How much work is done on a small car if a 1000 N force is exerted to move it 75

Answer:

D.

Explanation:

DId the test

The gravitational force acting on the body of mass 53 Kg on earth will be 530 Newtons.

Weight is the force exerted by earth on a body on the surface of earth. Mathematically -

W = mg

Given is a 53 kg object standing on the surface of the Earth.

The gravitational force acting on the body will be same as it weight and will be directed towards the center of earth. Using the formula for weight -

W = mg = 53 x 10 = 530 N                [taken g = 10 m/s²]

Therefore, the gravitational force acting on the body of mass 53 Kg on earth will be 530 Newtons.

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a. upward. The rider is upside down at the top of the loop, and the seatbelt provides a centripetal force that pulls the rider upward toward the center of the circle, allowing them to follow a circular path.

Centripetal force is a type of force that acts on an object moving in a circular path. It is directed towards the center of the circle and is necessary to keep the thing moving in a circular direction. The centripetal force can be provided by a variety of sources, such as tension in a rope, gravity, or a magnetic field. The magnitude of the centripetal force required depends on the mass of the object, the speed of the thing, and the radius of the circle.

The formula for centripetal force is

F = mv²/r,

where F is the force, m is the mass of the object, v is the velocity of the object, and r is the radius of the circle. Centripetal force is an essential concept in many areas of physics, including mechanics, astrophysics, and engineering, and it plays a significant role in the functioning of many natural and man-made systems, such as planetary orbits, and centrifuges.

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Answer:

Good for you!

Answer:

С. 10.41 Ampere

Explanation:

Given that,

Power, P = 125 watts

Voltage, V = 12 volts

We need to find current. Power in terms of current and voltage is given by :

P = VI, I = current

\(I=\dfrac{P}{V}\\\\I=\dfrac{125\ W}{12\ V}\\\\I=10.41\ A\)

So, the current is 10.41 A.

The refractive index of the mystery substance is n2 = 2.17.

Refractive index is a physical quantity that describes how light interacts with a particular material. It is defined as the ratio of the speed of light in a vacuum to the speed of light in the material. Refractive index is an important factor in optics, as it determines how much light is bent or refracted when it enters a material, and the angle at which it is refracted. Refractive index is also used to measure the thickness of a material or to calculate the index of refraction of a material. It is also used to determine the refractive properties of gemstones, for example in gemology.

The refractive index of the mystery substance (n2) can be calculated using Snell's law, which states that n1*sin(01) = n2*sin(02).
Therefore, n2 = n1*sin(01)/sin(02) = 1.33*sin(43°)/sin(22°) = 2.17
This means that the refractive index of the mystery substance is n2 = 2.17.

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because i said so

the answer is 80 diveded by 8 equalzzzz

The time it takes for the student to reach the bottom of the hill is 4 seconds.

Given:
Initial velocity (u) = 2.0 m/s (pushes off from the top of the hill)
Acceleration (a) = 0.5 m/s² (constant while going down the hill)

To find the time it takes for the student to reach the bottom of the hill, we can use the following equation:

v = u + at

Where:
v = final velocity
u = initial velocity
a = acceleration
t = time

Since the final velocity is not given, we need to find it first. When the student reaches the bottom of the hill, the final velocity (v) will be zero, as they come to a stop.

0 = 2.0 m/s + 0.5 m/s² * t

Now, we can solve for time (t):

-2.0 m/s = 0.5 m/s² * t

To isolate t, we divide both sides of the equation by 0.5 m/s²:

t = -2.0 m/s / 0.5 m/s²

t = -4 seconds

Since time cannot be negative in this context, we disregard the negative sign. Therefore, the time it takes for the student to reach the bottom of the hill is 4 seconds.

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A gamma ray photon has a higher frequency than a radio photon. Therefore, the gamma ray photon has a shorter wavelength, higher energy, and same speed.

This is because the energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength. Since the gamma ray photon has a higher frequency than a radio photon, it also has higher energy. And since the energy of a photon is inversely proportional to its wavelength, the gamma ray photon must have a shorter wavelength than a radio photon. The speed of light is constant in a vacuum, so both photons travel at the same speed.

Therefore, the correct answer is "a shorter wavelength, higher energy, and same speed."

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The magnetic flux passing through defined by 0.02 < r < 0.03 m and 0 < z < 3 is `8π × 10⁻⁷ Wb`

Permeability of free space is given by `μ0 = 4π × 10⁻⁷ T m A⁻¹`

Formula used to calculate the magnetic flux passing through the defined area is as follows:

`ΦB = μ0 * I * (Θ2 - Θ1) / 4π`

Where

I = current

Θ1 = lower limit of angle

Θ2 = upper limit of angle

For the given problem, current filament is along the z – axis in the direction, thus the angle Θ1 and Θ2 will be 0 and 2π respectively.

The distance between 0.02 m and 0.03 m is 0.01 m, the mean radius of the area will be`(0.03 + 0.02) / 2 = 0.025 m`

The formula for calculating the magnetic flux through the defined area is`ΦB = μ0 * I * (Θ2 - Θ1) / 4π`

From the question, we know that;:

μ0 = `4π × 10⁻⁷ T m A⁻¹`

I = 4A

Θ1 = 0

Θ2 = 2π

The formula becomes`ΦB = (4π × 10⁻⁷) * 4 * (2π - 0) / 4π``ΦB = 8π × 10⁻⁷ Wb`

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1. The observed X-rays in the context of black holes do not originate from inside the black hole itself. Instead, they are generated from the immediate vicinity of the black hole where intense gravitational forces and extreme physical conditions occur.

2. The effect of interstellar dust on the observed brightness of distant objects confused. scientists for several decades, causing them to overestimate distances. Some of the commonly used distance indicators are:

Some common sources of error are:

A black hole is an area of space where gravity is so intense that nothing can escape it, not even light. When a big star experiences gravitational collapse, a very dense and compact object is created. When a star runs out of nuclear fuel, it collapses due to gravity since it is no longer able to withstand the pull of gravity.

An accretion disc grows around a black hole as matter enters it. The gravitational energy released as matter spirals towards the black hole causes the spinning disc of gas, dust, and other star material that makes up the accretion disc to become incredibly bright and luminous. The matter in the accretion disc collides, heats up, and emits high-energy radiation, including X-rays, as a result of the black hole's strong gravitational pull.

Therefore, the observed X-rays in the context of black holes do not originate from inside the black hole itself. Instead, they are generated from the immediate vicinity of the black hole where intense gravitational forces and extreme physical conditions occur.

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At 12,000 feet above sea level, the temperature is 38°F if the air temperatures at sea level is 80°F.

Daniel Gabriel Fahrenheit, a scientist, initially suggested the temperature measure known as the Fahrenheit scale in 1724. (1686–1736).

The sign for the unit is indeed the letter °F, which stands for degrees Fahrenheit. There are several stories about how he first developed his scale, but according to the first publication, the lower defining point, 0 °F, was chosen as the freezing point of a brine solution that was formed by mixing water, snow, and ammonium chloride (a salt).

His best guess for the normal temperature of a person, which was initially put at 90 °F and later adjusted to 96 °F (around 2.6 °F),The other limit established was lower than the actual value (due to a subsequent revision of the scale).

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If the net force on an object is zero, it will slide down an inclined plane at a constant velocity. This knowledge can be used to calculate the coefficient of kinetic friction between two objects.

The kinetic friction on a slope is denoted as f k = k m g cos. The change in velocity (v) over the change in time (t) is expressed by the equation a = v/t. This enables you to calculate how quickly velocity varies in meters per second squared (m/s2). The coefficient of friction (fr) is a quantity that represents the ratio of the frictional resistive force (Fr) divided by the normal or perpendicular force (N) pushing the objects together.

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Answer:

True

Explanation:

The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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Here's the formula you want to use to solve this:

Distance = (1/2) · (acceleration) · (time²)

We know the distance to the ground and the acceleration of gravity, so let's pluggum in:

. . . . . 125 m = (1/2) (9.8 m/s²) (time²)

Divide each side by (4.9 m/s²):  

. . . . . (125 m) / (4.9 m/s²) = time²

. . . . . 25.51 s² = time²

Square-root each side:

5.05 seconds  = time

Answer:

sexual reproduction

Explanation:

This is a defective question. It was WRITTEN by someone who is unclear on the concepts.  DON'T try and answer it.

It's trying to get us to use Newton's second law ... F = m • a.

But that only tells us how much force must act ON THE CAR in order to accelerate it. (45 kg) • (4 m/s^2) = 180 newtons.

This is NOT the force exerted BY the car when it hits something. THAT force depends on its speed WHEN it hits, AND how long it takes for the wreckage to actually come to rest, AND how hard or soft the wall is.

DON'T try to answer this question. Your answer will be wrong, you won't understand why, and the teacher you try to argue with probably won't either.

============================================

More explanation:

Think about jumping off of a ladder in your back yard.  Several times.

Your mass is the same every time.  Your acceleration is the same every time . . . 9.8 m/s² down, the acceleration of Earth gravity, every time.

BUT ...

-- I'll bet you would rather land on wood than on concrete. The force of landing would be less.

-- I'll bet you would rather land on dirt than on wood. The force of landing would be less.

-- I'll bet you would rather land on grass than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a pile of blankets than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a trampoline than on a pile of blankets. The force of landing would be less.

-- I'll bet you would rather jump from a short ladder than from a tall one.  Your speed would be less when you landed, and the force of landing would be less.

==> Your mass is the SAME every time, and your acceleration is the SAME every time.  But the force when you hit is DIFFERENT every time.

The mass and acceleration of the car DON'T tell us the force of the hit when the car hits a wall.  

The power of this lens is 0.009724 diopters. To calculate the power of this lens in diopters, we need to use the formula: P = (n - 1) * (1 / R1 - 1 / R2)

Where P is the power of the lens in diopters, n is the index of refraction of the glass (1.52 in this case), R1 is the radius of curvature of one surface of the lens, and R2 is the radius of curvature of the other surface of the lens.

Plugging in the given values, we get:

P = (1.52 - 1) * (1 / 19.3 - 1 / 30.1)

P = 0.52 * (0.0519 - 0.0332)

P = 0.52 * 0.0187

P = 0.009724

Therefore, the power of this lens is 0.009724 diopters.

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The shrinking of integrated circuit device dimensions over six decades led to faster computing, advanced circuit functions, improved power efficiency, and widespread advanced electronic devices.

Increased Computing Speed: As device dimensions have shrunk, the distance between transistors on a chip has decreased, enabling faster electrical signal propagation. This has led to increased clock speeds and faster processing capabilities, allowing for more complex computations and faster data processing.

Enhanced Circuit Functionality: With smaller device dimensions, more transistors can be integrated into a single chip. This has enabled the development of highly sophisticated and complex circuits, such as microprocessors, capable of performing intricate tasks.

The increased number of transistors has also facilitated the integration of various functionalities, such as memory, graphics processing, and communication capabilities, onto a single chip, leading to more versatile and powerful computing devices.

Improved Power Efficiency: Smaller device dimensions have reduced the distance that electrical signals need to travel within a chip. This has minimized the power losses associated with signal propagation, resulting in improved power efficiency. Additionally, the miniaturization of components has allowed for the development of low-power transistors, enabling energy-efficient operation and longer battery life in portable electronic devices.

Proliferation of Advanced Electronic Devices: The million-fold reduction in device dimensions has made it possible to produce smaller, lighter, and more compact electronic devices. This has led to the widespread adoption of smartphones, tablets, wearables, and other portable devices that offer advanced computing, communication, and multimedia capabilities. The miniaturization of integrated circuits has also enabled the development of Internet of Things (IoT) devices, smart sensors, and embedded systems, which have revolutionized various industries and aspects of everyday life.

Increased Integration and System Complexity: Shrinking device dimensions have allowed for greater integration of components and systems on a single chip. This has led to the development of system-on-chip (SoC) solutions, where multiple functions, such as processing, memory, and communication, are combined on a single integrated circuit. The increased integration and system complexity have contributed to the advancement of technologies like artificial intelligence, machine learning, and autonomous systems.

Cost Reduction: The continual shrinking of device dimensions has resulted in increased transistor density on a chip. This has led to higher production yields per wafer, driving down the manufacturing cost per transistor. The cost reduction has made advanced computing and communication technologies more affordable and accessible to a wider range of users, fostering their widespread adoption.

Overall, the million times shrinking of device dimensions in integrated circuits over the past six decades has had a profound impact on computing and communications, revolutionizing the speed, functionality, power efficiency, and size of electronic devices while enabling the development of new technologies and driving economic growth in the digital era.

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The statement "In testing hypotheses, the researcher initially assumes that the alternative hypothesis is true and uses the sample data to reject it" is a FALSE statement.

In testing hypotheses, the researcher initially assumes that the null hypothesis is true and uses the sample data to reject or fail to reject it. The null hypothesis is the statement that there is no relationship or difference between the variables being tested. The alternative hypothesis is the statement that there is a relationship or difference between the variables.

The researcher's goal is to gather evidence to either support or reject the null hypothesis.

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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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Answer:

A

Explanation:

Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. ... Small particles drew together, bound by the force of gravity, into larger particles.

The Sun consists primarily of gases least supports the theory that gravity helped form our solar system.

The Solar System can be defined as the gravitationally bound system of the Sun and the objects that orbit it. Our solar system is formed 4.6 billion years ago from the gravitational collapse of a giant molecular cloud. The vast majority of the mass is in the Sun, with most of the rest mass contained in the planet Jupiter.

The four giant planets of the solar system are substantially larger and extremely massive than the terrestrials planets. Jupiter and Saturn, are gas giants, being made of mainly of hydrogen and helium.

The initial molecular cloud was several light-years across and probably birthed several stars. It consisted mostly of hydrogen, with some helium, and little amounts of heavier elements fused by generations of stars.

This region would become the Solar System, called as the pre-solar nebula collapsed, conservation of angular momentum caused it to rotate.

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If we consider glass as a liquid, it is most unlike other common liquids in terms of its viscosity.

The term "viscosity" describes a liquid's internal friction or resistance to flow. Common liquids like water, oil, or alcohol exhibit varying levels of viscosity, with some flowing more easily than others.

However, glass, despite being considered a supercooled liquid, has a significantly higher viscosity compared to other common liquids.

Glass is an amorphous solid that undergoes a gradual transition from a rigid state to a more fluid-like state with increasing temperature. However, this transition occurs over an extremely long time scale, making the flow of glass practically imperceptible under normal conditions. It has an extremely high viscosity so it acts more like a solid and resists flow, unlike typical liquids.

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Answer:

11000 J

Explanation:

Apply the formula: K = 1/2.m.v²

K = 1/2.55.20²

K = 1/2.55.400

K = 55.200

K = 11000 Joules

An blue foam sphere and a red foamy ball are placed four meters apart. The red ball is attracted to the blue ball with such a force = 626 -.00330 C because the red ball does have a charges of 0.000337 C.

In science, "force" is defined in a precise manner. The terms "push" or "pull" are perfectly suitable for describing a force of the this magnitude. No force exists "in" or "inside" a thing. A force from one thing can exert pressure on it. A force is a force, regardless of whether anything is alive or not.

When an object having mass is pushed or pulled, it changes its velocity, according to the definition of force in physics. Force is indeed an external agent that has the power to alter a body's resting or moving condition. It has a size and a movement.

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a. Just Noticeable Difference (JND) refers to the smallest difference in stimuli that can be detected by a person. It is also known as the difference threshold. Weber's Law states that the JND is proportional to the magnitude of the stimulus.

In simpler terms, the JND is relative to the initial stimulus. For example, if you have a 10 kg weight and you add 1 kg, you will notice the difference. However, if you have a 100 kg weight and you add 1 kg, you may not notice the difference. Weber's Law helps us understand how our perception changes as the magnitude of the stimulus changes.

b. To suggest a discount using the principle of JND, we need to consider the income range and the prices of the pressure cooker. Let's assume the JND for families earning Rs. 10,000 per month is Rs. 200 and for families earning Rs. 15,000 per month is Rs. 300. Based on these values, we can calculate the discounts that would make them notice and be motivated to buy the pressure cooker.

For families earning Rs. 10,000 per month, the JND is Rs. 200. So, if we offer a discount of Rs. 200 on the 3 Litre pressure cooker priced at Rs. 1800, the new price would be Rs. 1600. This discount would be noticeable to them and may motivate them to purchase.

For families earning Rs. 15,000 per month, the JND is Rs. 300. So, if we offer a discount of Rs. 300 on the 5 Litre pressure cooker priced at Rs. 2400, the new price would be Rs. 2100. This discount would be noticeable to them and may encourage them to buy.

The justification for these discounts is that they are based on the JND principle, which ensures that the discounts are noticeable to the target audience. By offering discounts within their perception range, we can attract their attention and motivate them to make a purchase.

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