I JUST NEED ANSWER Mass mA rests on a smooth horizontal surface, mB hangs vertically. a) If mA =15.0 kg and mB =3.0 kg in the figure (Figure 1), determine the magnitude of the acceleration of each block. b) If initially mA is at rest 1.200 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely? c) If mB =1.0 kg , how large must mA be if the acceleration of the system is to be kept at [tex]\frac{1}{100}[/tex] g?

The coefficient of static friction needed for a drag racer to cover the given distance is 1.27.

The magnitude of the acceleration of the slipping tires is calculated by applying the kinematic equation for average distance travelled by the slipping tires as shown below.

s = ut + ¹/₂at²

where;

s = 0 + ¹/₂at²

s = ¹/₂at²

at² = 2s

a = 2s/t²

a = (2 x 1,400 m) / (15 s)²

a = 12.44 m/s²

The coefficient of static friction needed for a drag racer to cover the given distance is calculated as;

μ = a/g

where;

μ = 12.44 / 9.81

μ =  1.27

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Answer:

Kate did not do any work on the wall , because the wall did not move

Answer:sin40∘=0.643) Hint: The relationship of angle of incidence and angle of refraction at interface of two media is given by Snell's law.

Explanation:

Answer:

mean extremely affect by the two level of values

highest and lowest points

(a.i) The magnitude of the centripetal acceleration at its edge is 28,197.04 m/s².

(a. ii) In terms of multiple of g, the centripetal acceleration is 2,874.3 g.

(b) The linear speed is determined as 48.96 m/s.

The magnitude of the centripetal acceleration of the workshop grindstone is calculated by applying the following kinematic equation.

a = v²/r = ω²r

where;

The given parameters include;

ω = 5500 rev/min

ω = 5500 rev/min   x   2π rad/rev x  1 min / 60 s

ω = 575.96 rad/s

a = (575.96²) x (0.085)

a = 28,197.04 m/s²

In terms of acceleration due to gravity (g);

a = 28,197.04 m/s² / 9.81 = 2,874.3 g

The linear speed of the grindstone is calculated as follows;

v = ωr

v = 575.96 rad/s  x  0.085 m

v = 48.96 m/s

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Answer:

Explanation:

p₁ = m₁·V₁ = 6300·0.11 = 693 kg·m/s

p₂ = m₂·V₂ = 50·10.4 = 520 kg·m/s

693 kg·m/s > 520 kg·m/s

Answer:

P = P1 + P2     where P is a vector quantity

P1 = P2 = .10 kg * 30.0 m/s = 3 kg-m/sec

P = (p1^2 + p2^2)^1/2      add vectors and find magnitude of resultant

p = (3.0^2 + 3.0^2)^1/2 = 4.24      length of resultant vector

Since vectors are at right angles p is the length of the hypotenuse

tan θ = 3.0 / 3.0 = 1      where theta is measured with respect to the positive x-axis and will be below that axis

θ = tan^-1 1 = 45 deg      (45 degrees below positive x-axis)

One can find the value of tan θ from the length of the x-y vectors and from tan θ obtain θ

Answer:If the momentum is large on the other hand, you will cause turbulences that make the water splash , So Yes

Explanation:

Science employs technology to create new discoveries, while technology uses science to address problems. Science and technology, however, pursue distinct objectives. Science seeks to provide answers and advance knowledge. The purpose of technology is to resolve real-world issues. Despite having differing objectives, science and technology coexist and support one another. For the development of new technologies like the space telescope, scientific knowledge is used.

There are numerous such instances that demonstrate how science and technology may collaborate.

The microscope is one instance. Galileo might have created it at the same time as the telescope. The development of the microscope was based on scientific understanding of light and lenses, just like the development of the telescope.

How do you believe the development of the microscope aided in the advancement of science?

The microscope enabled researchers to see a universe of microscopic things they had never seen before. Numerous significant scientific advancements resulted from it, including the identification of cells—the fundamental constituents of all living things.

Therefore, science and technology help each other evolve and develop.

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The angular acceleration of the wheel 0.16 rad/sec².

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

Given in the question,

angular acceleration = 4/25

angular acceleration = 0.16 rad/sec²

The angular acceleration of the wheel 0.16 rad/sec².

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Answer:

W1 = d1 V

W2 = d2 V         weight of balls in air (both have same volume0

w2 = (d2 - p) V     apparent weight of ball 2      (p * V = buoyant force

w2 / w1 = (d2 - p) / (d1 - p)    the liquid exerts the same buoyant force on each ball

Let p be in units of kg / m^3 * g       say 1 N / m^3

Suppose d1 = 2 and d2 = 3     N/m^3 and p = .5 N/m^3

The ratio of apparent weights would be

w2 / w1 = (3 - .5) / (2 - .5) = 1.67 to 1

The horizontal distance travelled by the car in the given time period of 13 seconds is determined as 168.3 m.

The horizontal distance travelled by the car is calculated as follows;

s = ut + ¹/₂acosθ(t²)

where;

s = 0  +  ¹/₂(2) x cos(5.2) x (13)²

s = 168.3 m

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Answer:hope this helpsss

Explanation:

A permanent magnet that is always aligned with the magnetic field of the earth makes up the magnetic needle of a magnetic compass, which is used for navigation.

The magnetic field is produced by an electric current in an electromagnet. Because they are transient magnets, electromagnets lose their magnetic properties as soon as the current is interrupted.

The volume flow rate at which the water flows is 0.0188 m³/s

Since the horizontal pipe 10.0 cm in diameter has a smooth reduction to a pipe 5.00 cm in diameter and If the pressure of the water in the larger pipe is 8.00 × 10⁴ Pa and the pressure in the smaller pipe is 6.00 × 10⁴ Pa, since we require the rate at which water flows through the pipe, we use Bernoulli's equation at constant height to find the speed of flow.

Bernoulli's equation governs flows through pipes. It is given by

P₁ + ρgh₁ + 1/2ρv₁² = P₂ + ρgh₂ + 1/2ρv₂² where

With h₁ = h₂, the Bernoulli's equation becomes

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂²

Using the volume flow rate equation

Q = A₁v₁ = A₂v₂ where

So, A₁v₁ = A₂v₂

(πd₁²/4)v₁ = (πd₂²/4)v₂

d₁²v₁ = d₂²v₂

Making v₂ subject of the formula, we have

v₂ = d₁²v₁/d₂²

v₂ = (d₁/d₂)²v₁

Substituting v₂ into the Bernoulli equation, we have

P₁ + 1/2ρv₁² = P₂ + 1/2ρv₂²

P₁ + 1/2ρv₁² = P₂ + 1/2ρ(d₁/d₂)⁴v₁²

Making v₁ subject of the formula, we have

1/2ρv₁² - 1/2ρ(d₁/d₂)⁴v₁² = P₂ - P₁

1/2ρ[1 - (d₁/d₂)⁴]v₁² = P₂ - P₁

v₁² = √{2(P₂ - P₁)/ρ[1 - (d₁/d₂)⁴]}

Given that

Substituting the values of the variables into the equation, we have

v₁ = √{2(P₂ - P₁)/ρ[1 - (d₁/d₂)⁴]}

v₁ = √{2(6.00 × 10⁴ Pa - 8.00 × 10⁴ Pa)/1000 kg/m³[1 - (10.0 cm/5.0 cm)⁴]}

v₁ = √{2(- 2.00 × 10⁴ Pa)/1000 kg/m³[1 - 2⁴]}

v₁ = √{(- 4.00 × 10⁴ Pa)/1000 kg/m³[1 - 8]}

v₁ = √{(- 4.00 × 10⁴ Pa)/1000 kg/m³[-7]}

v₁ = √{(40.0 × 10³ Pa)/7 × 10³ kg/m³}

v₁ = √{(40.0/7 Pam³/kg}

v₁ = √{5.7143 Pam³/kg}

v₁ = 2.39 m/s

Since the volume flow rate Q = A₁v₁ = (πd₁²/4)v₁

Given that

Substituting the values of the variables into the equation, we have

Q = (πd₁²/4)v₁

Q = π(0.1 m)²/4 × 2.39 m/s

Q = π × 0.01 m²/4 × 2.39 m/s

Q = π × 0.0239 m³/s/4

Q = 0.0751 m³/s ÷ 4

Q = 0.0188 m³/s

So, the water flows at a rate of 0.0188 m³/s

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The amount of current flowing in the wire, given that it has a resistance of 25 Ω and connected to a 3.0 V is 0.12 A

From Ohm's law, we understood that the voltage, current and resistance are related according to the following formula:

Voltage (V) = Current (I) × resistance (R)

V = IR

With the above formula, we can obtain the current in wire. Details below.

The following data were obtained from the question:

Thus, the current can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

3 = Current × 25

Divide both sides by 25

Current = 3 / 25

Current = 0.12 A

Thus, we can conclude that the current in the wire is 0.12 A

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The age of the rock is 9 * 10^9 years and there is no rock that can be as old as this age on earth.

The term radioactive decay has to do with the process by which a radioactive nuclide disintegrates so as to obtain the daughter nucleus. The radioactive decay may occur by alpha or by beta radiation.

In this case, we are told that only 25% of the original uranium 238 isotope of half life 4.5 * 10^9 years still remains.

Using the formula;

0.693/[tex]t_{\frac{1}{2}[/tex] = 2.303/t log (No/N)

[tex]t_{\frac{1}{2}[/tex] = half life of the isotope

N= amount of isotope at time t

No = amount of isotope initially present

Then;

0.693/4.5 * 10^9 = 2.303/t log(No/0.25No)

1.54 * 10^-10 =  1.39/t

t = 1.39/1.54 * 10^-10

t = 9 * 10^9 years

There is no rock that is this much old since the average age of the earth is 4.5 billion years.

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The  argument by analogy (regarding other minds) and the objection against it is that:

Russell thinks there are other minds due to the fact that he can see behaviors in others that are similar to his own without giving them any conscious thought. He contends that thoughts are the root of all behavior, but what happens when a thought results in a reaction that one forces upon oneself.

Therefore, the traditional philosophical defense of the existence of other minds is the argument from analogy, which, as persuasively put forth by John Stuart Mill, a 19th-century empiricist, claims that since one's body and outward behavior are observably similar to those of others, one is justified by analogy in thinking that others have feelings similar to one's own and are not just automatons with similar bodies and outward behaviors.

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Answer:

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

Explanation:

Answer:

The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.

(also, you have a typo. it's Newton, not Newtown)

The mass of the lighter star is 2.15 x 10³⁰ kg.

The mass of the lighter star is obtained by applying the formula force gravitational potential energy between the two stars.

According to Newton's law of universal gravitation, every two objects in the universe attracts each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between the two objects.

U = F x r

U = Gm₁m₂/r²   x   r

U = Gm₁m₂/r

where;

r = 3 x 10⁸ m/s  x 3.154 x 10⁷ s/yr

r = 9.46 x 10¹⁵ m

let the lighter star = m₁

then, the heavier star = 2m₁

U = (G x m₁ x 2m₁)/r

U = 2Gm₁²/r

Ur = 2Gm₁²

m₁² = Ur/2G

m₁ = √(Ur/2G)

m₁ = √(6.5 x 10³⁴ x 9.46 x 10¹⁵ / 2 x 6.626 x 10⁻¹¹)

m₁ =  2.15 x 10³⁰ kg

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Answer:

b. Is the answer because It depends on what Galileo Galilea thinks :,-)

Galileo most likely have to do this in order to convince other scientists that his observations were correct, is repeats the experiment multiple times in front of witnesses. So the correct option is C.

Galileo probably had to repeat his tests multiple times in front of witnesses to present convincing proof to other scientists rather than keeping the results to himself, making an object fall faster, or just publicizing his results.

Scientific certainty is produced by repeating an experiment and observing the outcomes, which is still regarded as a key component of the scientific method in modern times.

Galileo would have benefited from documenting his procedures and conclusions in a way that allowed other scientists to replicate his experiment and confirm his findings, even though it wasn't mentioned in your multiple-choice answers.

This concept is largely covered by the peer-review procedure used in contemporary science. So the correct option is C.

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The work that is done by a forklift raising a 583 kg box a distance of 1.2m is 699.6N.

Work refers to the measure of energy expended in moving an object. It is most commonly calculated by multiplying the force by the distance.

This means that no work is done if the object does not move. This means that the work done can be calculated as follows:

Work done = Force × distance

According to this question, a forklift raises a 583kg box over a distance of 1.2m. The work done can be calculated as follows:

Work done = 583kg × 1.2m

Work done = 699.6N

Therefore, 699.6N is the force required to lift the box.

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If an evaporator has a vapour pressure drop of 10 psig and the low side pressure is 15 psig,  pressure at the inlet of the evaporator will be 25 psig

change pressure=  low side pressure-pressure drop

change pressure=15-(-10)

change pressure=25 psig

The vapor pressure of a liquid, sometimes referred to as the equilibrium pressure of a vapor above its liquid, is the pressure of the vapor produced by the evaporation of a fluid (or solid) over a sample of the liquid (or solid) in such a closed container (or solid).

Vapor pressure is the term for the force that is produced as liquids evaporate. Three factors commonly have an effect on a vapor press: surface area, intermolecular forces, and temperature. The vapor pressures of molecules change with temperature.

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The fact that Pedro likes to talk to people means that Pedro is an extrovert.

We define an extrovert as a person that is able to interact very much freely with other people. It is one of the kinds of temperaments that a person can have. We know that people that can have very different temperament types and these are the things that determine the behavior of a person.

Thus, a person acts in accordance with the kind of temperaments that a person has. Just as we can see in the person of Pedro. We are told in his case that the person Pedro would always like to talk with is friends and the team mates which suggests that he must like to associate with other people.

From our definition of the person of Pedro in the lines that are above, we can say the Pedro is an extrovert.

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Answer:

hydrogen

Explanation:

The Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen (about 70%) and helium (about 28%). Carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of small amounts of many other elements such as neon, iron, silicon, magnesium and sulfur.

The sun is 70% made of Hydrogen.

What is hydrogen?

The element hydrogen has the sign H and the atomic number 1. The lightest element is hydrogen. Under normal conditions, hydrogen is a gas composed of diatomic molecules with the formula H2. It has no colour, no odour, no taste, is non-toxic, and is extremely flammable. Hydrogen is the most prevalent chemical element in the universe, accounting for approximately 75% of all normal matter. The Sun and other stars are mostly made up of hydrogen in the plasma state. The majority of hydrogen on Earth resides in molecule forms like water and organic substances. Each atom of hydrogen's most common isotope (symbol 1H) has one proton, one electron, and no neutrons.

The sun is around 70% made of Hydrogen and 28% Helium

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The radial acceleration of the blade tip is  1370 g rad/s².

Radial acceleration is defined as "the acceleration of the object is along the radius, directed towards the center" in uniform circular motion.

Given parameters:

Rotational speed of the helicopter rotor: ω = 600 rev/min

= 600 × 2π/60 rad/min.

= 20π rad/min.

Length of the blade: r = 3.4 m.

Then,   the radial acceleration = ω²r = (20π)²× 3.4 rad/s².

= {(20π)²× 3.4}/9.8 g rad/s².

= 1370 g rad/s².

Hence,  the radial acceleration of the blade tip is  1370 g rad/s².

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With the use of formulas, the maximum height reached by the cannonball is 635.4 meters

The motion of an object under gravity is the vertical motion of the object under the influence of acceleration due to gravity.

If I shoot a cannonball (m = 4.5 kg) straight up from a cannon that exerts a force of 7000 N through a barrel length of 4.00 meters, the acceleration of the cannonball in the barrel can be calculated by using the formula

F = ma

Where

Substitute all the parameters into the formula

7000 = 4.5a

a = 7000/4.5

a = 1555.6 m/s²

By using the below formula, we will find the velocity at which the ball leaves the barrel.

Where

v² = u² + 2as

v² = 0 + 2 × 1555.6 × 4

v² = 12444.4

v = √12444.4

v = 111.6 m/s

The same speed will be the initial velocity at the entrance of the barrel. How high will the cannonball go can be known by using the formula

v² = u² - 2gH

Where

Substitute all the parameters into the formula

0 = 111.6² - 2 × 9.8 × H

19.6H = 12454.56

H = 12454.56/19.6

H = 635.4 m

Therefore, the cannonball will go as high as 635.4 m

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The kinetic energy of the blocks that is lost due to the collision is 8.64 J.

The initial speed of the smaller block is calculated by applying the following equation.

m₁u₁  +  m₂u₂ = v(m₁ + m₂)

where;

9u₁ + 27(0.5) = 0.9(9 + 27)

9u₁ + 13.5 = 32.4

9u₁ = 18.9

u₁ = 18.9/9

u₁ = 2.1 m/s

The total initial kinetic energy of the blocks is calculated as follows;

K.Ei = ¹/₂m₁u₁²  +  ¹/₂m₂u₂²

K.Ei = ¹/₂(9)(2.1)²    +    ¹/₂(27)(0.5)²

K.Ei = 23.22 J

The final kinetic energy of the blocks is calculated as follows;

K.Ef = ¹/₂(m₁ + m₂)v²

K.Ef = ¹/₂(9 + 27) x (0.9)²

K.Ef = 14.58 J

The change in the kinetic energy of the block is calculated as;

ΔK.E = K.Ef  -  K.Ei

ΔK.E = 14.58 J   -   23.22 J

ΔK.E = -8.64 J

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The average acceleration of the hybrid automobile is 0.42 m/s².

The distance travelled by the hybrid automobile during the period of acceleration is 34.5 m.

The average acceleration of the hybrid automobile is the rate of change of velocity of the hybrid automobile with time.

Mathematically, the formula for average acceleration is given as;

a = Δv/Δt

where;

a = (v - u)/t

where;

a = (5.56 - 1.389)/10

a = 0.42 m/s²

The distance travelled by the automobile during the period of acceleration is calculated as follows;

v² = u² + 2as

2as = v² - u²

s = (v² - u²)/(2a)

s = (5.56² - 1.389²) / (2 x 0.42)

s = 34.5 m

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P = I²R = (10 A)² (120 Ω) = 120 000 Watts = 120 kW

Answer:

it has water

Explanation:

water is good