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The velocity of the load right after the brake of the lorry is suddenly applied at t = 6 s, is 16.9 m/s.

The velocity of the load is determined from the ratio of the load displacement and time taken.

Mathematically, the formula for displacement is given as;

Displacement = change in displacement / change in time

The displacement of the load at 6 seconds is calculated as;

D = area under the curve

D = (15 s - 6 s ) x (20 m/s - 0 m/s)  +  ¹/₂ (19 s - 15 s ) x (20 m/s - 0 m/s)

D = 180 m  + 40 m

D = 220 m

The velocity of the load;

v = ( 220 m ) / (19 s - 6 s )

v = 16.9 m/s

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Since the car is at rest, its starting speed is 0 m/s, its acceleration is 6.8 m/s2, and the distance the car must travel is 340 m. t =100s

An object's initial velocity is the rate at which gravity exerts its first force on it. However, the final mass and velocity quantity that gauges the speed and direction of a moving object after it has reached the maximum level acceleration.

The starting velocity of an automobile is zero while it is at rest. Its initial velocity would be greater than zero if a projectile is thrown into the area. The starting velocity will be greater than zero but will become zero if a car stops after pressing the brakes.

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Answer:

The hypothesis is the suggested explanation for a phenomenon while the theory is based on facts or tested explanation.

Explanation:

A hypothesis is a suggested explanation, an idea that is presented for argument so it can be tested to see if it is true. The hypothesis is made before any research has been done for it.

a theory is a proved or tested, unifying, well-substantiated, explanation for a set of verified, proven factors. It is a factual prediction, but a hypothesis is a reasoned explanation.

Thus, the hypothesis is the suggested explanation for a phenomenon while the theory is based on facts or tested explanation.

Given

The intensity is

To find

The relative intensity

Explanation

The relative intensity is given by

Here,

Thus,

Conclusion

The relative intensity is 96.6 dB

Answer:

force×distance

Explanation:

work is the ability of an object to move a distance as a result of the force being applied

The block gains 15 Joules of kinetic energy, to be precise.

Horizontal force of 5.0 newtons.

The sum of an object's force and its displacement is known as the work done.

Mathematically,

w = f * s

where,

completed work

F stands for force.

Displacement equals s

Kinetic energy is the energy that an item possesses just by virtue of its motion.

In the question, it is stated that a block has been subjected to 15 Joules of work; our task is to determine how much the block's kinetic energy has changed.

Having said that,

Work performed on the item equals a change in its kinetic energy.

This results in a 15 Joule increase in kinetic energy.

The block gains 15 Joules of kinetic energy, to be precise.

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Mass has no effect on how quickly an object moves when only gravity is at work while it is falling. Mass does not directly affect speed.

It determines how quickly an object can accelerate in reaction to a particular force. Less time is required for lighter objects to change their speed by a given amount with a given force.

An object's momentum will rise as its mass decreases since mass and momentum are closely connected. As an object's velocity rises, momentum will also increase. Since velocity is squared in the equation for kinetic energy, increases in velocity have exponential effects. When an object's mass and velocity are both doubled, the object's kinetic energy is quadrupled.

In physics, mass is a way to measure inertia, a fundamental property of all matter. The more mass a body has, the less of a change an applied force makes.

A particle's or object's mass, a dimensionless quantity, is used to represent how much matter is there (symbolized m). The kilogram is the chosen unit of mass according to the International System (SI) (kg).

The quantity of matter in a body is referred to as its mass. The SI unit of mass is the kilogram (kg). The mass of a body is constant at all times. The best approach to grasp mass is to consider how much matter each item or body consists of. There is mass in everything that we can see.

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A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol ρ, however Latin letter D may also be used.

If the density of an object is 9.331 x 10−2 lbs/cubic inch, what is its density in g/cm3?

9.331 x 10−2 lbs/cubic inch = 258 281 190,85 g/m³

To calculate the density:

The following is the density formula:

D = m/v, where D =  Density, m = mass, v = volume.

Write down the data and the density equation, solve for the mass, add the density to the volume, then multiply the result to get the density in grams.

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Answer:

The distance the car moves after all ten cannonballs have been fired is 1.5 meters  

Explanation:

The parameters given in the question are;

The length of the car = 20 meters

The mass of the of the cannon ball, m₁ = 2,000 kg

The direction the cannon fires = The right

The direction the car recoils = The left

The mass of each cannonball, m₂ = 15 kg

The number of cannonballs = 10

Let v₁ represent the speed of the car and let v₂ represent the speed of the cannonball, where momentum is conserved, we have;

m₁·v₁ = m₂·v₂

2000 × v₁ = 15 × v₂

400·v₁ = 3·v₂

Therefore, when the cannon ball travels 400 meters, the railroad car travels 3 meters

Similarly, when the cannon ball travels 400/20 = 20 meters, the distance the railroad car travels, d = 3/20 meters

We not that the railroad car and the car are brought to a stop each time the cannonball hits the watt

Therefore, the total distance moved by the car after all ten have been fired, \(d_{total}\), is given as follows;

\(d_{total}\) = d × The number of balls fired

∴ \(d_{total}\) = 3/20 meters per ball × 10 balls = 3/2 meters = 1.5 meters

The total distance moved by the car, \(d_{total}\) = How far the car moves after all ten have been fired = 1.5 meters.

To determine the charge, we can use the equation for the electric field due to a point charge:

E = k * q / r^2

Where E is the electric field, k is the Coulomb constant (8.98755 x 10^9 Nm^2/C^2), q is the charge, and r is the distance from the point charge.

We can rearrange this equation to solve for q:

q = E * r^2 / k

Plugging in the given values:

q = (68.3 N/C) * (28.8 m)^2 / (8.98755 x 10^9 Nm^2/C^2)

q = (68.3 N/C) * (826.24 m^2) / (8.98755 x 10^9 Nm^2/C^2)

q = (68.3 N/C) * (826.24 m^2/C^2)

q = (68.3 N/C) * (826.24 / 8.98755 x 10^9) C

q = (68.3 N/C) * (9.26 x 10^-9) C

q = 6.36 x 10^-7 C

The charge is approximately 6.36 x 10^-7 Coulombs.

The size of a 1 cm object placed 25 cm from the eye on the retina is approximately 0.039 cm or 0.4 mm.

Angular size is the angle subtended by an object at the eye's lens.

Object size (h) = 1 cm

Object distance (d) = 25 cm

Eye diameter (D) = 17 mm

To find the angular size, we can use the formula:

Angular size (\(\theta\)) = arctan(h / d)

First, let's convert the eye diameter from millimeters to centimeters:

\(D = 17 mm = 1.7 cm\)

Now we can calculate the angular size:

\(\theta = arctan(1 cm / 25 cm)\)

Using a scientific calculator or trigonometric table, we find:

\(\theta= 2.3 degrees\)

Next, we need to calculate the size on the retina using the formula:

Size on retina = \((\theta/360) * \pi* D\)

Substituting the values:

Size on retina =\((2.3/360) *\pi * 1.7 cm\)

Calculating:

Size on retina = 0.039 cm or 0.4 mm

Therefore, the size of a 1 cm object placed 25 cm from the eye on the retina is approximately 0.039 cm or 0.4 mm.

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The net power output for this heat engine will be 50 MW. The thermal efficiency for this heat engine will be 0.55 percent. The temperature of the furnace will be 15°c.

A heat engine is a device that generates power by rejecting some of the heat it receives from a source at high temperatures to a sink at low temperatures, such as the atmosphere. A Carnot engine is a reversible heat engine that operates between the two temperatures with optimal efficiency.

The heat engine's efficiency is always lower than the Carnot engine's. There are presented the heat transfer rates to and from a heat engine. Both the thermal efficiency and the net power output must be determined.

There is very little heat loss through the pipes and other parts.

This heat engine uses the river as the low temperature reservoir and the furnace as the high temperature reservoir. Keep in mind that the heat engine uses 37.5% of the heat it receives to produce work.

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Answer:

130.073 pounds

Explanation:

use a translation to find what kg to pounds is

Answer:

578.59235

Explanation:

59*9.8

9.8 is the force of gravity acting on the earth, therefore multiplying 59 and 9.8, you get 578.59N or, if you're rounding it up, 578.6N

Answer:

I need help with the same question

Explanation:

The negative sign indicates that the voltage of the point charge decreases as it moves in the direction of the electric field is - 240 V.

ΔV = - Ed

ΔV = - (8,000 N/C)(0.03 m) = - 240 V

Voltage, also known as electric potential difference, is a measure of the electric potential energy per unit of charge in an electrical circuit. It represents the force that drives the flow of electric charge from one point to another in a circuit.

In practical terms, voltage can be thought of as the pressure that pushes electric charge through a circuit. Just as water flows from a higher pressure area to a lower pressure area, electric charge flows from a higher voltage point to a lower voltage point. This flow of charge is what creates the electrical current that powers our devices and appliances. Voltage is measured in volts, which is the unit of electric potential. It can be measured using a voltmeter, which is a device that is connected in parallel to the circuit to measure the voltage across a specific component.

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The distance your vehicle travels from the time the eyes see a hazard to the time the brain knows it's a hazard is called perception distance.

Distance perception refers to a process in which a viewer perceives an interval between two points in space. Perception distance is the distance a vehicle travels from the moment you see a hazard until your brain recognizes it. For an alert driver, this is about 3/4 of a second. The velocity of your car affects the distance needed to stop it. The stopping distance is persistent by three factors: perception distance, reaction distance, and braking distance. Perception time is how long it endures to recognize a condition and comprehend that you require to stop.

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Answer:

An ax being used to hit wood (action) and the wood splitting after being hit

by the ax (reaction)

Explanation:

Answer:

d

Explanation:

Answer:

Power = 2 j/s

Explanation:

Power = Work / Time

= 20/10

= 2 j/s

α prєcípítαtíσn rєαctíσn rєfєrs tσ thє fσrmαtíσn σf αn ínsσluвlє sαlt whєn twσ sσlutíσns cσntαíníng sσluвlє sαlts αrє cσmвínєd. thє ínsσluвlє sαlt thαt fαlls σut σf sσlutíσn ís knσwn αs thє prєcípítαtє, hєncє thє rєαctíσn's nαmє. prєcípítαtíσn rєαctíσns cαn hєlp dєtєrmínє thє prєsєncє σf vαríσus íσns ín sσlutíσn.

A precipitation reaction is a chemical reaction in which two soluble salts (ionic compounds) in an aqueous solution (solution with water as the solvent) yield insoluble, solid salt, a precipitate, as one of the products. It is generally a double replacement reaction, in which there are two ionic compounds, and their ions switch (AB+CD yield AC+BD).

Example:

\(\mathbb{\green{Pb(NO_{3} )_{2} +2KI  ⇒2KNO_{3} +PbI_{2}}}\)

N.B. The (s) indicates a solid (or precipitate), whereas (aq) means that the compound is dissolved in an aqueous (water-containing) solution.

Answer:

1.67s

Explanation:

Given parameters:

Initial velocity  =  20m/s

Acceleration  = 6m/s²

Final velocity  = 30m/s

Unknown:

Time taken  = ?

Solution:

Acceleration is the rate of change of velocity with time. It is mathematically expressed as;

 Acceleration = \(\frac{v - u }{t}\)  

v is the final velocity

u is the initial velocity

 t is the time taken

            6  =\(\frac{30 - 20}{t}\)  

            6  = \(\frac{10}{t}\)  

              10  = 6t

              t  = 1.67s

C:The electron moves in a circle in the xy plane.

What is electron ?

Electron is a free and open-source framework created by GitHub that helps developers build cross-platform desktop applications with HTML, CSS, and JavaScript. Electron is based on Node.js and Chromium, making it a powerful tool for creating native applications with web technologies. Electron enables developers to build desktop applications that can run on Windows, Mac, and Linux, as well as Android and iOS devices.

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She is probably suffering from a major depression. Depression results in emotional change and loss of interest in previously appreciated activities.

Depression is a frequent and significant medical ailment that has an adverse effect on how you feel, think, and act. It can cause a number of mental and physical difficulties, as well as a loss in your ability.

According to epidemiological research, a hereditary element is involved in 30% to 40% of instances of bipolar illness. As a result, environmental influences have a larger role in the development of depression.

Maria's mother was deported 6 months ago, and she is staying with a cousin. She has to share a room with 3 other children and is very discouraged.

She has little energy to do much of anything, and she cries a lot, she is probably suffering from a major depression.]

Hence, option A is correct.

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Both the cars will have same potential energy.

At the top of the hill, both cars will have the same potential energy, regardless of the route they took to get there. Potential energy depends on an object's position in a gravitational field, which is determined by the height of the object relative to a reference point. In this case, both cars started at the bottom of the hill and ended up at the top, which means they both gained potential energy as they moved upwards against gravity. The amount of potential energy gained depends only on the starting and ending heights and not on the route taken, so both cars will have the same potential energy at the top of the hill.

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GABA appears to moderate levels of general arousal and anger, hostility, and violence. An inhibitory neurotransmitter is serotonin. Serotonin plays a role in the regulation of pain, anxiety, appetite, sexuality, and mood.

It has a region known as periaqueductal grey matter (PAG), which connects the prefrontal cortex with the amygdala and hypothalamus. It helps to coordinate and integrate behavioral responses to stressors that are believed to be internal or external, including pain or threat. In particular, impulsive aggression has been linked to low levels of the neurotransmitter serotonin (5-HT) in both humans and animals. An inhibitory neurotransmitter is GABA. It reduces a nerve cell's capacity to produce, receive, or communicate chemical signals with other nerve cells. Changing levels of GABA are connected to a wide range of medical disorders.

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From other spectroscopic techniques and the compound's overall structure is often required to make a definitive identification of functional groups.

The absorption at 2250 cm^(-1) in the infrared (IR) spectrum typically indicates the presence of a functional group called a "C≡C" triple bond or a "C≡N" triple bond.

The stretching vibrations of the carbon-carbon triple bond (C≡C) or carbon-nitrogen triple bond (C≡N) occur in this region of the IR spectrum, resulting in the observed absorption at 2250 cm^(-1).

It's important to note that the interpretation of IR spectra is based on general trends and characteristic absorptions. Additional information from other spectroscopic techniques and the compound's overall structure is often required to make a definitive identification of functional groups.

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Astronomers explain the presence of jovian-size planets that orbit very close to their stars through the theory of planetary migration.

According to this theory, the planets likely formed farther out from their host stars and then migrated inward over time.This migration process can occur due to various mechanisms, such as gravitational interactions with other planets, interactions with the protoplanetary disk, or tidal forces. As the planets migrate inward, they may end up in close proximity to their host stars, even if they initially formed farther away.This explanation is supported by observational evidence, including the detection of hot Jupiters—gas giant planets with short orbital periods—around other stars. The migration theory provides a plausible explanation for why these massive planets can be found so close to their stars.Therefore, the correct answer from the given choices would be: The planets likely formed farther out, then migrated inward.

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We must use the mechanical advantage formula to determine the length of the ramp:

Output force minus Input force equals Mechanical Advantage (MA). In this instance, the input force is the force required to hoist the object in the absence of the ramp, and the output force is the weight of the object being raised up the ramp

By dividing the length of the slope by its height, you may calculate the optimal mechanical advantage of an inclined plane. The ideal mechanical advantage of a ramp, for instance, is 3 metres 1 metre, or 3 metres, if you are loading a truck that is 1 metre high utilising it.

Basic Machines' Mechanical Advantage and Efficiency Calculated. The IMA is typically calculated as the resistance force (Fr) divided by the effort force (Fe). IMA is also equal to the product of the load's travel distance (d) and the distance over which the effort is applied (de).

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