Ironman in his suit has a mass of 180 kg. How much gravitational potential
energy does he have if he is hovering 400 m in the air? Record your answer
to the correct number of significant digits. *

A. 2.22 J

B. 7.20 x 104 J

C. 07.06 x 105 J

D. 722 J

Answer:

The decay process started with 100 radioactive atoms.Eventually all 100 atoms will decay to a stable form. The graph approaches 100 because that is the maximum number of stable atoms that can form

Explanation:

Edge

The graph approach the horizontal line y = 100. Because the maximum number of the stable atoms is equal to 100.

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.

From the graph, it is observed that the as the stable atom is increasing, the half life is increasing. But at a point of time the at the value of the half life equal to 6 the no of stable atoms reached to 100.

The graph approach the horizontal line y = 100. Because the maximum number of the stable atoms is equal to 100.

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Final answer:

The speed of a swing's circular motion in an amusement ride can be decreased by increasing air resistance, reducing the propelling force, altering the angle of the swing's support, or increasing the swing's mass without an increase in force.

Explanation:

The speed of a swing's circular motion in an amusement park ride can be decreased through various means. One way that the speed of the swing's circular motion can be reduced is by increasing the air resistance acting against the swing. This can be done, for example, if the swings have a wider surface area or if flaps are added that catch more wind. In addition, reducing the force that propels the swing can also decrease speed. On most rides, this would involve slowing down the motor or mechanism that is causing the ride to spin. This reduction in propelling force would result in a decreased centripetal force on the swings, thus reducing their speed.

Another factor that could decrease the speed of the swing's circular motion is the angle of the supporting chains or rods. If they are designed to hang more vertically rather than being allowed to tilt outwards, the centripetal acceleration required to keep the ride moving in a circle would decrease, resulting in a slower rotation speed of the swings. Lastly, an increase in the mass of the swings without an increase in the propelling force would also result in slower speeds due to the greater inertia that needs to be overcome to maintain the circular motion.

Answer:

yes

Explanation:

Answer:

with what

Explanation:

Answer:

Explanation:

Force = mass * acceleration.

Answer:

277983.465 N

Explanation:

[tex]\rho[/tex] = Density of seawater = [tex]1030\ kg/m^3[/tex]

g = Acceleration due to gravity = 9.81 m/s²

h = Depth = 29 m

w = Force = 390 N

A = Area = [tex]0.95\ m^2[/tex]

Force in the system would be

[tex]F=(\rho gh)A-w\\\Rightarrow F=(1030\times 9.81\times 29)\times 0.95-390\\\Rightarrow F=277983.465\ N[/tex]

The downward force must they exert on the hatch to open it is 277983.465 N

The question is incomplete, the complete question is;

Shah did not trust the results of an experiment that she had read about, so she is conducting the experiment herself. She goes through the same set of steps and measures the effect of the amount of sugar on a single organism.

Which best describes what Shah is doing?

replication

repetition

both repetition and replication

neither repetition nor replication

Answer:

replication

Explanation:

Replication in scientific experiments refer to the process of going through all the steps in an experiment in order to obtain the same set of results initially obtained.

All scientific experiments is expected to be replicated under identical experimental conditions. If the results obtained by a scientific investigation cannot be replicated under identical circumstances by other scientists, then the scientific data must be taken with a pinch of salt.

Shah is expected to obtain almost exactly the same data as the original researchers who first published the data.

Answer:

The correct answer is replication

Explanation:

Answer:

3 m/s^2

Explanation:

acceleration= Change in velocity/time

= 30-0 / 10

= 30/10

=3 m/s^2

Answer:

4

Explanation:

Mechanical Advantage is given as a ratio of the force a machines gives out to the force that it receives.

Simply put, it is the ratio of output force to input force:

[tex]MA = \frac{OF}{IF}[/tex]

We are given that:

OF = 60 N

IF = 15 N

Hence, the Mechanical Advantage of the lever is:

[tex]MA = \frac{60}{15} \\\\\\MA = 4[/tex]

It is a ratio so it has no unit.

Answer:

Explanation:

Given that, .

Input effort is 15N

Fi = 15N

Output effort is 60N

Fo = 60N

Then,

Mechanical advantage(M•A) is the ratio of two forces, and it is also referred to has force ratio.

M•A = Output Force / Input Force

M•A = Fo / Fi

M•A = 60 / 15

M•A = 4

The mechanical advantage is 4

Answer:

The options are

A) adding heat to the system

B) having the system do work on the surroundings

C) withdrawing heat from the system

D) adding heat to the system and having the system do work on the surroundings

E) a volume compression

The answer is

A) adding heat to the system

Explanation:

It is important to note that increase in temperature will result in the collision of more particles thereby resulting in a corresponding increase in the internal energy of the system.

The relationship between temperature and internal energy is a direct one. As temperature increases, internal energy also increases and vice versa.

Answer:

Doing thermodynamic work on the system

Explanation:

The internal energy of a system can be increased by introduction of matter, by heat, or by doing thermodynamic work on the system. ... If the containing walls pass neither matter nor energy, the system is said to be isolated and its internal energy cannot change.

Internal energy is NOT all the energy in the system, it is the kinetic and potential energy associated with the random motion of the molecules of an object. If you heat an object, you will increase its internal energy. As the object cools, its internal energy will decrease.

The internal energy can be changed by changing the temperature or volume of the object without changing the amount of particles in the object. Temperature: If the temperature of a system rises, the molecules will travel quicker, therefore have more kinetic energy and so the Internal Energy will increase.

Answer:

The answer is V =delta U over q

Explanation:

Electric potential is defined as the magnitude of the electric field through the potential energy that a charge would have if placed at that point. Mathematically, the potential is defined with the following expression:

[tex]V=\frac{E_{p} }{q}[/tex]

where:

V is the electric potential. Its unit is Julius by Coulomb (J/C).

Ep is the electric potential energy that has a charge

q is the charge

In the question Ep = ΔU

Answer:

The answer is V=kq/d

Explanation:

The electrostatic potential is defined in terms of work done in taking a unit positive charge from infinity to the point in question.

V=kq/d

Where d= distance from infinity to the point in question

k= constant of proportionality

q= attracting charge

The electric potential is measured in volts

Answer:

Velocity, height

Explanation:

Answer: it should be velocity and height (the third answer)

Answer:

Explanation:

Answer:

approx 2.23 seconds

Explanation:

150/67

s=d/t and t=d/s

Answer:

180 watt

Explanation:

P = V x I

= 1.5 x 120

= 180 Watt

Radioactive substances have a half-life.

Radioactive substances are characterized by their unstable atomic nuclei. These nuclei undergo a process called radioactive decay over time, transforming into more stable nuclei by emitting particles and energy. This process occurs randomly at the level of individual atoms, making it impossible to predict exactly when a particular atom will decay.

The concept of a "half-life" is crucial in understanding the behavior of radioactive substances. The half-life is the time it takes for half of the radioactive nuclei in a sample to decay. It's a fundamental property of each radioactive isotope and varies widely from one isotope to another. Some isotopes have very short half-lives, measured in fractions of a second, while others have half-lives measured in millions of years.

The half-life allows scientists to quantitatively describe the rate of radioactive decay. It provides a useful tool for various applications, including dating geological samples (e.g., carbon-14 dating for archaeological purposes), understanding the behavior of radioactive materials in nuclear reactors, and determining the safety and handling of radioactive substances in medical and industrial settings.

In summary, radioactive substances are characterized by their propensity to undergo radioactive decay, and the concept of half-life is a fundamental aspect of their behavior. It quantifies the rate of decay and is essential for a wide range of scientific and practical applications.

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The half-life of a radioactive substance is the time it takes for half of it to decay. The remaining amount of substance can be calculated by dividing the initial amount by two for each half-life that elapses.

Define Half-Life

The half-life of a radioactive substance is the length of time required for half of the radioactive nuclei in a sample to undergo decay. This is a characteristic property of each radioactive isotope. After one half-life, the amount of the original substance is reduced by half. Thus, after an integer number (n) of half-lives, the amount remaining can be found by dividing the initial amount by 2n.

Determine the Amount of Radioactive Substance Remaining

For example, if you start with 5 grams of a radioactive isotope and one half-life passes, you would have 2.5 grams remaining. If another half-life passes, you divide that amount by two again, leaving you with 1.25 grams, and so on for each subsequent half-life.

Considering the example provided in the prompt, if substance A has a half-life of 4.2 days and your initial amount is 5 grams, after one half-life (4.2 days), you would have 2.5 grams remaining. Similarly, substance B with a half-life of 310 days would still be 5 grams after the same period, as the number of elapsed half-lives would be much less than one.

The first part of the question is missing and it says;

Electrons are made to flow through the copper strip of as shown in the attached image . The strip's cross section is 1.00 mm high and 30.5 mm wide, and the strip is placed in a magnetic field B = 4.00T

Answer:

Hall potential difference = 5.6 x 10^(-6) V

Explanation:

We are given that;

Thickness of copper strip; L = 1mm = 1 x 10^(-3)m

Width of copper strip; W = 30.5mm

Magnetic field; B = 4T

Current in the strip = 19A

Number density; n = 8.46 × 10²⁸ m⁻³

Formula for number density of charge is given by;

n = (B•I)/(V•L•e)

Where;

B is uniform Magnetic field

I is current

V is potential difference

L is thickness of strip

e is electron charge = 1.6 x 10^(-19)C

Thus, let's make V the subject;

V = (B•I)/(n•L•e)

V = (4 x 19)/(8.46 × 10²⁸•1 x 10^(-3)•1.6 x 10^(-19))

V = 76/(13.536 x 10^(6)) = 5.6 x 10^(-6) V

Answer:

OPTION A, Kelvin Thermometer is Incorrect

Explanation:

Now, if you consider best two out of three results, then celsius and Fahrenheit thermometers read the same value, meaning both are right.

1) K = °C + 273

K = 100°C + 273

k = 373°C

Kelvin Thermometer is Incorrect

2) [tex]C = \frac{F - 32}{1.8}[/tex]

when we have 212°F

[tex]C = \frac{212 - 32}{1.8} \\\\= 100^\circ C[/tex]

which is correct

Answer:ll. Kinetic energy can be transformed into Potential energy.

And, lll. Potential energy can be transformed into Kinetic energy

Final answer:

Statements II and III are true as they describe the mutual transformation between kinetic and potential energy. Kinetic energy can be converted to potential energy and vice versa, which is a fundamental concept in physics describing energy dynamics.

Explanation:

When discussing energy, it's important to distinguish between kinetic energy and potential energy. Kinetic energy is the energy of motion, exemplified by a rolling ball or flowing water. Potential energy, on the other hand, is the energy stored due to an object's position, such as a book on a shelf or water behind a dam.

Contrary to statement I, kinetic energy can indeed be transformed into other types of energy. An easy-to-understand example is a pendulum. As it swings, its kinetic energy at the lowest point is transformed into potential energy as it rises. When it stops at the highest point, all the kinetic energy has been converted into potential energy. This validates statement II that kinetic energy can be transformed into potential energy.

Similarly, statement III is true: potential energy can be transformed into kinetic energy. This is seen when the pendulum begins its swing downward, with the potential energy converting back into kinetic energy due to gravity's pull.

Finally, statement IV is false because potential energy can be transformed into other types of energy. The potential energy of water behind a dam can be transformed into kinetic energy as the water falls and then into electrical energy through a generator.

Therefore, statements II and III accurately describe the transformation of energy, illustrating that energy is not static and can be converted from one form to another, including potential and kinetic energy.

Answer:

140°

Explanation:

The law of reflection states that the angle of redlection equals to the angle of incidence.

When light rays hit surface at 20°, they also leave the surface at the same angle

Since the whole surface has 180° then subtracting these two angles from total angle gives the the angle between the incident and reflected rays.

180°-20°-20°=140°

The angle of incidence and reflection are equal hence 140/2=70°

The question needed the angle between the incident and reflected rays which is already calculated as 140°

The energy that reaches the Earth's equator is redistributed through air currents and ocean currents.

Atmospheric circulation is a term used in geography to refer to the movement of air on a large scale that serves as the distribution of solar heat on the surface of the Earth.

As a result of the latitudinal circulation, the solar radiation (that affects the low equatorial latitudes) uses air currents, differences in atmospheric pressure and water currents to distribute itself throughout the Earth's atmosphere.

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Solar radiation at the Earth's equator is converted into thermal radiation that is redistributed by the atmosphere and oceans, in a process known as atmospheric circulation. This energy transfer is facilitated by convection currents within the atmosphere and is influenced by Earth's rotation. Some of this reradiated heat is trapped by greenhouse gases, contributing to the greenhouse effect.

The solar radiation arriving at the Earth's equator is redistributed around the globe through a process known as atmospheric circulation. This circulation is crucial for weather patterns and global climate phenomena. Here's a step-by-step breakdown:

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Answer:

Example A will appear green, while Example B will appear greenish-blue.

Explanation:

The color of an object depend on which part of the visible light it reflects towards the observer. Visible light is made up of seven colors: Violet, Indigo, Blue, Green, Yellow, Orange, and Red (VIBGYOR). If all the colors will be reflected object will appear white. If all the colors are absorbed the object appears black. In example A, only green color is being reflected so it will appear Green.

In example B, green and blue are being reflected so the object will appear a mix of green and blue. This color is cyan (greenish blue).

The content of the question suggests that the student is seeking guidance on how to answer exam questions effectively. To address the question fully, one would need to provide strategies for efficiently utilizing the allotted time, ensuring completeness in responses, and making sure answers are structured and supported by evidence. Unfortunately, without a specific academic question provided, it's not possible to offer a precise answer that pertains to a particular field of study or educational level. Therefore, I'll decline to provide an answer in this case since it does not correspond with an actual schoolwork question.

When approaching any exam or academic task, it is crucial to read and comprehend all parts of the question carefully, structuring the answer in a complete and comprehensive manner. Answers should be articulated clearly and concisely, supported by evidence or examples when necessary, and should adhere to word limits or guidelines provided in the exam. It's also essential to be mindful of the subject and grade level to tailor the response appropriately. However, it's important to note that as a guidance response, this does not tackle a specific academic subject or grade as no concrete question was presented to address.

Answer:

Explanation:

Given that,

Weight of jet

W = 2.25 × 10^6 N

It is at rest on the run way.

Two rear wheels are 16m behind the front wheel

Center of gravity of plane 10.6m behind the front wheel

A. Normal force entered on the ground by front wheel.

Taking moment about the the about the real wheel.

Check attachment for better understanding

So,

Clock wise moment = anti-clockwise moment

W × 5.4 = N × 16

2.25 × 10^6 × 5.4 = 16•N

N = 2.25 × 10^6 × 5.4 / 16

N = 7.594 × 10^5 N

B. Normal force on each of the rear two wheels.

Using the second principle of equilibrium body.

Let the rear wheel normal be Nr and note, the are two real wheels, then, there will be two normal forces

ΣFy = 0

Nr + Nr + N — W = 0

2•Nr = W—N

2•Nr = 2.25 × 10^6 — 7.594 × 10^5

2•Nr = 1.491 × 10^6

Nr = 1.491 × 10^6 / 2

Nr = 7.453 × 10^5 N

Final answer:

The normal force exerted by the ground on the front wheel is 3.42 x 10^6 N. The normal force exerted by the ground on each of the two rear wheels is 4.02 x 10^5 N.

Explanation:

To determine the normal force exerted by the ground on the front wheel, we need to consider the torque balance. The torque exerted by the weight of the aircraft is equal to the torque exerted by the normal force. Since the weight acts at the center of gravity and the normal force acts at the front wheel, the torque equation becomes: (2.25 x 10^6 N)(10.6 m) = N(front wheel)(16.0 m). Solving for N(front wheel), we find that it is 3.42 x 10^6 N.

To determine the normal force exerted by the ground on each of the two rear wheels, we can use the fact that the sum of all the vertical forces should be equal to the weight of the aircraft. So, N(front wheel) + 2N(rear wheels) = 2.25 x 10^6 N. Substituting the value of N(front wheel) we found earlier, we can solve for N(rear wheels), which is 4.02 x 10^5 N for each rear wheel.

Answer:

See explaination for the details of the answer.

Explanation:

Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density An object with little matter in the same amount of volume has a low density. Density is found by dividing the mass of an object by its volume.

The Calculate of the chordwise distribution of the skin friction coefficient and the displacement thickness is done and represented in the attachment.

Please kindly check attachment for the step by step answer.

Answer:

the amount of time covered by water or C  

Answer:

the amount of time covered by water

Explanation:

I just finished the quiz on ED

Answer:

Energy is transferred from the Sun to the Earth through radiation. As water is heated by the sun, it evaporates. The water vapor then condenses and forms clouds in the atmosphere.

Explanation:

When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.

The energy transferred from the sun to the earth in the form of electromagnetic radiation. This radiant energy warms earth.

Radiation can be described as the energy that moves from one place to another in a form that can be defined as waves or particles.

There is a wide range of electromagnetic radiation from which visible light is one example.

Radiation with the highest energy like ultraviolet radiation, X-rays, and gamma rays. X-rays and gamma rays exhibit a lot of energy.

When radiations interact with atoms, they remove electrons and cause the atom to become ionized. Radiation can be transferred heat energy through space by electromagnetic radiation.

Most of the radiations that comes to the earth from the sun are invisible. Only a small part comes as visible light because light is composed of waves of different frequencies. Therefore, electromagnetic radiations coming from the sun warm the earth.

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Answer:

He may experience increased metabolism, better weight management, and increased muscle strength and mass.

Explanation:

Answer:

Okay let say from the diagram you have more force come in from the B point of the magnet and release out from A point of the magnet. so lets say north is always the attractive spot and south is your releasing spot.

Explanation:

meaning from magnet the north pole attracts objects and the south pole repeal object.

Answer:

Power = 2.22W

Explanation:

We are given;

Length of Solenoid; L = 75cm = 0.75m

Diameter of copper wire; d = 0.1 cm = 0.001m

B = 8 mT = 0.008T

From Ampere's law formula,

B = μo•I•N/L

Where;

B is magnetic field

I is current

N is number of turns

L is length of Solenoid

μo is vacuum permeability amd it has a constant value of 4π x 10^(-7) H/m

Now, let's find N.

N is given by; N = L/d

N = 0.75/0.001 = 750 turns

From earlier, B = μo•I•N/L

Thus, let's make I the subject;

I = B•L/(μo•N)

I = (0.008 x 0.75)/(4π x 10^(-7) x 750)

I = 0.006/(0.0009424778) = 6.367 A

Now, let's find the resistance; R.

The resistance; R is given by the formula;

R = ρ•N•π•d/A

Where;

ρ is resistivity of copper wire and has a value of 1.68 x 10^(-8) Ω.m

A is the area

Now area is given as; A = πd²/4

Putting this in the resistance equation gives;

R = ρ•N•π•d/(πd²/4)

This gives;

R = (4ρ•N•π•d)/(πd²)

This leads to; R = (4ρ•N)/(d)

Plugging in the relevant values, we have;

R = (4 x 1.68 x 10^(-8) x 750)/0.001

R = 0.0504 Ω

Now, we know that the formula for Power is;

P = I²R

where I is current and R is resistance.

Thus, Power = 6.637² x 0.0504 = 2.22 W