a crane lifts a 425 kg steel beam vertically a distance of 42 m. how much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s2? neglect frictional forces.

The distance between the 7th and the tenth second is 29.4 m.

We know that we can have to formulate the information that has been given here so as to obtain a proper progression and this would help us to get the common difference of the progression that we are looking at.

Now we know that the progression would look something like; 4.9, 14.7, 24.5 ....

We can see that this is an arithmetic progression that has a common difference of 9.8.

U7 = a + (n - 1)d

a = first term

n = Number of terms

d = common difference

U7 = 4.9 + (7 - 1) 9.8

= 63.7

U10 = 4.9 + (10 - 1) 9.8

U10 = 93.1

Between the 7th and 10th seconds, we have;

93.1 - 63.7

= 29.4 m

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The overall momentum of a closed system stays constant if no external forces are acting on it, according to the law of conservation of momentum. The relationship between mass and speed is known as momentum.

The overall momentum of a closed system stays constant if no external forces are acting on it, according to the law of conservation of momentum. The relationship between mass and speed is known as momentum.

According to mathematics, the following can be said of this law: The initial momentum, which existed before any interactions, and the final momentum, which followed those interactions, are equivalent in an isolated system. This indicates that, both before and after an event, the system's overall momentum, made up of all its objects, is unaffected.

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The velocity of an object is the rate of change of its displacement.

The velocity vector can be found by taking the derivative of the displacement vector. In this case, the displacement vector is given by r⃗ (t) = (at + bt³)i^ + (c - dt²)j^.

The derivative of the displacement vector is v⃗ (t) = (a + 3bt²)i^ + (-2dt)j^.

The displacement vector r⃗ (t) = (at + bt³)i^ + (c - dt²)j^ can be broken down into its x- and y-components as follows:

x-component: at + bt³

y-component: c - dt²

The velocity vector v⃗ (t) is the derivative of the displacement vector r⃗ (t). This means that the velocity vector is the rate of change of the displacement vector. In other words, it is how quickly the object is moving.

The velocity vector can be found by taking the derivative of each component of the displacement vector. The derivative of the x-component is a + 3bt². The derivative of the y-component is -2dt.

Therefore, the velocity vector v⃗ (t) = (a + 3bt²)i^ + (-2dt)j^.

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The controversial psychological study of prison life that took place in 1971 is known as the Stanford Prison Experiment. It was conducted by psychologist Philip Zimbardo and his team at Stanford University to examine how individuals adapt to the roles of prisoners and prison guards in a simulated prison environment.

The study involved 24 male college students who were randomly assigned to either the role of prisoner or guard. The experiment quickly spiraled out of control as the guards began to abuse their power, and the prisoners became increasingly submissive and depressed. The guards used psychological tactics such as humiliation, sleep deprivation, and even physical punishment to maintain their authority over the prisoners.

The study was meant to last for two weeks, but it was terminated after just six days due to the extreme and abusive behavior of the guards. The Stanford Prison Experiment remains controversial due to ethical concerns about the mistreatment of the participants and the potential long-term psychological effects on those who took part.

The study has had a significant impact on the field of psychology and has raised important questions about the ethics of conducting psychological research. It has also shed light on the dangers of group dynamics and how individuals can be easily influenced by social roles and situations.

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Answer:

it is a measure of the heat content of fuels or energy sources

Explanation:

Answer:

The loudness of sound is most closely related to

The pressure within a sound wave determines the loudness of the sound. In this lesson, learn how to calculate the sound pressure level of a sound wave and what this measurement represents.

Explanation:

Hospital personnel must wear special conducting shoes in operating rooms to prevent the buildup of static electricity, which could potentially ignite the highly flammable oxygen. Wearing shoes with rubber soles increases the risk of static discharge and should be avoided to ensure the safety of everyone in the operating room.

Hospital personnel must wear special conducting shoes while working around oxygen in an operating room because oxygen is highly flammable and can ignite easily. These special shoes are made of materials that conduct electricity, such as leather, to prevent the buildup of static electricity.

If personnel wore shoes with rubber soles, static electricity could accumulate on their bodies, particularly on their feet, due to the friction between the rubber soles and the floor. This static electricity could then discharge as a spark, potentially igniting the oxygen in the operating room.

By wearing conducting shoes, the static electricity is safely discharged to the ground, minimizing the risk of a spark that could cause a fire or explosion. The conducting materials in these shoes allow any static charges to flow freely and dissipate harmlessly. This precaution is crucial in an environment where oxygen is used, as even a small spark can lead to a catastrophic event.

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D)

Explanation:

Coz the position changes with time but the position change is not constant throughout time So, D) does not have constant velocity

Answer:

Q1) C, D

Q2) A

Q3) E

Q4) C

Q5) B

Q6) C

Explanation:

I think these are correct, hopefully it helps!

The force required to keep a hockey puck sliding at a constant velocity, neglecting ice friction and air resistance, is equal to its weight. Therefore, the correct answer choice is "equal to its weight."

When the puck is set in motion on the frozen pond, there are no external forces acting on it except for the force of gravity. According to Newton's second law of motion, the force required to keep an object moving at a constant velocity is equal to the product of its mass and acceleration.

In this case, the acceleration of the puck is zero because it is moving at a constant velocity. Since the only force acting on the puck is its weight, the force required to maintain its motion is equal to its weight. Therefore, the correct answer is "equal to its weight."

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Answer:

mass 3.67 kg, density 600 kg/m3) is fitted

with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with

0.900 of its volume submerged. Find the lead mass if the lead is fitted

to the block’s (a) top and (b) bottom.

The magnitude of the electric field at the midpoint between the two charged rings is zero.

The magnitude of the electric field at the midpoint between two charged rings can be calculated using the principle of superposition.

The electric field at the midpoint will be the sum of the electric fields produced by each ring individually. Since the charges on the rings are equal in magnitude and opposite in sign, the electric fields produced by each ring will have the same magnitude but point in opposite directions.

The electric field produced by a uniformly charged ring at a point on its axis can be calculated using the formula:

\(E = (k * Q * x) / (2 * π * ε * R^2 * (R^2 + x^2)^(3/2))\)

Where:

E is the electric field

k is Coulomb's constant\((8.99 x 10^9 N m^2/C^2)\)

Q is the charge on the ring

x is the distance from the center of the ring to the point on its axis

ε is the permittivity of free space \((8.85 x 10^-12 C^2/N m^2)\)

R is the radius of the ring

Since the rings have the same charge and are equidistant from the midpoint, the electric fields produced by each ring will cancel each other out, resulting in a net electric field of zero at the midpoint. Therefore, the magnitude of the electric field at the midpoint between the two charged rings is zero.

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Hank's distance to work is 17.5 kilometers long.He drove at an average speed of 70 km/h on Monday and arrived 11 minutes late.He drove at an average speed of 75 km/h on Tuesday and arrived 11 minutes early.

To find the distance of Hank's route, we can use the concept of average speed and time. Since the time taken to travel on both days is the same (11 minutes), the difference in arrival time can be attributed to the difference in speed. The speed difference is 5 km/h (75 km/h - 70 km/h). Considering that the time difference is 22 minutes (11 minutes late on Monday and 11 minutes early on Tuesday), we can use the formula: Speed = Distance / Time. Solving for the distance, we get 17.5 kilometers (5 km/h * 22 minutes / 60 minutes).

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Answer:

Explanation:

The kinetic energy of an object is given by the formula:

KE = 1/2 * m * v^2

where m is the mass of the object and v is its velocity.

Plugging in the given values, we get:

KE = 1/2 * 0.015 kg * (240 m/s)^2

= 1/2 * 0.015 kg * 57600 m^2/s^2

= 432 J

Therefore, the kinetic energy of the bullet is 432 Joules.

Answer:

The kinetic energy (KE) of an object is given by the formula:

KE = (1/2) * m * v^2

where m is the mass of the object and v is its velocity.

Substituting the given values, we get:

KE = (1/2) * 0.015 kg * (240 m/s)^2

Simplifying, we have:

KE = 0.5 * 0.015 kg * 57600 m^2/s^2

KE = 432 J

Therefore, the kinetic energy of the bullet is 432 Joules.

Explanation:

Answer:

there are just a bit over 1.6 km in a mile so 7.5*1.6=12. something so there is just a little bit more distance in 7.5 miles

Explanation:

Answer:

80/2= 40 m/s^2.

Explanation:

A jet starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s.  Its acceleration is 4 m/sec².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

acceleration = change in velocity / time

acceleration = 80 / 20

acceleration = 4 m/sec²

A jet starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s.  Its acceleration is 4 m/sec².

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Answer:

It should be option B polarization

Answer: The whole of it was owned originally by the lord of the manor. He lived in the big house called the manor house. Attached to it were many acres of grassland and woodlands called the park. These were the "demesne lands" which were for the personal use of the lord of the manor.

The lord of the manor previously owned the entire property. He resided in the substantial home known as the manor house.

Thus, The park, which covered many acres of grassland and trees, was connected to it. These "demesne lands" belonged to the lord of the manor and were used exclusively for his exclusive purposes.

The word "manor" is derived from the Old French word "manoir," which means "dwelling place," but a manor isn't just any old house.

The homes and grounds of the nobility were referred to as manors back when people still had titles of nobility. expressing to someone that his home is a manor is the equivalent of expressing that it is so lavish and beautiful that it could have belonged to a lord.

Thus, The lord of the manor previously owned the entire property. He resided in the substantial home known as the manor house.

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The magnitude of the speed at the center of a point simple harmonic motion (SHM) is 15.6691 m/s.

Simple harmonic motion (SHM) refers to a type of periodic motion where the restoring force is directly proportional to the displacement and is always directed towards the equilibrium position. The applicable equation of motion is

x=xmaxcos(ωt+ϕo).

Acceleration of a point in SHM = a = -ω2x

Distance of the point from the origin = x = 0.48 mm

Therefore, a = -ω2x = 4.26 m/s2-ω2x = a = -4.26 m/s2ω2 = 4.26/0.48 = 8.875

Therefore, ω = 2πf = √ω2 = 2π√8.875 = 29.665 rad/s

Period of oscillations = Tp = 2π/ω = 0.2122 sFrequency = f = 1/Tp = 4.7065 Hz

Amplitude of motion = xmax = 0.528 mmInitial phase = ϕo = 6π/π = 6 rad

Position of the point at t = 0s: x(t = 0s) = xmaxcos(ωt+ϕo) = 0.528cos(29.665 × 0 + 6) = -0.2284 mm

The time Δt required for a point in SHM to move from the center of motion to the amplitude of motion is of the period of motion. The distance of the point from the origin at the center of motion is given by: x = 0 mm, and the distance of the point from the origin at the amplitude of motion is given by: x = 0.528 mm.

From the applicable equation of motion: x = xmaxcos(ωt+ϕo), the time required to move from the center of motion to the amplitude of motion is given by:

cos(ωt+ϕo) = x/xmaxcos(ωt+ϕo) = cos^-1(x/xmax)ωt+ϕo = cos^-1(x/xmax)ωt = cos^-1(x/xmax) - ϕoωt = cos^-1(0.528/0.528) - 6ωt = -6

Therefore, the time required to move from the center of motion to the amplitude of motion is Δt = Tp/4 = 0.0531 s.At Δt/6 sec after passing the center point of the SHM: x = xmax/6 = 0.528/6 = 0.088 mm

The magnitude of the speed at the center of motion is given by: v = ωxmax = 29.665 × 0.528 = 15.6691 m/s

Therefore, the magnitude of the speed at the center is 15.6691 m/s.

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The velocity of the wave is defined by the product of wavelength and frequency. The velocity of a wave with a length of 10 m and frequency of 5hz will be 50 m/sec.

The velocity of the wave is defined by the product of wavelength and frequency. It is obtained from the formula of the wavelength which is given by;

\(\rm \lambda=\frac{v}{f} \\\\ \rm v = \lambda \times f \\\\ \rm v = 10 \times 5 \\\\ \rm v = 50\ m/sec\)

Hence the velocity of a wave with a length of 10 m and frequency of 5hz will be 50 m/sec.

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Answer:

False.

Explanation:

Mass is the amount of matter in a given object. Weight is the force acting on an object due to gravity.

Answer:

False

Explanation:

Weight is the act of pulling an object towards the earth surface so weight is a force to amount

Answer:

True

Explanation:

A Reference point is stationary

The given statement is true

Inertia is the tendency of an object to stay at rest or in motion

Answer:

The sun is located in the Milky Way Galaxy.

Answer: it’s c

Explanation:I put that as my answer for an assignment and got it right

The correct option is the speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Given that in the question there is a child who is doing experiment for an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table given in question we see that speed increases as cart goes down.

The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

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The wire connected to the DC source doesn't emit electromagnetic waves.

The electromagnetic wave is an oscillation of electric fields and magnets field that sustains each other, this wave time has the characteristics that it can travel without a material medium, for which they are of extreme importance.

It is caused by DC sources such as batteries only having a constant voltage, it is different from AC sources which have different voltage over time, AC voltage can induce the wire because AC sources have magnetic flux change. DC sources don't have magnetic flux change so they don't emit electromagnetic waves.

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Answer:

Camaflouge

Explanation:

When animals blend in with their surroundings to hide from predators.

Ex: A squirrel climbing a tree that is the same color of its fur.

An artic fox lying in the snow.

A bee getting pollen.

Stick bugs blending in with shrubs and trees.

When the large forces are 12 N and the small forces are 4n then the total net force is  16 newtons.

The net force is the resultant of all the forces; it is the result of adding all the forces together the greater the net force acting on the object, the greater its acceleration will be. Newton's second law of motion summarizes these relationships. The equation for net force can be written as

Net Force = F1 + F2 + F3…. + FN.

The net force is zero Newtons. All the separate forces balance with each other. Suppose you and your friends A and B are together pushing the cupboard from the same direction. Force applied by you is 5N, and your friend's A and B apply the force of 6N and 5N, respectively so the total force will be 11 newtons.

so we can conclude that When the large forces are 12 N and the small forces are 4n then the total net force is  16 newtons.

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