke's law and definition of work, we define the elastic potential energy (Ug), measured in joules, by the following formula:

Ug = 1/2 × k × x²

where, k = Spring constant, measured in newtons per meter

x = Deformation of the spring, measured in meters

If we know that k = 795 N/m and x = 0.045m, then the elastic potential energy is:

Ug = 1/2 × 795 × 0.045

Ug = 17.88 Joules

The initial elastic potential energy of the block-spring system is 17.88 joules.

b) According to the Principle of Energy Conservation, the initial elastic potential energy of the block-spring system becomes into translational kinetic energy, that is:

Ug = 1/2 × m × v²

where, m = Mass measured in kilograms,

v = Final speed, measured in meters per second.

Then, the final speed is cleared:

v = [tex]\sqrt{2Ug/m}[/tex]

If we know that Ug = 17.88 Joules and m = 3.60kg, then the final speed of the block is:

v = √(2 × 17.88J)/ 3.60kg

v = 3.15m/s.

The final speed of the block is approximately 3.15 meters per second.

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Answer:

Yes

Explanation:

By adding salt.

Imagine, if you are traveling toward a black hole. The time that time dilation is likely to occur is option A: when you approach the event horizon.

The event horizon is the boundary around a black hole beyond which nothing, including light, can escape. As an object approaches the event horizon, the gravitational pull becomes stronger. This causes time to slow down for the object, a phenomenon known as time dilation.

The effect becomes more pronounced as the object gets closer to the singularity, the central point of the black hole where the gravitational pull becomes infinitely strong.

Crossing a wormhole, which is a hypothetical passage through space-time connecting distant points, would also experience time dilation, but it is different than the one that occurs near a black hole.

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Two stationary point charges of unknown magnitude and sign are isolated from other charges. If electric field strength is zero at midpoint of  line joining them, following can be concluded about charges : They are equal in magnitude but opposite in sign.

The electric field is a vector field that describes the force experienced by a test charge placed in the field. The direction of the electric field is given by the direction of the force experienced by the test charge and its magnitude is given by the force experienced per unit charge.

Electric field at the point due to point charge ;

E = k * (q/r^2) * r_unit

where k is Coulomb's constant, q is the charge, r is the distance from the point charge, and r_unit is the unit vector pointing from the point charge to the point where the electric field is being calculated.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: Two stationary point charges of unknown magnitude and sign are isolated from all other charges. if the electric field strength is zero at the midpoint of the line joining them, which of the following can be concluded about the charges?

They are equal in magnitude but opposite in sign.

They are equal in magnitude and sign.

They are not equal in magnitude and opposite in sign

They are not equal in magnitude but same sign.

The power supply that technician should use 500 W.

A power supply is a component that transforms the output of an ac power line into one or more constant dc outputs. A smooth voltage is created by filtering the ac voltage after it has first been rectified to create a pulsing dc. In spite of fluctuations in the ac line voltage or circuit loads, the voltage is finally regulated to produce a consistent output level.

The power use of the server as whole is,

100 W+ 5×9 W + 200 W

Power use=445 W.

So, the power should be more than the 445 W in order that there should not be any short circuit.

and from all the given options the power supply that is feasible is 500 W.

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500 W of power should be used by the technician.

One or more consistent dc outputs are produced from an ac power line's output by a component known as a power supply. After rectifying the ac voltage to produce a pulse dc, a smooth voltage is produced by filtering the result. Despite changes in the ac line voltage or circuit loads, the voltage is eventually controlled to create a constant output level.

The entire server's energy consumption is,

100 W+ 5×9 W + 200 W

Using 445 W of power.

Therefore, the power must be more than 445 W to prevent short circuits.

Choose the power supply that is practical from the possibilities presented

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At the surface of Earth, the ambient atmospheric pressure is 1013254 Pa. The weight of the atmosphere on Earth is 5.322 * 1016 kg.

The magnitude of force applied to a certain region is referred to as pressure. So either a strong force or a strong force applied over a short area can cause a lot of pressure (or do both).

The atoms and molecules that comprise the many layers of the atmosphere are continually moving in arbitrary directions. Despite their modest size, when they hit a surface, they apply pressure that humans perceive as a force.

atmospheric pressure = 1013254 Pa

radius of Earth = 6.4 * 10⁶ m

gravity = 9.8 m/s²

surface area of a sphere = 4π radius²

surface area of earth = 4 * 3.14 * ( 6.4 *10⁶ )²

= 5.14719 * 10¹⁴ m²

mass of the atmosphere = ( 1013254 pa * 5.14719 * 10¹⁴ m²) / 9.8

= 5322 * 10 ¹⁶ gm

= 5.322 * 10¹⁶ kg

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The government derive its power according to the Declaration of Independence is the document that declare the freedom of the people. The document was approved by the Continental Congress on July 4, 1776.

Below are the main messages of the declaration of independence.

(1) God made all men equal and gave them the rights of life, liberty, and the pursuit of happiness.

(2) The main business of government is to protect these rights.

(3) If a government tries to withhold these rights, the people are free to revolt and to set up another government.

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A box slides down a frictionless ramp, then it takes approximately 0.87 seconds for the box to reach 1.00 m/s.

The force resisting relative motion of solid surfaces, fluid layers, and material elements sliding against each other is called friction.

As, v^2 = u^2 + 2as

Given, v = final velocity = 1.00 m/s ; u = initial velocity = 0 m/s (since the box is at rest) ; a = acceleration due to gravity = 9.8 m/s^2 and s = distance covered = 1.00 m

So, s = 1.00 m = x x sin(40.0 degrees)

x = 1.00 m / sin(40.0 degrees)

(1.00 m/s)^2 = 0^2 + 2(9.8 m/s^2) (1.00 m / sin(40.0 degrees))

t = √((1.00 m/s)^2 - 2(9.8 m/s^2) (1.00 m / sin(40.0 degrees)) )/ (2(9.8 m/s^2))

Hence, t ≈ 0.87 sec

It takes approximately 0.87 seconds for the box to reach 1.00 m/s.

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Through the decomposition of organic matter, CO₂ is released into the atmosphere as part of this natural process.

One carbon atom is covalently doubly bound to two oxygen atoms in each of the molecules that make up carbon dioxide, which has the chemical formula CO 2.

At room temperature, it exists as a gas. In the atmosphere, carbon dioxide serves as a greenhouse gas because it absorbs infrared radiation despite being transparent to visible light. It has increased from pre-industrial levels of 280 ppm to a trace gas in the Earth's atmosphere at 421 parts per million (ppm), or roughly 0.04% by volume (as of May 2022).

The fundamental driver of both these elevated CO2 concentrations and climate change is the burning of fossil fuels. Groundwater, lakes, ice caps, and ocean all contain dissolved carbon dioxide. 

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When a person standing at the edge of a cliff throws one ball straight up and another ball straight down, each at the same initial speed, neglecting air resistance, the ball that hits the ground below the cliff with the greater speed is the ball that was thrown straight up.

The acceleration due to gravity is the acceleration that is produced in an object due to the gravitational force of the earth acting on the object.

The velocity of an object depends on the acceleration due to gravity and the height above the ground of an object as given below:

Velocity = √2gh

where;

g is the acceleration due to gravity

h is the height above the ground

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When a wave travels through a medium, the particles in that medium vibrate in a direction perpendicular to the direction the wave travels it is a transverse mechanical waves only.

When a wave travels through a medium, the particles in that medium vibrate in a direction parallel to the direction the wave travels it is a longitudinal mechanical waves only .

Then a wave travels through a medium, the wave speed will depend on an inertial property of that medium it is for both transverse and  longitudinal mechanical waves .

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The amount it take to run the compressor if the electricity cost 22 cents per kilowatt-hour is 233.21 cents.

A kilowatt-hour is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ).

To calculate the the amount it takes to run the compressor daily, we use the formula below.

Formula:

Where:

Substitute these values into equation 1

Hence, the amount is 233.21 cents.

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A wave-shaped signal is represented graphically by a waveform. Depending on the kind of wave generating input, it might be either square or sinusoidal. The characteristics that determine the wave's size and shape determine the waveform.

The required details for waveform in given paragraph

The waveform in Figure 1 is a square wave with a period T. The DC component of this waveform is the average value of the waveform over one period. It can be found by integrating the waveform over one period and dividing by the period T:

DC component =  from 0 to T

The magnitude of the Fourier series harmonics can be found by using the formula for the Fourier series coefficients:

Ak = (from 0 to T)

Bk =  (from 0 to T)

where k is the harmonic number, f is the fundamental frequency (1/T), and A and B are the Fourier series coefficients.

For a square wave, the odd harmonics are non-zero and the even harmonics are zero. For the 3rd harmonic, the magnitude is:

Ak =  (from 0 to T)

=  (from 0 to T)

= (from 0 to T)

To set the magnitude of the Fourier series 3rd harmonic to zero,

D = 0

Finally, the RMS value of the waveform can be found by using the formula:

RMS =  (from 0 to T)

=  (from 0 to T)

= It's important to notice that the solution and expressions given here are only valid for square waveform with a period T and amplitude D.

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Question:1. What physical properties can cause an object to resonate?-mass, color, and density-shape, temperature, energy-shape, composition, and length-color, density, and composition

2. Which statement about resonance is correct?-Resonance causes the amplitude of vibrations to decrease.-Resonance causes the amplitude of vibrations to increase.-Resonance does not affect the amplitude of vibrations.-Resonance causes frequency to incease3.How can you make the natural frequency of a string increase?-decrease the tension of the string-cut the string-tighten the string-loosen the string4. A student wants to make the natural frequency of a tube increase. How can the student accomplish this?-Decrease the length of the tube-Change the composition of the tube-Make holes in the tube-Increase the length of the tube5.Which factor determines the natural frequency of an object?-color-elasticity-length-pressure

Explanation:

answer is 1,2,3,4,5,

The Archimedes principle states that when an object is submerged in a fluid, it seems to lose weight that is equal to the weight of the fluid that was displaced.

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(a) The number of electrons on the T-shirt is 700 electrons.

(b) The mass of the particle attached to your T-shirt is 1.5 x 10⁻²⁴ kg.

The number of electrons on the T-shirt is calculated as follows;

Let the number of electrons = e

Let the number of protons = p

p + e = 1596 ------ (1)

p = 1596 - e ------ (2)

qp - qe = -3.14 x 10⁻¹⁷ ------- (3 )

The equation (3) can be simplified as;

q ( p - e ) = -3.14 x 10⁻¹⁷ -------- (4)

Now substitute the value of p into (4)

q (1596 - e - e) = -3.14 x 10⁻¹⁷

q (1596 - 2e) = -3.14 x 10⁻¹⁷

1596 - 2e = ( -3.14 x 10⁻¹⁷ ) / ( q )

1596 - 2e = ( -3.14 x 10⁻¹⁷ ) / ( 1.6 x 10⁻¹⁹ )

1596 - 2e = 196.25

2e = 1596 - 196.25

2e = 1399.75

e = 1399.75 / 2

e = 700 electrons

The mass of the particle attached to your T-shirt is calculated as follows;

m = (700 x me ) + ( 896 x mp)

m = ( 700 x 9.1 x 10⁻³¹ ) + ( 896 x 1.67 x 10⁻²⁷ )

m = 1.5 x 10⁻²⁴ kg

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Pluto masses 1.3e22 kg, and its average distance from the sun is about 6e15 km. The sun’s mass is 2e30 kg. G is 6.7e−11 m^3 / kg⋅s^2.

What is meant by mass?

So the force of gravity is

f = G M1 M2 / d^2

= 6.7e-11 x 1.3e22 x 2e30 / 5e15^2

= .7e11 N = 70 billion newtons.

One might say, not insignificant.

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The directions of the centripetal force acting on the car and the velocity of the car is east. Thus, option d is correct.

Velocity is a measure of the rate and direction of an object's change in position. It is a vector quantity, having both magnitude and direction. Velocity is commonly described in terms of speed, distance traveled, and direction of travel. Velocity can be calculated by dividing the displacement (change in position) by the time taken for the displacement to take place. The SI unit for velocity is meters per second (m/s).

This force is generated by the car's acceleration inwards and is responsible for the car's circular motion. The velocity of the car is the speed of the car in the direction of the circle's circumference. The magnitude of the velocity is determined by the radius of the circle and the angular velocity of the car. The magnitude of the centripetal force is equal to the weight of the car times the square of the velocity divided by the radius of the circle.

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Complete question:

A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram When the car is in the position shown, its acceleration is directed toward the?

a. north

b. south

c. west

d. east