Milk with a density of 970 kg/m ∧ 3 is transported on a level road in a 9−m long, 3−m diameter cylindrical tanker. The tanker is completely filled with milk, i.e., no air space in the tank. If the truck is accelerating from a stop signal at 7.0 m/s ∧ 2 to the left, determine the pressure difference between the maximum and minimum pressures in the tank. Depict on the figure the location of the minimum and maximum pressures in the tank.

Answer:

sill 100?

Explanation:

The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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Answer: acceleration is when speed increase

Answer:

15.61 m/s^2

Explanation:

From 3 rd equation of motion

s=ut+1/2at^2

given s = 30

u= 0 ( as body was at rest)

t= 1.96s

30=0*1.96+1/2a(1.96)^2

30=0+1/2a(1.96)^2

a=2*30÷(1.96)^2

a= 15.61 m/s^2 (approx)

Answer:

25.8 m/s

Explanation:

Initial Velocity (u) =?

Final velocity before it starts to fall ; v = 0

Distance (S) = 34 meters

Using the relation :

v² = u² + 2aS

a = - 9.8 m/s²

0 = u² + 2(-9.8)(34)

0 = u² - 666.4

u² = 666.4

u = √666.4

u = 25.814724

Hence, vertical velocity when the rock leaves her hand is 25.8 m/s

A one-time pad is a type of encryption that is completely unbreakable if it is done correctly. It works by generating a random key that is at least as long as the message being encrypted. The key is then combined with the message using an XOR operation.

This produces a ciphertext that cannot be decrypted without the key. The key is used only once and then discarded, hence the name "one-time pad". A one-time pad is completely unbreakable because there is no pattern to the key that can be used to decrypt the message. Each character in the key is generated randomly and independently of the other characters. Therefore, the key is completely unpredictable. Even if an attacker knows the key length and has access to the ciphertext, they cannot use any techniques to decrypt it.

This is because there is no pattern to the ciphertext that can be used to determine the key.The only way to decrypt a one-time pad is to have the key. If an attacker tries to brute-force the encryption by trying all possible keys, they will generate every possible message that is the same length as the original message. This means that the ciphertext is completely meaningless without the key. It is therefore important to keep the key secret and ensure that it is only used once. ,Message: yellow stone Key: wolf To encrypt the given message using the vigenere cipher, we follow the steps below:Step 1: Write the message and key in a tabular form as shown below. To keep the process organized, we use the letters of the key to label the columns.

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It take 1 hour 33 minute for all the ice to melt.

The heat or energy that is absorbed or released during a substance's phase change is known as latent heat. It might go from a solid to a liquid or from a liquid to a gas, or vice versa. Enthalpy, a characteristic of heat, is connected to latent heat.

Given parameters:

Mass of the ice: m=  0.6kg.

Heat enters though the insulator each second , H = 35.564J.

latent heat of fusion for ice: L =  3.335×10⁵ J/kg.

So, time taken for all the ice to melt = mL/H

=   0.6 × 3.335×10⁵/35.564 second

= 5626 second

= 1 hour 33 minute.

Hence,  It take 1 hour 33 minute for all the ice to melt.

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Answer:

A vegetarian diet that includes no meet is the best description of a balanced diet

Answer:

I should be B

Explanation:

extra characters lolhrhhdhfhdjdbfjsjf

An alpha particle is moving at a speed of 5.0 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 0.040 T. The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg. (a) What is the radius of the path of the alpha particle? speed of alpha particle,

Magnetic field,

Charge of alpha particle,

The structure of alpha particles, also known as alpha rays or alpha radiation, is similar to that of the helium-4 nucleus and is made up of two protons and two neutrons bonded together. They can also be created in various ways, although typically they are created during the alpha decay process. The Greek letter "alpha" serves as the inspiration for the naming of these particles. The alpha particle is represented by the symbols or 2+. They can occasionally represent a helium ion with a +2 charge since they are identical to helium nuclei (missing its two electrons). The alpha particle transforms into a typical (electrically neutral) helium atom once the ion absorbs electrons from its surroundings.

The net spin of alpha particles is zero.

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Answer:

\( \frac{V}{T} = \frac{V'}{T'}\)

Explanation:

Given the following data;

Original volume = V

New volume = V'

Original temperature = T

New temperature = T'

To write an expression for Charles's law;

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

\( \frac {V}{T} = K\)

\( \frac{V}{T} = \frac{V'}{T'}\)

Answer:

A final velocity that is faster than an initial velocity.

Explanation:

The acceleration of an object is given by :

\(a=\dfrac{v-u}{t}\)

Where

v is final velocity and u is initial velocity

t is time taken

If the final velocity is more than the initial velocity, the acceleration is positive. So, the correct option is (a).

Answer:

128J

Explanation:

K.E = MV² ÷ 2

K.E = 16 × 4² ÷ 2

K.E = 16 × 16 ÷ 2

K.E = 256 ÷ 2

K.E = 128J

:. it's kinetic energy is 128Joules(J)

The force applied by the bullet on the wood is 20 N.

The force applied by the bullet is calculated by applying the following kinematic equation and Newton's second law of motion as shown below.

F = ma

where;

The acceleration of the bullet is calculated as follows;

v² = u² - 2as

where;

when the bullet stops, the final velocity, v = 0

0 = u² - 2as

2as = u²

a = u² / 2s

a = ( 10² ) / ( 2 x 0.05 )

a = 1,000 m/s²

The force applied by the bullet on the wood is calculated as follows;

F = ma

F = ( 0.02 kg ) x ( 1000 m/s² )

F = 20 N

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The complete question is below:

A  bullet of 20 g is shot at 10m/s and is stopped by a piece of wood. The bullet goes 5cm into the piece of wood. Find the force applied by the piece of wood on the bullet

A superheated cloud of gas and dust swirling around a massive object (usually a black hole or neutron star) is called an accretion disk. The correct option is c.

Accretion disk is a heavy object surrounded by flow of gas, plasma, dust, or particles.  The materials surrounding the heavy object orbiting in the gravitational field of the object that loses energy and angular momentum as it slowly spirals inward.

This cloud can reach incredible speeds and temperatures as gravity causes it to build up more and more friction, eventually releasing x rays.

Thus, accretion disk is a superheated cloud of gas and dust swirling around a massive object.

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Answer:

Boiling point

Explanation:

(a) The distance of the image of the pencil from the lens is determined as 6 m.

(b) The image formed is upright, because it is magnified.

The distance of the image formed is determined by applying lens formula as shown below;

1/f = 1/v + 1/u

1/v = 1/f - 1/u

1/v = 1/2 - 1/3

1/v = (3 - 2)/6

1/v = 1/6

v = 6 m

M = v/u

M = 6/3

M = 2

A convex lens forms an upright and magnified image.

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Answer:

Explanation:

The Himalayan mountain range and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and continues today. 225 million years ago (Ma) India was a large island situated off the Australian coast and separated from Asia by the Tethys Ocean.

Momentum formula:

\(p=mv\)

momentum(measured in n*s) = mass(measured in kg) * velocity(measured in m/s)

__________________________________________________________

Given:

\(m=5kg\)

\(v=2m/s\)

\(p=?\)

__________________________________________________________

Finding momentum:

\(p=mv\)

\(p=5\times2\)

__________________________________________________________

Answer:

\(\fbox{p = 10 N*s}\)

Answer:p = 10 n*s

Explanation:

Given data:

* The mass of the shuttle is,

* The acceleration of the shuttle is,

Solution:

According to newton's second law, the lifting force of the shuttle is,

Hence, the lifting force of the shuttle is 6000 kN.

False. The calorie used in physics (also known as the "gram calorie" or "small calorie") is the amount of energy required to raise the temperature of one gram of water by one degree Celsius.

It is equal to 1,000 small calories and is the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius.

The calorie used in measuring the energy content of food (also known as the "kilocalorie" or "large calorie")  often abbreviated as "kcal", it represents the amount of energy obtained from the food when it is metabolized in the human body. So when we refer to "calories" on food labels or in discussions about nutrition, we are actually referring to kilocalories.

Therefore, the two units of measurement are not the same.

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The normal result of the trade wind blowing from South America to Indonesia and Australia warm water produces rainy weather in Indonesia and Australia. Option D

We know that the trade winds are the winds that tend to originate at the north east or the south eastern parts of the hemisphere and tend to be blowing across the seas towards the equator. Thus we can see that the focus of the trade winds is the equator and they emanate from north or south.

One of the effects of the trade winds is that they make the wind warmer and that would make to the emergence of a warmer weather and this would spread to the other parts of the word as we can see from map studies.

The effects of the trade winds  blowing from South America would tend  to be much more felt around the areas of  Indonesia and Australia and this is very important to weather changes around those areas.

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Answer:

Explanation:

Redshift of Galaxies. The redshift of distant galaxies means that the Universe is probably expanding. ...

Microwave Background. Very early in its history, the whole Universe was very hot. ...

Mixture of Elements. As the Universe expanded and cooled down, some of the elements that we see today were created. ...

Looking back in time.

The earliest and most direct observational evidence of the validity of the theory are the expansion of the universe according to Hubble's law (as indicated by the redshifts of galaxies), discovery and measurement of the cosmic microwave background and the relative abundances of light elements produced by Big Bang ...

The contradictions between Big Bang theory predictions and observations are not at all limited to those that have been widely dubbed a “Crisis in Cosmology”.  Despite the continuing popularity of the theory, essentially every prediction of the Big Bang theory has been increasingly contradicted by better and better data, as shown by many teams of researchers. The observations are, on the other hand, consistent with a non-expanding universe with no Big Bang. The real crisis in cosmology is that the Big Bang never happened.

Key contradicted predictions (detailed descriptions below):

1) Light elements: Lithium and Helium

Prediction: Any superhot explosion throughout the universe, like the Big Bang, would have generated a certain small amount of the light element lithium and a large amount of helium.

Observation: Yet as astronomers have observed older and older stars, the amount of lithium observed has gotten less and less, and, in the oldest stars is less than one tenth of the predicted level. The oldest stars near to us have less than half the amount of helium predicted. However, well-understood fusion processes in stars and reactions initiated by cosmic rays have accurately predicted the correct amounts of these and other light elements.

2) Antimatter-matter annihilation

Prediction: Since the intense radiation of the Big Bang would produce matter and antimatter in equal amounts, mutual annulation of particle-antiparticle pairs would reduce the surviving matter density to around    10 -17 protons/cm3.

Observation: the matter density in the universe is observed to be at least 10 -7 ions /cm3 more than 10 billion times higher than the Big Bang prediction.

Big Bang fix to prediction: To try to fix this well-known vast gap, Big Bang theorists have proposed some unknown asymmetry between matter and antimatter which would lead to more production of matter. This has never been observed in laboratory experiments. A consequence of this predicted imbalance is the decays of the proton, initially predicted to decay with a lifetime of 1030 years. Large scale experiments have contradicted this prediction was well, with no evidence of decay at all.

3) Surface-Brightness

Prediction: In any expanding universe, an optical illusion makes objects at high redshift appear larger and dimmer, so their surface brightness—the ratio of apparent brightness to apparent area—declines sharply with redshift.

Observation: Based on observations of thousands of galaxies, surface brightness is completely constant with distance, as expected in a universe that is NOT expanding.

Big Bang fix to Prediction: After observations showed that the surface brightness dimming did not occur, Big Bang theorists hypothesized that galaxies were much smaller in the distant past and have grown greatly. But observations have contradicted this fix as well, showing that there have not been enough galaxy mergers for the growth rates needed. In addition, the ultra-small galaxies hypothesized would have to have more mass in stars than total mass, an obvious impossibility.

4) Too Large Structures

Prediction: In the Big Bang theory, the universe is supposed to start off completely smooth and homogenous. Structure starts small and grows over time

Observation: As telescopes have peered farther into space, huger and huger structures of galaxies have been discovered, which are too large to have been formed in the time since the Big Bang.

This research tests a striking 1930s prediction of Big Bang hypothesis that objects at great distances should actually appear larger, not smaller. According to the hypothesis, this is because of an optical illusion due to the galaxies having been much closer when their light was emitted.

This prediction was repeated in the literature through the 1980s but in the 1990s, the Hubble Space Telescope did not confirm the prediction. Hubble’s images instead showed that the most distant galaxies do in fact look the smallest. A group of researchers then formulated an additional hypothesis that galaxies actually grow in size with time.      

Many researchers, including Dr. Scarpa, have demonstrated evidence that a small modification of gravitational forces, termed MOND, could also explain the data.  

The school of psychology that emphasizes direct observation rather than introspection is behaviorism.

The central tenet of behaviorism is that all actions are acquired through observation of the environment. According to this learning theory, behaviors are acquired through interaction with one's environment, and that characteristics that are innate or hereditary have very little bearing on an individual's behavior.

Teachers rewarding their school or particular pupils with a party or special gift at the end of the week for excellent behavior throughout the week is an example of behaviorism. Punishments utilize the same idea. If the student misbehaves, the teacher has the authority to revoke some rights.

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The period of the pendulum is √2 seconds.

We need to know about pendulum experiments to solve this problem. The pendulum is a simple experiment to calculate gravitational acceleration. The gravitational acceleration can be calculated by

g = 4π² . L / T²

where g is gravitational acceleration, L is the length of the string and T is the period.

From the question above, we know that:

T1 = 1 s

L1 = 5 cm

L2 = 10 cm

By using proportionality, the squared period is proportional to the length. Hence,

T² ~ L

Using the ratio, we can write

T1² / T2² = L1 / L2

1² / T2² = 5 / 10

1 / T2² = 1 / 2

T2² = 2

T2 = √2 second

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Answer:

your answer is 11

Explanation:

Answer:

The Tesla moves approx. 25 meters from rest before reaching 60 mi/hr

Explanation:

Given:

Initial velocity = 0 m/s

Final velocity = 26.8 m/s

Time = 1.9 seconds

Acceleration = change in velocity/time

\(a = \frac{26.8}{1.9}\)

The equation to find displacement (Δx) with given starting and final velocity, time, and acceleration is:

\(x = x_{0} + v_{0}t + \frac{1}{2} at^{2}\)

Starting position and initial velocity both equal 0, so

\(x = \frac{1}{2} at^{2}\)

\(x=\frac{1}{2} (\frac{26.8}{1.9})(1.9)^{2}\)

x = 25.46m

Rounded to the nearest whole number, x = 25m

The force of air resistance is approximately 3987 N.

Air resistance, also known as drag, is the force that opposes the motion of an object through a fluid (such as air). It arises from the interaction between the object and the fluid, and depends on factors such as the object's shape, size, speed, and the properties of the fluid (such as its density and viscosity). In the case of a helicopter flying horizontally, air resistance pushes against the direction of motion, and its magnitude is equal to the horizontal component of the lift force.

To find the force of air resistance, we need to resolve the lift force into its horizontal and vertical components. The vertical component equals the weight of the helicopter, which we can calculate using the formula:

Weight = mass x gravity

Assuming a mass of 4500 kg and a gravity of 9.81 m/s^2, we get:

Weight = 4500 kg x 9.81 m/s^2 = 44145 N

The horizontal component of the lift force equals the force of air resistance, since the helicopter is flying horizontally at constant speed. To calculate it, we can use the formula:

Force of air resistance = Lift force x sin(81.3°)

Substituting the given values, we get:

Force of air resistance = 40500 N x sin(81.3°) = 3987 N

Therefore, the force of air resistance is approximately 3987 N.

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The given statement "Successful replication means that certain conclusions about behavior have been repeated in multiple experiments" is true.

Replication refers to the practice of conducting scientific experiments more than once in order to assess the consistency of the outcomes and the validity of the research methods used. Replication provides an important basis for the validation and assessment of research findings. The findings of a study can only be regarded as reliable and meaningful if they can be replicated by other scientists in independent experiments. This is especially true in fields like psychology and medicine where the results can have real-life implications. Replication, when done correctly, enables researchers to establish the reliability and generalizability of their findings, ensuring that any conclusions reached are accurate and meaningful.

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Answer:

33.3

Explanation:

Potential energy =

mass × gravitational field strength × height

rearranged =

\( \frac{potential \ energy}{mass \: \times gravity} = height\)

\( \frac{15000}{45 \times 10} \)

(The earths gravitational field strength will always be 10)

=33.33333 recurring to 1dp its 33.3