HELP PLS MARKING BRANLIST 100 Pts TAKING TEST RN


A train moved at a constant speed of 63 m/s. How far will it travel in 120 seconds?

1.90 m

0.50 m


57 m

7.560 m

Answer:0.46 m/s^2.

Explanation:

The acceleration of the dog can be calculated by using the formula:

acceleration = (final velocity - initial velocity) / time

The initial velocity of the dog was 3 m/s, the final velocity was 9 m/s, and the time was 13 seconds.

acceleration = (9 m/s - 3 m/s) / 13 s = 0.46 m/s^2

Therefore, the acceleration of the dog was 0.46 m/s^2.

This is due to the fact that when kinetic energy is doubled, the speed of the block increases by the square root of 2, resulting in an increase of 40% in the velocity.

Kinetic energy is the energy of motion. It is the energy that an object has because of its motion. Kinetic energy can be found in a variety of forms such as thermal energy, electrical energy, and mechanical energy. Kinetic energy can be converted into other forms of energy such as potential energy. Kinetic energy is also known as the energy of motion and is associated with the movement of objects. When an object is moving, its kinetic energy increases, and when an object is at rest, its kinetic energy is zero.

Doubling the total energy of the block would double its kinetic energy, as the potential energy remains constant. Since the kinetic energy of the block is proportional to its speed squared, the maximum speed of the block would also be doubled, from 20cm/s to 40cm/s.

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A) Using Simpson's 1/3 rule (composite formula), the work done with a constant force of 200 N is approximately 1250 J.

B) Using the MATLAB function trapz, the work done is approximately 7750 J.

Let's substitute the given values into the Simpson's 1/3 rule formula and calculate the work done using a constant force of 200 N.

A) Force (F) = 200 N (constant for all t)

Velocity (v) = 4t (0 ≤ t ≤ 5) and v = 20 + (5 - t)² (5 ≤ t ≤ 15)

Step size (h) = 0.25

To find the work done using Simpson's 1/3 rule (composite formula), we need to evaluate the integrand at each interval and apply the formula.

Step 1: Divide the time interval [0, 15] into subintervals with a step size of h = 0.25, resulting in 61 equally spaced points: t0, t1, t2, ..., t60.

Step 2: Calculate the velocity at each point using the given expressions for different intervals [0, 5] and [5, 15].

For 0 ≤ t ≤ 5: v = 4t For 5 ≤ t ≤ 15: v = 20 + (5 - t)²

Step 3: Compute the force at each point as F = 200 N (since the force is constant for all t).

Step 4: Multiply the force and velocity at each point to get the integrand.

For 0 ≤ t ≤ 5: F * v = 200 * (4t) For 5 ≤ t ≤ 15: F * v = 200 * [20 + (5 - t)²]

Step 5: Apply Simpson's 1/3 rule formula to approximate the integral of the integrand over the interval [0, 15].

The Simpson's 1/3 rule formula is given by: Integral ≈ (h/3) * [f(x0) + 4f(x1) + 2f(x2) + 4f(x3) + 2f(x4) + ... + 4f(xn-1) + f(xn)]

Here, h = 0.25, and n = 60 (since we have 61 equally spaced points, starting from 0).

Step 6: Multiply the result by the step size h to get the work done.

Work done: 1250 J

B) % Define the time intervals and step size

t = 0:0.25:15;

% Calculate the velocity based on the given expressions

v = zeros(size(t));

v(t <= 5) = 4 * t(t <= 5);

v(t >= 5) = 20 + (5 - t(t >= 5)).^2;

% Define the force value

F = 200;

% Calculate the work done using MATLAB's trapz function

\(work_t_r_a_p_z\) = trapz(t, F * v) * 0.25;

% Display the result

disp(['Work done using MATLAB''s trapz function: ' num2str(\(work_t_r_a_p_z\)) ' J']);

The final answer for the work done using MATLAB's trapz function with the given force and velocity is:

Work done using MATLAB's trapz function: 7750 J

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Answer:

\(\huge\boxed{\sf F= 350 \ N}\)

Explanation:

Considering pivot as the central point,

Key:

\(F_1r_1=F_2r_2\)

Here,

Substitute the givens in the above formula.

\(F(1.2)=600(0.7)\\\\F(1.2)=420\\\\Divide \ 1.2 \ to \ both \ sides\\\\F=420/1.2\\\\F= 350 \ N\\\\\rule[225]{225}{2}\)

The pH-dependent protonation and deprotonation of PNP modulate the molecule's absorption spectra, resulting in a shift in the wavelength of maximum absorption, which can be observed as a change in color.

The effect of pH on p-nitrophenol (PNP) and its absorption spectra is primarily attributed to the protonation and deprotonation of the molecule. PNP is a weak acid with a phenolic hydroxyl group that can donate a proton. In acidic conditions (low pH), the phenolic group of PNP remains protonated. As the pH increases, the phenolic group starts deprotonating, resulting in the formation of the PNP anion.The absorption spectra of PNP are significantly influenced by the protonation state. In its protonated form, PNP exhibits absorption maxima at shorter wavelengths (lower energy), typically around 300-320 nm.

This absorption is due to the conjugation of the aromatic ring and the nitro group, which leads to a bathochromic shift (redshift) in the absorption spectrum.As the pH increases and PNP deprotonates, the absorption spectra shift towards longer wavelengths (higher energy). The deprotonated PNP anion shows absorption maxima around 400-420 nm. This shift occurs because deprotonation disrupts the conjugation, altering the electron delocalization in the molecule and causing a hypsochromic shift (blueshift) in the absorption spectrum.

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Number of electrons transferred in this process are given by = 3.125 x 10^11 electrons

The smallest elemental component of an atom, the electron has a negative charge. In a neutral atom, there are an equal number of electrons and protons. One electron but one proton are all that the hydrogen atom has. On the other hand hand, the uranium atom includes 92 protons, this means 92 electrons.

Given:

q = magnitude of charge gained by balloon = 50 nC = 50 x 10^-9 C

e = magnitude of charge on electron = 1.60 x 10^-19 C

When you rub balloon on your head, the electrons from your head migrate to balloon. As a result balloon becomes negatively charged and your head becomes positively charged.

We can compute the number of electrons transferred in the process as follows:

Let N = number of electrons transferred in this process = q / e

N = q / e = (50 x 10^-9 C) / (1.60 x 10^-19 C) = 3.125 x 10^11 electrons

N = 3.125 x 10^11 electrons [answer]

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The Big Bang theory allows finding the result for which particles were formed in the 1 s of the universe is:

The Big Bang theory says that the universe is formed about 14 billion years ago, of a structure that is very high energy.

Einstein's equation establishes the relationship between energy and matter, establishing that energy can be converted into matter.

              E = m c²

Where E is energy, m is mass, and c is the speed of light.

In the 1 s of the universe the energy density was so high that all subatomic particles were formed, the first being quarks.

When the universe cooled enough, the quarks combined to form protons and neutrons, from which atoms were formed.

In conclusion, using the Big Bang theory we can find the result for which particles were formed in the 1 s of the universe is:

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Answer:

Angular momentum is inertia of rotation motion. Linear momentum is inertia of translation motion. The big difference is that the type of motion which is related to each momentum is different. It is important to consider the place where the force related to rotation applies, which is appears as 'r' in the formula.

A 10-solar-mass main-sequence star will most likely produce a neutron star as its remnant. The correct answer is B) neutron star.

A solar-mass main-sequence star refers to a star with a mass similar to that of our Sun, and in this case, the star in question is 10 times more massive. When a massive star like this reaches the end of its life cycle, it goes through a series of events, including the formation of various elements through nuclear fusion. Eventually, the core collapses, and an explosive event known as a supernova occurs.

The remnant left behind after the supernova depends on the mass of the original star. For a star with a mass between 1.4 and 3 solar masses, the core collapses into a dense, compact object known as a white dwarf. However, for a star with a mass between 3 and 20 solar masses, the core collapses even further, forming a neutron star. Neutron stars are incredibly dense and consist primarily of neutrons.

For a star with a mass greater than 20 solar masses, the core collapses completely, and a black hole forms. In the case of a 10-solar-mass main-sequence star, the most likely outcome is the formation of a neutron star, as its mass falls within the range associated with neutron star formation.

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Answer:

In most plants, the leaves are the main food factories. They capture the sun's energy with the help of chlorophyll in the leaf cells. The chlorophyll traps and packages the energy from the light of the sun in a process called photosynthesis. Leaves usually have a large surface so they can collect the most sunlight.

Explanation:

Hope this helps...maybe

Answer:

C

Explanation:

Answer:

Coording metal is a physical change.

Answer:

11.91 s

Explanation:

274/23=11.91 Second

Answer:

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

Answer:

2.4 secs.

Explanation:

Current (A) = Charge (coulomb)/Time(sec)

We are looking for time. So:

Time (sec) = Charge (coulomb)/Current (A)

↓

12coulombs/5.0A = 2.4 secs

The term used to describe how easily something stretches is known as "elasticity." It refers to the ability of a material to deform under stress and return to its original shape when the stress is removed.

Elasticity is a fundamental property of materials that determines their response to applied forces. It measures the degree to which a material can stretch or deform when subjected to an external force and then regain its original shape when the force is removed. This property is essential in various fields, including engineering, physics, and materials science.

When a material is subjected to stress, such as tension or compression, its atoms or molecules experience internal forces that cause them to rearrange and deform. The ease with which this deformation occurs is a measure of the material's elasticity. Materials that can be easily stretched or compressed and quickly return to their original shape are considered highly elastic. In contrast, materials that undergo significant permanent deformation or fail to return to their original shape are considered less elastic.

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Answer:

M= mv= 10kg x 37 m/s= 370 Kg x m/s

A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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Answer:

The blue one.

Explanation:

Im pretty sure its because the blue is hotter.

Answer:

What question?

Explanation:

Answer:

Answer is negative -2 think about this is basically a sbrtaction problem the number starts at 12 and then it moves 14 to left which means backwards so 12-14=-2 so thats were u get -2 as your answer.

Explanation:

wanted to help people plus I am doing the quiz right now.

Answer: Alicia and the president do not have enough of a particular resource. Alicia doesn’t have enough time, and the president doesn’t have enough money.

Explanation: This is Plato's sample answer.

Answer:

sorry I am not getting dear friend

The weight of person on the moon can be given as,

Substitute the known values,

Thus, the weight of person on the moon is 18.7 N,

Answer:

b

Explanation:

High temperatures and pressure are required for the fusion to occur to overcome the repulsion between the protons in the nuclei that join. Thus, the correct option is B.

Nuclear fusion is a reaction in which the two or more atomic nuclei are combined with each other to form one or more different atomic nuclei and subatomic particles. The difference in mass between the different reactants and products is manifested as either the release or the absorption of energy.

For the high temperature and pressure, it provides kinetic energy to overcome the repulsion between them. And for the high pressure, it helps to reduce the distance between any two hydrogen atoms so it again fuse.

Therefore, the correct option is B.

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Answer:

B on EDGE

Explanation:

Answer:

D. rusting is answer....

Answer:

first object final velocity =2m/s

second = 12m/s

Explanation:

i hope this will help you,..,

When two objects are separated by a distance then gravitational attraction between them is 1.36 × 10^-9 N.

Given,

m = 1.5 × 10^5 kg

M = 8.5 × 10^2 kg

r = 2500 m

F=GmM/r^2

Here G = 6.67 × 10^-11 N.m^2/kg^2 is the value of the gravitational constant

F = 1.36 × 10^-9 N

Every body in the universe attracts every other body with a gravitational force that decreases with distance as 1/r2. But actually he knew more about the gravitational force: from the fact that bodies of different masses near the earth’s surface accelerate downwards at the same rate, using F = ma (Second Law).

If two bodies of different masses have the same acceleration they must be feeling forces in the same ratio as their masses (so a body twice as massive feels twice the gravitational force), that is, the gravitational force of attraction a body feels must be proportional to its mass.

Newton’s first clue that gravitation between bodies fell as the inverse-square of the distance may have come from comparing a falling apple to the falling moon, but important support for his idea was provided by a detailed description of planetary orbits constructed half a century earlier by Johannes Kepler.

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Answer:

C

Explanation:

Prevents further damage to the network cable.